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Onslow County, NC - ONWASA NRWRF Hurricane Florence Response Flood Mitgation Measures (20180437.00.CL)

Northwest Regional Water Reclamation Facility Hurricane Florence Response Flood Mitigation Measures will be performed in two (2) divisions as summarized below:

1. Division 1 – Flood Mitigation

a. All work necessary to build new, flood proof, precast building around the transfer pumps and SBR blowers at plant locations 240 and 280, as described in the specifications and drawings (DI 227282-1).
b. All work necessary to build new, flood proof, precast building around the Sludge Digester Blower Systems at plant location 680, as described in the specifications and drawings (DI 227282-4).
c. Installation of raised steel platforms for the effluent pump controls at location 500 (DI 227284) and the infiltration pump station located south of the main plant (DI 227286).
d. Installation of raised steel platforms to elevate the motors and associated disconnects, and conversion of pumps and motors for elevated belt or chain driving at locations 200 (SBR Jet Motive Pumps) (DI 227282-2). and 350 (Post EQ Pump System) (DI 227282-3).
e. Installation of Administration flood protection door barriers.
f. Installation of seals for all electrical and instrument conduit seals that are located at or below the 6-foot flood event elevation.


2. Division 2 – Proposed Electrical Structure

a. Installation of new electrical structure and associated foundations, electrical components and rewiring (DI 227288).
b. Installation of new plant-wide transformer (supplied by others), transformer foundation and associated wiring from the transformer.
c. Elevation of the existing large backup generator and associate re-wiring.
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