Interstate Virginia Watersheds Central Shenandoah PDC Water Features USGS Standardized Hydrologic Unit System (HUC) 0 50 100 Miles Sources: USGS, NRCS, CSPDC, and Commonwealth of VA Topographically Nested Hierarchy Defined Set of Drainage Areas based on Surface Feature Size For planning purposes only. : (May, 2011)

Virginia Hydrologic Regions Virginia Hydrologic Sub-regions HUC 2 HUC 4

Region Name Frederick Subregion Name Frederick Winchester Winchester Clarke Clarke Mid Atlantic Region Loudoun Big Sandy-Guyandotte Kentucky-Licking Loudoun §¨¦495 Chowan-Roanoke Lower Chesapeake §¨¦495 Warren ¨¦§66 Arlington Warren ¨¦§66 Arlington Fairfax City Fairfax City Ohio Region Shenandoah Alexandria Shenandoah Alexandria Fairfax Cumberland Pee Dee Fairfax Fauquier Manassas City Fauquier Manassas City South Atlantic-Gulf Region Rappahannock Prince William Rappahannock Prince William Rockingham Page Delaware Potomac Rockingham Page Tennessee Region Culpeper Kanawha Upper Tennessee Culpeper Stafford Stafford Harrisonburg Madison Harrisonburg Madison Virginia Localities / Jurisdictions Highland Highland Fredericksburg King George Virginia Localities / Jurisdictions Fredericksburg King George Greene Orange Greene Orange Spotsylvania Spotsylvania Augusta Staunton Westmoreland Augusta Staunton Westmoreland Waynesboro ¨¦§95 Waynesboro ¨¦§95 Bath Albemarle Charlottesville Louisa Caroline Bath Albemarle Charlottesville Louisa Caroline Essex Richmond Essex Richmond ¨¦§64 Northumberland ¨¦§64 Northumberland Rockbridge Rockbridge 64 64 Alleghany ¨¦§ Fluvanna Accomack Alleghany ¨¦§ Fluvanna Accomack Clifton Forge Lancaster Clifton Forge Lancaster Lexington Nelson Hanover King And Queen Lexington Nelson Hanover King And Queen Covington City King William Covington City King William Buena Vista Goochland Buena Vista Goochland Middlesex Middlesex Amherst Amherst Buckingham Buckingham Powhatan Richmond City New Kent Powhatan Richmond City New Kent Botetourt Cumberland Botetourt Cumberland Henrico Gloucester Mathews Henrico Gloucester Mathews Craig ¨¦§64 Craig ¨¦§64 295 Northampton 295 Northampton Lynchburg City Chesterfield §¨¦ Charles City Lynchburg City Chesterfield §¨¦ Charles City Appomattox James City Appomattox James City Roanoke Amelia Roanoke Amelia Bedford City Hopewell City Williamsburg Bedford City Hopewell City Williamsburg Giles 581 York Giles 581 York Buchanan Salem City §¨¦ Buchanan Salem City §¨¦ Petersburg Poquoson City Petersburg Poquoson City Roanoke City Campbell Prince Edward Prince George Roanoke City Campbell Prince Edward Prince George ¨¦§81 ¨¦§81 Bedford Nottoway Surry Newport News Bedford Nottoway Surry Newport News Montgomery Montgomery Dickenson Tazewell Bland Radford City Dinwiddie Hampton City Dickenson Tazewell Bland Radford City Dinwiddie Hampton City Wise 77 Wise 77 ¨¦§ Pulaski Charlotte ¨¦§ Pulaski Charlotte 664 664 Franklin Lunenburg Sussex §¨¦Norfolk City Franklin Lunenburg Sussex §¨¦Norfolk City Isle Of Wight 264 Isle Of Wight 264 Norton City Russell Floyd 85 95 Norton City Russell Floyd 85 95 Wythe ¨¦§ ¨¦§ Portsmouth §¨¦ Wythe ¨¦§ ¨¦§ Portsmouth §¨¦ Virginia Beach Virginia Beach Smyth Pittsylvania Smyth Pittsylvania Halifax Brunswick Halifax Brunswick Southampton Suffolk City Southampton Suffolk City Emporia City Chesapeake Emporia City Chesapeake Scott Washington Carroll South Boston Mecklenburg Franklin City Scott Washington Carroll South Boston Mecklenburg Franklin City Lee Martinsville Lee Martinsville Grayson Galax City Patrick Greensville Grayson Galax City Patrick Greensville 77 77 Bristol City ¨¦§ Bristol City ¨¦§ Henry Danville City Henry Danville City

Virginia Hydrologic Basin Virginia Hydrologic Sub-basin HUC 6 HUC 8 Basin Name HUC 8 - Sub-basin ID & Name 5 Frederick Frederick 1.Albemarle 18.Lynnhaven-Poquoson 35.Rivanna Winchester 2.Appomattox 19.Mattaponi 36.Roanoke Rapids Albemarle-Chowan New Jersey Coastal Clarke Loudoun 37 Loudoun 3.Banister 20.Maury 37.Shenandoah Clarke 26 §¨¦495 §¨¦495 Big Sandy Potomac 4.Blackwater 21.Meheriin 38.South Branch Potomac Fairfax Warren ¨¦§66 Arlington Warren ¨¦§66 Arlington Fairfax City Fairfax City Shenandoah Alexandria 5.Cacapon-Town 22.Middle James-Buffalo 39.South Fork Holston 30 Alexandria 25 French Broad-Holston Roanoke Fairfax 6.Chincoteague 23.Middle James-Willis 40.South Fork Shenandoah Fauquier Manassas City Shenandoah Fauquier Manassas City James Upper Cumberland Rappahannock Prince William 7.Chowan 24.Middle New 41.Tug Rappahannock Prince William Rockingham Page 8.Eastern Lower Delmarva 25.Middle Potomac-Anacostia-Occoquan 42.Upper Clinch, Tennessee, Virginia Rockingham Page 34 Kanawha Upper Pee Dee Culpeper 9.Great Wicomico-Plankatank 26.Middle Potomac-Catoctin 43.Upper Cumberland Culpeper Stafford 38 Stafford Harrisonburg Madison 10.Greenbrier 27.Middle Roanoke 44.Upper Dan Harrisonburg Madison Highland 11.Hampton Roads 28.North Fork Holston 45.Upper James Highland Fredericksburg Kentucky Upper Tennessee Fredericksburg King George 40 King George Greene Greene Orange 12.Holston 29.North Fork Kentucky 46.Upper Levisa Orange Spotsylvania Spotsylvania Staunton Westmoreland Lower Chesapeake Augusta Staunton Westmoreland 13.Lower Chesapeake Bay 30.North Fork Shenandoah 47.Upper New Augusta 35 ¨¦§95 ¨¦§95 Waynesboro 14.Lower Dan 31.Nottoway 48.Upper Roanoke Waynesboro Charlottesville 17 16 Bath Albemarle Charlottesville Louisa Caroline Bath Albemarle 6 Essex Richmond 20 Essex Richmond Virginia Localities / Jurisdictions ¨¦§64 15.Lower James 32.Pamunkey 49.Upper Yadkin ¨¦§64 Caroline Northumberland 10 45 Louisa Northumberland Rockbridge 16.Lower Potomac 33.Powell 50.Western Lower Delmarva Rockbridge 19 64 64 32 Alleghany ¨¦§ Fluvanna Accomack Alleghany ¨¦§ Fluvanna Clifton Forge Lancaster 17.Lower Rappahannock 34.Rapidan-Upper Rappahannock 51.York Clifton Forge Lancaster Accomack Lexington Nelson Hanover King And Queen Lexington Nelson Hanover King And Queen Covington City King William Covington City King William Buena Vista Goochland Buena Vista Goochland 50 Middlesex 22 Middlesex Virginia Localities / Jurisdictions 23 8 Amherst Botetourt Amherst Buckingham Buckingham Richmond City Powhatan Richmond City New Kent Powhatan New Kent 9 Botetourt Cumberland Cumberland Henrico Gloucester Mathews Henrico 51 Gloucester Mathews Craig ¨¦§64 Craig 15 ¨¦§64 295 Northampton 295 Northampton Lynchburg City Chesterfield §¨¦ Charles City Lynchburg City §¨¦ Charles City Appomattox James City 41 Appomattox James City Roanoke Amelia Roanoke Amelia Chesterfield Bedford City Hopewell City Williamsburg Bedford City 2 Hopewell City Williamsburg Giles 581 York Giles 581 York Buchanan Salem City §¨¦ Buchanan §¨¦ Petersburg Poquoson City Petersburg Poquoson City Roanoke City Campbell Prince Edward Prince George Roanoke City Campbell Prince Edward Prince George 13 ¨¦§81 ¨¦§81 Bedford Nottoway Surry Newport News 46 24 Bedford Nottoway Surry Newport News Montgomery 29 Montgomery Dickenson Tazewell Bland Radford City Dinwiddie Hampton City Tazewell Bland Radford City 48 Dinwiddie Hampton City Wise §77 Pulaski Dickenson §77 27 ¨¦ Charlotte ¨¦ Charlotte Norfolk City 664 Wise 664 Franklin §¨¦Norfolk City Pulaski Franklin §¨¦ Lunenburg Sussex Isle Of Wight Lunenburg 31 Sussex 4 Isle Of Wight 18 264 42 264 Norton City Russell Floyd 85 95 §¨¦ Norton City Floyd 85 95 §¨¦ Wythe ¨¦§ ¨¦§ Portsmouth 28 Wythe ¨¦§ ¨¦§ Portsmouth Virginia Beach Russell 47 3 Smyth Pittsylvania Pittsylvania 11 Virginia Beach Halifax Brunswick Smyth Halifax Southampton Suffolk City Southampton Suffolk City 43 33 Mecklenburg 21 Emporia City Emporia City Chesapeake Scott Washington Carroll South Boston Mecklenburg Franklin City Scott Washington 39 Carroll South Boston Brunswick Franklin City 1 Lee Martinsville Lee 44 Martinsville Grayson Galax City Patrick Greensville Grayson Galax City Patrick 36 Greensville 7 Chesapeake 77 77 14 Bristol City ¨¦§ Bristol City ¨¦§ Henry Danville City 12 49 Henry Danville City

CSPDC Hydrologic Watersheds Virginia Hydrologic Sub-watersheds & PDC's HUC 10 18 HUC 12 HUC 10 - Watershed ID & Name Planning Districts 11, Virginia's Region 2000 Local Government Council 1, Lenowisco Planning District Commission 12, West Piedmont Planning District Commission 1, Back Creek-Middle Jackson River 15, Middle Maury River 7 2, Cumberland Plateau Planning District Commission 13, Southside Planning District Commission 2, Calfpasture River 16, Naked Creek-South Fork Shenandoah River 19 5 Rockingham 3, Mount Rogers Planning District Commission 14, Commonwealth Regional Council ¦¨§81 §¨¦495 3, Cedar Creek-James River 17, North Fork South Branch Potomac River 17 4, New River Valley Planning District Commission 15, Richmond Regional Planning District Commisssion ¨¦§66 6 4, Christians Creek 18, Shoemaker River-North Fork Shenandoah River 27 5, Roanoke Valley-Alleghany Regional Commission 16, George Washington Regional Commission 7 8 Harrisonburg 5, Dry River 19, Smith Creek 6, Central Shenandoah Planning District Commission 17, Northern Neck Planning District Commission 20 6, Hawksbill Creek-South Fork Shenandoah River 20, South Fork South Branch Potomac River 26 16 7, Northern Shenandoah Valley Regional Commission 18, Middle Peninsula Planning District Commission 13 7, Linville Creek-North Fork Shenandoah River 21, South River Highland 8, Northern Virginia Regional Commission 19, Crater Planning District Commission 23 9 8, Little Calfpasture River-Upper Maury River 22, South River 9, Rappahannock-Rapidan Regional Commission 22, Accomack-North Hampton Planning District Commission 10, Thomas Jefferson Planning District Commission 23, Hampton Roads Planning District Commission 9, Lower Cowpasture River 23, Upper Cowpasture River 24 Augusta 12 10, Lower Jackson River 24, Upper Jackson River 1 25 HUC 12 Sub-watershed Boundaries ¨¦§95 11, Lower Maury River 25, Upper Middle River 16 Staunton 6 12, Lower Middle River 26, Upper North River ¨¦§64 14 ¦¨§64 17 13, Lower North River 27, Upper South Branch Potomac River ¨¦§64 10 4 Waynesboro Bath 14, Middle Cowpasture River 2 21 18 8 22 10 9 HUC 12 Sub-watershed Boundaries 5 15 ¨¦§64 §¨¦295 Rockbridge 22 ¦¨§64 §¨¦581 15 11 ¨¦§81 14

Lexington ¨¦§77 2 4 19 §¨¦664 Buena Vista 264 11 ¨¦§85 ¨¦§95 §¨¦ ¦¨§81 1 3 12 23 3 ¨¦§77 13