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CONTRACT K-1415-134: A CONTRACT BY AND BETWEEN THE CITY OF NORMAN, OKLAHOMA, AND MESHEK AND ASSOCIATES, PLC, IN AN AMOUNT NOT-TO-EXCEED $143,000 TO PROVIDE A COMPREHENSIVE HYDRAULIC AND HYDROLOGIC STUDY FOR LOWER IMHOFF CREEK.
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BACKGROUND: A Storm Water Master Plan (SWMP) was developed for the City of Norman by PBS&J and accepted by City Council in November, 2009. Among other things, this plan delineated the various watersheds in the City, identified stream segments which needed restoration and improvement, and identified projects to provide this restoration including concept designs. As stated in the SWMP, solutions for problems in the Imhoff Creek watershed are by far the most significant compared to solutions in other watersheds. One such stream segment is the Lower Imhoff Creek between Lindsey Street and Imhoff Creek's confluence with the Canadian River.
In the Storm Water Master Plan, Lower Imhoff Creek is divided into two problem areas, or "reaches": IC-1 and IC-2. IC-1 is that portion of Imhoff Creek between State Highway 9 and its confluence with the Canadian River (see Exhibit A in the contract). IC-2 is that portion of Imhoff Creek between State Highway 9 and a point some 2000 linear feet north of Imhoff Road. IC-2 is the focus of the current project (see Exhibit B in the contract). The SWMP recommends design and installation of stream bank stabilization techniques along stream segments IC-1 and IC-2.
The SWMP identified the problem for IC-1 to be "800 LF of severe bank erosion along both banks downstream of Highway 9. The erosion along the banks has caused trees to fall into the creek". The identified problem in the SWMP for IC-2 is "4,200 LF of severe bank erosion along both banks beginning at the upstream face of Highway 9 to approximately 2,000 LF upstream of Imhoff Rd. The erosion along the banks has caused property fences and trees to fall into the creek." Please see the attached location map from the SWMP. ...
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