Pennsylvania
MS4 Stormwater Program Support
Engineering support for cities and counties meeting municipal separate storm sewer system permit requirements.
What the work involves
Many municipalities hold MS4 permits requiring public education, illicit discharge detection, construction and post-construction controls, and good housekeeping. Engineers help draft ordinances, map outfalls, inspect facilities, review development plans and prepare annual reports.
Local conditions we plan for
- Karst and sinkholes in limestone valleys (Lehigh Valley, Lancaster)
- Abandoned mine subsidence
- Landslides in western Pennsylvania (Pittsburgh)
- Frost depth and freeze thaw
Building code: 2021 IBC/IRC adopted at the state level (ICC adoption chart, April 2026).
When you need it
- Municipality covered by an MS4 permit
- Annual report due
- Outfall mapping
- Stormwater utility creation
Frequently asked questions
How much does mS4 Stormwater Program Support cost?
Across the US, mS4 Stormwater Program Support usually costs $10,000 to $200,000 per year. Estimate. Depends on community size and permit requirements.
How long does mS4 Stormwater Program Support take?
Plan on Ongoing from signed proposal to stamped deliverables, longer if a site visit, soil testing or a permit review cycle is involved.
Do I need a licensed PE for mS4 Stormwater Program Support?
In most US jurisdictions, yes. When the work needs a permit, the plans, calculations or report usually must be sealed by a Professional Engineer licensed in the state where the project is located. Every deliverable we issue for permit is sealed that way.
How do I verify an engineer's license in Pennsylvania?
Engineers practicing in Pennsylvania are licensed by the State Registration Board for Professional Engineers, Land Surveyors and Geologists. You can confirm a license number and its status in the board's public license search before you sign a contract.
Which building code applies in Pennsylvania?
2021 IBC/IRC adopted at the state level (ICC adoption chart, April 2026). Cities and counties can add local amendments, which is one reason to hire an engineer who works in your area.
What site problems do engineers see most in Pennsylvania?
Common issues include karst and sinkholes in limestone valleys (Lehigh Valley, Lancaster), abandoned mine subsidence, landslides in western Pennsylvania (Pittsburgh) and frost depth and freeze thaw.