1 Collection System And Wastewater Treatment Plant Sewer Update

2 Planning Documents  Sewer Master Plan (2008)  15 yr plan  As-built drawings, prior studies’ data, sewer TV inspection logs, data from operators  Discharge Permit  5 yr cycle  Based on “Basin Plan” (State Water Board)

3 Funding  Sewer Enterprise Fund  Loans  SRF, USDA, etc…  Grants  Fewer available  Demographic and/or geographic requirements

4 Maintenance & Capital Improvement  City = regular scheduled maintenance, minor repairs  Contractor = larger projects (line rehabilitation, replacement, facility upgrades)

5 Collection System Highlights  29 miles of sewer pipe  5 lift stations (10 pumps)  NEWCSD

6 Sewer Pipe Age as Percent of System

7 Collection System Challenges  Age  Roots  Grease  Infiltration and Inflow  Improperly Installed Laterals  Cracking, missing pipe, deflection, etc…

8 Capital Improvement Priority and Cost

9 Wastewater Treatment Plant Highlights  First constructed in 1948, upgraded in 1992 & 2006  Grade IV, tertiary treatment facility  Beneficial re-use of discharge (GCID & Sacramento National Wildlife Refuge)  0.8 MGD average, permitted to 1.2 MGD (ADWF)  5 lift stations, 4 distinct treatment processes  Operated & maintained by Severn Trent Services

10 Wastewater Treatment Plant Challenges  Aging infrastructure  Permit Compliance  MUN Beneficial Use = Time Schedule Order to comply  Compliance spearheaded by State, Cities assist/support  Colusa, Biggs, Live Oak, Willows  De-designate beneficial use on waterways through Basin Plan Amendment = permit issue solved

11 Permit Compliance Timeline