This inventory is an effort to identify each township’s most prominent through valley, or through valleys and many less prominent through valleys are not included. The through valleys provide evidence of former drainage routes that can best be explained in the context of massive and prolonged southwest oriented floods that were sequentially captured by headward […]
Category archives for Delaware-Schuylkill drainage divide
Two completely different Valley Creeks originate almost adjacent to each other in the South Valley Hills near Glenloch (between Malvern and Exton) and then flow parallel to each other in a north direction in deep narrow valleys down a steep slope onto the west-southwest to east-northeast oriented Chester Valley floor where the eastern Valley Creek […]
The Paoli-Thorndale Regional Rail Line is unique among the SEPTA Regional Rail Lines in that between Ardmore and Malvern it follows the Schuylkill-Delaware River drainage divide and further west crosses the Schuylkill-Delaware River divide along the Chester Valley south wall. The Paoli-Thorndale Regional Rail Line, which was originally the Pennsylvania Railroad main line and which […]
Overview: Along its 21-mile distance SEPTA’s Warminster Regional Rail line ascends from sea level to approximately 320 feet and crosses the Delaware-Schuylkill River drainage divide twice as it travels from the Tookany Creek drainage basin to the Wissahickon Creek drainage basin and then to the Pennypack Creek drainage basin. Along the way observant riders can […]
Introduction: Trains on the Norristown High Speed Line (NHSL) require approximately 30 minutes to travel 13.4 miles from SEPTA’s 69th Street Terminal to the Norristown Transportation Center, yet that relatively short trip involves crossing several creeks and a major river, climbing up and down as several drainage divides are crossed, passing through a water gap, […]
A shallow, but interesting through valley crosses the Schuylkill River-Delaware River drainage divide at the Main Line community of Strafford and links east oriented Gulph Creek, which flows to the Schuylkill River, with south oriented Darby Creek tributaries, with Darby Creek eventually reaching the Delaware River. The drainage divide elevation at the Strafford through valley […]
The town of Radnor is located Schuylkill River-Delaware River drainage divide between Gulph Creek, which flows to the Schuylkill River, and Ithan Creek, which flows to Darby Creek, which then flows to the Delaware River. The drainage divide elevation at the Radnor saddle location is between 410 and 420 feet while the drainage divide rises […]
The towns of Villanova, Rosemont, and Bryn Mawr are located Schuylkill River-Delaware River drainage divide with Rosemont being located on the divide between Mill Creek, which flows to the Schuylkill River, and Meadowbrook Run, which flows to Darby Creek, which then flows to the Delaware River. The drainage divide elevation at the Rosemont saddle location […]
A well defined northeast-to-southwest oriented through valley links the northwest oriented Deer Run valley with the southwest oriented East Branch Perkiomen Creek valley. The Deer Run valley drains to southeast, east, and south oriented Tohickon Creek, which flows to the southeast oriented Delaware River and the East Branch Perkiomen Creek drains to south and southwest […]
Morris Run is an East Branch Perkiomen Creek tributary located between Perkasie and Dublin in Bucks County and originates as a northeast oriented stream before turning in north, west, north, and northwest directions to join southwest oriented East Branch Perkiomen Creek. Most Morris Run tributaries flow in southwest directions to join north oriented Morris Run […]
Shallow wind gaps in Souderton and Telford area link headwaters of northeast and southwest oriented Perkiomen Creek tributaries and provide evidence of what were diverging and converging flood flow channels. Evidence of former channels include the present day southwest oriented East Branch Perkiomen Creek valley, a shallow wind gap in Telford linking a northeast oriented […]
The Chester Valley is a narrow lowland extending from near the southeast oriented Susquehanna River valley in an east-northeast direction almost to the southeast oriented Schuylkill River valley. The Pennsylvania Geologic Survey web applications map shows the Chester Valley to be underlain by easily eroded carbonate rocks. The Chester Valley north rim (North Valley Hills) […]
While there is no common point the Susquehanna, Delaware, and Schuylkill River drainage basins are very close to each other in the Honey Brook Basin, which is located between Welsh Mountain and the Baron Hills. Pequea Creek originates in the Honey Brook Basin and after flowing in a southeast direction turns to flow in a […]
The Honey Brook basin as defined here is located between Welsh Mountain and the Baron Hills and serves as the headwaters region for the East and West Branches of Brandywine Creek, the South Branch of French Creek, and Pequea Creek with Brandywine Creek flowing to the Delaware River, French Creek to the Schuylkill River, and […]
The Schuylkill River flows in a southeast direction into Philadelphia and just after flowing under the Roosevelt Avenue Bridge makes an abrupt turn to flow in a southwest direction. After flowing in a southwest direction the Schuylkill River flows under the Columbia Bridge and just west of the East Park Reservoir makes another abrupt turn […]
The Laverock Wind Gap with a floor elevation slightly greater than 350 feet is located just south of the northeast trending Edge Hill Ridge and links the east oriented Tacony Creek headwaters valley with a west oriented Wissahickon Creek tributary valley (which drains to the Wissahickon Gorge north entrance). Wissahickon Creek drains to the southeast […]
Route 309 and an abandoned rail line cross Edge Hill Ridge at the Seminary Wind Gap, with Westminster Theological Seminary being located on the wind gap northeast rim. The Seminary Wind Gap is one of three wind gaps cut into the Wissahickon Creek-Tacony Creek drainage divide along the northeast oriented Edge Hill Ridge with the […]
The SEPTA Lansdale line between Glenside and North Hills and Limekiln Pike cross Edge Hill Ridge at the Edge Hill Wind Gap. The Edge Hill Wind Gap is one of three wind gaps cut into the Wissahickon Creek-Tacony Creek drainage divide along the northeast oriented Edge Hill Ridge with the other two wind gaps being […]
The SEPTA Ardsley station is located on the Ardsley Wind Gap floor and Jenkintown Road also crosses the Edge Hill Ridge at the Ardsley Wind Gap. The Ardsley Wind Gap is the deepest of three noticeable wind gaps or notches cut into the Wissahickon Creek-Tacony Creek drainage divide along the northeast oriented Edge Hill Ridge […]
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