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County Board Approves Agreement with Alexandria To Dredge Four Mile Run

The County Board voted this weekend on an agreement with the City of Alexandria to dredge Four Mile Run in order to help mitigate flooding.

The neighboring jurisdictions will split the costs related to permitting, designing, construction, and dredging Four Mile Run, from around I-395 to the Potomac River.

“It’s time for us to undertake a joint dredging project so we can project that part of the county from flooding to the maximum extent possible,” said Arlington County Board Chair Matt de Ferranti at Saturday’s Board meeting.

The dredging — which will remove built-up sediment and debris from the bottom of the waterway — is expected to cost about $3.6 million, with each jurisdiction paying about $1.8 million.

The project is expected to get under way in the late summer or early fall, and will take approximately four months, Aileen Winquist of Arlington’s Dept. of Environmental Services tells ARLnow.

The work comes after the United States Army Corps of Engineers’ (USACE) most recent inspection report gave the state of Four Mile Run a rating of unacceptable. The Corps built a levee system along Four Mile Run in the 1970s and 80s to help with flood mitigation, after a series of devastating floods that inundated Alexandria’s Arlandria neighborhood.

The recent unacceptable rating from USACE was due to “excessive shoaling,” meaning the flood channel is too shallow and can lead to excessive flooding.

“Maintenance of the open channel of Four Mile Run includes clearing of debris, sediment, vegetation, and re-stabilizing stream banks as required by the USACE annual inspection program,” says Winquist. “This maintenance work helps to preserve the flood channel’s capacity and reduce flood risk in neighborhoods surrounding south Four Mile Run.”

The areas around Four Mile Run have flooded a number of times over the past decade, including in 2011, 2017, and in 2019. Flooding two years ago was historic and caused some $6 million in damage to county property alone.

The agreement would also put on paper a long-standing understanding about maintenance of Four Mile Run. The north side will be Arlington’s responsibility and the south side will be Alexandria’s responsibility.

The needed improvements for the Long Branch Tributary will remain the sole fianincal responsibility of Arlington, since it’s within county borders. The budget for the entire project is about $4.7 million with Arlington agreeing to pay $2.56 million and Alexandria paying $2.16 million.

File photo

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9th Street Chamber Music is back in business for its second season! 9SCM is disrupting the stereotypes of classical music as stuffy, dry, and elite through dynamic yet accessible performances and its one-of-a-kind String Quartet Intensive for young musicians in the DC Metro area.

[9th Street Quartet](https://www.9thstreetchambermusic.com/9th-street- quartet)’s first concert is on Sunday, October 16 at 4:00 PM. The group will offer, for the first time, a ‘Playlist Shuffle’ themed concert featuring single movements of string quartet favorites. Tickets for this concert can be found here, and are $20 for adults and FREE for all students under 18.

Rehearsals began Monday, September 27 for the String Quartet Intensive, welcoming 32 new and returning members to the program. These talented musicians in grades 7 through 12 represent over fifteen area schools throughout Northern Virginia, DC and Maryland, and are an integral part of the growing 9SCM community. Their first performance will take place on Monday, November 28 at 7:30 PM.

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Special Guest: This wine dinner we will be hosting the wine maker

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