Flag Run Walk
15 February 2008: Walked upstream from the mouth of Flag Run to its last upstream outlet in North Springfield.
The mouth of Flag Run joins Lake Accotink beside the Lake Accotink Park marina. There is slack water about 100 yards upstream. Buffer is excellent in the park above the marina. There are some invasive alien species present, including multiflora rose, Japanese honeysuckle, English ivy, and garlic mustard. Trash is prevalent here and all along Flag Run.
Nearing Queensberry Ave, this part of the park becomes a corridor along the banks of Flag Run. This corridor of parkland continues all the way to the source of the stream. Buffer is still good, but the single-family houses are near on both sides. There are well-used informal footpaths along the banks here contributing to erosion.
Above Queensberry Ave, as far as I-495, Flag Run is flanked on the west by Ravensworth Industrial Park and on the east by single-family houses. The industrial park is separated from park property by a wooden fence, which helps prevent dumping and wind-blown trash. Invasive alien privet is common here. Buffer is still fair, but one house has mowed to the bank, perhaps encroaching on park property.
Above I-495, park property and buffer briefly widen considerably along the west side, then narrow again. There is much invasive alien English ivy, pachysandra, and bamboo here. English ivy forms extensive carpets in some areas.
The last upstream outlet of Flag Run is a storm drain just below Juliet St.
Erosion is prevalent all along Flag Run, similar to most parts of the Accotink Creek watershed.
The amount of trash along this small stream in a mostly residential area is surprising. Some trash must wash of I-495, but trash is about as bad upstream from I-495 as it is downstream.
1 Northwestern Watershed
2 Daniels Run
3 Hunters Branch
4 Bear Branch
5 Long Branch North
6 Main Stem - Pickett Rd downstream to Prosperity Ave
7 Main Stem - Prosperity Ave to Little River Turnpike
8 Crook Branch
9 Coon Branch
10 Turkey Run
11 Long Branch Central
12 Wakefield Park (Main Stem - Little River Turnpike to Braddock Road)
13 Lake Accotink Park (Main Stem - Braddock Road to Old Keene Mill Road )
14 Main Stem - Old Keene Mill Road to Ft. Belvoir Engineering Proving Ground
15 Main Stem - Ft Belvoir Engineering Proving Ground
16 Main Stem - Ft Belvoir Engineering Proving Ground to Telegraph Road
17 Long Branch South
18 Main Stem - Telegraph Road to Potomac River
19 Flag Run
20 Calamo Branch
21 Field Lark Branch
22 Mason Run
23 Kernan Run
24 Hatmark Branch