SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                         POST EFFECTIVE AMENDMENT NO. 16
                     TO REGISTRATION STATEMENT NO. 33-48701

                                   ON FORM S-1

                                      Under

                           The Securities Act of 1933

  RiverSource Life Insurance Company (previously IDS Life Insurance Company)
- --------------------------------------------------------------------------------
               (Exact name of registrant as specified in charter)

                                    Minnesota
- --------------------------------------------------------------------------------
         (State or other jurisdiction of incorporation or organization)


                                   41-0823832
- --------------------------------------------------------------------------------
                      (I.R.S. Employer Identification No.)

            70100 Ameriprise Financial Center, Minneapolis, MN 55474
                                 (800) 862-7919
- --------------------------------------------------------------------------------
               (Address, including zip code, and telephone number,
                 including area code, of registrant's principal
                               executive offices)

                               Rodney J. Vessels
  RiverSource Life Insurance Company (previously IDS Life Insurance Company)
         50607 Ameriprise Financial Center, Minneapolis, Minnesota 55474
                                 (612) 671-2237
- --------------------------------------------------------------------------------
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

It is proposed that this filing become effective on May 1, 2007.

If any of the  securities  being  registered on this Form are to be offered on a
delayed or continuous  basis  pursuant to Rule 415 under the  Securities  Act of
1933, check the following box. [X]



                                                 Calculation of Registration Fee


                                                                                 PROPOSED MAXIMUM
TITLE OF EACH CLASS OF SECURITIES     AMOUNT TO BE      PROPOSED MAXIMUM         AGGREGATE OFFERING      AMOUNT OF
TO BE REGISTERED                      REGISTERED        OFFERING PRICE PER UNIT  PRICE                   REGISTRATION FEE
- ------------------------------------- ----------------- ------------------------ ----------------------- -------------------
                                                                                             
Interests in the Fixed Account of           N/A
the Group, Unallocated Deferred
Combination Fixed/Variable Annuity
Contracts for Qualified Retirement
Plans




                                     PART I.

                       INFORMATION REQUIRED IN PROSPECTUS

The prospectus for RiverSource Life Group Variable Annuity Contract is
incorporated by reference from Part A of Post-Effective Amendment No. 18 to
Registration Statement No. 33-47302, filed on or about April 24, 2007.



                                    PART II.

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 13. Other Expenses of Issuance and Distribution

         The expenses of the issuance and distribution of the interests in the
Fixed Account of the Contract to be registered, other than commissions on sales
of the Contracts, are to be borne by the registrant.

Item 14. Indemnification of Directors and Officers

The amended and restated By-Laws of the depositor provide that the depositor
will indemnify, to the fullest extent now or hereafter provided for or permitted
by law, each person involved in, or made or threatened to be made a party to,
any action, suit, claim or proceeding, whether civil or criminal, including any
investigative, administrative, legislative, or other proceeding, and including
any action by or in the right of the depositor or any other corporation, or any
partnership, joint venture, trust, employee benefit plan, or other enterprise
(any such entity, other than the depositor, being hereinafter referred to as an
"Enterprise"), and including appeals therein (any such action or process being
hereinafter referred to as a "Proceeding"), by reason of the fact that such
person, such person's testator or intestate (i) is or was a director or officer
of the depositor, or (ii) is or was serving, at the request of the depositor, as
a director, officer, or in any other capacity, or any other Enterprise, against
any and all judgments, amounts paid in settlement, and expenses, including
attorney's fees, actually and reasonably incurred as a result of or in
connection with any Proceeding, except as provided below.

No indemnification will be made to or on behalf of any such person if a judgment
or other final adjudication adverse to such person establishes that such
person's acts were committed in bad faith or were the result of active and
deliberate dishonesty and were material to the cause of action so adjudicated,
or that such person personally gained in fact a financial profit or other
advantage to which such person was not legally entitled. In addition, no
indemnification will be made with respect to any Proceeding initiated by any
such person against the depositor, or a director or officer of the depositor,
other than to enforce the terms of this indemnification provision, unless such
Proceeding was authorized by the Board of Directors of the depositor. Further,
no indemnification will be made with respect to any settlement or compromise of
any Proceeding unless and until the depositor has consented to such settlement
or compromise.

The depositor may, from time to time, with the approval of the Board of
Directors, and to the extent authorized, grant rights to indemnification, and to
the advancement of expenses, to any employee or agent of the depositor or to any
person serving at the request of the depositor as a director or officer, or in
any other capacity, of any other Enterprise, to the fullest extent of the
provisions with respect to the indemnification and advancement of expenses of
directors and officers of the depositor.

Insofar as indemnification for liability arising under the Securities Act of
1933 (the "Act") may be permitted to directors, officers and controlling persons
of the depositor or the registrant pursuant to the foregoing provisions, or
otherwise, the registrant has been advised that in the opinion of the Securities
and Exchange Commission such indemnification is against public policy as
expressed in the Act and is, therefore, unenforceable. In the event that a claim
for indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or controlling
person of the registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.

Item 15. Recent Sales of Unregistered Securities

         Not Applicable



Item 16. (a) Exhibits

1.       Form of Principle Underwriter Agreement for RiverSource Life
         Insurance Company Variable Annuities and Variable Life Insurance
         filed electronically as Exhibit 3.1 with the Registration Statement
         on Form N-4 for RiverSource Variable Annuity Account (previously
         American Enterprise Variable Annuity Account), RiverSource
         Signature(SM) Select Variable Annuity and RiverSource Signature(SM)
         Variable Annuity, on or about Jan. 2, 2007, is incorporated by
         reference.

2.1      Articles of Merger of IDS Life Insurance Company and American
         Enterprise Life Insurance Company dated March 16, 2006, filed
         electronically as Exhibit 2.1 to Post-Effective Amendment No. 8 to
         Registration Statement No. 333-114888, is incorporated herein by
         reference.

2.2      Articles of Merger of IDS Life Insurance Company and American
         Partners Life Insurance Company dated March 17, 2006, filed
         electronically as Exhibit 2.2 to Post-Effective Amendment No. 8 to
         Registration Statement No. 333-114888, is incorporated herein by
         reference.

3.1      Copy of Certificate of Incorporation of IDS Life Insurance Company
         dated July 23, 1957, filed electronically as Exhibit 3.1 to
         Post-Effective Amendment No. 2 to Registration Statement No. 33-48701
         is incorporated by reference.

3.2      Copy of Amended and Restated By-laws of IDS Life Insurance Company,
         filed electronically as Exhibit 6.2 to Post-Effective Amendment No. 13
         to Registration Statement No. 33-47302 is incorporated by reference.

3.3      Copy of Amended and Restated By-Laws of RiverSource Life Insurance
         Company filed electronically as Exhibit 27(f)(3) to Post-Effective
         Amendment No. 22 to Registration Statement No. 333-44644 is
         incorporated by reference.

4.       Form of Group Deferred Variable Annuity Contract, Form 34660, filed
         electronically as Exhibit 4.1 to Post-Effective Amendment No. 2 to
         Registration Statement No. 33-48701 is incorporated by reference.

5.       Opinion of Counsel  regarding  legality  of  Contracts  is filed
         electronically herewith.

6.-20.   Not Applicable.

21.      Copy of List of Subsidiaries, filed electronically as Exhibit 22 to
         Post-Effective Amendment No. 5 to Registration Statement No. 33-48701
         is incorporated by reference.

22.      Not Applicable.

23.      Consent of Independent Registered Public Accounting Firm is filed
         electronically herewith.

24.      Power of Attorney to sign Amendments to this Registration Statement,
         dated Jan. 2, 2007, is filed electronically herewith.

25.-99.  Not Applicable.


Item 17. Undertakings

A.  Registrant hereby undertakes:

         (1)      To file, during any period in which offers or sales are being
                  made, a post-effective amendment to this registration
                  statement:

                  (i)   To include any prospectus  required by section  10(a)(3)
                        of the Securities Act of 1933,

                  (ii)  To reflect in the prospectus any facts or events arising
                        after the effective date of the registration statement
                        (or the most recent post-effective amendment thereof
                        which, individually or in the aggregate, represent a
                        fundamental change in the information set forth in the
                        registration statement,

                  (iii) To include any material information with respect to the
                        plan of distribution not previously disclosed in the
                        registration statement or any material change to such
                        information in the registration statement,

         (2)      That, for the purpose of determining any liability under the
                  Securities Act of 1933, each such post-effective amendment
                  shall be deemed a new registration statement relating to the
                  securities offered therein, and the offering of such
                  securities at that time shall be deemed to be the initial bona
                  fide offering thereof,

         (3)      that all post-effective amendments will comply with the
                  applicable forms, rules and regulations of the Commission in
                  effect at the time such post-effective amendments are filed,
                  and

         (4)      To remove from registration by means of a post-effective
                  amendment any of the securities being registered which remain
                  unsold at the termination of the offering.

B.  The Registrant represents that it is relying upon the no-action assurance
    given to the American Council of Life Insurance (pub. avail. Nov. 28,
    1988). Further, the Registrant represents that it has complied with the
    provisions of paragraphs (1) - (4) of the no-action letter.



                                   SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the Registrant,
RiverSource Life Insurance Company (previously IDS Life Insurance Company),
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized in the City of Minneapolis, and State
of Minnesota on the 24th day of April, 2007.

                                         RiverSource Life Insurance Company
                                         (previously IDS Life Insurance Company)
                                         --------------------------
                                         (Registrant)


                                         By /s/ Timothy V. Bechtold*
                                           -------------------------
                                                Timothy V. Bechtold
                                                President


Pursuant to the requirements of the Securities Act of 1933, this Registration
Statement has been signed by the following persons in the capacities indicated
on the 24th day of April, 2007.

Signature                                Title

/s/  Gumer C. Alvero*                    Director and Executive Vice
- ------------------------------------     President - Annuities
     Gumer C. Alvero

/s/  Timothy V. Bechtold*                Director and President
- ------------------------------------
     Timothy V. Bechtold

/s/  Brian J. McGrane*                   Director, Executive Vice President
- ------------------------------------     and Chief Financial Officer
     Brian J. McGrane

/s/  Kevin E. Palmer*                    Director, Vice President
- ------------------------------------     and Chief Actuary
     Kevin E. Palmer

/s/  Mark E. Schwarzmann*                Chairman of the Board and
- ------------------------------------     Chief Executive Officer
     Mark E. Schwarzmann                 (Chief Executive Officer)

/s/  Bridget M. Sperl*                   Executive Vice President -
- ------------------------------------     Client Services
     Bridget M. Sperl

/s/  David K. Stewart*                   Vice President and Controller
- ------------------------------------     (Principal Accounting Officer)
     David K. Stewart

*   Signed pursuant to Power of Attorney dated Jan. 2, 2007 filed
    electronically herewith as Exhibit 24, by:


/s/ Rodney J. Vessels
- ------------------------------------
    Rodney J. Vessels
    Assistant General Counsel