Explanation
1.0 BACKGROUND: This Ordinance authorizes the Director of Public Utilities to modify and increase the professional engineering services agreement with Patrick Engineering Inc. for the O’Shaughnessy Hydro Turbine Facilities Improvements Project, Division of Water Contract No. 972.
The O’Shaughnessy Hydro Turbine Facility is more than thirty years old and its major components are in need of repair. The original agreement (Phase 1) provided engineering services to design the improvements needed to restore the facility to fully working condition. Work performed to date includes engineering study and field inspection of exposed / non-wetted areas.
This Contract Modification (No. 1) is for Phase 2 work and includes Preliminary and Detailed Design Services, including bulkhead repairs, dewatering, inspections and condition assessments of concealed / wetted areas, development of a scope of improvements for detailed design work, detailed design, and bidding services.
Planning area 2: Far Northwest
1.1 Amount of additional funds to be expended: $1,798,100.00
Original Contract Amount: $ 250,000.00 (EL016667)
Modification No. 1 (current): $1,798,100.00
Total (Orig. + Mod. 1) $2,048,100.00
Modification No. 2 (future): $ 800,000.00
$2,848,100.00
1.2. Reasons additional goods/services could not be foreseen:
Ordinance No. 2690-2014 anticipated Contract Modification No. 1 for Detailed Design Services, however, bulkhead repairs were not anticipated.
Bulkheads are used to keep water out of the facility during dewatering and were not in good repair. This prevented the team from successfully dewatering the facility to perform the in-depth inspections required for preliminary engineering. Additionally, the original scope of work assumed that the disassembly and reassembly of the hydro turbines would be performed by the City of Columbus staff, or others. This is highly specialized work controlled by tight tolerances. The City staff cannot perform...
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