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Virginia Administrative Code
Title 9. Environment
Agency 25. State Water Control Board
Chapter 260. Water Quality Standards
9/21/2020

9VAC25-260-390. Potomac River Basin (Potomac River Subbasin).

Potomac River Subbasin

SEC.

CLASS

SP. STDS.

SECTION DESCRIPTION

1

II

a

Tidal tributaries of the Potomac River from Smith Point to Upper Machodoc Creek (Baber Point).

1a

III

All free flowing portions of tributaries to the Potomac River from Smith Point to the Route 301 Bridge in King George County unless otherwise designated in this chapter.

VII

Swamp waters in Section 1a

Mattox Creek and its tributaries from the head of tidal waters to their headwaters.

Monroe Creek and tributaries from the head of tidal waters at Route 658 to their headwaters.

Pine Hill Creek and its tributaries from the confluence with Rosier Creek to their headwaters.

Popes Creek and Canal Swamp (a tributary to the tidal portion of Popes Creek) and their tributaries from the head of tidal waters to their respective headwaters.

1b

III

b

All free flowing portions of tributaries to the Potomac River from the Route 301 Bridge in King George County to, and including, Potomac Creek, unless otherwise designated in this chapter.

1c

III

PWS,b

Potomac Creek and its tributaries from the Stafford County water supply dam (Abel Lake Reservoir) to their headwaters.

2

II

a

Tidal Upper Machodoc Creek and the tidal portions of its tributaries.

2a

III

Free flowing portions of Upper Machodoc Creek and its tributaries.

3

II

b

Tidal portions of the tributaries to the Potomac River from the Route 301 Bridge in King George County to Marlboro Point.

4

II

b

Tidal portions of the tributaries to the Potomac River from Marlboro Point to Brent Point (to include Aquia Creek and its tributaries).

4a

III

b

Free flowing portions of tributaries to the Potomac River in Section 4 up to the Aquia Sanitary District Water Impoundment.

4b

III

PWS,b

Aquia Creek from the Aquia Sanitary District Water Impoundment, and other tributaries into the impoundment, including Beaverdam Run and the Lunga Reservoir upstream to their headwaters.

5

II

b

Tidal portions of tributaries to the Potomac River from Brent Point to Shipping Point, including tidal portions of Chopawamsic Creek and its tidal tributaries.

5a

III

b

Free flowing portions of Chopawamsic Creek and its tributaries upstream to Quantico Marine Base water supply dam.

5b

III

PWS,b

Chopawamsic Creek and its tributaries above the Quantico Marine Base water supply intakes at the Gray and Breckenridge Reservoirs to their headwaters.

6

II

b, y

Tidal portions of tributaries to the Potomac River from Shipping Point to Chain Bridge.

7

III

b

Free flowing portions of tributaries to the Potomac River from Shipping Point to Chain Bridge, unless otherwise designated in this chapter.

7a

III

g

Occoquan River and its tributaries to their headwaters above Fairfax County Water Authority's water supply impoundment, unless otherwise designated in this chapter.

7b

III

PWS,g

The impounded waters of Occoquan River above the water supply dam of the Fairfax County Water Authority to backwater of the impoundment on Bull Run and Occoquan River, and the tributaries of Occoquan above the dam to points 5 miles above the dam.

7c

III

PWS,g

Broad Run and its tributaries above the water supply dam of the City of Manassas upstream to points 5 miles above the dam.

7d

(Deleted)

7e

III

PWS,g

Cedar Run and its tributaries from the Town of Warrenton's raw water intake to points 5 miles upstream (Fauquier County).

7f

III

PWS,g

The Quantico Marine Base Camp Upshur and its tributaries' raw water intake on Cedar Run (located approximately 0.2 mile above its confluence with Lucky Run) to points 5 miles upstream.

7g

III

PWS,g

The proposed impounded waters of Licking Run above the multiple purpose impoundment structure in Licking Run near Midland (Fauquier County) upstream to points 5 miles above the proposed impoundment.

7h

III

PWS,g

The proposed impounded waters of Cedar Run above the proposed multiple purpose impoundment structure on the main stem of Cedar Run near Auburn (Fauquier County), to points 5 miles above the impoundment.

8

III

PWS

Tributaries to the Potomac River in Virginia between Chain Bridge and the Monacacy River from their confluence with the Potomac upstream 5 miles, to include Goose Creek to the City of Fairfax's raw water intake, unless otherwise designated in this chapter.

8a

VI

PWS

Big Spring Creek and its tributaries in Loudoun County, from its confluence with the Potomac River upstream to their headwaters. (The temperature standard for natural trout water may be exceeded in the area above Big Spring and Little Spring at Routes 15 and 740 due to natural conditions). This section was given a PWS designation due to the Town of Leesburg's intake on the Potomac as referenced in Section 8b.

iii

Big Spring Creek from its confluence with the Potomac River upstream to Big Spring.

8b

III

PWS

Those portions of Virginia tributaries into the Potomac River that are within a 5 mile distance upstream of the Town of Leesburg's intake on the Potomac River, unless otherwise designated in this chapter.*

8c

III

PWS

Those portions of Virginia tributaries into the Potomac River that are within a 5 mile distance upstream of the County of Fairfax's intake on the Potomac River.*

9

III

Broad Run, Sugarland Run, Difficult Run, Tuscarora Creek, Sycolin Creek, and other streams tributary to streams in Section 8 from a point 5 miles above their confluence with the Potomac River to their headwaters, unless otherwise designated in this chapter.

9a

III

PWS

All the impounded water of Goose Creek from the City of Fairfax's water supply dam upstream to backwater, and its tributaries above the dam to points 5 miles above the dam.

9b

III

PWS

The Town of Round Hill's (inactive-early 1980s) raw water intake at the Round Hill Reservoir, and including the two spring impoundments located northwest of the town on the eastern slope of the Blue Ridge Mountains.

9c

III

PWS

Unnamed tributary to Goose Creek, from Camp Highroad's (inactive-late 1980s) raw water intake (Loudoun County) located in an old quarry to its headwaters.

9d

III

PWS

Sleeter Lake (Loudoun County).

10

III

Tributaries of the Potomac River from the Monacacy River to the West Virginia-Virginia state line in Loudoun County, from their confluence with the Potomac River upstream to their headwaters, unless otherwise designated in this chapter.

10a

III

PWS

North Fork Catoctin Creek and its tributaries from Purcellville's raw water intake to their headwaters.

10b

III

South Fork Catoctin Creek and its tributaries from its confluence with the North Fork Catoctin Creek to its headwaters.

11

IV

pH-6.5-9.5

Tributaries of the Potomac River in Frederick and Clarke Counties, Virginia, unless otherwise designated in this chapter.

V

Stockable Trout Waters in Section 11

***

pH-6.5-9.5

Back Creek (upper) from Rock Enon 4 miles upstream.

***

pH-6.5-9.5

Back Creek (lower) from Route 600 to the mouth of Hogue Creek - 2 miles.

***

hh

Hogue Creek from Route 679 upstream 6 miles to the Forks below Route 612.

vi

pH-6.5-9.5

Opequon Creek (in Frederick County) from its confluence with Hoge Run upstream to the point at which Route 620 first crosses the stream.

vi

pH-6.5-9.6

Turkey Run (Frederick County) from its confluence with Opequon Creek 3.6 miles upstream.

VI

Natural Trout Waters in Section 11

ii

pH-6.5-9.5

Bear Garden Run from its confluence with Sleepy Creek 3.1 miles upstream.

iii

pH-6.5-9.5

Redbud Run from its confluence with Opequon Creek 4.4 miles upstream.

11a

IV

pH-6.5-9.5

Hot Run and its tributaries from its confluence with Opequon Creek to its headwaters.

V

Stockable Trout Waters in Section 11a

vi

pH-6.5-9.5

Clearbrook Run from its confluence with Hot Run 2.1 miles upstream.

12

IV

ESW-6

South Branch Potomac River and its tributaries, such as Strait Creek, and the North Fork River and its tributaries from the Virginia-West Virginia state line to their headwaters.

V

Stockable Trout Waters in Section 12

vi

Frank Run from its confluence with the South Branch Potomac River 0.8 mile upstream.

vii

pH-6.5-9.5

South Branch Potomac River (in Highland County) from 69.2 miles above its confluence with the Potomac River 4.9 miles upstream.

VI

Natural Trout Waters in Section 12

ii

Blights Run from its confluence with Laurel Fork (Highland County) upstream including all named and unnamed tributaries.

ii

Buck Run (Highland County) from its confluence with Laurel Fork upstream including all named and unnamed tributaries.

ii

Collins Run from its confluence with Laurel Fork upstream including all named and unnamed tributaries.

ii

Laurel Fork (Highland County) from 1.9 miles above its confluence with the North Fork South Branch Potomac River upstream including all named and unnamed tributaries.

iii

pH-6.5-9.5

Laurel Run (Highland County) from its confluence with Strait Creek upstream including all named and unnamed tributaries.

ii

Locust Spring Run from its confluence with Laurel Fork upstream including all named and unnamed tributaries.

ii

Lost Run from its confluence with Laurel Fork upstream including all named and unnamed tributaries.

ii

Mullenax Run from its confluence with Laurel Fork upstream including all named and unnamed tributaries.

ii

Newman Run from its confluence with Laurel Fork upstream including all named and unnamed tributaries.

ii

Slabcamp Run from its confluence with Laurel Fork upstream including all named and unnamed tributaries.

iii

pH-6.5-9.5

Strait Creek (Highland County) from its confluence with the South Branch Potomac River upstream to the confluence of West Strait Creek.

Statutory Authority

§ 62.1-44.15 of the Code of Virginia; Clean Water Act (33 USC § 1251 et seq.); 40 CFR Part 131.

Historical Notes

Derived from VR680-21-08.4, eff. May 20, 1992; amended, Volume 13, Issue 12, eff. April 2, 1997; Volume 14, Issue 04, eff. December 10, 1997; Errata, 14:12 VA.R. 1937 March 2, 1998; amended, Virginia Register Volume 19, Issue 23, eff. August 27, 2003; Volume 20, Issue 09, eff. February 12, 2004; Volume 26, Issue 12, eff. February 1, 2010; Volume 32, Issue 26, eff. June 27, 2017.

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