Execute Purchase Order MCRR 1321 SSWRF Flow Control Structure Repairs Commission Agenda Item #4
SSWRF Flow Control Structure • All wastewater enters plant via 150 -inch MIS • Wastewater then: – Flows through flow control structure – Is controlled by 2 -6’ by 10’ sluice gates • 1 gate operated under normal conditions • 2 nd gate is redundant 2
Flow Control Structure 3
Sluice Gate Stems Flow Control Structure 4
Sluice Gate Actuators • Each sluice gate is raised/lowered by electric actuator • In case of power failure, use gas powered emergency hydraulic operator 5
Sluice Gate Actuators & Stems Emergency Operator Sluice Gates Below in Flow Control Structure 6
Sluice Gate Condition • Actuators & emergency operator – Currently function – Nearing end of useful lives • Based on their high criticality, staff recommends replacing these components now • Prevent an unexpected failure in future 9
Contract Scope • Replace electric actuator for each of the 2 sluice gates • Replace gas powered emergency hydraulic operator • Replace wiring & conduit from the actuators to local control panel 10
Project Costs/Schedule • VWM competitively bid contract • J. F. Ahern was low responsible responsive bidder, 2 bids received • Project is within budget • 200 day duration 11