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 Upper
Mississippi River Restoration -
Environmental Management Program
Peoria Lake
Habitat Rehabilitation and
Enhancement Project
Peoria Pool, Illinois Waterway River Miles 162.0 - 181.0
Peoria and Woodford Counties, Illinois
 Sedimentation
has destroyed much of the fish and wildlife habitat
value of Peoria Lake. The lake has lost
approximately 68% of its volume and average depth
has been reduced from 8.1 to 2.6 feet since 1903.
The shallow depths promote re-suspension of
sediments, resulting in elevated turbidity levels.
The soft lake bottom is not receptive to the rooting
and survival of aquatic plants.
The barrier island has impeded wave action on a portion of the
lake, thereby reducing sediment re-suspension and turbidity. The
improved water quality has not stimulated the growth of
submergent and emergent aquatic vegetation on the lee side of
the island. Migratory waterfowl have benefited from the reliable
food resources and loafing areas that a forested wetland
management unit provides. Removal of the East River channel silt
plug and dredging an access channel has created additional
shoreline and restored flowing side channel habitat, rare along
the Illinois Waterway.
Project Data
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Approximate Acres:
168 acres forested wetland; 1 mile long barrier island;
9,500-foot-long flowing side channel (Source: Operations &
Maintenance Manual)
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Congressional District:
Illinois - 18
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State(s) Covered:
Illinois
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Land Ownership:
Illinois Department of Natural Resources
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Management Agency:
Illinois Department of Natural Resources
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Management Authority:
State Law
Milestones*
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The Definite Project Report was completed in 1990
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Project construction was initiated in 1993. The
contracts for the Stage I - Forested Wetland Management
Area, the Stage II - Barrier Island and East River
Enhancement, and the re-vegetation contract were completed
by July 1996
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A final contract to create an underwater weir (rock closure
structure) was awarded and completed in September 1997
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The Operation and Maintenance Manual was completed in 1998
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The Initial Performance Evaluation Report (PER) was
completed in March 2001. A PER update was completed
and distributed in May 2002
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Performance monitoring is ongoing
* Milestones updated March 2004
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