Execute Purchase Order MCRR 1321 SSWRF Flow Control

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Execute Purchase Order MCRR 1321 SSWRF Flow Control Structure Repairs Commission Agenda Item #4

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 •

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

Flow Control Structure 3

Sluice Gate Stems Flow Control Structure 4

Sluice Gate Stems Flow Control Structure 4

Sluice Gate Actuators • Each sluice gate is raised/lowered by electric actuator • In

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

Sluice Gate Actuators & Stems Emergency Operator Sluice Gates Below in Flow Control Structure 6

Sluice Gate Actuators & Stems Hydraulic Lines from Emergency Operator 7

Sluice Gate Actuators & Stems Hydraulic Lines from Emergency Operator 7

Emergency Operator – Gas Engine & Hydraulic Oil Pump Emergency Operator – Hydraulic Oil

Emergency Operator – Gas Engine & Hydraulic Oil Pump Emergency Operator – Hydraulic Oil Reservoir 8

Sluice Gate Condition • Actuators & emergency operator – Currently function – Nearing end

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 •

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

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

QUESTIONS? 12

QUESTIONS? 12