South Van Dorn Sanitary Sewer Emergency Replacement and Stream Restoration January 2016

A Fairfax County, VA, publication

Department of Public Works and Environmental Services

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S. Van Dorn Sanitary Sewer Emergency Replacement and Stream RestorationContract No. CN15402011Project No. WW-000024-002

Mason District

December 15, 2015

S. Van Dorn Sanitary Sewer Emergency Replacement and Stream RestorationPost Construction

Capital Facilities/Utilities Design and Construction Division/Wastewater Design and Construction Branch

Project DetailsS. Van Dorn Sanitary Sewer Emergency Replacement and Stream Restoration

Capital Facilities/Utilities Design and Construction Division/Wastewater Design and Construction Branch

Project Overview:• Installation of 1000 feet of emergency bypass pumping• Replacement of approximately 120-feet of 20-inch DIP sewer pipe• Installation of large boulder riffle core and placement of surrounding class III riprap• Stream bank restoration

Project Team:• Utilities Design and Construction Division – Brendan Schillo, Jennifer Arias• Wastewater Collection Division – Bobby White, Jonathan Okafor• Stormwater Planning – Justin Pistore

Description:The S. Van Dorn Sanitary Sewer Emergency Replacement and Stream RestorationProject consisted of the emergency replacement of a ruptured sanitary sewer that crosses Backlick Run. To protect the new pipe crossing, an environmentally friendly approach was implemented using large boulder riffle core surrounded by class III riprap. Additional riprap was used to restore the eroding stream banks of this section of Backlick Run. This project was substantially completed on November 6, 2015.

S. Van Dorn Sanitary Sewer Emergency Replacement and Stream Restoration

Capital Facilities/Utilities Design and Construction Division/Wastewater Design and Construction Branch

Mason District – Tax Map No. 81-1 and 81-2

S. Van Dorn Sanitary Sewer Emergency Replacement and Stream Restoration

Capital Facilities/Utilities Design and Construction Division/Wastewater Design and Construction Branch

Emergency Sewer Bypass Pumping System

S. Van Dorn Sanitary Sewer Emergency Replacement and Stream Restoration

Capital Facilities/Utilities Design and Construction Division/Wastewater Design and Construction Branch

Installation of Stream Bypass Culvert

S. Van Dorn Sanitary Sewer Emergency Replacement and Stream Restoration

Capital Facilities/Utilities Design and Construction Division/Wastewater Design and Construction Branch

Removal of Broken Sanitary Sewer Pipe

S. Van Dorn Sanitary Sewer Emergency Replacement and Stream Restoration

Capital Facilities/Utilities Design and Construction Division/Wastewater Design and Construction Branch

Installation of Boulder Riffle Core Pipe Protection

S. Van Dorn Sanitary Sewer Emergency Replacement and Stream Restoration

Capital Facilities/Utilities Design and Construction Division/Wastewater Design and Construction Branch

Sewer Pipe Installation and Concrete Encasement

S. Van Dorn Sanitary Sewer Emergency Replacement and Stream Restoration

Capital Facilities/Utilities Design and Construction Division/Wastewater Design and Construction Branch

Protection of Stream Bank with Class III Rip Rap

S. Van Dorn Sanitary Sewer Emergency Replacement and Stream Restoration

Capital Facilities/Utilities Design and Construction Division/Wastewater Design and Construction Branch

Finished Product with Stream Flow

Before After

S. Van Dorn Sanitary Sewer Emergency Replacement and Stream Restoration

Capital Facilities/Utilities Design and Construction Division/Wastewater Design and Construction Branch

Additional Information

For additional Information, please call

www.fairfaxcounty.gov/dpwes

S. Van Dorn Sanitary Sewer Emergency Replacement and Stream Restoration

Capital Facilities/Utilities Design and Construction Division/Wastewater Design and Construction Branch

Irene Haske Public Information Officer

703-324-5821, TTY 711SWPDmail@fairfaxcounty.gov