Project Summary
Current Phase: Design
Sponsor Project Manager: Arbina Shrestha, P.E. Transportation and Environmental Services
Managing Project Manager: Ayoub Hassen, P.E, PMP, CCM, Project Implementation
Project Description
The City completed a project to inspect all sanitary sewers in stream areas to assess their risk of failure due to stream erosion. Under that study, two sanitary sewers crossing Holmes Run just upstream of I-395, were determined to be at risk of failure. The casing of the upstream sewer is cracked and broken exposing the pipe, and the downstream segment has been undermined by the erosive forces of the stream.
This project will armor two sewer segments in Holmes Run to preserve the integrity of the sewer system, extend its useful life, and protect the surrounding environment. The project consists of three phases: planning, design, and construction. The planning phase took place from spring 2024 through summer 2024. The design phase is scheduled from fall 2024 through fall 2027, with construction anticipated to occur from winter 2028 through spring 2029.
Project Funding
Total Budget: $1,573,300
Planning: $273,300
Design: $250,000
Construction: $1,050,000
FUNDING BREAKDOWN
This project is funded using Sanitary Sewer Enterprise Fund revenues and is programmed in the City's Capital Improvement Program
Schedule
Planning: Spring 2024 - Summer 2024
Design: Fall 2024 - Fall 2027
Construction: Winter 2028 - Spring 2029
Planning Phase
- Field Inspection/Condition Assessment – Inspected total of 157 sanitary sewer segments in stream areas using CCTV camera per NASSCO (National Association of Sewer Service Companies) guidelines to document internal structural and operation and maintenance (O&M) conditions and visually inspected sanitary sewers to assess the risk of failure due to stream erosion or external structural defects.
- Rehabilitation Recommendation – Reviewed inspection reports and photos to determine consequence and likelihood of failures and ultimately assessed the risk of failure of those sanitary sewers. A total of seven sewer segments were determined to be at a risk of failure and were proposed for armoring. Out of which, two segments will be armored under this project.
- Cost Estimate – a planning level cost estimate was performed for design and construction services.
No public outreach was conducted at the planning stage of this project. As part of the design and construction of this project, the City will perform stakeholder engagement with the community to discuss the need for the project and how to best protect the existing sewers while minimizing impacts during construction.
An outreach plan will be developed prior to detailed design starting.
Contact
Ayoub Hassen, P.E., PMP, CCM
Technical Project Manager
City of Alexandria, Virginia
Project Implementation
Transportation & Environmental Services
703.746.4635