Specifications include, but are not limited to: 1) Construction of trapezoidal shaped, filter fabric and riprap lined drainage channels (RLC) on the east and west sides of the existing substation yard. The East channel extends from the new diversion dike south to the outfall. West channel to extend from new HDPE pipe culvert southeast to existing drainage ditch. 2) Construction of approximately 441 linear feet of rectangular-shaped open concrete drainage channel along the north side of the substation yard to include the cast-in-place concrete headwall interfacing with the upstream invert of the existing 24” HDPE pipe. 3) Construction of approximately 91.0 lineal feet of trapezoidal-shaped concrete diversion dike structure and a V-shaped swale along the east side of the substation. 4) The station ground grid extends 3’ past the fence and is laid out on 20’ squares at a depth of approximately 18”. Should the existing ground grid be accidentally exposed and/or damaged during construction, the Contractor shall contact FEUS immediately. The Contractor will be responsible for repairing the damage. 5) Demolish three (3) breaker foundations and dispose of material after breakers have been removed by others. 6) Construct three (3) breaker foundations including over-excavation, structural fill, compaction, and installation of owner-supplied conduit and anchor bolts. Maintain the existing 4/0 bare copper grounds and route them to the edge of the new foundation. Install Grounds as needed or damaged. 7) Remove and replace underground PVC conduit to four (4) Circuit Breakers from the cable trench through the circuit breaker foundation. Core drilling, grouting and sealing new and abandoned entrances is expected. Hydrovac excavation may be necessary. 8) Install two (2) 4’-6” diameter by 15’ deep drilled pier foundations including installation of supplied anchor bolt cages. 9) Install a 6” layer of approved high-impedance crushed aggregate stone inside the yard fence in the areas identified in the Grading Plan.
