Memphis and Shelby County construction projects that disturb 1 acre or more must prepare a SWPPP and file a Notice of Intent with the Tennessee Department of Environment and Conservation under Construction General Permit TNR100000. Most also need a separate local Erosion Control Plan reviewed against Stormwater Management Manual 3.0, effective February 1, 2025.
What Is a SWPPP and Why Does Memphis Require One?
A SWPPP, or Stormwater Pollution Prevention Plan, is the written site-specific document showing how a project will keep mud, sediment, and pollutants out of local streams and the storm sewer system. Tennessee uses the term SWPPP, and TDEC requires one under Construction General Permit TNR100000.
The requirement comes from the federal Clean Water Act NPDES program, which Tennessee administers through the TDEC Division of Water Resources. Any project disturbing 1 acre or more needs a SWPPP in place before work begins.
Memphis and Shelby County add local review on top of the state permit. The City Land Development Office requires an Erosion Control Plan for developments over 1 acre and for projects requiring detention, reviewed against the Memphis and Shelby County Stormwater Management Manual and the TDEC erosion and sediment control handbook.
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What Is the Acreage Threshold for a Memphis SWPPP?
The trigger is 1 acre, or 43,560 square feet, of total land disturbance. Reach that number and TNR100000 coverage plus a site-specific SWPPP are required before clearing, grading, or excavation starts.
Sub-acre sites are still covered when they sit inside a larger common plan of development. A half-acre lot within a 10-acre subdivision is measured against the 10-acre total, so the SWPPP and NOI still apply to that lot.
Truly isolated grading under 1 acre is generally outside state permit coverage, but Memphis and Shelby County drainage, detention, and overlay-district rules can still apply. For the statewide picture, see our overview of Tennessee SWPPP requirements.
When Do You File the NOI With TDEC?
The Notice of Intent is the form requesting coverage under TNR100000. TDEC expects the site-specific SWPPP to be complete when the NOI is submitted, and coverage begins only after the state issues a tracking number and written authorization.
File before any land disturbance. Breaking ground ahead of coverage exposes the project to stop-work orders, penalties assessed per day of violation, and delays to local plan approval that are far more expensive than the lead time would have been.
Tennessee is also in a permit-cycle transition. The current Construction General Permit is set to expire September 30, 2026, with a reissued permit in drafting, so verify the operative permit version and any updated local manual before you submit.
Which Documents Does a Memphis Project Actually Need?
Three separate submittals cover most Memphis projects, and mixing them up is the most common cause of plan-review delay. The table below shows what each one is and who reviews it.
| Document | Reviewer | Trigger | When It Is Due |
|---|---|---|---|
| SWPPP | TDEC Division of Water Resources | 1 acre (43,560 sq ft) or more | Complete before the NOI is filed |
| Notice of Intent (NOI) | TDEC, permit TNR100000 | 1 acre or more, or larger common plan | Before any land disturbance |
| Erosion Control Plan | Memphis Land Development Office or Shelby County | Over 1 acre, or any project requiring detention | With local plan review, under SWMM 3.0 |
| Detention / post-construction plan | Memphis or Shelby County | Sensitive Drainage Basin or Fletcher Creek Overlay District | With local plan review, unless waived |
Whatever the local layer requires, the federal baseline is the same. The EPA Construction General Permit directs operators to design, install and maintain effective erosion controls and sediment controls to minimize the discharge of pollutants, and TDEC builds Tennessee permit conditions on that requirement.
What Must Be Inside the SWPPP Itself?
- Site description and maps: boundaries, existing features, soil types, drainage patterns, and receiving waters
- Construction activities: grading, excavation, paving, and material storage areas
- Erosion controls: mulch, seeding, mats, and temporary or permanent stabilization
- Sediment controls: silt fence, sediment basins, inlet protection, and check dams
- Pollution prevention: fuel and chemical storage, waste management, and vehicle tracking controls
- Inspection schedule: the frequency required by your permit coverage, in writing
- Corrective action procedures: how and when deficiencies are fixed and documented
How Often Must You Inspect a Memphis Construction Site?
Tennessee Construction General Permit guidance sets inspections at least once every 7 calendar days, plus an inspection within 24 hours of the end of a rainfall event of 0.5 inches or greater. Every inspection needs a written record.
Sites discharging to waters listed as impaired, or to designated Exceptional Tennessee Waters, carry a more frequent inspection schedule and additional buffer conditions. Confirm the exact frequency written into your TNR100000 coverage rather than assuming the standard cycle applies.
Memphis also ties fee credits to verified maintenance. The city nonresidential fee-credit materials require items such as a paved-area sweeping plan with sweeping at least twice per month plus documentation that it actually happened, so controls must be measurable and auditable rather than simply written into a plan.
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Which Local Triggers Apply Beyond the 1-Acre Rule?
Memphis and Shelby County tie requirements to disturbance area, drainage context, and project type together. A project under 1 acre can still land in full local review based on where it sits.
Projects over 1 acre, projects inside a Sensitive Drainage Basin, and projects inside the Fletcher Creek Overlay District generally require detention unless a waiver is approved. Those designations apply regardless of how small the disturbed footprint is.
Post-construction obligations run past closeout. Tennessee rules require permanent stormwater management programs to reduce pollutants to the maximum extent practicable, and the Third Edition SWMM applies within City and County boundaries, including systems in rights-of-way, drainage easements, and privately maintained detention, retention, and water-quality facilities.
What Mistakes Do Memphis Contractors Make Most Often?
The first is treating a SWPPP and an Erosion Control Plan as the same document. The SWPPP supports NPDES coverage under TNR100000; the Erosion Control Plan is a local submittal to Memphis or Shelby County. Many projects need both, and submitting one for the other costs weeks.
The second is assuming local rules scale only with acreage. Drainage context and overlay districts pull small projects into detention and water-quality review on a regular basis.
The third is underestimating recordkeeping. Inspection logs, maintenance records, and corrective-action notes must stay current for the life of the permit, and a single missing inspection report is enough to support a violation notice.
The fourth is letting the SWPPP go stale. Tennessee permit language requires amendments when design or operation changes significantly affect pollutant discharge potential, so a regrade, a new staging area, or a drainage change all require an update and notice to the local reviewer.
Why Work With Pro SWPPP on a Memphis Project?
Pro SWPPP, LLC is a stormwater documentation and permitting firm, not a field contractor. Plans are prepared by a Certified Professional in Erosion and Sediment Control and delivered in 72 hours, sequenced around your construction phasing so controls are specified in the right order: erosion control first, then sediment control, with rapid stabilization called out for slopes, channels, and areas draining to receiving waters.
The deliverable set includes the site-specific SWPPP and site maps, NOI support, inspection forms, corrective-action tracking templates, weather logs, and BMP modification records. Physical installation of BMPs is handled by your site contractor; we own the paperwork, the permitting, and the inspection documentation behind it.
Our team works the Memphis and Shelby County Stormwater Management Manual 3.0, the Tennessee Construction General Permit, and the TDEC erosion and sediment control handbook, and supports contractors in Texas, Georgia, Tennessee, and nationwide. Learn more on our about page or reach out through our contact page.
Memphis SWPPP FAQ
Do I need a SWPPP if I am disturbing less than 1 acre in Memphis?
If the work is part of a larger common plan of development totaling 1 acre or more, yes, a SWPPP and NOI are required under TNR100000. If the disturbance is genuinely isolated and under 1 acre, state coverage may not apply, but local erosion control and detention rules still need to be checked.
What is the difference between a SWPPP and an Erosion Control Plan in Shelby County?
The SWPPP is the site-specific plan supporting your NOI for NPDES coverage from TDEC. The Erosion Control Plan is the local submittal reviewed by Memphis or Shelby County Land Development under Stormwater Management Manual 3.0. Many projects over 1 acre require both documents.
When do I submit my NOI and SWPPP?
Both must be handled before any land disturbance begins. The SWPPP should be complete when the NOI is filed, and construction waits for TDEC to issue a tracking number and written authorization. Starting early risks stop-work orders, penalties per day of violation, and local permit delays.
How often do I need to inspect my Memphis site?
Tennessee permit guidance sets inspections at least once every 7 calendar days plus within 24 hours of the end of a rainfall event of 0.5 inches or greater. Sites discharging to impaired or Exceptional Tennessee Waters inspect more frequently, so confirm the schedule written into your permit coverage.
Who installs the BMPs shown in my SWPPP?
Your site contractor does. Pro SWPPP prepares the plan, specifies and locates each control, and supplies inspection forms and corrective-action templates. Physical installation of BMPs, grading, and all field construction remain the responsibility of the contractor holding the local permit.
Can I use the same SWPPP across multiple construction phases?
Yes, provided it is amended as the site changes. Tennessee permit language requires amendments when design or operation changes significantly affect pollutant discharge potential, which covers regrading, new staging areas, and altered drainage patterns. Keep the amended version on site with the inspection log.
What is the Fletcher Creek Overlay District?
It is a sensitive drainage area in Memphis where additional stormwater controls and detention are generally required. Projects inside the overlay face stricter plan review, and any deviation from the detention standard needs an approved waiver, which is best identified during design rather than at submittal.
Do the Memphis stormwater rules apply to Shelby County projects too?
Yes. Stormwater Management Manual 3.0, effective February 1, 2025, applies within both City and County boundaries, and both jurisdictions review projects under that same manual. Specific fees, submittal packages, and review timelines can still differ between the two offices.
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