County	Stream name	Watershed	Station Number	Latitude	Longitude	Location	Date	VA SOS Score	Ecological Condition
Fairfax
	Accotink Creek	Potomac
			1AACO-AC10-SOS	38.8647	-77.2849	Ranger Road Park upstream from foot bridge.  Park is located off Ranger Road in City of Fairfax.
							04/10/01	4	Unacceptable
							02/02/03	2	Unacceptable
							08/24/03	7	Unacceptable
							11/02/03	3	Unacceptable
							04/30/04	4	Unacceptable
							08/01/04	6	Unacceptable
							11/30/04	4	Unacceptable
			1AACO-AC2-SOS	38.8325	-77.22	Across from park near I495/ .1-.2 mi south of Rt 236 & I-495 in Annandale
							01/24/02	2	Unacceptable
							02/26/02	2	Unacceptable
							04/30/02	3	Unacceptable
							04/03/03	2	Unacceptable
							07/25/03	4	Unacceptable
							10/30/03	8	Gray Zone (Indeterminate Conditions)
							02/25/04	3	Unacceptable
							04/22/04	4	Unacceptable
							07/07/04	5	Unacceptable
							10/27/04	4	Unacceptable
							04/26/06	3	Unacceptable
			1AACO-AC3-SOS	38.8656	-77.271	Ranger Road Park
							02/23/02	4	Unacceptable
							04/14/02	6	Unacceptable
							07/27/02	3	Unacceptable
			1AACO-ACC6-SOS	38.8164	-77.2282	Due west of ballfield concession stand in Wakefield park. Intersection of 495 and Braddock Road - 620
							04/08/01	4	Unacceptable
							02/09/02	5	Unacceptable
							04/01/02	4	Unacceptable
							07/21/02	4	Unacceptable
							04/28/03	3	Unacceptable
							10/19/03	3	Unacceptable
							02/28/04	4	Unacceptable
							04/25/04	4	Unacceptable
							07/11/04	6	Unacceptable
			1AACO-ACC9-SOS	38.85333	-77.2456	Site is located in Eakin Community Park, downstream from road, behind the children's play area.  The park is located off Prosperity Ave, between Little River Turnpike (236) and Arlington Boulevard (50).
							02/15/02	3	Unacceptable
							04/03/03	5	Unacceptable
							07/24/03	4	Unacceptable
							10/30/03	5	Unacceptable
							02/24/04	4	Unacceptable
							04/22/04	5	Unacceptable
							07/07/04	5	Unacceptable
							10/27/04	3	Unacceptable
							02/01/06	4	Unacceptable
							02/01/06	4	Unacceptable
							04/26/06	2	Unacceptable
			1AACO-AC11-SOS	38.9594	-77.2051
							11/08/03	4	Unacceptable
			1AACO-AC14-SOS	38.8046	-77.2325	At Lake Accotink Park, walk down trail from main office to creek, just downstream to first good riffles
							10/25/04	4	Unacceptable
	Accotink Creek (tributary)	Potomac
			1AACO-ACC15-SOS	0	0	Off private lane, feeds pond; stretch between Holburn and Country Lane
							06/25/05	5	Unacceptable
	Backlick Run	Potomac
			1ABAL-CAM06-SOS	38.79297	-77.1629	At Wilburdale Park
							08/29/04	7	Unacceptable
							11/27/04	5	Unacceptable
	Big Rocky Run	Potomac
			1ABIR-CR4-SOS	38.8683	-77.407	Rocky Run stream Valley Park, Greenbriar Development
							04/20/04	6	Unacceptable
							07/31/04	7	Unacceptable
							11/06/04	8	Gray Zone (Indeterminate Conditions)
			1ABIR-CR5-SOS	38.8556	-77.4295	Site is located in Eleanor C Lawrence Park, by Walney Pond downstream of metal bridge.  Park is located off Walney Road, near 66 and Rte 28
							04/08/01	8	Gray Zone (Indeterminate Conditions)
							02/10/02	5	Unacceptable
							04/13/02	3	Unacceptable
							02/02/03	3	Unacceptable
							04/26/03	3	Unacceptable
							08/31/03	7	Unacceptable
							10/25/03	7	Unacceptable
							02/22/04	4	Unacceptable
							04/29/04	4	Unacceptable
							08/01/04	7	Unacceptable
							11/14/04	7	Unacceptable
							12/03/06	7	Unacceptable
			1ABIR-CR09-SOS	38.86825	-77.4052	First riffle downstream from Greenbriar Park (trailhead at pool)
							07/13/03	5	Unacceptable
							10/19/03	5	Unacceptable
							02/22/04	2	Unacceptable
							04/10/04	4	Unacceptable
							07/13/04	5	Unacceptable
							10/30/04	5	Unacceptable
							02/15/06	6	Unacceptable
							07/23/06	8	Gray Zone (Indeterminate Conditions)
							07/23/06	8	Gray Zone (Indeterminate Conditions)
							08/11/06	6	Unacceptable
			1ABIR-CR10-SOS	38.84653	-77.4485	Trail to stream runs between 4321 and 4323 Majestic Lane - sample near bridge.  Big Rocky Run Stream Valley Park
							11/16/03	3	Unacceptable
							02/15/04	3	Unacceptable
							04/22/04	2	Unacceptable
							07/26/04	5	Unacceptable
							11/14/04	8	Gray Zone (Indeterminate Conditions)
							02/20/05	4	Unacceptable
							07/29/05	5	Unacceptable
							11/07/06	6	Unacceptable
	Bullneck Run	Potomac
			1ABUN-BULL01-SOS	38.96545	-77.2145	About 1/4 mile upstream from where BR enters the Potomac River
							11/30/04	4	Unacceptable
							04/12/05	3	Unacceptable
							08/20/05	6	Unacceptable
							03/04/06	6	Unacceptable
							08/08/06	8	Gray Zone (Indeterminate Conditions)
							08/08/06	8	Gray Zone (Indeterminate Conditions)
							08/08/06	8	Gray Zone (Indeterminate Conditions)
	Burke Spring Branch	Potomac
			1AXKS-PIM08-SOS	38.91365	-77.1792	Burke's Spring Branch's confluence with Pimmit Run
							02/21/04	2	Unacceptable
							10/31/04	5	Unacceptable
							04/17/05	5	Unacceptable
							08/28/05	6	Unacceptable
	Burke's Spring Branch	Potomac
			1AFOU-PIM06-SOS	38.90877	-77.1792	In Haycock-Longfellow Park, within 15 feet upstream and downstream of wooden bridge behind Longfellow School
							11/23/03	5	Unacceptable
							11/28/04	5	Unacceptable
			1AFOU-PIM05-SOS	38.908	-77.1794	approximately 200-500 ft. downstream of Hutchison Street, on McLean Greens common land
							11/26/03	2	Unacceptable
							04/18/04	4	Unacceptable
							08/19/04	5	Unacceptable
							12/04/04	2	Unacceptable
			1AFOU-PIM04-SOS	0	0
							11/22/03	6	Unacceptable
			1AFOU-PIM07-SOS	0	0
							11/29/03	2	Unacceptable
			1AFOU-PIM10-SOS	0	0	On Brooks Square Common Land, downstream of the confluence of the 2 forks of Burke's Spring Branch, and upstream of the berm that creates inline swp.
							08/05/05	2	Unacceptable
	Calamo Stream	Potomac
			1ACAL-ACC12-SOS	38.7723	-77.1946	25 yards west of intersection of Ridgeway and Calamo Street
							07/13/04	3	Unacceptable
							11/06/04	3	Unacceptable
	Cinnamon Creek	Potomac
			1ACIN-DR9-SOS	38.9475	-77.2794	40 yards West of wooden bridge, within 20 yards of work by Judy O'Kay.
							01/12/02	6	Unacceptable
	Clark's Branch	Potomac
			1ACLA-PB1-SOS	39.03	-77.2586	Site is located in Riverbend Park, near confluence with Potomac River.  Riverbend Park is off Jeffrey Road, north of Great Falls Park.
							08/30/01	8	Gray Zone (Indeterminate Conditions)
							08/29/03	5	Unacceptable
							03/27/04	4	Unacceptable
							11/22/04	4	Unacceptable
							08/18/05	8	Gray Zone (Indeterminate Conditions)
	Colvin Run	Potomac
			1ACOV-DR13-SOS	38.96556	-77.3097	Under bridge on Hunter Mill Road , down from Lake Fairfax
							04/29/06	9	Acceptable
							07/22/06	10	Acceptable
			1ACOV-DR28-SOS	38.957	-77.3334	Site is located downstream from where Wiehle Crosses over Colvin Run.  North of Chestnut Grove Homes complex.  100’ downstream from Bridge 16, behind Bentana Park East Town houses
							04/14/01	8	Gray Zone (Indeterminate Conditions)
							01/12/02	8	Gray Zone (Indeterminate Conditions)
							07/21/02	10	Acceptable
							07/12/03	6	Unacceptable
							11/26/03	7	Unacceptable
							02/07/04	9	Acceptable
							04/25/04	6	Unacceptable
							07/24/04	8	Gray Zone (Indeterminate Conditions)
							11/20/04	7	Unacceptable
							11/05/05	10	Acceptable
							11/18/06	10	Acceptable
	Colvin Run (unnamed tributary)	Potomac
			1ACOL*DR20-SOS
							02/15/02	4	Unacceptable
							03/27/02	3	Unacceptable
							07/28/02	3	Unacceptable
							11/28/05	3	Unacceptable
							08/01/06	4	Unacceptable
							10/19/06	3	Unacceptable
							02/20/07	4	Unacceptable
			1ACOV-DR27-SOS	38.96194	-77.3236	Tributary downstream of Lake Anne behind Tall Oaks assisted living
							04/09/01	3	Unacceptable
							02/25/02	6	Unacceptable
							04/11/02	5	Unacceptable
							02/12/03	5	Unacceptable
							05/01/03	4	Unacceptable
							08/27/03	4	Unacceptable
							11/05/03	4	Unacceptable
							02/04/04	5	Unacceptable
							02/04/04	5	Unacceptable
							04/22/04	4	Unacceptable
							08/19/04	2	Unacceptable
							10/26/04	5	Unacceptable
							11/25/05	6	Unacceptable
							02/22/06	2	Unacceptable
							08/30/06	3	Unacceptable
							11/09/06	5	Unacceptable
							01/25/07	4	Unacceptable
	Courthouse Spring Branch	Potomac
			1ACTS*-DR5-SOS	38.85631	-77.1604	Site is located near intersection of Rt. 7 and Dulles Toll Road (267), where Ashgrove Lane crosses over the stream.  Downstream from bridge.
							04/26/05	4	Unacceptable
							11/13/05	5	Unacceptable
							04/23/06	3	Unacceptable
	Cub Run	Potomac
			1ACUB-CR1-SOS	38.835	-77.4653	where Cub Run crosses Route 29 (Lee Highway) in Centreville. Taking stream valley trail north/upstream from Rt. 29, site is at first place trail crosses stream
							04/28/01	7	Unacceptable
							02/23/02	6	Unacceptable
							04/06/02	8	Gray Zone (Indeterminate Conditions)
							02/03/03	9	Acceptable
							10/18/03	6	Unacceptable
							01/03/04	7	Unacceptable
							03/21/04	7	Unacceptable
							07/24/04	6	Unacceptable
							11/11/06	8	Gray Zone (Indeterminate Conditions)
			1ACUB-CR3-SOS	38.8828	-77.4697	approximately 50 '  North of Old Lee Bridge Road.  This area is north from where Old Lee Bridge intersects Braddock Road.
							04/22/01	7	Unacceptable
							04/06/02	9	Acceptable
							07/21/02	8	Gray Zone (Indeterminate Conditions)
			1ACUB-CR6-SOS	38.8011	-77.4699	Cub Run, adjacent to Bull Run/Occoquan Trail, under power lines
							04/22/01	9	Acceptable
							02/09/02	7	Unacceptable
							04/27/02	5	Unacceptable
							02/02/03	9	Acceptable
							04/27/03	6	Unacceptable
							08/02/03	8	Gray Zone (Indeterminate Conditions)
							11/10/03	6	Unacceptable
							02/14/04	8	Gray Zone (Indeterminate Conditions)
							04/18/04	7	Unacceptable
							08/01/04	11	Acceptable
							12/05/04	11	Acceptable
							11/05/05	9	Acceptable
							04/30/06	9	Acceptable
			1ACUB-CR8-SOS	38.8753	-77.4724	Walk upstream from where Cub Run crosses road
							03/23/03	7	Unacceptable
							02/29/04	4	Unacceptable
							05/22/04	5	Unacceptable
							08/08/04	8	Gray Zone (Indeterminate Conditions)
							11/20/04	6	Unacceptable
							01/21/06	4	Unacceptable
	Daniel's Run	Potomac
			1ADAN-ACC13-SOS	38.8454	-77.3013	Park at end of Tedrich Rd.  Walk 2 minutes to stream, monitor downstream of bridge
							04/19/03	4	Unacceptable
							07/28/03	5	Unacceptable
							02/21/04	4	Unacceptable
							04/17/04	6	Unacceptable
							10/21/04	5	Unacceptable
	Dead Run	Potomac
			1ADEA-P1-SOS	38.967	-77.1725	15-20m upstream from mouth
							09/11/01	6	Unacceptable
							06/21/06	2	Unacceptable
							07/19/06	5	Unacceptable
			1ADEA-P2-SOS	38.9663	-77.1732	50 m downstream
							09/17/01	7	Unacceptable
							06/21/06	4	Unacceptable
							07/20/16	7	Unacceptable
			1ADEA-P3-SOS	38.9652	-77.1737	70m downstream of GW Pkwy bridge, below falls
							09/17/01	7	Unacceptable
							06/22/06	5	Unacceptable
							07/20/16	6	Unacceptable
	Difficult Run	Potomac
			1ADIF-DR1-SOS	38.90333	-77.3189	Vale Rd. Bridge, North edge, several feet downstream from edge of bridge.
							02/03/02	3	Unacceptable
							04/25/02	6	Unacceptable
							07/12/02	6	Unacceptable
			1ADIF-DR25-SOS	38.88556	-77.3311	Site is located in Difficult Run Stream Valley Park, across from Blenheim, downstream from DR 26.  Park is located parallel to Miller Heights Road.
							04/02/01	7	Unacceptable
			1ADIF-DR26-SOS	38.88528	-77.3317	Site is located behind Gardener's home, at end of Lapham Dr.
							04/19/01	6	Unacceptable
							07/17/03	3	Unacceptable
							11/01/03	6	Unacceptable
			1ADIF-DR32-SOS	0	0	West Ox Road to Southfield Dr., left on Searsmont Drive, park on cul-de-sac.  Follow path from common area to stream
							04/22/03	9	Acceptable
							07/31/03	3	Unacceptable
							11/04/03	3	Unacceptable
							04/30/04	8	Gray Zone (Indeterminate Conditions)
							11/07/04	4	Unacceptable
	Elklick Run	Potomac
			1AELC-CR7-SOS	38.90405	-77.3777	Site is located on new park authority land, across the fields for about a mile.  Area is located near intersection of Pleasant Valley Road and Bradock Road.  ADC Map 10, k5).  Site is closed to the public.
							02/01/03	5	Unacceptable
							08/10/03	6	Unacceptable
							11/16/03	6	Unacceptable
							02/22/04	5	Unacceptable
							04/25/04	8	Gray Zone (Indeterminate Conditions)
	Holmes Run	Potomac
			1AHOR-CAM1-SOS	38.87639	-77.2183	100yrds north of Lee Highway, 50yrds east of Shreve Rd
							04/29/01	5	Unacceptable
							02/23/02	6	Unacceptable
	Horsepen Creek	Potomac
			1AHPR-HP01-SOS	0	0	trail off Lake Shore Dr. dead ends into riffle
							08/09/03	6	Unacceptable
							11/30/03	6	Unacceptable
							03/01/04	5	Unacceptable
	Horsepen Creek Unnamed Tributa	Potomac
			1AHPR-HP02-SOS	0	0	just downstream of crossing with Viking Drive