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CONSIDERATION OF FINAL ACCEPTANCE AND FINAL PAYMENT OF CONTRACT K-1718-103 BY AND BETWEEN THE CITY OF NORMAN, OKLAHOMA, AND GRISSOM LANDSCAPE NURSERY FOR OFFSITE TREE PLANTING FOR MAIN STREET BRIDGE OVER BROOKHAVEN CREEK AND BUDGET TRANSFER.
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BACKGROUND: The existing West Main Street Bridge was constructed in 1972. This bridge is identified in the Stormwater Master Plan as being "hydraulically deficient". It is unable to convey a ten-year (10%) storm. This condition likely caused the bridge to sustain serious damage in the flood of August 19, 2007. City crews made temporary emergency repairs at that time to keep the bridge in service. On January 27, 2009, the Norman City Council approved programming Resolution R-0809-96 requesting federal funds to replace the bridge and roadway approaches on West Main Street over Brookhaven Creek, located 1/2 mile west of 36th Avenue West.
The existing West Main Street Bridge consists of two fifty-five feet (55)' long by 9.5' by 6.4' Corrugated Galvanized Metal Pipes (CGMP) arch pipes that were constructed in 1972. The existing arch pipe bridge structure has been removed and replaced with a triple cell 16' by 8' reinforced concrete bridge structure that will be skewed to align with the existing creek channel and will be capable of handling the 100-year 1% storm. In addition, approximately 2,200' of channel improvements will occur from just upstream of Main Street and continuing to the south. The channel improvements will allow a larger discharge below the bridge without raising the Base Flood Elevation (BFE) anywhere along the creek.
On August 28, 2012, Norman voters approved a General Obligation Bond Issue for eight major transportation/stormwater projects throughout Norman in the amount of $42.5 million. The Main Street Bridge Project is one of those eight infrastructure projects.
On April 22, 2014, Council approved Contract K-1314-137; a Right of Way, Utility and Encroachment agreement with the Oklahoma...
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