City of Santa Rosa image CIP

Capital Improvement Project

Los Alamos Trunk Sewer Replacement Segment 1 (Streamside Dr to Elaine Dr)

Estimated Construction Schedule: Slated to begin May, 2023 and is anticipated to be completed October, 2024.
Construction Contract Amount: Pending
Project ID #: 1903
Description: This project will replace approximately 5300 linear feet of the existing Los Alamos Trunk sewer that was installed in the 1950s that is undersized and in poor condition. The new trunk sewer will be 24-inches in diameter and will generally be installed adjacent to the existing alignment between Streamside Dr and Elaine Dr through private property and along Mission Circle and Quigg Dr. An above-ground sewer bypass system will be installed for short durations at certain locations before being relocated as it follows the construction progress along the alignment. To minimize both public and business impacts, a portion of the work along Mission Circle is conditioned night work and the proposed water improvements serving 4920 and 4934 HWY 12 are conditioned weekend work.

Construction Update Image

Winter 2024: Onsite Construction Inspector is Adam Dagler 707-328-5743. Construction is progressing on Quigg Dr east of Mission BLVD. Short segments of Quigg will be closed in both directions during construction generally from approximately 8:30 am to 4 pm. Essentially as you exit your driveway onto Quigg Dr during the day you will need to detour either left to Acacia Dr, or right to Mission Blvd depending on the location of construction that day. Look for the detour arrow probably located in front of your driveway on the other side of Quigg (across the street). For up to date construction related information please visit the special project website


Andrew Wilt
Associate Civil Engineer
City of Santa Rosa

Dave Keck
Quality Control Associate
City of Santa Rosa
+1 (707) 481-4312

Mike Janet
Consultant Construction Manager

Ben Bryant, PE
Consultant Design Engineer
Brelje and Race

Phone: (707) 763-8700
Fax: (707) 763-8711

Matt Verke
Contractor Superintendent

Joe Moreira
Contractor Project Manager

Initial Study and Mitigated Negative Declaration
Advance Project Notice - English
Advance Project Notice - Spanish
Geotechnical Information Report
C01903 Invitation for Bids (for information only-see PlanetBids for bidding)
Los Alamos Trunk Sewer Initial Study
C01903 Plans (for information only-see PlanetBids for bidding)
Tree Survey Report
Bid Tabs
Imminent Construction Notice - English
Imminent Construction Notice - Spanish

Other Information:
Report - Biological Resources - Phase 1
Biological Resources - Phases 2, 3, and 4
Report - Cultural Resources - Phase 1
Cultural Resources - Phases 2, 3, and 4
Geotechnical Report - Overall
Geotechnical Report- Phase 1
Tree Survey - Phase 1
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Project Image

Note: All dates and times are subject to change.