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(b) MAINTENANCE.—Following execution of the part-
nership agreement referred to in subsection (a), the Sec-
retary may carry out maintenance of the project referred 
to in subsection (a) on an annual basis. 
SEC. 3049. CACHE RIVER LEVEE, ILLINOIS. 
The Cache River Levee portion of the project for 
flood control, Cache River, Illinois, authorized by the Act 
of June 28, 1938 (52 Stat. 1215), is modified to add envi-
ronmental restoration as a project purpose. 
SEC. 3050. CHICAGO RIVER, ILLINOIS. 
The navigation channel for the North Branch Canal 
portion of the Chicago River, authorized by the first sec-
tion of the Rivers and Harbors Appropriations Act of 
March 3, 1899 (30 Stat. 1129), extending from Bridge 
10 to the South/North Branch confluence is modified to 
be 105 feet wide. 
SEC. 3051. CHICAGO SANITARY AND SHIP CANAL, ILLINOIS. 
(a) EXISTING BARRIER.—The Secretary shall up-
grade and make permanent, at Federal expense, the exist-
ing Chicago Sanitary and Ship Canal Dispersal Barrier 
Chicago, Illinois, constructed as a demonstration project 
under section 1202(i)(3) of the Nonindigenous Aquatic 
Nuisance Prevention and Control Act of 1990 (16 U.S.C. 
4722(i)(3)).
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(b) OPERATION AND MAINTENANCE.—The barrier 
referred to in subsection (a) and the barrier in the Chicago 
Sanitary and Ship Canal being constructed under section 
1135 of the Water Resources Development Act of 1986 
(33 U.S.C. 2309a) shall be operated and maintained, at 
Federal expense, as a system in a manner to optimize ef-
fectiveness. Operation and maintenance includes inves-
tigating and eliminating potential pathways that may 
allow aquatic species in the Des Plaines River and Illinois 
and Michigan Canal to bypass the barriers in the Chicago 
Sanitary and Ship Canal. 
(c) FEASIBILITY STUDY.—The Secretary, in con-
sultation with appropriate Federal, State, local, and non-
governmental entities, shall conduct a feasibility study, at 
Federal expense, of the range of options and technologies 
available to prevent the spread of aquatic species between 
the Great Lakes and Mississippi River Basins through the 
Chicago Sanitary and Ship Canal and other pathways. 
SEC. 3052. EMIQUON, ILLINOIS. 
(a) MAXIMUM AMOUNT.—The maximum amount of 
Federal funds that may be expended for the project for 
aquatic ecosystem restoration, Emiquon, Illinois, being 
carried out under section 206 of the Water Resources De-
velopment Act of 1996 (33 U.S.C. 2330), shall be 
$7,500,000.
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(b) LIMITATION.—Nothing in this section shall affect 
the eligibility of the project for emergency repair assist-
ance under section 5(a) of the Act entitled ‘‘An Act au-
thorizing the construction of certain public works on rivers 
and harbors for flood control, and for other purposes’’, 
approved August 18, 1941 (33 U.S.C. 701n). 
SEC. 3053. LASALLE, ILLINOIS. 
In carrying out section 312 of the Water Resources 
Development Act of 1990 (104 Stat. 4639–4640), the Sec-
retary shall give priority to work in the vicinity of LaSalle, 
Illinois, on the Illinois and Michigan Canal. 
SEC. 3054. SPUNKY BOTTOMS, ILLINOIS. 
(a) PROJECT PURPOSE.—The project for flood con-
trol, Spunky Bottoms, Illinois, authorized by section 5 of 
the Flood Control Act of June 26, 1936 (35 Stat. 1584), 
is modified to add environmental restoration as a project 
purpose. 
(b) MAXIMUM AMOUNT.—The maximum amount of 
Federal funds that may be expended for the project for 
improvement of the quality of the environment, Spunky 
Bottoms, Illinois, being carried out under section 1135 of 
the Water Resources Development Act of 1986 (33 U.S.C. 
2309a), shall be $7,500,000. 
(c) LIMITATION.—Nothing in this section shall affect 
the eligibility of the project for emergency repair assist-