Cities Index.
Salinas SSMPU Presentation_Wallace Group

Salinas City Council
May 2, 2023

Document
Salinas SSMPU Presentation_Wallace Group
Meeting
May 2, 2023
Body
Salinas City Council
Original file
3.0 MB
Text extracted from the city's file for reading and search. Open the original on legistar2.granicus.com. That file is the official record.

City of Salinas
Draft Sanitary Sewer Master Plan Update (SSMPU)
Prepared by Wallace Group
Kari Wagner, PE Principal/Director of Water Resources
Andrea Kingsbury, PE Civil Engineer

Presentation Overview
Master Plan Objectives
 Study Area
 Flow Monitoring
 Existing & Future Sewer Flows
 Sewer Model Overview & Results
Capital Improvement Program
 Next Steps

SSMPU Objectives
Comprehensive Update to City’s 2011 Sewer Master Plan
Provide City with working, living, functional document to use for budgets, schedule improvement, and plan for the future
 Calibrated Sewer Model
 Prioritized Capital Improvement Program (existing and future conditions)

SSMPU Study Area
Existing Service Area
Future Growth Areas
Target Areas
Bolsa Knolls

Flow Monitoring
Velocity, level, and direction of
flow
18 monitoring locations
45 days
Insignificant rainfall to determine
Inflow and Infiltration

Existing Sewer Flows
 Flow factors based on land use type and population
 Water Use Data
 Flow Monitoring Sewersheds
 Densification per 2020 Census Tract data

Sewer Collection
System Model
Main Trunk Sewer (10‐inch and larger)
 Wallace Group surveyed 689 manholes
 Manhole Rim and Condition; Pipe Invert and Diameter
 As‐built record drawings
11 City Lift Stations
Flow Scenarios (Existing & Future)
 Average Daily Flow
 Max Day, Dry Weather Flow
 Peaking Factor=1.5
 Peak Hour Wet Weather Flow
 Rainfall Dependent Infiltration and Inflow Rates
 Existing: 1,200‐3,000 gallons/acre/day
 Future: 500 gallons/acre/day

Existing System
Deficiencies

Future System
Deficiencies
Future Flow Total= 17,715,200 gallons per day
Flow factors applied to future land use
Future flow assumptions
 Based on most probable connections
 Assume gravity flow, no lift stations (except Ag‐
Industrial Center)
 Based on projected land use, per the General Plan
Modeling should be performed during planning
and design phases for future developments if
different than the assumptions made in the
SSMPU

Salinas SSMPU
Capital Improvement Program
Existing CIPs
 Implementation of existing CIPs to be
completed over the next 1‐7 years
 Hydraulic Deficiencies and O&M Repairs
 Lift Station Upgrades
Future CIPs
 Implementation of future CIPs to be
completed as development comes on‐line
 Identified based on impact of future
developments

Capital
Improvement
Program (Existing)
Existing CIPs ($90‐$120 million)
 Six (6) projects identified as
hydraulic deficiencies
 Twenty‐one (21) O&M Repairs
 CCTV Program
 Inflow/Infiltration Evaluation
 Brick Manhole and Flushing Inlet
Inspection/Replacement
 Includes over $30 million in lift
station upgrades

Capital
Improvement
Program
(Existing Lift Station)
Lift Station Evaluation performed
by Fluid Resource Management
(FRM)
Lift Station CIPs
 Lake Street Lift Station pumping
capacity is undersized to meet
existing peak flows
 Several site upgrades needed at all
lift stations

Capital
Improvement
Program (Future)
Future CIPs ($48.5 million)
 Nine (9) projects identified as
hydraulic deficiencies
 Driven by future development and
growth areas

Next Steps
Finalize Sanitary Sewer Master Plan Update Report
Development Impact Fee Nexus Study and Sanitary Sewer Rate Study Thank You
Questions?

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