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US Army Corps of Engineers

Tulsa District Website

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Public Notices by Year

Tulsa District Regulatory Permits for Public Comment

PURPOSE: The purpose of these public notices are to inform you of a proposal for work in which you might be interested and to solicit your comments and information to better enable us to make a reasonable decision on factors affecting the public interest.

SECTION 10: The U.S. Army Corps of Engineers is directed by Congress through Section 10 of the Rivers and Harbors Act of 1899 (33 USC 403) to regulate all work or structures in or affecting the course, condition, or capacity of navigable waters of the United States. The intent of this law is to protect the navigable capacity of waters important to interstate commerce.

SECTION 404: The U.S. Army Corps of Engineers is directed by Congress through Section 404 of the Clean Water Act (33 USC 1344) to regulate the discharges of dredged and fill material into all waters of the United States. These waters include lakes, rivers, streams, mudflats, sandflats, sloughs, wet meadows, natural ponds, and wetlands adjacent to other waters. The intent of the law is to protect these waters from the indiscriminate discharge of material capable of causing pollution and to restore and maintain their chemical, physical, and biological integrity.

U.S. Army Corps of Engineers, Tulsa District

Regulatory Office, Chief

918-669-7400

SWT-2022-73

Regulatory Office

Published Aug. 24, 2022

Expiration date: 9/23/2022

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Location: The proposed project is in Section 12, Township 8 North, Range 3 West; Cleveland County, Oklahoma. The project site can be found on the Norman, Oklahoma 7.5 Minute USGS Quadrangle map at North Latitude 35.18759 and West Longitude 97.45930.

Purpose: The overall purpose of this work is to stabilize the reach of Imhoff Creek to prevent loss of adjacent infrastructure and property. The project is not a water dependent activity.

Description of Work: The applicant proposes to construct a reinforced soil slope wall along the left descending bank of Imhoff Creek that would occur on a rock stabilized toe with the permanent placement of fill material to support the reinforced soil slope wall. The placement of fill material would occur between Sta. 17+00 and Sta. 31+00 (1,100 linear feet) (exception between Sta. 19+00 and Sta. 22+00) and include the permanent placement of approximately 4,210 cubic yards of galvanized baskets containing #57 aggregate (1”-2” stone) within the wire framing and potential embankment material if it meets geotechnical specifications or offsite soil fill material below the OHWM.

Additionally, two (2) permanent cross vanes would be constructed across Imhoff Creek to prevent future down-cutting of the stream bed and support continued function of the reinforced soil slope wall. The southern cross vane would be located at Sta. 23+98 and would include the placement of approximately 17 cubic yards of 18-24” limestone rock riprap within 15 linear feet of stream. The northern cross vane would be located at Sta. 28+98 and would include the placement of approximately 23 cubic yards of 18” -24” limestone rock riprap within 15 linear feet of stream. Each cross vanes would have a center core consisting of steel sheet pile surrounded by rock riprap.

The proposed construction project would also include a rock toe revetment below the OHWM and placement of rock, along the properly sloped bank, above the OHWM. The southern reach would occur between Sta. 23+45 and Sta. 25+20 (175 linear feet) and include the permanent placement of approximately 227 cubic yards of 18 to 24” limestone rock below the OHWM. The northern reach would occur between Sta. 27+65
and Sta. 30+84 (319 linear feet) and include the permanent placement of approximately 414 cubic yards of rock below the OHWM.

Temporary construction pads would be built across the stream to allow construction access from the western side of the stream channel. The existing single-family residences along the left descending bank would limit access from the eastern side. The construction pads would include #57 rock material or crusher run and a properly sized pipeline to allow base stream flow during construction. A total of 11 construction pads would be built during construction. The pads would be built sequentially as construction progresses. The existing pad would be removed prior to construction of the following pad. The total linear length of temporary disturbance proposed within Imhoff Creek is approximately 1,100 feet and the total volume is approximately 3,050 cubic yards (278 cubic yards per each pad). The material would be removed once
construction is complete.

Temporary filtered check dams would be constructed as a best management practice to prevent discharge of sediment-laden storm water down-stream of each temporary construction pad. The temporary structures would include filter wrapped Type 1 riprap or similar rock and 12” layer of gravel, and all material would be removed once construction is complete. The total linear length of each check dam is approximately 23 linear feet and the volume is approximately 52 cubic yards for each check dam. The rock would be removed once construction is complete.
A temporary construction road along the toe of the left descending bank to allow for construction of a reinforced soil slope wall. The temporarily road would be approximately 10 feet wide and 18 inches deep. The road would be constructed of crusher run or equivalent rock and would include the temporary placement of approximately 812 cubic yards of fill below the OHWM. The road would be approximately 1,160 linear feet. The rock would be removed once construction is complete.