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CHANGE ORDER NO. ONE TO CONTRACT NO. K-1213-66: BY AND BETWEEN THE NORMAN UTILITIES AUTHORITY AND KRAPFF-REYNOLDS CONSTRUCTION COMPANY INCREASING THE CONTRACT AMOUNT BY $59,751 AND EXTENDING THE CONTRACT BY NINETEEN (19) CALENDAR DAYS FOR THE S.E. BISHOP INTERCEPTOR PROJECT, PHASE II, SECTIONS 2A AND 2B, AND FINAL ACCEPTANCE OF THE PROJECT.
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BACKGROUND: The SE Bishop Interceptor improvements were recommended by the Wastewater Master Plan (WWMP) as adopted by the Norman Utilities Authority (NUA) on November 13, 2001. The improvements have been completed in phases as shown on the attached map; Phase 1 was complete in 2004 and Phase 2, Section 1 was complete in January 2007. The current project, Phase 2, Sections 2A and 2B, is now complete and the final project, Phase 2, Section 2C, was advertised for bids on January 2, 2014 with completion expected in late 2014.
On December 18, 2012, the NUA approved Contract No. K-1213-66 in the amount of $1,054,480 with Krapff-Reynolds Construction Company (Krapff-Reynolds) of Oklahoma City for construction of the Phase 2, Sections 2A and 2B improvements. Section 2A consists of approximately 2,400 linear feet (LF) of 24-inch sewer serving the Eagle Cliff and Cobblestone Creek subdivisions, and includes replacement of the existing aerial crossing of Bishop Creek west of 12th Avenue SE at the western end of Cedar Lane Road. Section 2B consists of approximately 1,150 LF of 24-inch sewer north of Highway 9 and west of Classen Boulevard. Construction began January 28, 2013, and was complete on August 15, 2013.
DISCUSSION: As with any project of this scope, field adjustments and modifications were necessary. Proposed Final Change Order No. 1 (CO#1) consists of three adjustments: 1) modifications to the proposed concrete piers at the aerial crossing over Bishop Creek, 2) relocation of an existing waterline and 3) reconciliation of "as-bid" to "as-built" quantities.
During excavation for the new piers to sup...
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