Arizona
Wetland Delineation and Section 404 Permitting
Wetland delineations and Army Corps Section 404 and state permits for filling or crossing wetlands and streams.
What the work involves
Placing fill in waters of the United States, including many wetlands, requires a Clean Water Act Section 404 permit from the US Army Corps of Engineers, plus state water quality certification. A wetland scientist delineates boundaries, and civil engineers design crossings and site layouts to avoid and minimize impacts, prepare permit drawings, and design mitigation where needed.
Local conditions we plan for
- Expansive and collapsible desert soils
- Monsoon flash flooding and washes
- Land subsidence and earth fissures from groundwater pumping
- Extreme heat affecting pavements and materials
Building code: No statewide IBC/IRC; codes adopted by local jurisdictions (ICC adoption chart, April 2026).
When you need it
- Site has wet areas, streams or ponds
- Road, driveway or utility must cross a stream or wetland
- Lender or buyer due diligence
- Corps or state agency enforcement letter
Frequently asked questions
How much does wetland Delineation and Section 404 Permitting cost?
Across the US, wetland Delineation and Section 404 Permitting usually costs $2,000 to $50,000. Estimate. Simple delineations cost a few thousand dollars; individual permits with mitigation are much more.
How long does wetland Delineation and Section 404 Permitting take?
Plan on Weeks for nationwide permits; often many months for individual permits 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 wetland Delineation and Section 404 Permitting?
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 Arizona?
Engineers practicing in Arizona are licensed by the Arizona State Board of Technical Registration. 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 Arizona?
No statewide IBC/IRC; codes adopted by local jurisdictions (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 Arizona?
Common issues include expansive and collapsible desert soils, monsoon flash flooding and washes, land subsidence and earth fissures from groundwater pumping and extreme heat affecting pavements and materials.