Tyee Pond Effluent Pipe Replacement
Project Authorization
Item No.
8f_supp
Date of Meeting November 14, 2023
Tyee Pond Effluent Pipe Replacement
Request Commission Authorization for Executive Director to:
• Advertise, award, and execute a major public works
construction contract for the Tyee Pond Effluent Pipe
Replacement project
2
Project Purpose and Scope
Purpose:
To replace the failing Tyee Pond effluent pipe and ensure that the
Tyee Pond embankment is structurally sound as required by
Department of Ecology Dam Permit
Scope:
• Replacement of 414 linear feet of 72-inch diameter pipe
• Installation of two manholes to provide energy dissipation and
elevation drop
3
Project Location
4
Project Budget:
• Previous Budget $2,540,000
• Revised Budget $2,900,000
Budget increase due to
environmental permitting
regulatory requirements
Project Schedule:
• Construction Start Q2 2024
• Substantial Completion Q3 2024
Project Budget and Schedule
5
Cone of Certainty
6
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