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Colchester Interceptor System Improvements Project
Community Meeting #2July 24, 2017
SA Project Manager:Debbie J. Maxwell, P.E., CCM
Design Engineer: Michael Baker International, Inc.
Construction Management: Arcadis U.S., Inc.
Construction Contractor:Garney Companies, Inc.
Agenda
Purpose of the ProjectOverview of the Limits of ServiceDefinitionsPurpose and Benefits of the Project
Existing System ConditionsProposed System Improvements
Project DetailsSite Activities & Notes of InterestAnticipated Construction ScheduleContactsQ&A
Purpose of the Project
Limits of Service7 Service AreasNumerous Lift StationsMiles of Gravity SewersMiles of Force Mains
Featherstone Lift Station
H.L. Mooney Water Reclamation Facility
Project Limits
Belmont Lift Station
Purpose of the Project
DefinitionsGravity Sewer Lines
Sewer lines constructed to allow the wastewater to flow based on a downward slope
Interceptor SewersGravity Sewer mains which receive the flow from collector sewers and conveys the wastewater to treatment facilities
Lift StationA gravity sewer sump with a pump to lift accumulated sewage to a higher elevation
Force MainsA pressurized sewer line to convey wastewater from a lift station to another service level and gravity sewer
Purpose of the Project
Purpose of the ProjectReplace an existing and aged Interceptor Sewer SystemIncrease system capacityReduce or eliminate stormwater and groundwater from entering the system
Benefits of the ProjectProvide environmental benefits by relief of potential surcharge conditionsMaintain service reliability
Existing System Conditions
Featherstone Lift Station
Belmont Lift Station
Colchester Road Gravity Sewer
Discharge
Belmont Force Main
48” Interceptor Sewer
Existing System Conditions
Approximately 7,600 linear feet of 36” - 48” gravity interceptor sewerApproximately 1,500 linear feet of 8” and 12” gravity sewer
Proposed System Improvements
Install approximately 5,411 linear feet of 30” and 36” force mainReplace approximately 2,132 linear feet of 48” gravity sewer with 54” gravity sewerInstall approximately 1,530 linear feet of 8” and 12” gravity sewerConstruct a new lift station
Proposed System Improvements
Featherstone Lift Station
Belmont Lift Station
Colchester Road Gravity Sewer
Discharge
Belmont Force Main
54” Interceptor Sewer
Marumsco Acres Lake Lift Station
Proposed System Improvements
Proposed System ImprovementsMarumsco Acres Lake Lift Station
Proposed System ImprovementsMarumsco Acres Lake Lift Station
Lift Station DetailsThe building is 14’ x 14’
Brick sidingShingled roof
The Station capacity is 350 gpm
Emergency diesel engine generator as back-up powerOdor Control
Carbon FiltersBioxide (calcium nitrate)
Proposed System ImprovementsMarumsco Acres Lake Lift Station
Site Activities
ActivitiesThe Contractor will determine the final sequence of constructionThe Lift Station is limited to a 10 month construction periodOpen cutting of trenches
Force Mains and some gravityTrenchless installation
Boring under Featherstone Road to avoid road closuresMicrotunnelling for a portion of the 54” gravity mainInstallation of new manholesTie-in of existing systems
Notes of Interest
Construction Notes of InterestNotifications will be provided by the Service Authority and the Contractor for any anticipated interruptionsAccess will not be interrupted
Emergency Services, school buses, trash, mail and other services will not be disrupted
Temporary parking areas will be coordinated with land owners, the Department of Parks and Recreation, and HOAs if needed by the Contractor prior to constructionDaily clean-up by the Contractor is requiredA Service Authority Inspector will cover this project and others close by and will be on site on a daily basisA Construction Manager / SA Project Representative will be onsite fulltime for the duration of the project
Final Layout
Featherstone Lift Station
Belmont Lift Station
Colchester Road Gravity Sewer
Discharge
Belmont Force Main
54” Interceptor Sewer
Marumsco Acres Lake Lift Station
SummaryRedirect flows to Belmont Lift StationConstruct a new Lift StationExtend the force mainEnlarge the gravity sewer size
BenefitsIncrease system capacityEnvironmental benefits
Relief of potential surcharge conditions
Reduce or eliminate InflowImprove system reliability
Anticipated Construction Schedule
Project Duration660 days / 21 months
Anticipated Start Date:Award Contract in July 2017Notice to Proceed in September 2017On-site Construction start anticipated for October 2017
Anticipated End Date:July 2019
Weekday Hours of Operations7:00 a.m. to 5:00 p.m. Previously negotiated and approved night time hours
Certain business parcels
Contacts
Community Relations & Outreach LiaisonMarlo Thomas Watson571.285.8127Email: [email protected] Specific Website: http://www.pwcsa.org/colchester-project
Q & A
Any Questions?
Proposed Layout
