Spire 8K Regulation FD Disclosure | SR 11 Mar 09

Exhibit 99.1

Company Overview

• Strong utility platform

• Public utility holding
company formed 2001

• Growth components
complementary to core

• Demonstrated strategic
execution

• S&P Small Cap 600
Company

Natural Gas Industry

Execution

• Six consecutive years of record earnings

– Acquisition and organic growth

• Utility operations

– Strong regulatory execution

– Operational improvements

– Stability of earnings

• Non-utility components

– Logical extension of core utility business

– Continued growth of Laclede Energy Resources
(LER)

– Developed and sold SM&P Utility Resources, Inc.

– Ongoing systematic evaluation of new opportunities

• Experienced management

Our System & Strengths

• Largest LDC in Missouri

– 630,000 Customers (83%
market saturation)

– Over 16,000 miles of pipe

• Diversified gas supply

• Significant storage
capacity

– Market area: ≈5 Bcf
natural gas, ≈3 Bcfe liquid
propane

– Upstream system: 23 Bcf

Upstream Pipeline Transportation Network

Regulation and Rate Design

• Missouri Public Service Commission

• Rate design largely decoupled

– Mitigates exposure to weather and customer
conservation

– Shifts recovery from usage to customer charge

• Infrastructure System Replacement Surcharge
(ISRS)

– Allows recovery between rate cases of facility-related
expenditures

– Recovers depreciation, property taxes, and rate of
return

• Long-established Purchased Gas Adjustment
(PGA) clause

Advocacy

• Missouri Energy Development Association
(MEDA)

– Missouri investor-owned natural gas, electric, and
water utilities

• Advocates measures to support utility infrastructure and
services to benefit Missouri citizens and businesses

– Current Chairman

– Legislative achievements

• Infrastructure System Replacement Surcharge

• Fuel Adjustment Clause for Electric Utilities

• Weather and Conservation Rider

• Environmental Cost Recovery Mechanism

– Missouri Utility Shareholders Association

Operational and Customer Focus

Laclede Energy Resources

• Non-regulated natural
gas marketer

– Organically grown

– Large retail and wholesale
customer base

– Flexible pricing
alternatives

– Risk management utilizing
financial markets

• Lock in margins

– Experienced management

• Mostly long-term, firm
transport

• Major markets

– Perryville Hub - 240,000
Dth/D

– St. Louis - 60,000 Dth/D

• Provides arbitrage
opportunities between PRVL,
Ozark, Tetco and NGPL
pipelines

• Provides diversity in supply
basins to enhance overall
delivery reliability

Core Transport Capacity

Centerpoint Energy

• Long-term firm transport at
discounted rates

• Significant flexibility on
receipts and deliveries

• Integrates well with
Centerpoint capacity
delivering gas to PRVL Hub
and St. Louis for significant
arbitrage opportunities

• Provides redundancy of
supply choices to enhance
overall delivery reliability

Core Transport Capacity

Trunkline Gas Co.

Laclede Energy Resources

• Strong performance

– 15% increase in 2008 sales volumes over 2007

– 2008 volumes delivered similar to Laclede Gas Company (123
Bcf vs. 108 Bcf)

– Quarter ended December 2008 strongest in history

• 160% increase in net income over quarter ended December 2007

• Growth in overall portfolio

– Additional long-term transportation capacity and gas supplies

– Increased number of counterparties

• Growth in sales base

– New retail / wholesale customers

– Producer services

– Customer asset management

85% of Business Activity

99% of Business Activity

Current LER Footprint

Drivers of Growth

• Pipeline expansion projects

– Additional marketing opportunities

• Storage expansion

• Growing gas supply basins

– Shale plays

• Producer services

• Additional markets

– Power generation

– LDCs

Growth Potential

Laclede Pipeline Company

• Uniquely situated LPG
pipeline

– Market crossroads location

– Only U.S. interstate LPG
pipeline with LDC customer

• FERC jurisdiction

– Allows transport of various
liquids

– Creates opportunity to
grow customer base
beyond Laclede Gas

– Preserves historic role re:
Laclede Gas Company
peaking needs

Rocky Mts

LNG

Canadian Gas

Reduction

Marcellus Shale

Supply Shift

Strategic Storage Opportunities

• Assessing and evaluating natural gas
storage assets

• Thoughtful, disciplined approach

• Opportunity for sustainable, long term
growth

	Laclede Group	Laclede Gas FMB	Laclede Gas CP
S&P	A	A	A-1
Moody’s		A3	P-2
Fitch	A-	A+	F1

Strong Credit Ratings and Liquidity

Liquidity and Financial Capacity

• Standing lines of credit

– Laclede Group: $ 50.0 MM

– Laclede Gas: $320.0 MM

• Seasonal lines of credit

– Laclede Gas: $ 75.0 MM

• Recent bond issue

– $80 MM of 6.35%, callable after 5 years, 30-year First
Mortgage Bonds issued September 2008

Earnings by Segment ($MM)

Net Income ($MM)

	2006	2007	2008
Operating Cash Flow from Continuing Operations (excluding Working Capital)	$ 78.5	$ 81.9	$ 96.1
Dividends Paid	(29.8)	(31.2)	(32.4)
Capital Expenditures - Continuing Operations	(58.5)	(56.4)	(55.4)
Free Cash Flow	$ (9.8)	$ (5.7)	$ 8.3
% of Capital Expenditures Internally Generated	83%	90%	115%