holmes run weir diversion structure no. 417

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A Fairfax County, VA, publication Department of Public Works and Environmental Services Working for You! Holmes Run Weir Diversion Structure No. 417 Contract Number: CN15402009 Project Number: WW-000007-014 Mason District February 17, 2016

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Page 1: Holmes Run Weir Diversion Structure No. 417

A Fairfax County, VA, publication

Department of Public Works and Environmental Services

Working for You!

Holmes Run Weir Diversion Structure No. 417Contract Number: CN15402009Project Number: WW-000007-014Mason District

February 17, 2016

Page 2: Holmes Run Weir Diversion Structure No. 417

Holmes Run Weir Diversion Structure No. 417

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

Page 3: Holmes Run Weir Diversion Structure No. 417

Project DetailsHolmes Run Weir Diversion Structure No. 417

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

Project Overview:• Excavation of diversion structure and removal of it’s concrete roof.• Installation of mechanical weir. • Installation of new precast concrete roof and weir actuator.

Project Team:• Wastewater Collection Division – Jonathan Okafor • Wastewater Collection Division – Bobby White, Jr. • Utilities Design and Construction Division – Brendan Schillo, P.E.

The purpose of this project is to increase the efficiency of the wastewater sewer system during extreme weather in the Lake Barcroft area. This is accomplished by the installation of a mechanical, adjustable weir in the wastewater diversion structure at the Holmes Run Pump Station. The weir allows for greater control of downstream wastewater flow to the sewer system around Lake Barcroft.

Page 4: Holmes Run Weir Diversion Structure No. 417

Holmes Run Weir Diversion Structure No. 417

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

Mason District – Tax Map No. 60-4

Page 5: Holmes Run Weir Diversion Structure No. 417

Holmes Run Weir Diversion Structure No. 417

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

Excavation and Removal of Diversion Structure Roof

Page 6: Holmes Run Weir Diversion Structure No. 417

Holmes Run Weir Diversion Structure No. 417

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

Structure Modifications in Preparation of Weir Installation

Page 7: Holmes Run Weir Diversion Structure No. 417

Holmes Run Weir Diversion Structure No. 417

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

Installation of Adjustable Mechanical Weir

Page 8: Holmes Run Weir Diversion Structure No. 417

Holmes Run Weir Diversion Structure No. 417

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

New Pre-Cast Concrete Roof for Diversion Structure

Page 9: Holmes Run Weir Diversion Structure No. 417

Before After

Holmes Run Weir Diversion Structure No. 417

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

Page 10: Holmes Run Weir Diversion Structure No. 417

Before After

Holmes Run Weir Diversion Structure No. 417

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

Page 11: Holmes Run Weir Diversion Structure No. 417

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 [email protected]