Explanation
1.0 BACKGROUND: This legislation authorizes the Director of Public Utilities to enter into a professional engineering services agreement with ms Consultants, Inc. for the Stormwater Pump Station (ST21, ST22, and ST23) Improvements Project, in an amount up to $1,495,658.43, for the Division of Sewerage and Drainage. This agreement will include engineering services to investigate, develop, and evaluate storm system and flood protection improvements for the area southwest of the Arena District near the confluence of the Scioto and Olentangy Rivers. These improvements must: 1) meet the current City of Columbus Stormwater Drainage Manual criteria; 2) eliminate structural flooding for storm events up to and including the 100-year event; and 3) protect from Scioto River 100-year flood event.
1.1 Project Description / Description of Work:
The goals of this project are to provide the area which is bounded on the south by the Scioto River, on the east by the Olentangy River, on the north by I-670, and by high ground on the east 1) storm sewer system(s) that meet the current City of Columbus Stormwater Drainage Manual criteria and eliminate structural flooding for storm events up to and including the 100-year event and 2) protection from Scioto River flood events.
The project will be completed in 2 phases. Phase 1, includes field surveys, hydraulic and hydrology, geotechnical and any other investigations needed to develop and evaluate alternative improvements to meet the project goals. Phase 2 will be detailed design of the approved improvements including preparation of plans and specifications, and engineering services during bidding and construction. It is solely at the City’s discretion whether upon satisfactory completion of Phase 1, the contract will be modified to include Phase 2 work.
1.2 Project Timeline and Modifications:
Phase 1 is planned to start August 2017 with completion in August 2018. Phase 2 (mod 1) may start in September 2018 w...
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