Archives for April, 2015

Barbed tributaries and aligned drainage near Media, Delaware County, PA

Media (Delaware County, PA) is located on the relatively narrow drainage divide between south oriented Crum Creek and south-southeast oriented Ridley Creek. Northeast oriented and barbed tributaries drain to Crum Creek and to Ridley Creek from the west and tributaries to both creeks from the east are oriented in southwest directions. The northeast and southeast […]

Crum Creek-Ridley Creek drainage divide near Geist Reservoir, Delaware County, PA

North of Media (Delaware County, PA) Crum Creek and Ridley Creek flow in closely spaced southeast oriented valleys and then turn to flow in south-southeast oriented valley. Geist Reservoir is an artificial lake flooding a Crum Creek valley segment. Both Crum Creek and Ridley Creek in this region are joined by northeast and north-northeast oriented […]

Landforms seen along SEPTA’s Norristown High Speed Line

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, […]

Strafford through valley linking Darby and Gulph Creeks

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 […]

Radnor saddle on the Schuylkill River-Delaware River drainage divide

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 […]

Rosemont saddle on the Schuylkill River-Delaware River drainage divide

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 […]

Schuylkill River-Mill Creek Drainage Divide area east and north of Bryn Mawr

Mill Creek originates just north of the Villanova University campus and flows in an east direction along the north sides of the Rosemont College and Bryn Mawr campuses until it turns to flow in an east-southeast and a south-southeast direction before making an abrupt turn to flow in a northeast direction to join the southeast […]