Fairfax County celebrated the completion of its first levee on Saturday, June 15, 2019. The 2,800-foot levee is designed to protect the Huntington community from storms up to and including 100-year flooding events. The project received the Envision Bronze award from the Institute of Sustainable Infrastructure.
The Institute for Sustainable Infrastructure (ISI) announced on Wednesday, April 24, 2019 that the Huntington Levee project in Fairfax County, Virginia is the recent recipient of the Envision Bronze award for sustainable infrastructure.
The Letter of Map Revision (LOMR) Zone A99 designation recognizes that the work completed on the levee project provides a level of flood hazard reduction that allows for flood insurance risk premium rates which would be applicable when the levee system is complete.
The I-wall with swing gate is complete and site stabilization continues. The levee project received the Envision Bronze Award from the Institute of Sustainable Infrastructure for meeting criteria for community, quality of life, management, planning, materials, energy, water, environmental impacts, emissions, and resilience.
The design prepared by ARCADIS includes:
While the levee can help mitigate flooding of houses from the types of storms that have happened in the past, it is not designed to offer protection from flooding that is caused by storms that are greater than a 100-year event (a storm that has a one percent chance of occurring in any given year).
The levee design has been a complex process that required:
The levee design and contract award were completed on schedule.
The county is proceeding on the following schedule:
The concrete I-wall is nearly complete, with the swing gate installation in progress. Final grading on the embankment, trail installation, and site stabilization efforts are in progress. Site office trailers have been demobilized.Project Update September 27, 2018
The temporary pumps worked well in draining the open channels and the basin (low area on the residential side of the levee) during the recent storms. The concrete I-wall is nearly complete. Final grading on the embankment is in progress. Improvements at the north end of Fenwick Dr. and Mount Vernon Dr. are ongoing.
The project, still under construction, has weathered the recent storms well with some street flooding, but residents haven't experienced any structural flooding. The open channels, the basin (low area on the residential side of the levee), as well as the contractor’s temporary pumps have functioned well. We are continuing to monitor the weather and Cameron Run.
The exterior of the pump station is nearing completion and crews are working on interior and mechanical systems. The concrete I-wall installation has started and will continue for the next month. Improvements at the north end of Fenwick Dr. and Mount Vernon Dr. are ongoing.
Recent wet weather has had minimal impact on construction and work continues on schedule. Masonry work at the pump station is nearing completion and the roof is being closed in. Approximately 75% of the sheet piling and embankment material has been installed. Utility work for the pump station has started. The overhead power line relocation and sanitary sewer work at the east end of the site are complete. Storm drain and road work at the north end of Fenwick Drive has started.
An update on construction of the levee system will be presented at a community meeting on Wednesday, June 6, 2018, at 6:30 p.m., at the Huntington Community Center located at 5751 Liberty Drive, Alexandria.
The relocation of the 15-inch sanitary sewer at the east end of the site is complete. Installation of the double box culvert at Fenwick Drive is complete and the contractor is backfilling around it. Structural steel work on the pump station is complete. The mechanical bar screens are installed. The pump station outfall structure and channel are complete. The pump around for the 48-inch sanitary sewer began March 5, 2018. The contractor will be working on this pipe for approximately three weeks.
The concrete for the pump station wet wells and top slabs are complete and the contractor has started assembling the steel for the pump station building. Relocation of the sanitary sewer at the east end of the site is almost complete. The sheet piling for the levee I-wall is being installed from the pump station west toward Fenwick Drive. The site has been prepped to begin installation of the double box culverts at the end of Fenwick Drive.
The project is nearly 50 percent complete. The wet well walls for the pump station are finished and have been backfilled. Form work for the elevated slab over the wet wells is nearing completion. Placement of concrete for the outlet structure at the pump station is almost complete. Installation of the 48-inch storm sewer through the site continues. The contractor has started placing fill for the levee embankment west of the pump station.
Concrete placement for the walls of the pump station is almost complete. The contractor has started the installation of the storm sewers and box culverts that connect to the pump stations. The concrete placement for the pump station outfall channel is 50 percent complete. Relocation of sanitary sewer at the east end of the site should begin soon.
Recent storms and flooding have not impacted construction at the levee site. The contractor is continuing to place concrete for the walls at the pump station. Installation of the toe drain and keyway excavation have begun.
Construction of the pump station continues. Concrete placement will continue into August. The contractor has started installing the 48-inch storm sewer line near Fenwick Drive. This work is expected to take a couple weeks.
Concrete placement for the pump station has begun and will continue through the month of June.
Excavation for the pump station has begun. A crane is installing the piles that will hold wood lagging for temporary shoring around the excavation. A dewatering system has been installed to keep water out of the hole.
Work is moving along well. Tree clearing and grinding operations are complete and top soil is being stockpiled on-site. The old water utility buildings have been removed and wells have been decommissioned. Installation of the dewatering system for the pump station excavation is underway and excavation is expected to begin toward the end of April. A crane that will be used to construct the pump station was delivered.
The erosion and sediment controls have been installed and were approved by the site inspector last week. The contractor is nearing completion of site clearing and grubbing, and construction of the access road from Metroview Parkway continues. The security fence around the site is complete and will be extended from Fenwick to Metroview to keep people off the access road. Excavation for the pump station wet well is expected to begin in April. A groundbreaking ceremony will be held on Thursday, March 23, 2017, at 10 a.m.
The contractor has begun work on the construction access road from Metroview Parkway. Initial work includes the installation of the erosion and sediment controls and a pipe culvert over outfall #1. These steps are being taken to control stormwater runoff from the site and prevent sediment from entering Cameron Run. The construction access road will be extended across the site to the future pump station.
Two temporary trailers have been placed on-site to serve as offices for the contractor and engineering firm. For safety reasons, please stay away from the trailers. Safety fencing and signage will be erected soon closing access to the park. Erosion and sediment controls (black, cloth fencing) will be installed next. An access road will be built from Metroview Parkway on the eastern border of the site. Most construction vehicles will access the site via this entrance. Maps and renderings were presented at the Oct. 22, 2016 community meeting.
For more information or to submit questions or comments about the Huntington Levee project, please call 703-324-5800, TTY 711, or email email@example.com.
12000 Government Center Pkwy
Fairfax, VA 22035