1. Colchester Interceptor System Improvements Project
Community Meeting #1
August 25, 2016
SA Project Manager:
Debbie J. Maxwell, P.E., CCM
Design Engineer:
Michael Baker International
Construction Management:
Arcadis

2. Agenda Purpose of the Project Existing System Conditions
Overview of the Limits of Service
Definitions
Purpose and Benefits of the Project
Existing System Conditions
Proposed System Improvements
Project Details
Site Activities & Notes of Interest
Anticipated Construction Schedule
Contacts
Q&A

3. Purpose of the Project Limits of Service 7 Service Areas
Numerous Lift Stations
Miles of Gravity Sewers
Miles of Force Mains
Prince William
Parkway
Hoadly Road
Belmont Lift Station
Prince William
Parkway
Route 1
Minnieville Road
Interstate 95
Dale Blvd.
Featherstone Road
Project Limits
H.L. Mooney Water Reclamation Facility
Featherstone Lift Station

4. Purpose of the Project Definitions Gravity Sewer Lines
Sewer lines constructed to allow the wastewater to flow based on a downward slope
Interceptor Sewers
Gravity Sewer mains which receive the flow from collector sewers and conveys the wastewater to treatment facilities
Lift Station
A gravity sewer sump with a pump to lift accumulated sewage to a higher elevation
Force Mains
A pressurized sewer line to convey wastewater from a lift station to another service level and gravity sewer

5. Purpose of the Project Purpose of the Project Benefits of the Project
Replace an existing and aged Interceptor Sewer System
Increase system capacity
Reduce or eliminate stormwater and groundwater from entering the system
Benefits of the Project
Provide environmental benefits by relief of potential surcharge conditions
Maintain service reliability

6. Existing System Conditions
Belmont Lift Station
Belmont Force Main
Colchester Road Gravity Sewer Discharge
48” Interceptor Sewer
Featherstone Lift Station

7. Existing System Conditions
Approximately 7,600 linear feet of 36” - 48” gravity interceptor sewer
Approximately 1,500 linear feet of 8” and 12” gravity sewer

8. Proposed System Improvements
Install approximately 5,411 linear feet of 30” and 36” force main
Replace approximately 2,132 linear feet of 48” gravity sewer with 54” gravity sewer
Install approximately 1,530 linear feet of 8” and 12” gravity sewer
Construct a new lift station

9. Proposed System Improvements
Belmont Lift Station
Colchester Road Gravity Sewer Discharge
Marumsco Acres Lake Lift Station
Belmont Force Main
54” Interceptor Sewer
Featherstone Lift Station

10. Proposed System Improvements

11. Proposed System Improvements Marumsco Acres Lake Lift Station

12. Proposed System Improvements Marumsco Acres Lake Lift Station
Lift Station Details
The building is 14’ x 14’
Brick siding
Shingled roof
The Station capacity is 350 gpm
Emergency diesel engine generator as back-up power
Odor Control
Carbon Filters
Bioxide (calcium nitrate)

13. Proposed System Improvements Marumsco Acres Lake Lift Station

14. Site Activities Activities
The Contractor will determine the final sequence of construction
The Lift Station is limited to a 10 month construction period
Open cutting of trenches
Force Mains and some gravity
Trenchless installation
Boring under Featherstone Road to avoid road closures
Microtunnelling for a portion of the 54” gravity main
Installation of new manholes
Tie-in of existing systems

15. Notes of Interest Construction Notes of Interest
Notifications will be provided by the Service Authority and the Contractor for any anticipated interruptions
Access 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 construction
Daily clean-up by the Contractor is required
A Service Authority Inspector will cover this project and others close by and will be on site on a daily basis
A Construction Manager / SA Project Representative will be onsite fulltime for the duration of the project

16. Final Layout Summary Benefits Redirect flows to Belmont Lift Station
Construct a new Lift Station
Extend the force main
Enlarge the gravity sewer size
Benefits
Increase system capacity
Environmental benefits
Relief of potential surcharge conditions
Reduce or eliminate Inflow
Improve system reliability
Colchester Road Gravity Sewer Discharge
Marumsco Acres Lake Lift Station
Belmont Force Main
54” Interceptor Sewer
Featherstone Lift Station

17. Anticipated Construction Schedule
Project Duration
660 days / 21 months
Project Advertisement
August 2016 – November 2016
Anticipated Start Date:
Award Contract in January 2017
Begin Construction in February 2017
Anticipated End Date:
December 2018
Weekday Hours of Operations
7:00 a.m. to 5:00 p.m.
Previously negotiated and approved night time hours
Certain business parcels

18. Contacts Community Relations & Outreach Liaison Marlo Thomas Watson Or
Website:
Project Specific Website:

19. Q & A
Any Questions?