How big can a dam be before NC Dam Safety applies?

Under G.S. 143-215.25A, a dam is generally exempt if it is under 25 feet tall or impounds under 50 acre-feet. The exception is if the state determines its failure could result in loss of life or significant damage to property below it. A smaller dam can still be regulated in that case.

Can I dam a creek on my own land in North Carolina?

Owning the land does not settle it. Placing fill in a stream or wetland generally requires a federal Section 404 permit and a state 401 water quality certification, unless an exemption applies. Some farm ponds qualify for an exemption. Contact the U.S. Army Corps of Engineers, Wilmington District, or your Soil and Water Conservation District first.

Do I need a permit for a pond that is not on a stream?

A pond on dry upland, away from streams and wetlands, usually avoids the stream and wetland rules. Disturbing an acre or more can still require an erosion control plan and stormwater coverage, and your county may have its own requirements. Check locally.

Who is responsible for getting pond permits?

Ultimately, the landowner is responsible for what happens on the land, so it is smart to get answers in writing. We will tell you what we see at your site and who to talk to, but agency staff make the final call.

Do You Need a Permit to Build a Pond in North Carolina?

By J.S. Excavation & Land Management, Walnut Cove, NC. Last reviewed November 2026.

Sometimes. A small pond in an upland pasture may need very little. A pond on a stream or in a wetland may need quite a bit. Here are the main rules and who to ask about each one.

Please note: we are pond builders, not lawyers, and rules change. This is a starting point and is not legal advice. Confirm your project with the agencies listed here before you dig.

Dam Safety: The Height and Volume Limits

North Carolina's Dam Safety Law is run by the Department of Environmental Quality. Under G.S. 143-215.25A, the law generally does not apply to a dam that is less than 25 feet tall or has an impoundment capacity of less than 50 acre-feet. Older sources often quote 15 feet and 10 acre-feet. Those limits were raised, so be careful with outdated advice.

The important exception: if the state determines that failure of the dam could result in loss of human life or significant damage to property below it, the small-dam exemption does not apply. So size is not the only question. What sits downstream matters too. The statute also has a separate exemption for dams built to supply agricultural water, which requires a professional engineer or qualified conservation staff to design or approve the plans and supervise construction, plus registration with the state beforehand. It does not apply to high-hazard dams.

If you are unsure, the DEQ Dam Safety Program can review a proposed dam. Its application guide says a proposed dam is first checked for jurisdiction, and one that is not regulated receives a Notice of Exemption.

Streams and Wetlands: Section 404 and 401

Placing fill in streams or wetlands generally requires a Section 404 permit from the U.S. Army Corps of Engineers, along with a 401 Water Quality Certification from the NC Division of Water Resources. A dam across a stream is fill. That surprises a lot of people who assume they can do what they want on their own land.

The farm pond exemption

Federal rules (33 CFR 323.4) exempt construction of farm and stock ponds in some cases, and the NC Department of Agriculture's soil and water staff have published guidance on these requests. The exemption is limited:

The pond has to serve a genuine farming use. A recreational pond is a different matter.
Ponds for aquaculture do not qualify for the agricultural exemption.
The exemption can be lost if the project changes the use of waters or reduces their reach, a limit known as "recapture."
Buffer rules can still apply to an exempt pond.

Do not assume your project qualifies. Ask first. The safest and often simplest answer is to build off-stream, if the site allows it, on land that is neither a stream nor a wetland. Whether something counts as a regulated stream or wetland is a call for the agencies. It may not be obvious from looking at it.

Erosion Control: The One-Acre Line

In North Carolina, land disturbance of an acre or more generally requires an approved Erosion and Sediment Control Plan along with construction stormwater coverage. Local programs can be stricter. In Forsyth County, for example, a City of Winston-Salem/Forsyth County form sets the line at 20,000 square feet for single-family dwelling construction and 10,000 square feet for other purposes. A pond with its dam, spoil and access can reach these limits faster than you might think.

The state's agricultural guidance says an agricultural pond can be exempt from submitting this plan. Even when no plan is required, keeping your mud on your property is still your responsibility. Red clay in a neighbor's creek is the sort of thing that gets a phone call.

Local Rules and Buffers

Counties and towns can add zoning, watershed and buffer rules, and some river basins have riparian buffer requirements of their own. Trout waters, mostly in the mountains, carry additional rules. Your county planning office can tell you what applies at your address.

Who to Call

County Soil and Water Conservation District: a good first call, especially for a farm pond or cost-share questions.
NC DEQ Dam Safety Program: whether your dam is regulated.
U.S. Army Corps of Engineers, Wilmington District: streams, wetlands and Section 404.
NC DEQ Division of Water Resources: 401 certification and buffers.
NC DEQ regional office or your local erosion control program: sediment and erosion control plans.
County planning and zoning: local requirements.

On a site visit, we will point out anything that seems likely to raise questions. If a project needs an engineer, we can build to the engineered plan. Your first step might be to read how to tell if your land will hold a pond, then talk to us about pond construction.