Design Phase includes: Finalize sewer alignment Manhole locations and material selection Construction phasing plan Final restoration for former pump station site/access Existing utility coordination Easement acquisition (if applicable) By-pass water & sewer locations Temporary service outage plan – water/sewer/gas Traffic control plans Phasing Detour and closure plan

1. A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Wastewater Project – Virtual Community Meeting
Microsoft Teams – December 14, 2021, at 6:00 p.m.
Fairfax County Project Manager: Christopher Mata, P.E.
Project Engineer: Dewberry
December 2021

2. Springfield Estates Pump Station Gravity Sewer Replacement – Study 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. Next Steps - Design Phase
6. Next Steps - Construction Phase
7. Project Schedule
8. Questions and Answers

3. Springfield Estates Pump Station Gravity Sewer Replacement – Study 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:
– Heather Campbell, P.E. – Project Manager
– Sam Forster, P.E. – Project Engineer
– Stephanie Acosta, E.I.T. – Project Engineer

4. Springfield Estates Pump Station Gravity Sewer Replacement – Study 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 @ Christopher.Mata@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. Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Project Location
Capital Facilities – Wastewater Design and Construction Division – Collections Branch 5
Project
Location
Flow Direction
Springfield Estates Pump
Station Service Area
Springfield Estates Pump
Station Building

6. Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
Project Background & Need
6
• Neighborhood was built in the 1950s,
and the sewer infrastructure and pump
station has been in operation since.
• Aged pump station equipment – pumps,
valves, fans, concrete, etc.
• This aging equipment has the potential
of causing:
– Sanitary Sewer Overflows (SSO)
– Sewer back-ups into homes
– Environmental damages
– Maintenance problems
Photos

7. Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Existing Conditions – Pump Station
Capital Facilities – Wastewater Design and Construction Division – Collections Branch 7
Springfield Estates Pump
Station Building
Existing Generator &
Odor Control
Existing Access
Driveway
Cimarron St
Pioneer
Dr
Incoming Flows
Discharge Flows
Pump Station Site

8. Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Existing Conditions – Pump Station
Capital Facilities – Wastewater Design and Construction Division – Collections Branch 8
1. Pump Station Driveway from Apache St. 2. Pump Station Building 3. Towards Apache St.

9. Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Study Phase - 2020 Technical Memorandum (TM)
Capital Facilities – Wastewater Design and Construction Division – Collections Branch 9
• Evaluated existing conditions – flow analysis,
hydraulic assessment, construction impacts,
pump station assessment
• Evaluated alternatives – rehabilitate existing
pump station, relocate the pump station, or
convey all flow by gravity
– Criteria used: Life cycle cost, community
impacts, constructability, operability,
reliability.
• Recommended Alternative:
– Alternative A: Demolish pump station and
convey flow by gravity along Pioneer
Drive

10. Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Study Phase – 2021 Preliminary Engineering Report (PER)
Capital Facilities – Wastewater Design and Construction Division – Collections Branch 10
• Fall 2021 Report:
– Evaluated existing conditions
• Flow analysis
• Hydraulic assessment
• Geotechnical conditions
• Environmental impacts
– Evaluated construction impacts
• Traffic control
• Bypass pumping
• Easement requirements
– Alternative analysis to determine preferred installation method
• Trenchless (not feasible)
• Open cut
• Recommended Alternative:
– Install sewer by open cut method

11. Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Study Phase - 2021 PER – Gravity Sewer Replacement
Capital Facilities – Wastewater Design and Construction Division – Collections Branch 11
• 2,000 LF +/- of new gravity sewers
• 1,300 LF of 10” sewer
• 700 LF of 12” sewer
• 12 new manholes
• Remove existing sewer
• Re-connect services to new sewer
• Adjust sewer alignment to limit gas
and water crossings
• Demolish pump station and restore
surrounding land to grass

12. Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Study Phase – 2021 PER – Pump Station Demolition
Capital Facilities – Wastewater Design and Construction Division – Collections Branch 12
• Disconnect utilities and remove
salvageable equipment
– Pumps, generator, motors
• Remove any hazardous material
• Demolish above grade structure to 3’
below grade
• Fill below grade structures, backfill top 3’
with topsoil and establish grass
• Demolish access driveway, backfill with
topsoil and establish grass
• Abandon existing forcemain and gravity
sewer in place
Cimarron St
Pioneer
Dr
Apache
St
Springfield Estates
Pump Station

13. Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
Next Steps - Design Phase – Gravity Sewer Improvements
13
• Design Phase includes:
– Finalize sewer alignment
• Manhole locations and material selection
• Construction phasing plan
– Final restoration for former pump station
site/access
– Existing utility coordination
– Easement acquisition (if applicable)
– By-pass water & sewer locations
– Temporary service outage plan – water/sewer/gas
– Traffic control plans
• Phasing
• Detour and closure plan

14. Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
Next Step - Design Phase – Pump Station Abandonment
14
Cimarron St
Pioneer
Dr
Apache
St
Abandon
Gravity Sewer
Springfield Estates
Pump Station
Remove Driveway,
Remove Fence, &
Abandon Force Main
Remove Overhead
Electric
Remove Pump
Station Building &
Equipment

15. Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
Next Steps - Construction Phase - What to expect
15
• Construction impacts anticipated:
– Temporary road closures and detours
– Excavation within the pavement
– By-pass pumping operations to limit
outages
– Temporary outages to sewer, water
and gas
– Temporary equipment and material
storage
– Phased construction activity

16. Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Project Schedule
16
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
July 2020
2020 TM
Began
October 2020
2020 TM
Complete
January 2022
Begin Final
Design
Spring 2023
Construction
Beginning
December 2021
Public Meeting
Spring 2024
Construction
Completion
July 2021
PER Began
Dec. 2021
PER
Complete
Winter 2022
Design
Complete, Bid
Project
December 2022
(anticipated)
Public Meeting

17. Springfield Estates Pump Station Gravity Sewer Replacement – Study Project
Questions & Answers
17
Capital Facilities – Wastewater Design and Construction Division – Collections Branch
Current
Conditions
After
Demolished Pump
Station – land
restored
Newly constructed
sewer pipe
Existing Pump
Station Location

18. Additional Information
For additional information, please contact
www.fairfaxcounty.gov/publicworks
Oak Marr Pump Station Rehabilitate – 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