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CONSIDERATION OF THE RATIFICATION OF CONTRACT K-1516-93 BY AND BETWEEN THE NORMAN UTILITIES AUTHORITY AND KRAPFF-REYNOLDS CONSTRUCTION COMPANY IN THE AMOUNT OF $344,355; CHANGE ORDER NO. ONE DECREASING THE CONTRACT AMOUNT BY $42,493.80 FOR A REVISED CONTRACT AMOUNT OF $301,861.20, PERFORMANCE BOND B-1516-44; STATUTORY BOND B-1516-45; AND MAINTENANCE BOND MB-1516-29 FOR THE REPAIR TO THE EXISTING AERIAL SEWER CROSSING OVER BISHOP CREEK DAMAGED DURING THE ICE STORM DURING NOVEMBER 28-30, 2015, AND FINAL ACCEPTANCE OF THE PROJECT.
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BACKGROUND: The existing aerial sewer crossing over Bishop Creek just east of the intersection of Constitution and Ryan Avenue was constructed in the 1950's. The crossing was modified during construction of the Constitution Bridge and associated underground tunnels for the University of Oklahoma Golf Course. The crossing consisted of 21-inch sewer piping inside a 24-inch steel casing constructed on three concrete piers with footings.
The aerial sewer crossing and two adjacent manholes over the western leg of Bishop Creek failed when the eastern bank of the creek bed adjacent to the bridge was undermined causing several large trees to fall into the creek. It is believed that the crossing failed sometime over the weekend of Saturday, November 28 through Monday, November 30, 2015. An OU golf course employee notified the City of the problem at about 3:00 p.m. on November 30, 2015.
Norman Utilities Authority (NUA) staff contacted Urban Contractors and they delivered portable pumping equipment which was installed and operating by 6:00 p.m. that night to eliminate the bypass. The Oklahoma Department of Environmental Quality (ODEQ) was notified of the sewer bypass on December 1, 2015 in accordance with their rules. Section 2-111 of the City Code empowers the Mayor to issue a proclamation of emergency when a natural disaster or man-made calamity results in the destruction of property to the extent that extraordinary measur...
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