UTILITIESRECOMMENDED

City of SeaTac Transportation and Public Works Committee Agenda Packet 2026-06-25

SeaTac, Midway Sewer District agree on sewer ILA

$1,439,781.60 (engineer’s estimate of construction cost; District to reimburse actual direct construction costs plus 10% for construction administration, net of certain side sewer costs borne by the City)City of SeaTacMIDWAY SEWER DISTRICTJune 25, 2026

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Description

SeaTac Public Works is proposing an interlocal agreement with Midway Sewer District for the City to construct new gravity sewer collection facilities within the Airport Station Area Pedestrian Improvements Project and be reimbursed for all related costs plus a 10% construction administration fee. The sewer work has an engineer’s estimate of $1,439,781.60 with construction expected to begin in September 2026 and run for about 655 working days.

Contract Details

Contract Amount

Vendor

MIDWAY SEWER DISTRICT

Agency

City of SeaTac, WA

Contract Type

UTILITIES

Document Date

June 25, 2026

Contract Term

Construction estimated to start September 2026 with anticipated duration of 655 working days

Renewal Info

Single-project construction ILA; no renewal or automatic extension is described. Cost overrun sharing applies only if both bid and final costs exceed 125% of the engineer’s estimate; some side sewer costs explicitly allocated to the City.