2019 study evaluated several alternatives for replacement Selected alternative would: Eliminate the exposed sewer/stream crossing Maintain level of sewer services to the community Provide future access ease to Fairfax County’s wastewater operator Improve system’s reliability in the area Reduce future risk of sanitary sewer overflows Reduce risk to public health and the environment

1. A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
Indian Run Gravity Sewer Replacement – Construction Project
Wastewater Project – Virtual Community Meeting
Microsoft Teams - July 28, 2021, at 6:00 p.m.
Fairfax County Project Manager: Christopher Mata, P.E.
Project Engineer: Dewberry
July 2021

2. Indian Run Gravity Sewer Replacement – Construction Project
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
Agenda
2
1. Project Team Introductions & Attendee Virtual Sign-In
2. Project Location
3. Project Background & Need
4. Study Phase
5. Design Phase
6. Construction Phase
7. Project Schedule
8. Questions and Answers

3. Indian Run Gravity Sewer Replacement – Construction Project
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
Project Team Introductions & Attendee Virtual Sign-In
3
• Fairfax County Project Manager:
– Christopher Mata, P.E. – Senior Engineer III
• Department of Public Works and Environmental Services (DPWES) – Capital Facilities –
Wastewater Design and Construction Division – Wastewater Collection Branch
• Dewberry Project Team:
– Carmen Bere, P.E. – Principal Project Manager

4. Indian Run Gravity Sewer Replacement – Construction Project
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
Virtual Meeting Administrative Items
4
• Attendee Virtual Sign-In (2 options)
1. Private Message me on MS Teams – Name, Property Address, Email,
Phone Number
2. Email me @ cmata0@fairfaxcounty.gov - Name, Property Address,
Email, Phone Number
• To reduce feedback, please remain on mute until the end of the
presentation during the Q&A
• The chat board on the right-side of your screen is available
throughout the presentation

5. Indian Run Gravity Sewer Replacement – Construction Project
Project Location
Capital Facilities – Wastewater Design and Construction Division – Collections Branch 5
Project
Location
Flow Direction
Sewer service area
and project area

6. Indian Run Gravity Sewer Replacement – Construction Project
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
Project Background & Need
6
• Neighborhood was built in the 1950s, and the
sewer infrastructure has been underground
since
• Over the years the sewer infrastructure has
become exposed by stream erosion
• These exposed sewer mains have the
potential of causing:
– Sanitary Sewer Overflows (SSO)
– Sewer back-ups into homes
– Environmental damages
– Maintenance problems

7. Indian Run Gravity Sewer Replacement – Construction Project
Existing Conditions
Capital Facilities – Wastewater Design and Construction Division – Collections Branch 7
Current
Flow
Pattern

8. Indian Run Gravity Sewer Replacement – Construction Project
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
Study Phase
8
• 2019 study evaluated several alternatives for
replacement
• Selected alternative would:
– Eliminate the exposed sewer/stream crossing
– Maintain level of sewer services to the community
– Provide future access ease to Fairfax County’s wastewater
operator
– Improve system’s reliability in the area
– Reduce future risk of sanitary sewer overflows
– Reduce risk to public health and the environment

9. Indian Run Gravity Sewer Replacement – Construction Project
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
Design Phase
9
• Includes Designing:
– Re-routing of sewer mains:
• Along Columbia Road
• Crossing Birch Lane cul-de-sac
– Abandonment/Removal of sewer mains:
• Off Columbia Road and down into the Indian Run
Stream Valley Park
– New sewer service lines (laterals):
• For homes on Birch Lane cul-de-sac
– New bank stabilization rock wall:
• Off the Birch Lane cul-de-sac

10. Indian Run Gravity Sewer Replacement – Construction Project
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
Design Phase
10
• Also:
– Design temporary sewer & stream by-
pass pumping
– Design traffic controls
– Coordinate with affected properties
– Acquire land rights for permanent
sanitary sewer and temporary
construction easement
– Obtain permits – VDOT, Erosion &
Sediment Control

11. Indian Run Gravity Sewer Replacement – Construction Project
Proposed Changes
Capital Facilities – Wastewater Design and Construction Division – Collections Branch 11
New Sewer Mains
Abandonment of
sewer in place
New Sewer
Service Lines
Bank Stabilization Rock Wall

12. Indian Run Gravity Sewer Replacement – Construction Project
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
Construction Phase - What to expect
12
• Construction Activity:
– Intersection of Columbia Road and
Montgomery Street
– Along Columbia Road, roughly 320-feet
south of Montgomery Street
– Along Birch Lane cul-de-sac
– Construction entrance off Randolph Road
south of Locust Way
• 2 temporary by-pass systems set up:
– 1 on intersection of Columbia Road and
Montgomery Street
– 1 on Columbia Road, roughly 320-feet south
of Montgomery Street
– Pumps will run for roughly 3-months
– Pumps are within enclosure to limit noise

13. Indian Run Gravity Sewer Replacement – Construction Project
Construction Phase – Construction, Temporary By-Pass Systems, & Tree Removal
Capital Facilities – Wastewater Design and Construction Division – Collections Branch 13
Construction
Activity Area
Temporary Sewer/Stream
By-Pass Locations
Tree Removal

14. Indian Run Gravity Sewer Replacement – Construction Project
Capital Facilities – Wastewater Design and Construction Division – Collection Branch
Construction Phase – Traffic Plans
14
• Traffic Impacts from:
1. Construction Activities
• Phased construction approach and utilization of
steel plates - which will minimize impacts to traffic
in the neighborhood
• Portion of Columbia Road near Montgomery Street
will be temporarily closed
• Birch Lane cul-de-sac will be temporarily closed
• Access to home/driveway will remain throughout
2. By-Pass Pumping Operations
• 2 by-pass system set-up locations
• By-pass piping will cross driveways – ramping
systems will be set up at each driveway
Capital Facilities – Wastewater Design and Construction Division – Collections Branch

15. Indian Run Gravity Sewer Replacement – Construction Project
Construction Phase – Limits of Traffic Impact
Capital Facilities – Wastewater Design and Construction Division – Collections Branch 15
Phased-Construction Activity
Limits of Traffic Impact

16. Indian Run Gravity Sewer Replacement – Construction Project
Project Schedule
16
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
February 2019
Study Began
July 2019
Study
Complete
November 2021
Anticipate
Acquiring all
Land Rights
Winter 2021
Construction
Beginning
July 2021
Public
Meeting
Winter 2022
Construction
Completion
December 2019
Design Began

17. Indian Run Gravity Sewer Replacement – Construction Project
Capital Facilities – Wastewater Design and Construction Division – Collection Branch
Questions & Answers
17
Capital Facilities – Wastewater Design and Construction Division – Collections Branch

18. Additional Information
For additional information, please contact
www.fairfaxcounty.gov/publicworks
Indian Run Gravity Sewer Replacement – Construction Project
Christopher Mata, P.E.
703-324-5111, TTY 711
cmata0@fairfaxcounty.gov
Capital Facilities – Wastewater Design and Construction Division – Collections Branch 18
Questions & Answers