Phase 1 Sewer Collection System Cleaning and Video Dover Lane Sewer Main Repairs Avon Creek Sewer Main Repairs Fern Canyon Sewer Repairs Fern Canyon
Phase 1 Sewer Collection System Cleaning and Video Dover Lane Sewer Main Repairs Avon Creek Sewer Main Repairs Fern Canyon Sewer Rep...
Phase 1 Sewer Collection System Cleaning and Video Dover Lane Sewer Main Repairs Avon Creek Sewer Main Repairs Fern Canyon Sewer Repairs Fern Canyon Storm Drain Culvert Repairs West Street Sewer Main Repair Raised Manhole Project Lift Station “B”
Force Main Refit 3- Way Valve Replacement Pump/Motor Assembly Replacement Controller Installment
Projects in Progress -
Lift Station A1 Pump and Motor Assembly Replacement Lift Station 9 Pump and Motor Assembly Replacement Lift Station 9 Generator Replacement WWTF Aeration Basin Repairs and Modification WWTF Blower Modifications
This project initiated the video and cleaning of the first 20% portion of the 54 mile sewer collection system
Sewer collection system cleaning and video first 20% of district system. Cleaning and video crew on east ranch
CCTV crew within collection system easement in Strawberry Canyon
CCTV cleaning crew at Highway 1 manhole
This 60 foot repair on Dover was identified during the Phase 1 CCTV project
Dover Lane
Contractors beginning Dover Lane repair
This project repaired three malfunctioning sewer laterals located in a portion of main under Avon Creek
Avon Creek
One of the leaking sewer lateral prior to repair
Avon Creek
Sewer lateral after repair
This project repaired a section of leaking sewer main in a 10” main in Fern Canyon. This damaged pipe section was identified in Phase 1 CCTV work
Fern Canyon Sewer repair
Defective pipeline section
Fern Canyon Sewer repair
Finished repair. Note erosion control devices
This project repaired an aging storm drain culvert that crossed 10” sewer main.
Fern Canyon storm drain culvert repair
Location of culvert repair. Note damage to access road serving three downstream sewer manholes as a result of culvert failure
Fern Canyon storm drain culvert repair
Damaged culvert outlet
Fern Canyon storm drain culvert repair
Damaged culvert invert
Fern Canyon storm drain culvert repair
Damaged culvert invert
Fern Canyon storm drain culvert repair
Collapsed culvert inlet
Fern Canyon storm drain culvert repair
Repaired culvert invert
Fern Canyon storm drain culvert repair
Installing new culvert inlet headwall
Fern Canyon storm drain culvert repair
Culvert outlet repair
Fern Canyon storm drain culvert repair
Repaired culvert . New headwall, repaired outlet with rip rap. New road base section. Erosion control
Project identified by the CCTV project involved repairing a section of sewer main that was damaged as a part of the Chevron MTBE Monitoring Project
West Street Sewer Main Project
Repaired sewer location
This project identified first three of many manholes that are suspect inflow and infiltration (I &I)
Raised manholes Fern Canyon
Manhole in close proximity to creek flow line raised to minimize I&I. This picture prior to raise
Raised manholes Fern Canyon
Fern Canyon Manhole. Note signs of I&I
Raised manholes Fern Canyon
Lower section of manhole ready to be raised
Raised manholes Fern Canyon
Final Raised Manhole
Raised manhole Highway 1
Signs of I&I major manhole upstream of sewer siphon under Santa Rosa Creek near WTTF
Raised manhole Highway 1
Infiltration prior to repair
Raised manhole Highway 1
Raised manhole sections after repair
Raised manhole Highway 1
Completed manhole repair
Raised Manhole Moonstone
Manhole at critical junction along Moonstone. Note how Manhole appears to be in sump condition
Raised Manhole Moonstone
Manhole after completed raising
Lift Station “B” repairs included a number of repairs and upgrades to the districts largest sewer pumping facility. The repairs included reconstructing the effluent force main, replacing the three way valve, replacing the pump/motor assemblies and installation of a computerized control system
Lift Station “B”
Shot of inside Lift Station “B” drywell prior to rehab
Lift Station “B” force main pipe refit
Structural defects caused the 10” force main connections entering the lift station to become un sound
Lift Station “B” force main pipe refit
A portion of this project was to move the bypass connection to the left side of the isolation valve.
Lift Station “B” force main pipe refit
Final Refit inside Building
Lift Station “B” force main pipe refit
Final Refit Outside Building
Lift Station “B” Three way valve replacement
Three way, prior to replacement. This valve was stuck in the open position with no way to isolate pumps
Lift Station “B” Three way valve replacement
Three way after replacement
Lift Station “B” pump/motor assembly replacement
Pump/motor assemblies prior to replacement
Lift Station “B” pump/motor assembly replacement
Pump/motor assembly prior to replacement. Note significant metal decomposition
Lift Station “B” pump/motor assembly replacement
Side by side of old pump and new pump
Lift Station “B” pump/motor assembly replacement
One down one to go. After replacing this assembly motor run times went from 6 minutes and 50 seconds on the old assembly to 52 seconds on the new assembly
Lift Station “B” pump/motor assembly replacement
Close up of new assembly with new check valve and influent valve
Lift Station “B” pump/motor assembly replacement
Final Replace of both Pumps and Motors
Lift Station “B” pump/motor assembly replacement
Installed Lift Station Control unit. This computerized controller monitors flow rates, motor run times and wet well alarm levels. The unit also tracks and records trends allowing operators better tracking of pump and motor use and efficiencies. The next step is to connect the Waste Water operations via telemetry to a central device that allows this new information to be viewed and alarmed from portable devices
Include Replacement of pump/motor assemblies at LS “A1” and “9” , replace generator at LS 9, clean and retrofit aeration basin at WWTF and retrofit WWTF blowers
This project is currently out to bid for replacement
Lift Station A1 Pump/Motor Assembly Replacement
Lift Station A1 Prior to Replacement.
Lift Station A1 Pump/Motor Assembly Replacement
Lift Station A1 Pump # 2
This project is currently out to bid for replacement
Lift Station 9 Pump/Motor Assembly Replacement
Lift Station 9 Prior to Replacement.
Lift Station 9 Pump/Motor Assembly Replacement
Lift Station 9 Prior to Replacement.
Lift Station 9 Generator Replacement
Lift Station 9 Generator Prior to Replacement
Currently one of the districts two aeration is empty the first project to clean the pond and repair air bubble diffusers. A bid to perform that work is in progress. In anticipation of stricter guidelines for effluent nitrates we are also looking into a de nitrification project that could be adjunct to the cleaning and diffuser project.
Waste Water Treatment Facility Aeration Pond
View of empty Aeration Pond with diffusers
Waste Water Treatment Facility Aeration Pond
View of a portion of diffuser
The air handling system for the WWTF facility consists of three 125HP blowers and one 100 HP blower which are controlled by soft start control systems. At present only one 125 HP and the 100 HP blower are operational. The goal is to ultimately have all four blowers controlled by Variable Speed Drives (VFD) for efficiency and energy savings. A mix of project combinations are being reviewed with the plant consulting engineer and PG&E with the goal of obtaining 0% interest loans from the utility.
