Wastewater Treatment & Collection System Improvements

Treatment Plant Improvements• Replace aged infrastructure• Increase hydraulic and organic capacity • Provide new technology to address facility compliance

challenges• Provide ability to divert, hold and return influent flow

during high flow events (precipitation, snow melt, etc.)• Convert the WWTP from a seasonal discharger to a

continuous discharge

Summary of Improvements• New head works (screening/grit removal)• Conversion of Lagoon #4 to excess flow basin• Install new septage receiving station• Install new Oxidation Ditch & refurbish existing Oxidation Ditch• Provide two new final clarifiers• Provide new ultraviolet disinfection system for plant discharge• New final effluent cascade aeration• New plant electrical system including new standby generator

Construction StatusEstimated date of substantial completion – January 1, 2015

• Difficult winter construction period

• Due to increased efforts this spring – back on estimated schedule

• Challenging site access conditions (thank you to our neighbors)

Construction Progress•Electrical bank•New Oxidation Ditch•Two new clarifiers•Septage receiving building

Pictures

WWTP Entrance Road

Existing Oxidation Ditch – left foreground

New Oxidation Ditch – Right foreground

Two New Final Clarifiers - Background

New Oxidation Ditch – reinforcement steel

New Oxidation Ditch

North Final Clarifier

Electrical Equipment

Interim Operations PlanPeriod: June1 – August 31• Both Oxidation Ditches – out of service (constructability)•WWTP will store influent in 3 existing lagoons• September 1 – existing oxidation ditch will return to service,

resume active treatment of influent flow to plant• As influent flow volumes allow – redirect stored influent

wastewater back through active oxidation ditch process

Interim Ops Plan

Pro’s• Takes place during normal no

discharge period• Expedites construction• Most efficient method of facility

completion• Best available treatment season

for lagoon activity• Working with non-domestic users

to minimize discharge to WWTP

Con’s• No mechanical facility

treatment• Odor generating potential• Storage volume availability• Extended period to treat

accumulated influent

Collection System Improvements

•New main pump station (PS #16) – replaces PS #6•Replace PS #4 with new PS #4• Sewer rehabilitation

New PS #16

New PS #16

New PS #4

New PS #4

Sewer Rehab Work

Wastewater Treatment & Collection System Improvements

Questions/Comments