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CONSIDERATION OF AWARDING BID 1718-48; APPROVAL OF CONTRACT K-1718-103 BY AND BETWEEN THE CITY OF NORMAN, OKLAHOMA, AND GRISSOM'S LANDSCAPING AND NURSERY IN THE AMOUNT OF $121,618.02; PERFORMANCE BOND B-1718-67; STATUTORY BOND B-1718-68, AND MAINTENANCE BOND MB-1718-51, AND RESOLUTION R-1718-89 GRANTING TAX-EXEMPT STATUS FOR THE MAIN STREET BRIDGE OVER BROOKHAVEN CREEK TREE PLANTING PROJECT.
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BACKGROUND: The existing West Main Street Bridge was constructed in 1972. This bridge is identified in the Storm Water 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 55' long by 9.5' by 6.4' CGMP arch pipes that were constructed in 1972. The existing arch pipe bridge structure will be 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 11, 2009, City Council approved contract K-0910-56 with Garver, LLC for the preliminary design of this project. On June 11, 2010, Council approved amendment No. 1 for the final design of this project. On December 31, 2012, Council approved Amendment No. 2 modifying th...
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