If your project will disturb an acre or more of land, or less as part of a larger common plan of development or sale, state construction stormwater permit coverage usually applies before clearing and grading begin. Cypress Environment & Infrastructure helps private developers, builders, and contractors on the Gulf Coast get coverage, keep the plan and inspections current, and close the permit when the site is stabilized.
Inspections and oversight are led by a Certified Professional in Erosion and Sediment Control (CPESC), with licensed Professional Engineers (environmental and civil) on staff. We work from Biloxi, Mobile, and Pensacola, close to sites in Mississippi, Alabama, Florida, and Louisiana.
When to bring in a construction stormwater consultant
A consultant is most useful before earthwork starts, when the plan must match the site and the permit, or when inspections and records have fallen behind. Triggers include disturbance of one acre or more (or a smaller tract in a larger common plan), a lender or local permit that requires state NPDES coverage, phased work where controls change, open corrective actions, or Notice of Termination (NOT) at final stabilization.
County and city land-disturbance permits, and discharges into a municipal separate storm sewer system (MS4), can add plan review or inspection conditions beside the state permit. See MS4 permit compliance for Gulf Coast cities. The state construction general permit remains the NPDES layer for construction stormwater discharges.
Permit coverage by Gulf Coast state
Each state runs its own construction general permit. Confirm current terms for your coverage; programs have been reissued or proposed for revision recently.
Alabama: ADEM ALR100000
ADEM’s construction general permit ALR100000 (reissued effective April 1, 2026) covers land disturbance of one acre or more, and smaller sites that are part of a larger common plan. Operators submit a Notice of Intent (NOI) through AEPACS. A Construction Best Management Practices Plan (CBMPP) must be developed before the NOI, prepared and certified by a Qualified Credentialed Professional (QCP). ADEM lists the CPESC among credentials recognized for a QCP. The Alabama QCI certification is held by a permittee or a permittee’s employee, so inspections by an outside firm are performed by a QCP or a qualified person under a QCP’s direct supervision.
Florida: FDEP Construction Generic Permit
Florida’s Construction Generic Permit covers construction that disturbs one acre or more (or less as part of a larger common plan) and discharges to surface waters or an MS4. Operators develop a Stormwater Pollution Prevention Plan (SWPPP), then submit an NOI at least two calendar days before construction begins. Coverage is separate from an Environmental Resource Permit or a local stormwater permit. FDEP has proposed a revised CGP (draft dated July 2026); until it is adopted, the current permit governs.
Mississippi: MDEQ construction general permits
MDEQ issues a Large Construction General Permit (MSR10) for five acres or more, and a Small Construction General Permit (MSR15) for one to less than five acres (or less as part of a larger common plan in those ranges). Large sites submit an NOI. Small sites complete a Small Construction Notice of Intent and a SWPPP, and submit them to MDEQ only if requested; both must stay available on site or locally. The large permit currently runs through January 31, 2027. The small permit has been administratively continued past its April 30, 2024 expiration while MDEQ works on reissuance.
Louisiana: LDEQ LAR100000 and LAR200000
LDEQ’s large construction general permit LAR100000 (reissued October 1, 2024; expires September 30, 2029) covers five acres or more, including smaller tracts in a larger common plan that will ultimately disturb five acres or more. Operators develop a SWPPP before filing the CSW-G NOI; the SWPPP is not mailed with the NOI. Coverage is self-implementing 48 hours after a complete NOI with fees is postmarked or hand-delivered. The small construction general permit LAR200000 covers one to less than five acres and requires a SWPPP and a completion report at final stabilization.
What the consultant prepares and keeps current
Alabama uses a CBMPP; Florida, Mississippi, and Louisiana use a SWPPP. The plan covers pollution sources, erosion and sediment controls, pollution prevention, inspection schedules, and records. It must match the site and be updated when conditions change. See what is a SWPPP.
The consultant helps assemble maps, acreage, receiving waters, and operator certifications, then files the NOI. Priority sites may need the plan submitted with the NOI or on request.
Permits require routine and rain-triggered inspections by someone the permit recognizes as qualified. Under the current Alabama permit, full site inspections are required monthly and after 0.75 inches or more of precipitation in 24 hours. Under the current Florida CGP, inspections are required at least once every seven calendar days and within 24 hours of the end of a storm of 0.50 inches or more, with corrective actions completed no later than seven calendar days after an issue is identified.
Cypress performs construction stormwater compliance inspections for private landowners, developers, builders, and contractors in Baldwin and Mobile Counties, Alabama, and Escambia County, Florida. See construction stormwater inspections. Findings should include a dated report, photo log, and corrective-action list. Keep rain logs, reports, plan revisions, and NOI acknowledgments in the site file; Florida’s CGP requires records for three years after final stabilization and NOT submittal.
When the site meets final stabilization and regulated discharges have stopped (or are authorized under another permit), the operator files an NOT or follows the state’s automatic-termination rules. A consultant confirms stabilization criteria and closes the file cleanly.
What happens when inspections or records lapse
A missed inspection is noncompliance even if the controls look intact. Gaps show up in an agency file review, a lender request, or a complaint-driven visit. Inspect as soon as possible, document the gap honestly, complete overdue repairs, and restore the rain log and report sequence. Invented or backdated records create separate liability.
Federal civil penalties under the Clean Water Act are set by statute and adjusted over time; states also use stop-work orders and permit action. Fixed per-day fine ranges are not quoted here because they depend on the case and current law. The reliable defense is a current plan, on-schedule inspections, closed corrective actions, and a complete file.
How this fits with other stormwater work
Construction stormwater coverage sits next to permanent stormwater design, stormwater management for the finished site, and broader types of environmental permits. The consultant’s job is the CGP, CBMPP, or SWPPP path through active disturbance; permanent ponds, ERP design, or wetland permitting are related scopes that may run in parallel.
Frequently asked questions
Do I need coverage if I disturb less than one acre?
Often not for a stand-alone tract under one acre. If the work is part of a larger common plan that will disturb one acre or more in total, coverage usually applies. Mississippi and Louisiana also split small and large construction at five acres, with different filing rules.
When should the consultant start relative to grading?
Before the NOI. Alabama requires the CBMPP before the NOI. Florida requires the SWPPP before coverage and the NOI at least two days before construction. Starting the plan after clearing has begun is already behind the permit sequence.
Who can inspect my Alabama or Florida site?
In Alabama, a QCI, a QCP, or a qualified person under a QCP’s direct supervision; outside firms typically inspect as a QCP or under a QCP. In Florida, a qualified inspector as defined in the FDEP CGP, with name and qualifications on each report.
What is the difference between a CBMPP and a SWPPP?
They serve the same role: the site-specific plan required by the construction stormwater permit. Alabama uses CBMPP; Florida, Mississippi, and Louisiana use SWPPP. Contents and update rules follow each state’s permit.
Can coverage stay open after the site is finished?
It should not. File the NOT (or follow automatic termination where the state uses it) once final stabilization is met. Leaving an open permit after the operator no longer controls the site leaves responsibility unclear.
Talk with us about your site
Starting a site, renewing coverage, or catching up on inspections? Contact Cypress Environment & Infrastructure with the site address, disturbed acreage, state, and any existing permit number. We will review the coverage path, plan needs, and inspection scope that apply.
Offices: 772 Howard Avenue, Biloxi, MS; 150 Government Street, Suite 950-1000, Mobile, AL; and 13 Palafox Place, Pensacola, FL. Hours are Monday–Friday, 9 a.m.–5 p.m.