Allentown, PA Environmental Rules: Erosion Control (2026)

Chapter 355, Land Development Controls, has governed earthmoving and site work in Allentown since it took effect July 3, 1973, and applies to any project whose scope exceeds the thresholds set in the chapter, plus existing development that becomes a hazard or public nuisance (§ 355-2). Before work begins, the developer must submit an erosion and sedimentation control plan prepared by a registered professional experienced in erosion control methods; the plan must analyze hydrology, geology, soils, topography and vegetation on the site (§ 355-8). 5 feet per second, and sedimentation basins need 7,000 cubic feet of capacity per tributary acre with a 24-inch freeboard, cleaned out once capacity drops to 5,000 cubic feet per acre.

Disturbed slopes and channels must be stabilized as soon as possible after final grading, and if stabilization isn't feasible or work pauses more than 20 days, interim stabilization measures are required immediately. Before the City issues a permit, it can require a cash or corporate bond covering the full estimated cost of the erosion and sediment control measures plus 1%, and where the work could endanger adjoining property, a certificate of insurance for at least $100,000 in property and personal injury coverage (§ 355-21). The City's authorized representative inspects work in progress and can order conformance or suspend work that doesn't match the approved plan (§ 355-24).

Appeals of an enforcement decision go to a City-appointed three-member Board of Appeals within 20 days, with further appeal to the Court of Common Pleas of Lehigh County (§ 355-23).