Dark Canyon Culvert Replacement

Added: May 10, 2012 5:40 pm THE SOLICITATION FOR THIS PROJECT WILL BE POSTED ON OR ABOUT 5/24/2012 WITH RESPONSES DUE ON 6/25/2012.

Work Description: The Dark Canyon Creek Culvert Replacement project is an aquatic restoration project that restores vital fish habitat and connectivity in the Upper Grande Ronde River Basin. The existing culvert is an approximately 60' long, 5' diameter pipe. Forest road 21 is a high use recreational road. It is a one lane aggregate surface road and shall be closed during the project. Significant and highly visible traffic control signs shall be required at major intersections/access points in the project area. A detour route shall be utilized along FSRs 2100400, 2135400 and 2135000 and shall be required to be signed and maintained. The new structure shall be a 14 foot structural plate culvert founded on concrete spread footings. The project includes a stream by-pass during construction, about 100 feet of stream reconstruction and simulation, and re-contouring of existing fill slopes.

Project is subject to ODFW in-water work window. In-water work can start no earlier than July 1 and must be completed by October 1. Work outside the ordinary high water mark may be performed outside of this time frame.

The project is located at approximately MP 10.6 along Forest Road 21 (Spring Creek Road) south of I-84 (T2S, R35E, SE ¼ of Section 26) in Union County, OR. The project is easily accessed from I-84 using Spring Creek exit #248 11 miles west of La Grande. The project is located at approximately MP 10.6.

The Government's estimate is between $100,000 and $150,000.