How To Design Conveyance System For Wastewater Animal Shelter

Tysons Westward Wastewater System Enhancements

Project Background

The Fairfax County Section of Public Works and Environmental Services, which is responsible for wastewater collection and treatment in Fairfax County, is working on several wastewater infrastructure projects to collect and treat the additional wastewater that is predictable to come up from the northern parts of Fairfax County. The Tysons Wastewater Conveyance Systems Modifications project is one of these projects.

The goal of Tysons Wastewater Conveyance Systems Modifications project is to increase the size of the sewer organization to accommodate the planned growth in the northern Fairfax County and to ensure the system continues to provide continuous reliable service to all customers. This project will decrease the risk of wastewater overflows and back-ups during periods of high wastewater flows by diverting flow from existing infrastructure.

Since information technology tin can take v years or longer to finer programme, blueprint, construct, and bring these types of facilities online, the canton is working at present to stay alee of the development. This project is in the Difficult Run Watershed. This project is located in the Hunter Manufactory and Providence Magisterial Districts.

Project Description

The canton has been studying futurity flow projections for the northern Fairfax County and compared them to the capacity of the existing pipes, pump stations, and treatment chapters. The study showed that facilities in the northern Fairfax County have bereft capacity to handle time to come flows. The study concluded that the wastewater flows from northern Fairfax County can be pumped to the Noman Cole Pollution Command Found, the wastewater handling facility in Lorton VA, which has available treatment chapters for these time to come flows. To transport the flows to treatment facility, the county has been developing and evaluating three main components of the transmission infrastructure: a gravity sewer pipeline; a pump station; and a force master (a pressurized pipeline).

Illustration - Tysons Pump Station — *The existing Tysons Contrivance pump station will be replaced.*

Gravity Sewer

To arrange the higher volume of wastewater the county anticipates, the canton evaluated eight potential routes for a new gravity sewer pipeline based on a ready of criteria. The criteria included community impacts (residential, commercial, traffic, parking, dissonance/dust), environmental impacts (streams, parks, trails, trees, wetlands, open spaces), costs (construction, maintenance, and performance) and others.

The pipeline route, the county selected, provides approximately two miles of new sewer pipe in the Tysons expanse to transport wastewater from private customer connections to the new pump station.

Pump Station

The existing pump station must be replaced with a new, larger facility. The current station was constructed in 1969 and had the ability to pump one 1000000 gallons per day of wastewater. The new pump station will pump upwards to 25 million gallons per twenty-four hours to the Lorton wastewater handling facility.

The new pump station volition exist located in the northern part of the Tysons surface area in a low-lying area in the vicinity of the Spring Hill Metro Station virtually the existing pump station. The new pump station building will be a state-of the-art facility with energy efficient pumps, odor and noise control, and emergency redundancy power. The building will be designed to fit into the community with advisable architectural treatment.

Force Main

Ten potential routes for the strength chief to behave wastewater to the Lorton VA wastewater facility for treatment were evaluated.

The criteria for evaluating the forcefulness chief pipeline routes were the same the gravity pipeline criteria and included community impacts (residential, commercial, traffic, parking, noise/dust), environmental impacts (streams, parks, trails, trees, wetlands, open spaces), costs (structure, maintenance, and operation), while other criteria such as pipeline pressure were specific to the force master. The selected road provides five.5 miles of new pipeline to transport wastewater.

Project Location

Timeline

Planning	Spring of 2020 – Spring of 2022
Design	Bound of 2022 – Summer of 2024
Construction Completed	Summertime 2026

What to Expect

Expanse residents, business owners, and other key stakeholders located close to the selected pipeline routes will have an opportunity to hear presentations and make comments on the selected road. The county will publish a summary of responses to questions on this website. Once that'due south completed, a quiet period for blueprint and permitting volition follow.

It is estimated that construction impacts will last for only a few days in 1 location along the pipeline as the work progresses quickly. Impacted stakeholders will be notified in advance of structure activities. Some of the construction will be performed using trenchless methods to reduce the affect to roads and traffic.

In addition, stakeholders located near the pump station site will receive data about the pump station facility structure and any potential impacts that may have on them.

Project cost and funding source

The engineer's preliminary opinion of the cost for this projection is $110 million and it is being fully funded through sewer service charges from existing customers and availability charges, which are one-time fees for the initial connection to the organization. No tax dollars are funding these improvements and at that place volition be no bear on to the rates existing customers pay for their wastewater service.

Presentations to the community

Recording of Tysons Due west Public Coming together - May 10, 2022

Contact

For more information, please contact the project manager Agata Fallon.

Frequently Asked Questions

one. What is the Tysons Wastewater Conveyance Systems Modifications Project?

The Tysons Wastewater Conveyance Systems Modifications (Tysons West) projection is a Fairfax County Department of Public Works and Environmental Services wastewater facilities expansion project that will provide facilities for conveyance of increasing wastewater flows to treatment facility in Lorton Virginia. This project volition provide new: collection arrangement piping, pump station and strength primary (force per unit area pipe) to transport the wastewater.

2. What is the goal of the Tysons Wastewater Conveyance Systems Modifications Projection?

The Tysons Wastewater Conveyance Systems Modifications projection volition increase the size of the sewer system to adjust the planned growth in the northern Fairfax County and to ensure the organisation continues to provide continuous reliable service to all customers. By diverting flows from existing infrastructure, this project will decrease the hazard of wastewater overflows and back-ups during periods of high wastewater flows.

three. Who benefits from this project?

All system users (residents and businesses within the County'due south service area) will benefit from this project, as they will go along to have a resilient and robust wastewater organisation, without overflows or backups. The local environment also will benefit from the reduced run a risk of sewer overflows and system failures.

four. Who will be impacted by this project?

Property owners, residents, and businesses nearby will be impacted past the construction for a fourth dimension. This volition include commercial and residential properties every bit well every bit Fairfax Canton Public Schools, Virginia Department of Transportation, Fairfax County Park Authority, NOVA Parks, and utility companies. Some levels of impact are unavoidable for such a large infrastructure project. Fairfax County will reach out to those impacted to explicate the impacts and work to develop strategies to reasonably mitigate them.

5. How were the selected pipeline routes chosen?

Many routes, all of which had challenges and create impacts, were evaluated past the Fairfax County Section of Public Works and Environmental Services in consultation with its engineering science consultant, CDM Smith. Several evaluation criteria were considered, including:

Community
Hydraulic factors
Constructability
Environmental
Land rights
Utilities
Costs
Stakeholders

It is our goal to notice a road inside this corridor that creates the least impacts for the to the lowest degree corporeality of people.

half dozen. Are details of the selected routes available?

We accept identified a corridor for the pipe alignments and are in the procedure of gathering information nigh the existing weather condition within the corridor and doing field surveys. We volition exist providing updates on this website as the project develops.

seven. How volition traffic be impacted in the projection area?

Pedestrian, cyclist, and vehicle safety is a key consideration in all design decisions, however, at this fourth dimension nosotros are uncertain whether whatever portions of roadways volition be closed and, if then, for what duration. We will work closely with VDOT to develop Maintenance of Traffic plans, to transportation modes. This is a required role of blueprint development and volition follow other similar roadway projects in the surface area. When the plans are completed, we will share them.

8. Volition any of this structure exist done at night?

At this early on stage, no decision has been made about night construction timing or construction methods. Nosotros will work closely with stakeholders, including simply not limited to, impacted belongings owners, VDOT, other utility providers, and the contractor to develop the best construction schedule to minimize affect of construction activities.

9. Has this projection been coordinated with parks and trails?

Yes, nosotros will be coordinating the design with the Fairfax Canton Parks Authority and NOVA parks. We coordinate to minimize impacts and maintain trail access or provide temporary trail routes where needed.

Source: https://www.fairfaxcounty.gov/publicworks/capital-projects/tysons-west-wastewater-system-enhancements

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