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Updates on Wastewater System Projects

Gonzales City Council
October 6, 2025

Document
Updates on Wastewater System Projects
Meeting
October 6, 2025
Body
Gonzales City Council
Original file
1.4 MB
Text extracted from the city's file for reading and search. Open the original on gonzalesca.iqm2.com. That file is the official record.

Wastewater Program
1 2025 Wastewater Milestones

1. Received 6 Bids for the IW Treatment Facility (IWTF) (February 2025)

2. Secured SRF Planning Grant for MWWTP Upgrades (April 2025)

3. Issued Contract Award for the IW Treatment Facility (May 2025)

4. Completed IW Conveyance System Project (June 2025)

5. Began Construction of the IW Treatment Facility (July 2025)

6. Secured an SRF Loan Extension (August 2025)

7. Kicked off the MWWTP Upgrades Planning Project (August 2025)

8. Continued Infiltration Improvements at the MWWTP (January 2025 – Present)

9. Released MH Rehabilitation Project for Bid (September 2025) 2 IW Conveyance Project Completion
3 Project Accepted: July 21, 2025
Original Construction Bid: $7,610,175.00
Final Construction Cost: $7,467,595.36
Original Total Project Budget: $8,775,000
Final Total Project Cost: ~$8,280,000
IWTF Bid Results and Contract Award
4 February 26, 2025: 6 Bids Received
• Gateway Pacific: $21,938,000 – AWARDED May 19, 2025
• Specialty Construction: $22,219,663
• Clark Brothers: $22,447,500
• SCEI: $22,813,420
• Don Cascade: $24,640,726
• Anderson Pacific: $27,968,100
SRF IW System Loan Extension
5 $6M loan extension secured from SRF
$34,884,000 total loan amount
Accommodated by the 2023 Rate Study
Construction of IWTF
6 • 95 % Complete Grading
• Upcoming: Influent Wet Well Excavation
• Completion: March 2027
Construction of IWTF
7 MWWTP Planning Grant
8 $300,000 SWRCB Grant Awarded
MWWTP Rehabilitation Planning Study
◦ Kickoff Meeting August 2025
◦ Site Walk October 2025
◦ Completion April 2026
MWWTP Emergency Infiltration Work
9 • Additional Basins and Flood Lanes Constructed
• Bioaugmentation Alternatives being Evaluated
• Dechlorination System being Evaluated
• Pricing Rehabilitation of MWWTP Infiltration Basins A and C. 2025-26 Wastewater Work Plan

1. Industrial Wastewater System

2. Municipal Wastewater System

3. Adopt Updated Sewer Ordinance with Pretreatment Program for Industrial Dischargers
11 Industrial Wastewater System
12 1. Continue IW Treatment Facility Construction

2. Apply for RWQCB Discharge Permit for IWTF
Municipal Wastewater System
13 1. Manhole Rehabilitations

2. Clean, Video Inspect and Rehabilitate Existing 21” Sewer Trunk Main

3. Install Additional Groundwater Monitoring Wells at MWWTP

4. Finalize MWWTP Rehabilitation Plan

5. Issue RFP for Wastewater Master Plan
Adopt Updated Sewer Ordinance with
Pretreatment Program
14 Wastewater Program
15 Questions and Comments

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