A.01.23_Pre-Solicitation_Overview.pdf

Project Overview

Mechanical:

The project scope is to remove all existing piping, valves, eductors, and sumps in the current sump system. This includes installation of new sump pumps, eductors, gate valves, check valves, foot valves, and piping. Modifications include installation of additional valves for isolation of each sump from other sump systems and the unwatering header. Drain piping from the penstock gallery to each sump will also be addressed.

Electrical:

Project scope is to move all the critical electrical controls for sump pump and eductors from the sump pump area to the upper floor (C- Floor) these electrical controls include: eductor controls, sump pump controls, timer for skimmer, PLC controls and alarm indicators. New DC eductor and sump pump controls in the sump pump area. Run a new 480v electrical circuit from MCC panel to sump pump area for a new wall mounted heater. Run new 120v electrical circuit from MCC panel to sump pump area for skimmer motor and oil heater. Run new conduit and wire from Level controls located in sump pump area to new location of the PLC controls in the upper floor (C- floor).

The primary customer is the Bull Shoals Power House.

Project General Information:

The project structures include a concrete gravity overflow section on the right bank and powerhouse intake structure on the left bank side of the river channel. The concrete gravity non-overflow section and powerhouse intake section is connected to bluffs on the left and right banks. A walkway bridge crosses the overflow section and service roadways connect with the dam and powerhouse. The powerhouse contains four 40,000-kilowatt and four 45,000-kilowatt generating units. The spillway is controlled by 40- by 28-foot crest gates. The stilling basin is of the flat-slab type with an end sill. The reservoir has an area of 71,240 acres for flood control and a total storage capacity of 5,408,000 acre-feet, at elevation 695.