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MVN-2022-00378-WKK

CEMVN-RGW
Published May 5, 2025
Expiration date: 5/25/2025
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APPLICANT: Warren Abadie
Lafayette Consolidated Government (LCG)
1515 East University Avenue
Lafayette, Louisiana 70501

AGENT: Jarrod Grandon
Tim Morton and Associates
500 South Morgan Boulevard
Lafayette, Louisiana 70518

LOCATION OF WORK: The project would affect waters of the United States associated with Coulee Ile Des Cannes. The project/review area is located on the north side of Duhon Road, at Latitude North: 30.173453°N and Longitude West: -92.107877°W in Lafayette, Lafayette Parish, Louisiana.

The work described below was partially completed prior to obtaining a Department of the Army permit and was in violation of Section 301 of the Clean Water Act. All legal issues concerning the unauthorized work have since been deferred.

PROJECT PURPOSE:

Basic: Drainage Improvements

Overall: The four detention ponds and outfall structures would reduce flooding to local citizens living upstream and downstream along Coulee Ile Des Cannes.

DESCRIPTION OF WORK: The applicant requests authorization to construct four detention ponds.

Pond 1

Pond 1 required 721,699 cubic yards of excavation of 27 acres and has an outfall and weir system to a lateral of Coulee Isle Des Cannes. The outfall structure will consist of a 110-foot long 24-inch diameter storm drainpipe with a concrete apron at the pond collection point and a flap gate on the coulee lateral point (See exhibit 4). The weir system will consist of a trapezoidal shaped channel with 212 cubic yards of revetment connecting pond 1 to a lateral of Coulee Ile Des Cannes (See exhibit 2).

Pond 2

Pond 2 required 25,004 cubic yards of excavation of 2.26 acres and has an outfall and a weir system to a lateral of Coulee Ile Des Cannes. The outfall structure will consist of a 84-foot long 24-inch diameter storm drainpipe with a concrete apron at the pond collection point and a flap gate on the coulee lateral point (See exhibit 5). The weir system will consist of a trapezoidal shaped channel with 48 cubic yards of revetment connecting pond 2 to a lateral of Coulee Ile Des Cannes (See exhibit 2).

Pond 3

Pond 3 required 1,445,984 cubic yards of excavation of 41.14 acres and has inlet pipes, and an outfall directly into Coulee Ile Des Cannes. The inlet pipe consists of two 112-foot long 48-inch diameter storm drainpipes that re-routed 1,622 linear feet of an existing ditch (See exhibit 8). A flood control structure and a weir system will be used to release water directly into Coulee Ile Des Cannes. The drainage control structure (See exhibit 6) will consist of a 100-foot long 24-inch diameter storm drainpipe with a concrete apron at the pond collection point and a flap gate on the Coulee Ile Des Cannes point. The weir system will consist of a trapezoidal shaped channel with 219 cubic yards of revetment connecting pond 3 to Coulee Ile Des Cannes (See exhibit 3).

Pond 4

Pond 4 required 154,239 cubic yards of excavation of 6.35 acres and has an outfall directly into Coulee Ile Des Cannes. A flood control structure and a weir system will be used to release water directly into Coulee Ile Des Cannes. The drainage control structure (See exhibit 7) will consist of a 160-foot long 24-inch diameter storm drainpipe with a concrete apron at the pond collection point and a 11.7 cubic yards of revetment on the Coulee Ile Des Cannes point. The weir system will consist of a trapezoidal shaped channel with 118 cubic yards of revetment connecting pond 3 to Coulee Ile Des Cannes (See exhibit 3).

Related Story: Public Notice and Drawings