SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C. 20549
                                    FORM 10-Q


(Mark One)
X  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE
   ACT OF 1934
For the quarterly period ended September 30, 1999.
                                       OR
__ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE
   ACT OF 1934
For the transition period from ________ to ________.


                         COMMISSION FILE NUMBER 0-14703


                                NBT BANCORP INC.
             (Exact Name of Registrant as Specified in its Charter)

                  DELAWARE                     16-1268674
          (State of Incorporation) (I.R.S. Employer Identification No.)

                  52 SOUTH BROAD STREET NORWICH, NEW YORK 13815
               (Address of Principal Executive Offices)(Zip Code)

       Registrant's Telephone Number, Including Area Code: (607) 337-2265

Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for shorter periods that the Registrant was required
to file such reports),  and (2) has been subject to such filing requirements for
the past 90 days. Yes X No

As of  October  31,  1999,  there  were  12,431,189  shares  outstanding  of the
Registrant's  common stock, No Par, Stated Value $1.00.  There were no shares of
the  Registrant's  preferred  stock, No Par, Stated Value $1.00,  outstanding at
that date.

An index to exhibits follows the signature page of this FORM 10-Q.

                                      -1-

                                NBT BANCORP INC.
                   FORM 10-Q--Quarter Ended September 30, 1999

                                TABLE OF CONTENTS


PART I       FINANCIAL INFORMATION

Item 1       Interim Financial Statements (Unaudited)

             Consolidated  Balance  Sheets at September  30, 1999,  December 31,
             1998 (Audited), and September 30, 1998

             Consolidated  Statements  of Income  for the  three  month and nine
             month periods ended September 30, 1999 and 1998

             Consolidated  Statements of Stockholders' Equity for the nine month
             periods ended September 30, 1999 and 1998

             Consolidated  Statements  of Cash Flows for the nine month  periods
             ended September 30, 1999 and 1998

             Consolidated Statements of Comprehensive Income for the three month
             and nine month periods ended September 30, 1999 and 1998

             Notes to Interim Consolidated Financial Statements at September 30,
             1999

Item 2       Management's Discussion and  Analysis  of  Financial  Condition and
             Results of Operations

Item 3       Quantitative and Qualitative Disclosures About Market Risk
             Information  called for by Item 3 is contained in the Liquidity and
             Interest  Rate  Sensitivity  Management  section of the  Management
             Discussion and Analysis.

PART II      OTHER INFORMATION

Item 1       Legal Proceedings
Item 2       Changes in Securities
Item 3       Defaults Upon Senior Securities
Item 4       Submission of Matters to a Vote of Security Holders
Item 5       Other Information
Item 6       Exhibits and Reports on FORM 8-K

SIGNATURES

INDEX TO EXHIBITS

                                      -2-




NBT BANCORP INC. AND SUBSIDIARY                                      SEPTEMBER 30,     December 31,     September 30,
CONSOLIDATED BALANCE SHEETS                                              1999              1998             1998
- ----------------------------------------------------------------------------------------------------------------------
(in thousands, except share and per share data)                      (UNAUDITED)                        (Unaudited)
                                                                                               
ASSETS
Cash                                                                  $   44,801       $   47,181       $   47,703
Loans held for sale                                                        3,511            2,887            2,854
Securities available for sale, at fair value                             355,137          355,758          392,982
Securities held to maturity (fair value-$41,215,
 $35,095 and $36,203)                                                     41,216           35,095           36,203
Loans:
 Commercial and agricultural                                             432,950          388,509          366,938
 Real estate mortgage                                                    174,204          160,025          153,905
 Consumer                                                                291,514          272,971          276,761
- ----------------------------------------------------------------------------------------------------------------------
  Total loans                                                            898,668          821,505          797,604
 Less allowance for loan losses                                           13,555           12,962           12,611
- ----------------------------------------------------------------------------------------------------------------------
  Net loans                                                              885,113          808,543          784,993
Premises and equipment, net                                               20,853           20,241           20,417
Intangible assets, net                                                     6,828            7,572            7,825
Other assets                                                              20,800           12,732            9,966
- ----------------------------------------------------------------------------------------------------------------------
TOTAL ASSETS                                                          $1,378,259       $1,290,009       $1,302,943
- ----------------------------------------------------------------------------------------------------------------------

LIABILITIES AND STOCKHOLDERS' EQUITY
Deposits:
 Demand (noninterest bearing)                                         $  157,618       $  154,146       $  142,383
 Savings, NOW, and money market                                          386,245          391,614          385,872
 Time                                                                    550,610          498,445          504,852
- ----------------------------------------------------------------------------------------------------------------------
  Total deposits                                                       1,094,473        1,044,205        1,033,107
Short-term borrowings                                                    113,163           96,589          120,215
Long-term debt                                                            35,161           10,171           10,174
Other liabilities                                                          7,583            8,412            6,941
- ----------------------------------------------------------------------------------------------------------------------
  Total liabilities                                                    1,250,380        1,159,377        1,170,437
- ----------------------------------------------------------------------------------------------------------------------

Commitments and contingencies

Stockholders' equity:
   Preferred stock, no par, stated value $1.00; shares
    authorized-2,500,000                                                       -                -                -
   Common stock, no par, stated value $1.00; shares
    authorized-15,000,000; shares issued 13,015,789,
    13,015,789 and 12,425,758                                             13,016           13,016           12,426
   Capital surplus                                                       111,221          111,749           97,165
   Retained earnings                                                      23,540           15,512           28,152
   Accumulated other comprehensive income (loss)                          (7,117)           3,317            5,285
   Common stock in treasury at cost, 590,489,
    599,507 and 501,249 shares                                           (12,781)         (12,962)         (10,522)
- ----------------------------------------------------------------------------------------------------------------------
  Total stockholders' equity                                             127,879          130,632          132,506
- ----------------------------------------------------------------------------------------------------------------------
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY                            $1,378,259       $1,290,009       $1,302,943
- ----------------------------------------------------------------------------------------------------------------------


See notes to interim consolidated financial statements.

                                      -3-



                                                          Three months ended                  Nine months ended
NBT BANCORP INC. AND SUBSIDIARY                              September 30,                      September 30,
CONSOLIDATED STATEMENTS OF INCOME                        1999             1998              1999             1998
- -------------------------------------------------------------------------------------------------------------------
(in thousands, except per share data)                                         (Unaudited)
                                                                                              
Interest and fee income:
Loans and loans held for sale                         $19,646          $18,100           $56,076          $52,701
Securities - taxable                                    6,425            6,966            18,301           22,233
Securities - tax exempt                                   282              281               760              836
Other                                                      76              101               232              210
- -------------------------------------------------------------------------------------------------------------------
  Total interest and fee income                        26,429           25,448            75,369           75,980
- -------------------------------------------------------------------------------------------------------------------

Interest expense:
Deposits                                                8,758            9,344            25,344           28,423
Short-term borrowings                                   1,600            1,405             3,882            4,525
Long-term debt                                            474              136             1,098              326
- -------------------------------------------------------------------------------------------------------------------
  Total interest expense                               10,832           10,885            30,324           33,274
- -------------------------------------------------------------------------------------------------------------------
Net interest income                                    15,597           14,563            45,045           42,706
Provision for loan losses                                 975            1,300             2,925            3,550
- -------------------------------------------------------------------------------------------------------------------
Net interest income after provision for loan losses    14,622           13,263            42,120           39,156
- -------------------------------------------------------------------------------------------------------------------

Noninterest income:
Trust                                                     835              803             2,505            2,407
Service charges on deposit accounts                     1,088              956             3,108            2,725
Net securities gains                                      837              168             1,507              613
Other                                                     684              594             2,086            1,883
- -------------------------------------------------------------------------------------------------------------------
  Total noninterest income                              3,444            2,521             9,206            7,628
- -------------------------------------------------------------------------------------------------------------------

Noninterest expense:
Salaries and employee benefits                          5,025            4,920            14,166           14,214
Office supplies and postage                               390              441             1,330            1,406
Occupancy                                                 700              656             2,109            2,037
Equipment                                                 666              668             1,974            1,728
Professional fees and outside services                    857              724             2,010            1,987
Data processing and communications                        965              872             2,843            2,635
Amortization of intangible assets                         244              255               745              817
Other operating                                         1,239            1,171             2,763            3,824
- -------------------------------------------------------------------------------------------------------------------
  Total noninterest expense                            10,086            9,707            27,940           28,648
- -------------------------------------------------------------------------------------------------------------------
Income before income taxes                              7,980            6,077            23,386           18,136
Income taxes                                            3,167            1,346             9,030            3,623
- -------------------------------------------------------------------------------------------------------------------
   NET INCOME                                         $ 4,813          $ 4,731           $14,356          $14,513
- -------------------------------------------------------------------------------------------------------------------

Earnings Per Share:
     Basic                                            $  0.39          $  0.38           $  1.16          $  1.15
     Diluted                                          $  0.38          $  0.37           $  1.14          $  1.13
- -------------------------------------------------------------------------------------------------------------------


All per share data has been restated to give retroactive effect to stock
dividends and splits.

See notes to interim consolidated financial statements.

                                      -4-




NBT BANCORP INC. AND SUBSIDIARY
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED)
- ------------------------------------------------------------------------------------------------------------------------
                                                                             Accumulated
                                                                                   Other
                                     Common       Capital      Retained    Comprehensive      Treasury
                                      Stock       Surplus      Earnings    Income (Loss)         Stock          Total
- ------------------------------------------------------------------------------------------------------------------------
(in thousands, except share and per share data)
                                                                                           
BALANCE AT DECEMBER 31, 1997        $ 9,430      $ 96,494       $22,249         $  2,373      $ (7,203)      $123,343
Net income                                                       14,513                                        14,513
Cash dividends - $0.446 per share                                (5,603)                                       (5,603)
Effect of 4 for 3 split in the
  form of a stock dividend            2,996                      (2,996)
Payment in lieu of fractional shares                                (11)                                          (11)
Purchase of 214,700 treasury shares                                                             (5,791)        (5,791)
Sale of 129,322 treasury shares to
  employee benefit plans and other
  stock plans                                         671                                        2,472          3,143
Unrealized gain on securities
  available for sale, net of
  reclassification adjustment,
  and deferred taxes of $2,011                                                     2,912                        2,912
- ------------------------------------------------------------------------------------------------------------------------
BALANCE AT SEPTEMBER 30, 1998       $12,426      $ 97,165       $28,152         $  5,285      $(10,522)      $132,506
- ------------------------------------------------------------------------------------------------------------------------

BALANCE AT DECEMBER 31, 1998        $13,016      $111,749       $15,512         $  3,317      $(12,962)      $130,632
Net income                                                       14,356                                        14,356
Cash dividends - $0.510 per share                                (6,312)                                       (6,312)
Payment in lieu of fractional shares                                (16)                                          (16)
Purchase of 213,500 treasury shares                                                             (4,643)        (4,643)
Sale of 222,518 treasury shares to
  employee benefit plans and other
  stock plans                                        (528)                                       4,824          4,296
Unrealized loss on securities
  available for sale, net of
  reclassification adjustment,
  and deferred taxes of $7,206                                                   (10,434)                     (10,434)
- ------------------------------------------------------------------------------------------------------------------------
BALANCE AT SEPTEMBER 30, 1999       $13,016      $111,221       $23,540         $ (7,117)     $(12,781)      $127,879
- ------------------------------------------------------------------------------------------------------------------------


See notes to interim consolidated financial statements.

                                      -5-




NBT BANCORP INC. AND SUBSIDIARY                                                 Nine Months Ended September 30,
CONSOLIDATED STATEMENTS OF CASH FLOWS                                               1999                 1998
- -----------------------------------------------------------------------------------------------------------------
(in thousands)                                                                          (Unaudited)
                                                                                             
OPERATING ACTIVITIES:
Net income                                                                     $  14,356           $   14,513
Adjustments to reconcile net income to net cash provided
 by operating activities:
  Provision for loan losses                                                        2,925                3,550
  Depreciation of premises and equipment                                           1,649                1,514
  Amortization of premiums and accretion of discounts on securities               (1,181)              (1,437)
  Amortization of intangible assets                                                  745                  817
  Proceeds from sales of loans originated for sale                                 1,734                3,219
  Loans originated for sale                                                       (2,358)              (2,787)
  Net gain on sale of other real estate owned                                       (543)                 (83)
  Net realized gains on sales of securities                                       (1,507)                (613)
  (Increase) decrease in interest receivable                                        (883)                  37
  Increase in interest payable                                                       567                   62
  Other, net                                                                      (1,983)              (1,615)
- -----------------------------------------------------------------------------------------------------------------
Net cash provided by operating activities                                         13,521               17,177
- -----------------------------------------------------------------------------------------------------------------
INVESTING ACTIVITIES:
Securities available for sale:
  Proceeds from maturities                                                        49,922               53,806
  Proceeds from sales                                                             57,571              110,869
  Purchases                                                                     (121,824)            (110,052)
Securities held to maturity:
  Proceeds from maturities                                                        16,808               16,886
  Purchases                                                                      (22,929)             (16,950)
Net increase in loans                                                            (79,775)             (65,546)
Purchase of premises and equipment, net                                           (2,261)              (3,170)
Proceeds from sales of other real estate owned                                     1,430                  896
- -----------------------------------------------------------------------------------------------------------------
Net cash used in investing activities                                           (101,058)             (13,261)
- -----------------------------------------------------------------------------------------------------------------
FINANCING ACTIVITIES:
Net increase in deposits                                                          50,268               18,924
Net increase (decrease) in short-term borrowings                                  16,574              (14,312)
Proceeds from issuance of long-term debt                                          25,000               10,000
Repayments of long-term debt                                                         (10)                  (9)
Proceeds from issuance of treasury shares to employee benefit
 plans and other stock plans                                                       4,296                3,143
Purchase of treasury stock                                                        (4,643)              (5,791)
Cash dividends and payment for fractional shares                                  (6,328)              (5,614)
- -----------------------------------------------------------------------------------------------------------------
Net cash provided by financing activities                                         85,157                6,341
- -----------------------------------------------------------------------------------------------------------------
Net increase in cash and cash equivalents                                         (2,380)              10,257
Cash and cash equivalents at beginning of year                                    47,181               37,446
- -----------------------------------------------------------------------------------------------------------------
CASH AND CASH EQUIVALENTS AT END OF PERIOD                                     $  44,801           $   47,703
- -----------------------------------------------------------------------------------------------------------------
SUPPLEMENTAL  DISCLOSURE OF CASH FLOW  INFORMATION:  Cash paid during the period
 for:
  Interest                                                                     $  29,757           $   33,212
  Income taxes                                                                     9,156                5,211
- -----------------------------------------------------------------------------------------------------------------


See notes to interim consolidated financial statements.

                                      -6-




                                                                    Three months ended              Nine months ended
NBT BANCORP INC. AND SUBSIDIARY                                       September 30,                   September 30,
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME                    1999           1998            1999            1998
- ------------------------------------------------------------------------------------------------------------------------
(in thousands)                                                                      (Unaudited)

                                                                                                   
Net Income                                                      $ 4,813         $4,731        $ 14,356         $14,513
- ------------------------------------------------------------------------------------------------------------------------

Other comprehensive income, net of tax
     Unrealized holding gains (losses) arising during
         period [pre-tax amounts of  $(3,712),
         $5,054, $(16,133) and $5,536]                           (2,196)         2,984          (9,543)          3,275
     Less: Reclassification adjustment for net gains
         included in net income [pre-tax amounts of
         $(837), $(168), $(1,507) and $(613)]                      (495)           (99)           (891)           (363)
- ------------------------------------------------------------------------------------------------------------------------
Total other comprehensive income (loss)                          (2,691)         2,885         (10,434)          2,912
- ------------------------------------------------------------------------------------------------------------------------
Comprehensive income                                            $ 2,122         $7,616        $  3,922         $17,425
- ------------------------------------------------------------------------------------------------------------------------


See notes to interim consolidated financial statements.

                                      -7-


NBT BANCORP INC. AND SUBSIDIARY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
SEPTEMBER 30, 1999

BASIS OF PRESENTATION
The  accompanying   unaudited  consolidated  financial  statements  include  the
accounts of NBT Bancorp Inc. (the Registrant) and its  wholly-owned  subsidiary,
NBT Bank, N. A. (Bank).  All intercompany  transactions  have been eliminated in
consolidation.  Certain amounts previously reported in the financial  statements
have  been   reclassified  to  conform  with  the  current   presentation.
     The  determination of the allowance for loan losses is a material  estimate
that is  particularly  susceptible  to  significant  change in the near term. In
connection with the  determination of the allowance for loan losses,  management
obtains independent appraisals for significant properties.
     The  balance  sheet at  December  31, 1998 has been  derived  from  audited
financial   statements  at  that  date.  The  accompanying   unaudited   interim
consolidated   financial  statements  have  been  prepared  in  accordance  with
generally accepted accounting  principles for interim financial  information and
with  the   instructions  to  FORM  10-Q  and  Rule  10-01  of  Regulation  S-X.
Accordingly,  they do not include all of the information and footnotes  required
by generally accepted accounting  principles for complete financial  statements.
In the opinion of management,  all adjustments  (consisting of normal  recurring
accruals)  considered  necessary  for a fair  presentation  have been  included.
Operating  results for the nine month  period ended  September  30, 1999 are not
necessarily  indicative  of the results that may be expected for the year ending
December 31, 1999. For further information,  refer to the consolidated financial
statements and footnotes  thereto included in the Registrant's  annual report on
FORM 10-K for the year ended December 31, 1998.
     On October  25,  1999,  Bancorp  announced  the  declaration  of a 5% stock
dividend and a regular quarterly cash dividend of $0.17 per share. The stock and
cash dividends will be paid on December 15, 1999 to shareholders of record as of
December 1, 1999.  The cash  dividend  will be paid on the  increased  number of
shares.  Amounts per common  share have not been  adjusted  for the  prospective
December 15, 1999 stock dividend.  The adjustment for purposes of  comparability
will occur after the payment date.
     On August 16, 1999,  the  Registrant  announced the signing of a definitive
agreement of merger with Lake Ariel Bancorp,  Inc. ("Lake Ariel"). The merger is
subject  to  the  approval  of  each  company's   shareholders  and  of  banking
regulators.  The merger is expected to close in the first quarter of 2000 and is
intended  to be  accounted  for as a  pooling-of-interests  and to  qualify as a
tax-free exchange for Lake Ariel  shareholders.  Shareholders of Lake Ariel will
receive a minimum of 0.8315  shares and a maximum of 0.9487 shares of NBT common
stock for each share  exchanged.  Based on the August 13 closing price of $20.25
for NBT Bancorp Inc.  common  stock,  NBT will issue  approximately  4.6 million
shares and share  equivalents in exchange for all of the Lake Ariel common stock
and share equivalents outstanding. The transaction is valued at $92.8 million or
$18.50  per  share for the  outstanding  shares of Lake  Ariel.  Lake  Ariel has
provided NBT an option to acquire up to 965,300  shares of Lake  Ariel's  common
stock exercisable in the event of certain circumstances  involving  transactions
with third parties,  acts of third parties, or break-up of the merger agreement.
Concurrent with this announcement, NBT Bancorp Inc. reduced its stock repurchase
plan from 600,000  shares to 200,000 which leaves  76,500  shares  remaining for
repurchase under the reduced plan.

                                      -8-


     Basic  earnings  per share  excludes  dilution  and is computed by dividing
income available to common shareholders by the weighted average number of common
shares  outstanding  for the period.  Diluted  earnings  per share  reflects the
potential  dilution that could occur if  securities or other  contracts to issue
common stock were  exercised  or converted  into common stock or resulted in the
issuance  of common  stock that then shared in the  earnings of the entity.  All
share and per share data has been adjusted retroactively for stock dividends and
splits.  The  following is a  reconciliation  of basic and diluted  earnings per
share for the periods presented in the income statement.



- --------------------------------------------------------------------------------------------------
Three months ended September 30,                                       1999                 1998
- --------------------------------------------------------------------------------------------------
(in thousands, except per share data)
                                                                                   
Basic EPS:
  Weighted average common shares outstanding                         12,398               12,571
  Net income available to common shareholders                       $ 4,813              $ 4,731
- --------------------------------------------------------------------------------------------------
Basic EPS                                                           $  0.39              $  0.38
- --------------------------------------------------------------------------------------------------

Diluted EPS:
  Weighted average common shares outstanding                         12,398               12,571
  Dilutive common stock options                                         113                  274
- --------------------------------------------------------------------------------------------------
  Weighted average common shares and common
   share equivalents                                                 12,511               12,845
  Net income available to common shareholders                       $ 4,813              $ 4,731
- --------------------------------------------------------------------------------------------------
Diluted EPS                                                         $  0.38              $  0.37
- --------------------------------------------------------------------------------------------------


- --------------------------------------------------------------------------------------------------
Nine months ended September 30,                                        1999                 1998
- --------------------------------------------------------------------------------------------------
(in thousands, except per share data)

Basic EPS:
  Weighted average common shares outstanding                         12,402               12,611
  Net income available to common shareholders                       $14,356              $14,513
- --------------------------------------------------------------------------------------------------
Basic EPS                                                           $  1.16              $  1.15
- --------------------------------------------------------------------------------------------------

Diluted EPS:
  Weighted average common shares outstanding                         12,402               12,611
  Dilutive common stock options                                         136                  255
- --------------------------------------------------------------------------------------------------
  Weighted average common shares and common
   share equivalents                                                 12,538               12,866
  Net income available to common shareholders                       $14,356              $14,513
- --------------------------------------------------------------------------------------------------
Diluted EPS                                                         $  1.14              $  1.13
- --------------------------------------------------------------------------------------------------


                                      -9-


NBT BANCORP INC. AND SUBSIDIARY
ITEM 2 -- MANAGEMENT'S  DISCUSSION  AND  ANALYSIS  OF  FINANCIAL  CONDITION  AND
RESULTS OF OPERATIONS

The  purpose of this  discussion  and  analysis  is to provide the reader with a
concise  description of the financial condition and results of operations of NBT
Bancorp Inc.  (Bancorp) and its wholly owned  subsidiary,  NBT Bank, N.A. (Bank)
collectively  referred to herein as the Company.  This  discussion will focus on
Results of Operations, Financial Position, Capital Resources and Asset/Liability
Management.  Reference  should be made to the Company's  consolidated  financial
statements  and footnotes  thereto  included in this FORM 10-Q as well as to the
Company's 1998 FORM 10-K for an  understanding  of the following  discussion and
analysis.  In June of 1998, the Company distributed a four-for-three stock split
effected in the form of a 33 1/3% stock dividend.  In December 1998, the Company
distributed  a 5% stock  dividend,  the  thirty-ninth  consecutive  year a stock
dividend has been declared. Throughout this discussion and analysis, amounts per
common share and common shares outstanding have been adjusted  retroactively for
stock dividends and splits.
     On October  25,  1999,  Bancorp  announced  the  declaration  of a 5% stock
dividend and a regular quarterly cash dividend of $0.17 per share. The stock and
cash dividends will be paid on December 15, 1999 to shareholders of record as of
December 1, 1999.  The cash  dividend  will be paid on the  increased  number of
shares.  Amounts per common  share have not been  adjusted  for the  prospective
December 15, 1999 stock dividend.  The adjustment for purposes of  comparability
will occur after the payment date.
     On August 16, 1999,  the  Registrant  announced the signing of a definitive
agreement of merger with Lake Ariel Bancorp,  Inc. ("Lake Ariel"). The merger is
subject  to  the  approval  of  each  company's   shareholders  and  of  banking
regulators.  The merger is expected to close in the first quarter of 2000 and is
intended  to be  accounted  for as a  pooling-of-interests  and to  qualify as a
tax-free exchange for Lake Ariel  shareholders.  Shareholders of Lake Ariel will
receive a minimum of 0.8315  shares and a maximum of 0.9487 shares of NBT common
stock for each share  exchanged.  Based on the August 13 closing price of $20.25
for NBT Bancorp Inc.  common  stock,  NBT will issue  approximately  4.6 million
shares and share  equivalents in exchange for all of the Lake Ariel common stock
and share equivalents outstanding. The transaction is valued at $92.8 million or
$18.50  per  share for the  outstanding  shares of Lake  Ariel.  Lake  Ariel has
provided NBT an option to acquire up to 965,300  shares of Lake  Ariel's  common
stock exercisable in the event of certain circumstances  involving  transactions
with third parties,  acts of third parties, or break-up of the merger agreement.
Concurrent with this announcement, NBT Bancorp Inc. reduced its stock repurchase
plan from 600,000  shares to 200,000 which leaves  76,500  shares  remaining for
repurchase under the reduced plan.
     Certain statements in this release and other public releases by the Company
contain  forward-looking  information,  as  defined  in the  Private  Securities
Litigation  Reform Act. These statements may be identified by the use of phrases
such as "anticipate,"  "believe,"  "expect,"  "forecasts,"  "projects," or other
similar terms.  Actual results may differ materially from these statements since
such statements  involve  significant known and unknown rules and uncertainties.
Factors  that  may  cause  actual  results  to  differ   materially  from  those
contemplated  by such  forward-looking  statements  include,  among others,  the
following possibilities: (1) an increase in competitive pressures in the banking
industry;  (2)  changes in the  interest  rate  environment;  (3) changes in the
regulatory  environment;  (4) general economic  environment  conditions,  either
nationally or regionally,  may be less  favorable  than expected,  resulting in,
among other things, a deterioration in credit quality;  (5) changes may incur in
business conditions and inflation;  and (6) unforeseen risks associated with the
Year 2000 issue.

YEAR 2000
The Year 2000 issue  presents a number of difficult  challenges  to the Company.
Information  systems are often complex and have been  developed  over many years
through a variety of computer  languages and hardware  platforms.  The Year 2000
issue refers to the programming of existing  software  applications  using a two
digit year field.  This coding presents a potential problem when the year begins
with "20", instead of "19".  Computers may interpret the year as 1900 instead of
2000, creating possible system failure or miscalculation of financial data.

                                      -10-


     A committee  continues to direct the Company's Year 2000  activities  under
the framework of the FFIEC's  Five-Step  Program.  The FFIEC's Five-Step Program
includes the following phases: Awareness, Assessment, Renovation, Validation and
Implementation.  The  Awareness  Phase,  100%  complete,  defines  the Year 2000
problem and gains executive level support for the necessary resources to prepare
the Company for Year 2000  compliance.  The  Assessment  Phase,  100%  complete,
assesses the size and complexity of the problem and details the magnitude of the
effort  necessary to address the Year 2000 issues.  Although the  Awareness  and
Assessment  Phases are  complete,  the Company will continue to evaluate any new
issues as they  arise.  The  Renovation  Phase,  100%  complete,  includes  code
enhancements,   hardware  and  software  updates,  system  replacements,  vendor
certification,   and  other  associated  changes.  The  Validation  Phase,  100%
complete,  includes the testing of incremental  changes to hardware and software
components. The Implementation Phase, 100% complete,  certifies that systems are
Year 2000  compliant  and have been  accepted by the end users.  The Company has
been addressing  Informational  Technology (IT) and non IT systems.  The Company
has categorized all systems as mission  critical,  high,  medium or low priority
with respect to its ability to  influence  business  functions.  The Company has
completed the testing and review of all applications  without negative findings.
In some  cases,  the Company is relying on the service  providers  and  software
vendors to facilitate proxy testing with a select group of users,  including the
Company.  The Company  approved the test plans to ensure Year 2000 compliance of
those systems. The Company has also contracted with McGladrey and Pullen, LLP to
perform  an  independent  third  party  review of all proxy  test  results.  The
McGladrey  and Pullen,  LLP review did not  identify any  significant  Year 2000
issues.  To ensure  compliance  of non IT systems where testing is not possible,
the  Company  has  contacted  the  manufacturers  and  suppliers  for Year  2000
certification.  Based on responses  from  manufacturers  and suppliers of non IT
systems,  the Company does not anticipate incurring any material expenses due to
unpreparedness of the non IT systems.
     The Company has identified  material third party  relationships to minimize
the potential loss from  unpreparedness of these parties.  The Company continues
to work closely with Fiserv,  its data services and items  processing  provider,
regarding Year 2000 compliance.
     The Company  has tested its mission  critical  trust  accounting  system to
ensure  Year 2000  compliance.  The testing  and  validation  of this system was
completed  during the fourth  quarter of 1998.  Test  results  were  reviewed by
internal  staff  and did not  disclose  any  significant  Year 2000  issues.  In
addition,  the system was also tested by the software vendor and two user groups
made up of other banks.  Results of these tests did not identify any significant
Year 2000 issues.  Non mission  critical  systems in use by the trust department
have been reviewed for Year 2000 compliance.  In addition,  the trust department
is following the FFIEC's Year 2000  Fiduciary  Service  Guidance.  The fiduciary
review includes the following  steps:  account and asset  administration,  third
party risk, counter party risk,  transfer agent risk, and client  disclosure.  A
Year 2000  compliance  review is being  conducted  on those  companies  in which
significant  trust  assets  are  invested.  As of  September  30,  1999,  95% of
discretionary  securities  identified as significant  have received at least two
reviews. Updates on the status of these companies will continue throughout 1999.
The trust account review process has been modified to include specific Year 2000
issues.  Third party and counter  party  fiduciary  risk is being  addressed  by
communicating with various vendors and service providers to ascertain their Year
2000  compliance.  All customers and  beneficiaries of the trust department have
been contacted  regarding the Company's efforts to identify and reduce Year 2000
risk.
     The Company has  evaluated the Year 2000  readiness of its major  borrowers
and fund providers to assess their  readiness and identify  potential  problems.
The  Company  has  assessed  the  preparedness  of  its  75  largest  commercial
borrowers,  as well as 150 random  commercial  borrowers.  These  borrowers were
evaluated  and rated as low,  medium or high risk.  For the medium and high risk
customers, an action plan for compliance has been developed, up to and including
credit risk downgrades and requests for additional  collateral.  The Company has
also assessed the preparedness of its 60 largest deposit account  relationships,
as well as 45 random depositors.  The providers were also evaluated and rated as
low, medium or high risk. The Company has scheduled follow up with the high risk
and material fund providers to ensure they are taking  necessary steps to become
Year 2000  compliant.  The Company  also  completed an  assessment  of its other
material  funding sources and counter parties,  with no high risk  relationships
being  identified.  Continuous  monitoring of significant new  relationships  is
performed  to ensure  Year 2000  preparedness.  In  addition,  the  Company  has
modified its liquidity crisis plan to minimize funding risk due to the Year 2000
issue.  The  Company is  monitoring  customer  behavior  to  determine  the cash
availability  requirements  and the associated  impact to its liquidity  funding
position and will update the liquidity crisis plan as necessary.
     As of September 30, 1999 the Company has incurred approximately $590,000 in
expenses  directly  related to the Year 2000  issue.  Additionally,  the Company
forecasts  spending  approximately  $60,000 by December  31, 1999 to ensure Year
2000  readiness.  These  amounts  include the cost of  additional  hardware  and
software,  as  well  as  technology  consultants  contracted  to  assist  in the
preparation for the Year 2000; however,  they do not include a valuation for the
considerable time employees spent or will spend on Year 2000  preparedness.  The
Company has included the cost of the Year 2000 issue in its 1999 annual  budget.
Due to the  uniqueness  of the Year 2000 issue,  it is difficult to quantify the
potential  loss in revenue.  Based on efforts to ensure  systems  will  function
properly,  the Company  believes it reasonable  that no material loss in revenue
will occur. The Company believes that its reasonably likely worst case Year 2000
scenario is a material  increase in credit  losses due to Year 2000  problems of
the Company's  borrowers,  as well as disruption  in financial  markets  causing
liquidity stress. As previously mentioned, the Company has attempted to minimize
these  risks by  identifying  the  material  borrowers  and fund  providers  and
assessing their progress toward Year 2000 compliance.

                                      -11-

     The Company has developed a business  resumption  contingency  plan to help
ensure  continued  operations  in the event of Year 2000 system  failures.  This
contingency  plan is consistent with the Company's  disaster  recovery plan with
modifications for Year 2000 risks. The business resumption  contingency plan has
been tested and independently validated in accordance with FFIEC guidelines.

OVERVIEW
Net income of $4.8 million ($0.38 diluted  earnings per share) was recognized in
the third  quarter of 1999,  compared to third  quarter  1998 net income of $4.7
million ($0.37 diluted earnings per share).  The third quarter net income before
taxes of $8.0  million was $1.9  million  higher than third  quarter  1998.  The
increase in pre-tax net income can be attributed to improvements in net interest
and noninterest  income.  Third quarter 1998 earnings included an approximate $1
million tax  benefit  available  only  through  year-end  1998,  arising  from a
corporate realignment within the Company.
     Net  income  of $14.4  million  ($1.14  diluted  earnings  per  share)  was
recognized for the nine month period ended  September 30, 1999,  compared to the
first nine months in 1998 net income of $14.5 million  ($1.13  diluted  earnings
per share). The first nine months of 1998 included an approximate $3 million tax
benefit previously  described.  Net income before taxes of $23.4 million for the
first nine months of 1999 increased $5.3 million  compared to the same period of
1998.  The increase in pre tax income for the nine month period ended  September
30, 1999 was driven by factors similar to those of third quarter 1999.
     Table 1 depicts several measurements of performance on an annualized basis.
Returns on average assets and equity measure how  effectively an entity utilizes
its total resources and capital, respectively. Both the return on average assets
and the return on average  equity  ratios  decreased  for the nine month  period
ended  September  30,  1999  compared to the same  period a year  previous.  The
decline in these ratios can be attributed  to the  increased  income tax expense
previously mentioned.
     Net interest margin,  net federal taxable  equivalent (FTE) interest income
divided by average  interest-earning assets, is a measure of an entity's ability
to utilize its  earning  assets in  relation  to the  interest  cost of funding.
Taxable  equivalency  adjusts  income by increasing tax exempt income to a level
that is comparable to taxable income before taxes are applied.



TABLE 1
PERFORMANCE MEASUREMENTS
- ---------------------------------------------------------------------------------------------------
                                       First     Second     THIRD       NINE    Fourth     Twelve
                                     Quarter    Quarter   QUARTER     MONTHS   Quarter     Months
- ---------------------------------------------------------------------------------------------------
                                                                         
1999
Return on average assets               1.54%      1.44%     1.40%      1.46%
Return on average equity              14.87%     14.59%    15.17%     14.87%
Net interest margin                    4.96%      4.87%     4.82%      4.88%
- ---------------------------------------------------------------------------------------------------
1998
Return on average assets               1.60%      1.47%     1.46%      1.51%     1.40%      1.48%
Return on average equity              16.49%     14.92%    14.54%     15.30%    13.87%     14.93%
Net interest margin                    4.75%      4.68%     4.79%      4.74%     4.80%      4.76%
- ---------------------------------------------------------------------------------------------------

                                      -12-


NET INTEREST INCOME
Net interest income is the difference between interest income on earning assets,
primarily  loans and  securities,  and  interest  expense  on  interest  bearing
liabilities,  primarily deposits and borrowings. Net interest income is effected
by the interest rate spread,  the difference between the yield on earning assets
and cost of interest bearing liabilities,  as well as the volumes of such assets
and  liabilities.  Table 2 represents  an analysis of net  interest  income on a
federal taxable equivalent basis.
     Federal taxable equivalent (FTE) net interest income increased $1.1 million
for the third quarter of 1999 compared to the same period of 1998. This increase
was primarily a result of the $86.1 million  increase in average earning assets,
less the $62.0 million increase in average interest bearing liabilities.
     Total FTE interest  income  increased $1.1 million over third quarter 1998.
This increase is also a result of the increase in average earning assets, as the
loan portfolio growth has continued.  The increase in average earning assets was
partially  offset by a 22 basis point decrease in the yield on earning assets as
the loan portfolio yield declined.  During the same time period,  total interest
expense remained stable as the increase in average interest bearing  liabilities
was offset by a 27 basis point reduction in cost.
     For the first nine months of 1999, FTE net interest  income  increased $2.5
million over the  comparable  period of 1998.  This can be  attributed  to lower
interest expense as the cost of interest  bearing  liabilities was reduced by 42
basis points, primarily time deposits and short-term borrowings. Interest income
remained stable during this period as the increase in average earning assets was
offset by a 27 basis point decline in yield.
     Another important performance measurement of net interest income is the net
interest  margin.  The net interest margin increased to 4.88% for the first nine
months of 1999, up from 4.74% for the comparable period in 1998. The increase in
the net interest  margin is primarily a result of the  increased  interest  rate
spread,  as the reduction in the cost of interest bearing  liabilities  exceeded
the decline in yield on earning  assets.  Also  contributing to the improved net
interest margin is increased funding of earning assets from noninterest  bearing
sources, as the Company has experienced an increase in demand deposit accounts.

                                      -13-




TABLE 2
COMPARATIVE ANALYSIS OF FEDERAL TAXABLE EQUIVALENT NET INTEREST INCOME
- ----------------------------------------------------------------------------------------------------
                       Three months ended September 30,
Annualized
Yield/Rate                                               Amounts                     Variance
- ----------------------------------------------------------------------------------------------------
 1999    1998  (dollars in thousands)                 1999      1998     TOTAL    VOLUME       RATE
 ----    ----                                         ----      ----     -----    ------       ----
                                                                       
4.99%   5.84%  Interest bearing deposits           $     2   $     2   $     -   $     -    $     -
               Federal funds sold and securities
   -    3.90%   purchased under agreements to resell     -        25       (25)      (12)       (13)
4.93%   5.32%  Other short-term investments             74        74         -         5         (5)
6.76%   6.85%  Securities available for sale         6,228     6,768      (540)     (448)       (92)
6.75%   9.51%  Loans held for sale                      52        61        (9)       11        (20)
               Securities held to maturity:
6.41%   6.84%   Taxable                                218       221        (3)       10        (13)
6.25%   6.81%   Tax exempt                             414       410         4        40        (36)
8.76%   9.15%  Loans                                19,745    18,087     1,658     2,471       (813)
               -------------------------------------------------------------------------------------
8.10%   8.32%  Total interest income                26,733    25,648     1,085     2,077       (992)

2.78%   2.90%  Money Market Deposit Accounts           546       601       (55)      (31)       (24)
1.18%   1.55%  NOW accounts                            410       510      (100)       27       (127)
2.72%   2.72%  Savings accounts                      1,166     1,086        80        81         (1)
5.01%   5.42%  Certificates of deposit               6,636     7,147      (511)       37       (548)
4.98%   5.17%  Short-term borrowings                 1,600     1,405       195       248        (53)
5.35%   5.31%  Long-term debt                          474       136       338       337          1
               -------------------------------------------------------------------------------------
4.00%   4.27%  Total interest expense               10,832    10,885       (53)      699       (752)
               -------------------------------------------------------------------------------------
               Net interest income                 $15,901   $14,763   $ 1,138   $ 1,378    $  (240)
               =====================================================================================
4.10%   4.05%  Interest rate spread
=====   =====  ====================
4.82%   4.79%  Net interest margin
=====   =====  ===================
               FTE adjustment                      $   304   $   200
               ==============                      =======   =======


                       Nine Months Ended September 30,
Annualized
Yield/Rate                                              Amounts                      Variance
- -------------------------------------------------------------------------------------------------------------------------
 1999    1998  (dollars in thousands)                 1999      1998     TOTAL    VOLUME       RATE
 ----    ----                                         ----      ----     -----    ------       ----
                                                                       
4.49%   5.33%  Interest bearing deposits           $     7   $     5   $     2   $     3    $    (1)
               Federal funds sold and securities
4.63%   3.91%   purchased under agreements to resell     2        31       (29)      (35)         6
4.78%   5.36%  Other short-term investments            223       174        49        69        (20)
6.76%   6.98%  Securities available for sale        17,736    21,626    (3,890)   (3,230)      (660)
6.93%   8.58%  Loans held for sale                     171       205       (34)        6        (40)
               Securities held to maturity:
6.46%   6.86%   Taxable                                627       674       (47)       (8)       (39)
6.46%   7.01%   Tax exempt                           1,108     1,219      (111)      (15)       (96)
8.76%   9.23%  Loans                                56,269    52,654     3,615     6,428     (2,813)
               -------------------------------------------------------------------------------------
8.11%   8.38%  Total interest income                76,143    76,588      (445)    3,218     (3,663)

2.75%   2.90%  Money Market Deposit Accounts         1,716     1,846      (130)      (37)       (93)
1.30%   1.63%  NOW accounts                          1,344     1,544      (200)      125       (325)
2.73%   2.79%  Savings accounts                      3,364     3,239       125       199        (74)
4.96%   5.44%  Certificates of deposit              18,920    21,794    (2,874)     (985)    (1,889)
4.83%   5.43%  Short-term borrowings                 3,882     4,525      (643)     (157)      (486)
5.34%   5.32%  Long-term debt                        1,098       326       772       770          2
               ------------------------------------------------------------------------------------
3.93%   4.35%  Total interest expense               30,324    33,274    (2,950)      (85)    (2,865)
               -------------------------------------------------------------------------------------
               Net interest income                 $45,819   $43,314   $ 2,505   $ 3,303    $  (798)
               =====================================================================================
4.18%   4.03%  Interest rate spread
=====   =====  ====================
4.88%   4.74%  Net interest margin
=====   =====  ===================
               FTE adjustment                      $   774   $   608
               ==============                      =======   =======


                             -14-


PROVISION AND ALLOWANCE FOR LOAN LOSSES
The allowance for loan losses is a valuation  allowance  established  to provide
for the  estimated  losses  related  to the  collection  of the  Company's  loan
portfolio. The allowance is maintained at a level considered adequate to provide
for loan loss exposure based on management's  estimate of probable losses in the
portfolio  considering an evaluation of risk,  economic  factors,  and past loss
experience.  Management  determines  the provision and allowance for loan losses
based on a number of factors  including  a  comprehensive  loan  review  program
conducted  throughout the year.  The loan portfolio is continually  evaluated in
order to identify problem loans,  credit  concentration,  and other risk factors
such as economic conditions.  The allowance for loan losses to outstanding loans
at September  30, 1999 is 1.51%,  compared to 1.58% for the same period in 1998.
Management  considers  the  allowance  for loan losses to be  adequate  based on
evaluation and analysis of the loan portfolio.
     Table 3 reflects  changes to the  allowance for loan losses for the periods
presented.  The  allowance  is  increased by  provisions  for losses  charged to
operations  and is reduced  by net  charge-offs.  Charge-offs  are made when the
collectability  of loan  principal  within a reasonable  time is  unlikely.  Any
recoveries  of  previously  charged-off  loans  are  credited  directly  to  the
allowance for loan losses.  Net  charge-offs for the quarter ended September 30,
1999  declined  $0.1 million or 15.8%  compared to the same period of 1998.  Net
charge-offs  for the nine months ended  September 30, 1999 declined $0.2 million
or 7.5%  compared  to the same period of 1998.  Annualized  net  charge-offs  to
average loans  declined to 0.35% for the third quarter of 1999,  down from 0.47%
for the comparable  period of 1998.  Annualized net charge-offs to average loans
declined to 0.36% for the first nine  months of 1999,  compared to 0.44% for the
comparable  period of 1998.  The decline in  charge-offs  and  charge-offs  as a
percentage  of  average  loans  during  1999  indicates  an  improvement  in the
Company's loan quality.



TABLE 3
ALLOWANCE FOR LOAN LOSSES
- ------------------------------------------------------------------------------------------------------------
                                          Three months ended                    Nine months ended
                                             September 30,                        September 30,
(dollars in thousands)                  1999            1998                1999             1998
- ------------------------------------------------------------------------------------------------------------
                                                                              
Balance, beginning of period         $13,361         $12,239             $12,962          $11,582
Recoveries                               231             200                 620              610
Charge-offs                           (1,012)         (1,128)             (2,952)          (3,131)
- ------------------------------------------------------------------------------------------------------------
Net charge-offs                         (781)           (928)             (2,332)          (2,521)
Provision for loan losses                975           1,300               2,925            3,550
- ------------------------------------------------------------------------------------------------------------
Balance, end of period               $13,555         $12,611             $13,555          $12,611
- ------------------------------------------------------------------------------------------------------------

COMPOSITION OF NET (CHARGE-OFFS) RECOVERIES
- ------------------------------------------------------------------------------------------------------------
                                                                            
Commercial and agricultural             (503)   64%  $  (553)     60%    $(1,286)    55%  $(1,401)    56%
Real estate mortgage                       9    (1)%     (46)      5%        (56)     2%     (101)     4%
Consumer                                (287)   37%     (329)     35%       (990)    43%   (1,019)    40%
- ------------------------------------------------------------------------------------------------------------
Net charge-offs                      $  (781)  100%  $  (928)    100%    $(2,332)   100%  $(2,521)   100%
- ------------------------------------------------------------------------------------------------------------
Annualized net charge-offs
 to average loans                             0.35%             0.47%              0.36%            0.44%
- ------------------------------------------------------------------------------------------------------------
Net charge-offs to average loans for the year ended
 December 31, 1998                                                                                  0.42%
- ------------------------------------------------------------------------------------------------------------


NONINTEREST INCOME
Table  4  below  presents   quarterly  and  year-to-date   noninterest   income.
Noninterest  income for the third quarter of 1999,  excluding security gains and
nonrecurring  income,  increased  $0.3  million or 10.8% when  compared to third
quarter of 1998. For the nine month period ended  September 30, 1999,  excluding
security  gains and  nonrecurring  income,  noninterest  income  increased  $0.7
million or 9.8% compared to the same period during 1998. Deposit service charges
has increased during 1999 as a result of growth in demand deposit accounts.  The
increase  in other  income  for the  quarter  and  year-to-date  periods  can be
primarily attributed to an increase in ATM transaction income.

                                      -15-




TABLE 4
NONINTEREST INCOME
- ------------------------------------------------------------------------------------------------------------------------
                                         First    Second      THIRD       NINE     Fourth     Twelve
(dollars in thousands)                 Quarter   Quarter    QUARTER     MONTHS    Quarter     Months
- ------------------------------------------------------------------------------------------------------------------------
                                                                            
1999
Trust income                            $  835    $  835     $  835     $2,505
Service charges on deposit accounts        961     1,059      1,088      3,108
Net securities gains                       471       199        837      1,507
Other income                               792       610        684      2,086
- ------------------------------------------------------------------------------------------------------------------------
  Total noninterest income              $3,059    $2,703     $3,444     $9,206
- ------------------------------------------------------------------------------------------------------------------------
1998
Trust income                            $  802    $  802     $  803     $2,407     $  708     $3,115
Service charges on deposit accounts        869       900        956      2,725      1,024      3,749
Net securities gains                       218       227        168        613         11        624
Other income                               679       610        594      1,883        608      2,491
- ------------------------------------------------------------------------------------------------------------------------
  Total noninterest income              $2,568    $2,539     $2,521     $7,628     $2,351     $9,979
- ------------------------------------------------------------------------------------------------------------------------


NONINTEREST EXPENSE AND OPERATING EFFICIENCY
Table 5 presents components of noninterest expense as well as selected operating
efficiency ratios.  Noninterest expense for the quarter ended September 30, 1999
experienced  a $0.4  million  increase  compared  to the  same  period  of 1998.
Noninterest  expense for the nine months ended September 30, 1999  experienced a
$0.7 million decrease compared to the same period of 1998.
     Equipment  expense for the nine months ended  September 30, 1999  increased
$0.2  million  compared  to the  same  period  of  1998.  This  increase  can be
attributed to computer  maintenance and depreciation  resulting from replacement
of computers for Year 2000 compliance, as well as the installation of additional
computers throughout the branch network.
     Other  operating  expense  for the nine  months  ended  September  30, 1999
experienced  a $1.1  million  decline  compared to the same  period in 1998.  In
addition to a decline in recurring  other  operating  expenses  during 1999, the
Company recognized a nonrecurring gain of $0.5 million on the sale of other real
estate owned.
     Two  important  operating  efficiency  measures  that the  Company  closely
monitors are the efficiency and expense ratios. The efficiency ratio is computed
as total noninterest  expense  (excluding  nonrecurring  charges) divided by net
interest income plus noninterest income (excluding net security gains and losses
and  nonrecurring  income).  The efficiency ratio improved to 54.6% in the third
quarter of 1999 from 56.7% for the same period of 1998.  This  improvement was a
result of the  increases  in net  interest and  noninterest  income  between the
reporting  periods.  The expense ratio is computed as total noninterest  expense
(excluding nonrecurring charges) less noninterest income (excluding net security
gains and losses and nonrecurring income) divided by average assets. The expense
ratio  improved to 2.2% for the third quarter 1999 from 2.3% for the same period
of 1998. The improvement in the expense ratio can be attributed to the increases
in noninterest income and average assets,  while at the same time experiencing a
minimal increase in noninterest expense.

                                      -16-




TABLE 5
NONINTEREST EXPENSE AND PRODUCTIVITY MEASUREMENTS
- ---------------------------------------------------------------------------------------------------
(dollars in thousands)                  First     Second     THIRD      NINE     Fourth    Twelve
1999                                  Quarter    Quarter   QUARTER    MONTHS    Quarter    Months
- ---------------------------------------------------------------------------------------------------
                                                                        
Salaries and employee benefits         $4,616     $4,525   $ 5,025   $14,166
Office supplies and postage               473        467       390     1,330
Occupancy                                 674        735       700     2,109
Equipment                                 621        687       666     1,974
Professional fees and outside services    567        586       857     2,010
Data processing and communications        910        968       965     2,843
Amortization of intangible assets         251        250       244       745
Other operating                           668        856     1,239     2,763
- ---------------------------------------------------------------------------------------------------
  Total noninterest expense            $8,780     $9,074   $10,086   $27,940
- ---------------------------------------------------------------------------------------------------
Efficiency ratio                        51.83%     53.16%    54.58%    53.22%
Expense ratio                            2.04%      2.10%     2.17%     2.11%
Average full-time equivalent
 employees                                486        486       489       487
Average assets per average
 full-time equivalent employee
 (millions)                            $  2.6     $  2.7   $   2.8   $   2.7
- ---------------------------------------------------------------------------------------------------
1998
Salaries and employee benefits         $4,687     $4,607   $ 4,920   $14,214    $ 4,988   $19,202
Office supplies and postage               500        465       441     1,406        506     1,912
Occupancy                                 686        695       656     2,037        806     2,843
Equipment                                 480        580       668     1,728        647     2,375
Professional fees and outside services    648        615       724     1,987        849     2,836
Data processing and communications        901        862       872     2,635        942     3,577
Amortization of intangible assets         291        271       255       817        253     1,070
Other operating                         1,209      1,444     1,171     3,824      1,489     5,313
- ---------------------------------------------------------------------------------------------------
  Total noninterest expense            $9,402     $9,539   $ 9,707   $28,648    $10,480   $39,128
- ---------------------------------------------------------------------------------------------------
Efficiency ratio                        56.67%     57.39%    56.71%    56.92%    60.84%     57.92%
Expense ratio                            2.23%      2.25%     2.27%     2.25%     2.49%      2.31%
Average full-time equivalent
 employees                                488        488       495       490        487       489
Average assets per average
 full-time equivalent employee
 (millions)                            $  2.6     $  2.6   $   2.6   $   2.6    $   2.7   $   2.6
- ---------------------------------------------------------------------------------------------------


INCOME TAXES
Income tax expense for the third quarter of 1999 was $3.2 million, compared with
$1.3 million for the third  quarter of 1998.  For the first nine months of 1999,
income tax expense  amounted to $9.0 million,  compared with $3.6 million during
the same  period of 1998.  The  increase  in  income  taxes  during  1999 can be
attributed to an approximate  $3.0 million tax benefit for the first nine months
of 1998  resulting  from a corporate  realignment.  The increased  income before
income taxes between  reporting  periods also  contributed  to the increased tax
expense.

                                      -17-


BALANCE SHEET
The following  table  highlights the changes in the balance sheet.  Since period
end  balances  can be  distorted by one day  fluctuations,  the  discussion  and
analysis  concentrates  on average  balances when  appropriate  to give a better
indication of balance sheet trends.



TABLE 6
AVERAGE BALANCES
- ---------------------------------------------------------------------------------------------------------------------
                                          Three months ended                 Nine months ended
                                             September 30,                      September 30,
(dollars in thousands)                  1999              1998             1999              1998
- ---------------------------------------------------------------------------------------------------------------------
                                                                            
Cash and cash equivalents         $   41,633        $   39,888       $   40,686        $   37,840
Securities available for
 sale, at fair value                 353,622           396,617          348,408           418,481
Securities held to maturity           39,795            36,738           35,941            36,387
Loans held for sale                    3,057             2,524            3,294             3,190
Loans                                894,754           783,951          858,937           762,338
Deposits                           1,068,906         1,031,618        1,043,439         1,031,842
Short-term borrowings                127,426           107,817          107,507           111,476
Long-term debt                        35,163            10,176           27,474             8,201
Stockholders' equity                 125,857           129,063          129,045           126,805
Assets                             1,366,912         1,286,579        1,317,448         1,285,576
Earning assets                     1,309,424         1,223,361        1,255,445         1,221,737
Interest bearing liabilities      $1,073,948        $1,011,954       $1,031,129        $1,021,920
- ---------------------------------------------------------------------------------------------------------------------


SECURITIES
Average total  securities  were $39.9 million less for the third quarter of 1999
than  for the same  period  of 1998.  During  the  third  quarter  of 1999,  the
securities  portfolio  represented  31.0% of average  earning assets compared to
35.0% for the third quarter of 1998. Average total securities for the nine month
period ended  September 30, 1999 were $70.5 million less than the same period of
1998.  Available for sale  securities are primarily U.S.  Governmental  agencies
guaranteed securities.  Held to maturity securities are obligations of the State
of New York political  subdivisions and do not include any direct obligations of
the State of New York. At September 30, 1999, the  composition of the securities
portfolio was 90% available for sale and 10% held to maturity.

LOANS
Average  loan volume for the three months  ended  September  30, 1999 was $110.8
million,  or 14.1%  greater than the third  quarter  1998.  This growth has been
present  in all loan  categories,  with  increases  in the  average  commercial,
consumer and  mortgage  portfolios  of $79.2  million,  $10.4  million and $21.2
million, respectively.
     The  Company  has  continued  to  experience  an increase in the demand for
commercial  loans,  primarily in the business  and real estate  categories.  The
increase in consumer  loans can be  attributed  to a rise in home equity  loans.
Emphasis on marketing and improved  product delivery has resulted in an increase
in the  mortgage  portfolio.  The  Company  does not engage in highly  leveraged
transactions or foreign lending activities.

NONPERFORMING ASSETS AND PAST DUE LOANS
Nonperforming  assets  consist of  nonaccrual  loans and other real estate owned
(OREO).  Loans are  generally  placed on nonaccrual  when  principal or interest
payments become ninety days past due, unless the loan is well secured and in the
process of collection. Loans may also be placed on nonaccrual when circumstances
indicate  that the borrower may be unable to meet the  contractual  principal or
interest payments.  OREO represents property acquired through foreclosure and is
valued  at the  lower of the  carrying  amount or fair  market  value,  less any
estimated disposal costs.
     Total  nonperforming  assets decreased $2.1 million,  or 38.8% at September
30, 1999 compared to September 30, 1998. The reduction in  nonperforming  assets
can be attributed to a decline in nonaccrual  loans, with reductions in all loan
type categories.  This is an indication of improvement in the Company's  overall
loan  quality.  The changes in  nonperforming  assets are  presented  in Table 7
below.


     At September 30, 1999,  the recorded  investment in impaired loans was $2.0
million. Included in this amount is $0.2 million of impaired loans for which the
specifically  allocated  allowance for loan loss is $0.1  million.  In addition,
included in impaired  loans is $1.8 million of impaired  loans that, as a result
of the  adequacy  of  collateral  values  and cash flow  analysis  do not have a
specific  reserve.  At December 31, 1998,  the recorded  investment  in impaired
loans  was  $2.4  million,  of  which  $1.1  million  had a  specific  allowance
allocation  of $0.2  million  and $1.3  million  for which there was no specific
reserve.  At September 30, 1998,  the recorded  investment in impaired loans was
$3.7 million, of which $1.1 million had a specific allowance  allocation of $0.2
million and $2.6  million of which there was no  specific  reserve.  The Company
classifies all commercial and small business nonaccrual loans as impaired loans.

                                      -18-




TABLE 7
NONPERFORMING ASSETS AND RISK ELEMENTS
- ------------------------------------------------------------------------------------------------------------
                                                      SEPTEMBER 30,        December 31,        September 30,
(in thousands)                                            1999                 1998                1998
- ------------------------------------------------------------------------------------------------------------
                                                                                      
Commercial and agricultural                         $2,002      72%     $2,394      67%     $3,684      75%
Real estate mortgage                                   309      11%        437      12%        523      11%
Consumer                                               481      17%        762      21%        695      14%
- ------------------------------------------------------------------------------------------------------------
   Total nonaccrual loans                            2,792     100%      3,593     100%      4,902     100%
- ------------------------------------------------------------------------------------------------------------
Other real estate owned                                585               1,164                 612
- ------------------------------------------------------------------------------------------------------------
   Total nonperforming assets                        3,377               4,757               5,514
- ------------------------------------------------------------------------------------------------------------
Loans 90 days or more past due and still accruing:
  Commercial and agricultural                           55      15%        291      25%        261      27%
  Real estate mortgage                                 125      33%        341      30%        303      32%
  Consumer                                             197      52%        526      45%        390      41%
- ------------------------------------------------------------------------------------------------------------
   Total                                               377     100%      1,158     100%        954     100%
- ------------------------------------------------------------------------------------------------------------
   Total assets containing risk elements            $3,754              $5,915              $6,468
- ------------------------------------------------------------------------------------------------------------
Total nonperforming assets to loans                           0.38%               0.58%               0.69%
Total assets containing risk elements to loans                0.42%               0.72%               0.81%
Total nonperforming assets to assets                          0.25%               0.37%               0.42%
Total assets containing risk elements to assets               0.27%               0.46%               0.50%
- ------------------------------------------------------------------------------------------------------------


DEPOSITS
Customer deposits represent the greatest source of funding assets. Average total
deposits for the quarter ended September 30, 1999,  increased $37.3 million,  or
3.6% from the same period in 1998.  This  growth has been  present in the demand
and savings  categories  with  increases  of $19.9  million  and $14.7  million,
respectively,  while average time deposits  remained  stable  between  reporting
periods.

BORROWED FUNDS
The Company's  borrowed  funds consist of  short-term  borrowings  and long-term
debt.  Short-term  borrowings  include federal funds purchased,  securities sold
under agreement to repurchase,  and other  short-term  borrowings  which consist
primarily of Federal Home Loan Bank (FHLB) advances with an original maturity of
one day up to one year. Long-term debt consists of fixed rate FHLB advances with
an original maturity greater than one year.  Average  borrowings for the quarter
ended  September 30, 1999 increased  $44.6 million,  or 37.8% as compared to the
same period of 1998.

CAPITAL AND DIVIDENDS
Stockholders'  equity  of  $127.9  million  represents  9.3% of total  assets at
September 30, 1999,  compared with $130.6 million, or 10.1% at December 31, 1998
and $132.5 million,  or 10.2% a year previous.  The decrease in equity is due to
depreciation in the market value of the securities  available for sale portfolio
resulting from the recent rise in market interest rates.
     In  December of 1998,  the Company  distributed  a 5% stock  dividend,  the
thirty-ninth  consecutive year a stock dividend has been declared.  In September
of 1999, the Company paid a regular  quarterly cash dividend of $0.17 per share,
equivalent to an annual dividend of $0.68 per share. The Company does not have a
target  dividend  payout  ratio,  rather the Board of  Directors  considers  the
Company's   earnings  position  and  earnings  potential  when  making  dividend
decisions.
     Capital  is an  important  factor in  ensuring  the  safety of  depositors'
accounts.  For both 1998 and 1997,  the  Company  earned  the  highest  possible
national  safety and soundness  rating from two national  bank rating  services,
Bauer Financial  Services and Veribanc,  Inc. Their ratings are based on capital
levels, loan portfolio quality and security portfolio strength.
     As the  capital  ratios  in Table 8  indicate,  the  Company  remains  well
capitalized.  Capital  measurements  are  significantly  in excess of regulatory
minimum  guidelines and meet the  requirements to be considered well capitalized
for all periods presented.  Tier 1 and risk-based capital ratios have regulatory
minimum  guidelines  of 3%,  4% and 8%  respectively,  with  requirements  to be
considered well capitalized of 5%, 6% and 10%, respectively.

                                      -19-




TABLE 8
CAPITAL MEASUREMENTS
- ------------------------------------------------------------------------------------------------------
                                                            First      Second      THIRD      Fourth
                                                          Quarter     Quarter    QUARTER     Quarter
- ------------------------------------------------------------------------------------------------------
                                                                                  
1999
Tier 1 leverage ratio                                        9.75%       9.51%      9.37%
Tier 1 capital ratio                                        14.87%      14.42%     14.39%
Total risk-based capital ratio                              16.12%      15.67%     15.64%
Cash dividends as a percentage of net income                43.93%      44.06%     43.97%
Per common share:
 Book value                                                $10.57      $10.27     $10.29
 Tangible book value                                       $ 9.98      $ 9.70     $ 9.74
- ------------------------------------------------------------------------------------------------------
1998
Tier 1 leverage ratio                                        9.19%       9.27%      9.36%       9.33%
Tier 1 capital ratio                                        15.30%      15.13%     14.95%      14.69%
Total risk-based capital ratio                              16.56%      16.38%     16.21%      15.94%
Cash dividends as a percentage of net income                30.33%      36.55%     38.61%      40.37%
Per common share:
 Book value                                                $10.02      $10.23     $10.58      $10.52
 Tangible book value                                       $ 9.36      $ 9.59     $ 9.96      $ 9.91
- ------------------------------------------------------------------------------------------------------


The accompanying  Table 9 presents the high, low and closing sales price for the
common  stock  as  reported  on the  NASDAQ  National  Market  System,  and cash
dividends  declared  per share of common  stock.  At September  30, 1999,  total
market  capitalization  of the  Company's  common stock was  approximately  $215
million  compared  to $290  million at  December  31,  1998 and $274  million at
September  30,  1998.  The  Company's  price  to book  value  ratio  was 1.68 at
September 30, 1999 and 2.07 a year  previous.  The per share market price was 11
times annualized earnings at September 30, 1999 and 15 times annualized earnings
at September 30, 1998.




TABLE 9
QUARTERLY COMMON STOCK AND DIVIDEND INFORMATION
- ---------------------------------------------------------------------------------------
                                                                                  Cash
                                                                             Dividends
Quarter Ending               High              Low             Close          Declared
- ---------------------------------------------------------------------------------------
                                                                    
1998
March 31                   $20.00           $16.79            $20.00            $0.122
June 30                     24.65            19.29             24.17             0.162
September 30                25.00            18.46             21.90             0.162
December 31                 25.50            20.71             23.38             0.170
- ---------------------------------------------------------------------------------------
1999
MARCH 31                   $24.50           $20.88            $20.88            $0.170
JUNE 30                     22.25            20.00             20.50             0.170
SEPTEMBER 30                21.94            17.25             17.31             0.170
- ---------------------------------------------------------------------------------------

                                      -20-


LIQUIDITY AND INTEREST RATE SENSITIVITY MANAGEMENT
The primary objectives of asset and liability  management are to provide for the
safety of depositor and investor funds, assure adequate liquidity,  and maintain
an appropriate  balance between interest  sensitive  earning assets and interest
bearing liabilities.  Liquidity management involves the ability to meet the cash
flow  requirements of customers who may be depositors  wanting to withdraw funds
or borrowers  needing  assurance that sufficient funds will be available to meet
their  credit  needs.  The  Asset/Liability   Management   Committee  (ALCO)  is
responsible for liquidity  management and has developed  guidelines  which cover
all  assets  and  liabilities,  as well as off  balance  sheet  items  that  are
potential  sources  or  uses of  liquidity.  Liquidity  must  also  provide  the
flexibility  to  implement   appropriate   strategies   and  tactical   actions.
Requirements  change as loans grow, deposits and securities mature, and payments
on borrowings  are made.  Interest rate  sensitivity  management  seeks to avoid
widely  fluctuating net interest  margins and to ensure  consistent net interest
income through periods of changing economic conditions.
     The  Company's  primary  measure of liquidity is called the basic  surplus,
which  compares the adequacy of cash sources to the amounts of volatile  funding
sources.  This approach  recognizes the  importance of balancing  levels of cash
flow  liquidity from short and long-term  securities  with the  availability  of
dependable borrowing sources. Accordingly, the Company has established borrowing
agreements with other banks (Federal  Funds),  the Federal Home Loan Bank of New
York (short and long-term borrowings which are denoted as advances),  repurchase
agreements and broker deposit agreements with major brokerage firms.
     At September  30, 1999 and 1998,  the Company's  basic surplus  ratios (net
access to cash and secured  borrowings  as a  percentage  of total  assets) were
approximately 4% and 7%, respectively.  The Asset/Liability Management Committee
has determined that liquidity is adequate to meet the cash flow  requirements of
the Company.
     Interest rate risk is determined by the relative  sensitivities  of earning
asset yields and interest bearing  liability costs to changes in interest rates.
The method by which banks evaluate interest rate risk is to look at the interest
sensitivity gap, the difference  between interest  sensitive assets and interest
sensitive liabilities  repricing during the same period,  measured at a specific
point in time.  Through  analysis of the interest  sensitivity  gap, the Company
attempts to position its assets and  liabilities to maximize net interest income
in several  different  interest rate  scenarios.  As of September 30, 1999,  the
interest  sensitivity  gap indicates that the Company is liability  sensitive in
the short term.
     While the static gap evaluation of interest rate sensitivity is useful,  it
is not  indicative of the impact of  fluctuating  interest rates on net interest
income. Once the Company determines the extent of gap sensitivity, the next step
is to quantify the potential impact of the interest  sensitivity on net interest
income.  The  Company  utilizes a  simulation  model which  measures  the effect
certain  assumptions  will have on net  interest  income over a short  period of
time, usually one or two years. These assumptions  include,  but are not limited
to prepayments,  potential call options of the investment  portfolio and various
interest  rate  environments.  The  following  table  presents the impact on net
interest income of a gradual twelve-month increase or decrease in interest rates
compared to a stable  interest rate  environment.  The  simulation  projects net
interest  income over the next year using the  September  30, 1999 balance sheet
position.




 TABLE 10
 INTEREST RATE SENSITIVITY ANALYSIS
- ---------------------------------------------------------------
 Change in interest rates                    Percent change in
 (in basis points)                         net interest income
- ---------------------------------------------------------------
                                                     
 +200                                                   (5.15%)
 +100                                                   (2.72%)
 -100                                                    1.68%
 -200                                                    2.71%
- ---------------------------------------------------------------


                                      -21-



- ------------------------------------------------------------------------------------------------------------------------------------
SELECTED FIVE YEAR DATA                            1998          1997           1996           1995            1994
- ------------------------------------------------------------------------------------------------------------------------------------
(dollars in thousands, except per share data)

                                                                                          
Net income                                   $   19,102    $   14,749     $   12,179     $    9,329      $    6,508

Return on average assets                           1.48%         1.20%          1.10%          0.90%           0.64%

Return on average equity                          14.93%        12.97%         11.80%          9.18%           6.53%

Net interest margin                                4.76%         4.67%          4.69%          4.43%           4.81%

Efficiency ratio                                  57.92%        56.09%         60.74%         65.92%          70.22%

Expense ratio                                      2.31%         2.20%          2.41%          2.51%           2.96%

Tier 1 leverage ratio                              9.33%         8.91%          8.70%          8.80%           9.05%

Tier 1 risk-based capital ratio                   14.69%        14.88%         14.06%         15.21%          16.09%

Total risk-based capital ratio                    15.94%        16.13%         15.31%         16.46%          17.35%

Cash dividend per share payout                    41.34%        37.91%         36.50%         42.61%          56.13%

Earnings per share:
 Basic                                       $     1.52    $     1.18     $     0.98     $     0.72      $     0.50
 Diluted                                     $     1.49    $     1.16     $     0.97     $     0.72      $     0.50

Cash dividends paid                          $     0.616   $     0.442    $     0.355    $     0.307     $     0.277

Book value                                   $    10.52    $     9.77     $     8.65     $     8.47      $     7.56

Tangible book value                          $     9.91    $     9.09     $     7.84     $     7.56      $     6.81

Stock dividends distributed                        5.00%         5.00%          5.00%          5.00%           5.00%

Market price:
 High                                        $    25.50    $    19.78     $    12.93     $    11.66      $    10.88
 Low                                         $    16.79    $    11.99     $    10.21     $     9.72      $     8.82
 End of year                                 $    23.38    $    19.29     $    12.25     $    11.34      $    10.18

Price/earnings ratio (assumes dilution)           15.69X        16.56x         12.59x         15.73x          20.49x
Price/book value ratio                             2.22X         1.97x          1.42x          1.34x           1.35x

Total assets                                 $1,290,009    $1,280,585     $1,138,986     $1,106,266      $1,044,557

Total stockholders' equity                   $  130,632    $  123,343     $  106,264     $  108,044      $   98,307

Average diluted common shares
 outstanding (thousands)                         12,832        12,700         12,514         12,936          13,140
- ------------------------------------------------------------------------------------------------------------------------------------


All share and per share data has been  restated  to give  retroactive  effect to
stock dividends and splits.

                                      -22-


PART II.  OTHER INFORMATION

Item  1 -- Legal Proceedings

This item is omitted, as there have been no material legal proceedings initiated
or settled during the quarter ended September 30, 1999.

Item  2 -- Changes in Securities

Not Applicable

Item  3 -- Defaults Upon Senior Securities

This item is omitted because there were no defaults upon the Registrant's senior
securities during the quarter ended September 30, 1999.

Item  4 -- Submission of Matters to a Vote of Security Holders

This item is omitted as there is no  disclosure  required for the quarter  ended
September 30, 1999.

Item  5 -- Other Information

Not Applicable

Item  6 -- Exhibits and Reports on FORM 8-K

An index to exhibits follows the signature page of this FORM 10-Q.

During the third  quarter  ended  September  30,  1999,  the  Company  filed the
following Current Reports on Form 8-K:

(1)    A report dated August 19, 1999 stating that NBT Bancorp  Inc. and Lake
       Ariel Bancorp,  Inc.  announced  that they had entered into an Agreement
       and Plan of Merger, dated as of August 16, 1999.

(2)    A report dated September 13, 1999 describing organizational changes
       within the Company.

                                      -23-

                                   SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
Registrant  has duly  caused this report on FORM 10-Q to be signed on its behalf
by the undersigned thereunto duly authorized, this 12th day of November, 1999.




                                NBT BANCORP INC.



                            By: /S/ DARYL R. FORSYTHE
                                Daryl R. Forsythe
                                  President and
                             Chief Executive Officer







                                INDEX TO EXHIBITS

The  following  documents  are  attached  as  Exhibits  to this FORM 10-Q or, if
annotated  by the  symbol  *, are  incorporated  by  reference  as  Exhibits  as
indicated by the page number or exhibit  cross-reference to the prior filings of
the Registrant with the Commission.




FORM 10-Q
Exhibit                                                                                  Exhibit
NUMBER                                                                                   CROSS-REFERENCE
- ------                                                                                   ---------------
                                                                                   
27.1        Financial Data Schedule for the nine months ended September 30, 1999         Herein



                                      -25-





                                  EXHIBIT 27.1
                FINANCIAL DATA SCHEDULE FOR THE NINE MONTHS ENDED
                               SEPTEMBER 30, 1999