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CHANGE ORDER NO. ONE TO CONTRACT K-1415-17: BY AND BETWEEN THE NORMAN UTILITIES AUTHORITY AND LANDMARK STRUCTURES I, L.P., DECREASING THE CONTRACT AMOUNT BY $36,142 FOR A REVISED CONTRACT AMOUNT OF $2,599,858 FOR THE CONSTRUCTION OF A ONE MILLION GALLON ELEVATED WATER STORAGE TANK LOCATED IN NORTHEAST NORMAN AND FINAL ACCEPTANCE OF THE PROJECT.
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BACKGROUND: The addition of another elevated water storage tank was envisioned for several years under capital project Water Tower, WA0293. Computer modeling of the water distribution system indicated the greatest need for elevated storage was in the high pressure plane (HPP) in northeastern Norman. The existing water distribution system had four elevated storage tanks with a capacity of 4.5 million gallons (MG) as follows:
* Cascade Tower, steel/concrete composite tank with capacity of 2 MG;
* Brookhaven Tower, welded steel tank with capacity of 1.5 MG;
* Boyd Tower, welded steel tank with capacity of 0.5 MG;
* Robinson Tower, welded steel tank with capacity of 0.5 MG.
Additionally, 7.5 MG of underground water storage is provided at the water treatment plant (WTP) in two "clearwells", for a total storage capacity of 12 MG. Distribution pumping at the smaller 1.0 MG clearwell feeds the high pressure plane (HPP) in northeastern Norman while pumps from the larger 6.5 MG clearwell feed the four existing storage tanks and the remainder of the Norman distribution system. The construction of the elevated storage tank will provide storage to meet fire demands and maintain reliable pressures in the HPP even if additional water from the clearwell is not available.
On January 14, 2014, the NUA approved Contract K-1314-98 with Professional Engineering Consultants, P.A. (PEC) to provide design, bidding and construction administration services associated with construction of the storage tank. The Oklahoma Department of Environmental Quality (DEQ) approved the design plans on September 15, 2014 and bids were received fr...
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