Missouri pond permit guide

This is the pillar guide for permitting a pond in southwest Missouri. It is written to be useful and accurate, with links to the original state and federal sources. It is general information, not legal advice. Confirm the specifics for your site with the agencies below or with the licensed local contractor you are matched with.

The two questions that decide everything

Whether you need a permit comes down to two separate questions:

1. State dam safety: How tall is the dam? Missouri regulates dams by height.
2. Federal Section 404: Does the project put dredged or fill material into a stream, wetland, or other water of the United States?

A pond can clear one and still be subject to the other, so it helps to take them one at a time.

State: the Missouri 35 foot dam rule

Missouri regulates non-federal, non-agricultural dams through the Dam and Reservoir Safety Law (Chapter 236 RSMo) and 10 CSR 22, administered by the Missouri Department of Natural Resources. The thresholds are based on dam height:

• Under 25 feet: not regulated by the state dam safety program.
• 25 to 35 feet: inventoried but not permitted.
• 35 feet and higher: a construction permit is required, prepared by a Missouri registered professional engineer, plus a safety permit to operate.

Most private farm ponds fall below 35 feet, so they typically do not require a state dam safety permit. That is a meaningful reassurance for a landowner planning a normal farm or fishing pond. The source is the Missouri DNR Dam and Reservoir Safety Program, and permit detail is on the DNR dam and reservoir safety permits page.

Note that height is measured to the design of the dam, not simply the depth of the water, so a tall embankment in a draw can approach the threshold even on a modest pond. The contractor you are matched with can tell you where your design sits.

Federal: Clean Water Act Section 404

Separate from the state height rule, a federal permit from the US Army Corps of Engineers may be required to discharge dredged or fill material into waters of the United States. There is no acreage trigger. The trigger is impact to a stream, wetland, or other water of the US.

• The 404(f)(1) exemption generally covers construction and maintenance of farm and stock ponds, so many true farm ponds are exempt.
• Recreational ponds or lakes that dam or fill a stream are often not exempt and require an avoid, minimize, and mitigate review.

The authoritative reference is the US EPA permit program under CWA Section 404. Also be aware of Section 401 water quality certification and any state land disturbance or stormwater permits where applicable; Missouri DNR maintains a citizens guide to water permits.

Which Corps district reviews your project depends on the basin your land drains to. In this region, White River basin sites tend toward the Little Rock District, while Osage and Missouri River tributary sites tend toward the Kansas City District. Confirm the district for your specific site.

Design standards: NRCS Practice Standard 378

Even where no permit is required, building to a recognized design standard protects your investment. The USDA NRCS Conservation Practice Standard 378 (Pond) applies where the effective dam height is 35 feet or less and the product of storage times effective height is under 3,000. It sets requirements for the dam, spillway, seepage control, freeboard, and a settlement allowance. Cost share through NRCS programs may be available for qualifying agricultural ponds, which is worth asking your local Soil and Water Conservation District about.

A simple way to think about it

• Planning a normal farm or stock pond with a dam under 35 feet that does not block a stream? You are likely outside both the state permit and, under 404(f), federal permitting. Build it well anyway.
• Planning a recreational lake that dams a creek? Expect the federal Section 404 question to be real, and plan early.
• Planning a tall dam at or above 35 feet? A Missouri registered professional engineer and a state construction permit are part of the project.

Who to contact

• State dam safety: Missouri DNR Dam and Reservoir Safety Program.
• Federal Section 404: the US Army Corps of Engineers district for your basin.
• Design and cost share: your local NRCS office and county Soil and Water Conservation District.

When you are ready, we connect you with one licensed local contractor who builds to these standards and can help you confirm what applies before the first cut.