Conococheague Creek

Conococheague Creek near its mouth in Williamsport, Maryland, as viewed upstream from an aqueduct on the towpath trail in the Chesapeake and Ohio Canal National Historical Park

Conococheague Creek, a tributary of the Potomac River, is a free-flowing stream that originates in Pennsylvania and empties into the Potomac River near Williamsport, Maryland. It is 80 miles (129 km) in length,^[1] with 57 miles (92 km) in Pennsylvania and 23 miles (37 km) in Maryland. The watershed of Conococheague Creek has an area of approximately 566 square miles (1,470 km²), out of which only 65 square miles (170 km²) (12% of the area) are in Maryland.

The word "Conococheague" is translated from the Delaware Indian spoken language to mean "Water of many turns". The Conococheague, or Connogochegue, as it was known at the time, was the northernmost extent of the range along the Potomac within which Congress in the Residence Bill of 1790 authorized the establishment of the Federal District, known as the District of Columbia. By presidential proclamation, George Washington placed the District at the lower end of the range, near the "Eastern Branch", later Anacostia River, which marked the southernmost extent of the Residence Bill's range.

The water divide between Conococheague Creek and Conodoguinet Creek is sometimes used as the boundary between the Hagerstown Valley and the Cumberland Valley.

Main stem above the West Branch

Conococheague Creek, above its confluence with its West Branch, is sometimes referred to as the East Branch Conococheague Creek. At 53.1 miles (85.5 km), the "East Branch" is 7 miles (11 km) shorter than the West Branch.^[1] It rises in the South Mountain range of south-central Pennsylvania, forming in northwestern Adams County between East Big Flat Ridge and Piney Mountain. The creek flows southwest, turning west at Caledonia State Park, and continues past Fayetteville into the Great Appalachian Valley, turning southwest at Chambersburg and flowing west of Greencastle.

The creek from Fayetteville to its confluence with Back Creek near Williamson is very polluted from farm runoff. Over the past 30 years there has been a steady decline in the number of available native fish species, such as yellow perch, eel, horned chub, calico bass, rock bass, and white sucker, and overall water quality due to sediment collection on the bottom, thereby severely limiting the ability of these native species to spawn. This in turn has made parts of the lower East Branch ideal for catching huge crayfish at night; however, the food value of this species, due to pollution, is dubious at best.

West Branch Conococheague Creek

The West Branch flows for 60.0 miles (96.6 km),^[1] almost the entire length of western Franklin County, before joining the main branch near the borough of Greencastle. The West Branch is the more pure of the two, owing mostly to the fact that a large portion of it runs through wilderness, making for very fine smallmouth bass, warmouth and rock bass fishing. However, there are a few small sewage treatment plants on the lower West Branch, starting at Fort Loudon, that make the lower West Branch less hospitable to native species' spawning. Northern pike and pickerel have been caught in the creek.

The West Branch flows southwest along the Tuscarora Trail to around Fort Loudon, then turns south, and finally southeast, joining the main stem 8.2 kilometres (5.1 mi) north of the Mason–Dixon Line.

Main stem below the West Branch

Conococheague Creek continues south into Maryland and enters the Potomac near Williamsport, where the Great Philadelphia Wagon Road crossed the river at William's Ferry, continuing on to Winchester, Virginia. The crossing is where Braddock's forces crossed the Potomac after leaving Frederick on their way to Winchester. The Tuscarora Trail crosses the Conococheague.

See also

• List of Maryland rivers
• List of rivers of Pennsylvania

References

1. ^ ^{a b c} U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed August 15, 2011

External links

• U.S. Geological Survey Geographic Names Information System: Conococheague Creek
• Conococheague Creek at Maryland Department of the Environment

Potomac River system Cities and towns | Bridges | Islands | Tributaries | Variant names District of Columbia | Maryland | Pennsylvania | Virginia | West Virginia Streams shown as: Major tributaries • subtributaries • (subsubtributaries) • (subsubsubtributaries)

Tidal Potomac River Gulf Branch | Donaldson Run | Maddox Branch | Windy Run | Spout Run | Foundry Branch | Rock Creek | Boundary Channel | Tiber Creek | Rocky Run | Washington Channel | Anacostia River • Pope Branch • Watts Branch • Hickey Run • Northwest Branch • (Sligo Creek) • Northeast Branch • (Paint Branch) | Four Mile Run | Oxon Creek | Hunting Creek • Cameron Run | Broad Creek | Henson Creek | Swan Creek | Piscataway Creek | Little Hunting Creek | Dogue Creek | Accotink Creek • Daniels Run | Pohick Creek | Pomonkey Creek | Occoquan River • Bull Run • Broad Run • Cedar Run | Neabsco Creek | Powells Creek | Mattawoman Creek | Chicamuxen Creek | Quantico Creek | Little Creek | Chopawamsic Creek | Tank Creek | Aquia Creek | Potomac Creek • Accokeek Creek | Nanjemoy Creek | Port Tobacco River | Popes Creek (Maryland) | Gambo Creek | Piccowaxen Creek | Upper Machodoc Creek | Cuckold Creek | Wicomico River | Monroe Creek | Mattox Creek | Popes Creek (Virginia) | St. Marys River | Yeocomico River | Coan River | Hull Creek Upper Potomac River North Branch Potomac River | South Branch Potomac River | Town Creek | Little Cacapon River • North Fork Little Cacapon River • South Fork Little Cacapon River | Fifteenmile Creek | Sideling Hill Creek | Cacapon River • Lost River • Trout Run • Capon Springs Run • Dillons Run • Edwards Run • Mill Branch • North River • (Grassy Lick Run) • (Tearcoat Creek) • (Bearwallow Creek) | Sir Johns Run | Warm Spring Run | Tonoloway Creek • Little Tonoloway Creek | Sleepy Creek • Meadow Branch | Licking Creek | Cherry Run | Back Creek • Hogue Creek • Isaacs Creek • Tilhance Creek | Little Conococheague Creek | Conococheague Creek • Back Creek | Opequon Creek • Abrams Creek • Mill Creek • Middle Creek • Tuscarora Creek (West Virginia) | Antietam Creek | Shenandoah River | Little Catoctin Creek | Catoctin Creek (Virginia) | Catoctin Creek (Maryland) | Tuscarora Creek (Maryland) | Monocacy River • Rock Creek • Marsh Creek • Alloway Creek • Toms Creek • (Middle Creek) • Double Pipe Creek • (Big Pipe Creek) • (Little Pipe Creek) • Owens Creek • Tuscarora Creek • Carroll Creek • Linganore Creek • Israel Creek • Double Pipe Creek • Bush Creek • Ballenger Creek • Bennett Creek | Little Monocacy River | Goose Creek • Little River | Broad Run (Virginia) | Sugarland Run | Broad Run (Maryland) | Seneca Creek • Dry Seneca Creek • Little Seneca Creek • Great Seneca Creek | Difficult Run | Cabin John Creek | Dead Run | Little Falls Branch | Pimmit Run | Rock Run | Watts Branch | Muddy Branch Shenandoah River North Fork Shenandoah River • Cedar Creek • Smith Creek | South Fork Shenandoah River • North River • (Middle River) • South River North Branch Potomac River Stony River | Abram Creek | Savage River | Georges Creek • Laurel Run | New Creek | Limestone Run | Warrior Run | Wills Creek • Brush Creek • Little Wills Creek | Evitts Creek | Patterson Creek • Mill Creek | Dans Run | Green Spring Run South Branch Potomac River North Fork South Branch Potomac River • Mill Creek • Seneca Creek | South Fork South Branch Potomac River • Kettle Creek | Lunice Creek | Mill Run | Mill Creek | Big Run | Buffalo Creek Lakes and reservoirs Lake Accotink | Lake Anne | Lake Artemesia | Lake Bernard Frank | Lake Braddock | Breckenridge Reservoir | Brushy Fork Lake | Burke Lake | Dalecarlia Reservoir | Georgetown Reservoir | Jennings Randolph Lake | Kingman Lake | Little Seneca Lake | McMillan Reservoir | Mount Storm Lake | Lake Needwood | Sleepy Creek Lake | Stony River Reservoir | Tidal Basin | Trout Pond | Warden Lake

Coordinates: 39°36′02″N 77°49′42″W / 39.60056°N 77.82833°W / 39.60056; -77.82833