Missouri pond permit guide
Pillar guide
In Missouri, a non-federal pond dam under 35 feet in height generally does not require a state dam safety permit, while dams 35 feet or higher do. A separate federal Section 404 permit may apply if the pond affects a stream or wetland, although many farm and stock ponds are exempt under Section 404(f). This guide explains both, with the state and federal sources.
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 your licensed local contractor.
The two questions that decide everything
Whether you need a permit comes down to two separate questions:
- State dam safety: How tall is the dam? Missouri regulates dams by height.
- 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 35 feet: not permitted by the state dam safety program.
- 35 feet and higher: a construction permit is required to build the dam and a safety permit to operate it. The permit application must bear the seal and signature of a professional engineer registered in Missouri (section 236.435 RSMo).
- Agricultural dams, at any height: a landowner who owns or proposes to construct a dam or reservoir used primarily for agricultural purposes is exempt from all of sections 236.400 to 236.500 (section 236.435.6 RSMo). “Agricultural dam” is defined in the law as one built to impound water for irrigation, livestock watering, or commercial fish rearing and sale (section 236.400 RSMo). DNR asks owners to talk to the Dam and Reservoir Safety Program before applying for that exemption.
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. Your contractor 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 and Missouri state programs may be available for qualifying agricultural ponds. Our Missouri pond cost share guide explains who qualifies and how to apply.
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, one licensed local contractor who builds to these standards will help you confirm what applies before the first cut.
Frequently asked questions
Do I need a permit to build a pond in Missouri?
For most private farm ponds, not from the state dam safety program, because the dam is under 35 feet in height. A federal Section 404 permit can still apply if the pond affects a stream or wetland, though many farm and stock ponds are exempt under Section 404(f). The answer depends on the dam height and whether the project touches a water of the United States.
What is the Missouri 35 foot dam rule?
Under Missouri's Dam and Reservoir Safety Law, a dam 35 feet or more in height needs a construction permit to build it and a safety permit to operate it, and the permit application has to carry the seal and signature of a professional engineer registered in Missouri. Dams under 35 feet are not permitted by the state dam safety program. Separately, a dam or reservoir used primarily for agricultural purposes is exempt from all of these provisions at any height, under section 236.435 RSMo.
What is the Section 404(f) farm pond exemption?
Clean Water Act Section 404(f)(1) generally exempts the construction and maintenance of farm and stock ponds from federal permitting, so many true farm ponds do not need a Section 404 permit. Recreational ponds or lakes that dam or fill a stream are often not exempt and may require Corps review.
Who do I ask about my specific pond?
For state dam questions, the Missouri DNR Dam and Reservoir Safety Program. For federal Section 404 questions, the US Army Corps of Engineers district that covers your basin. For design and cost share, your local NRCS and Soil and Water Conservation District office. A licensed local contractor can also help you confirm what applies before you build.
Keep going
Planning a pond, lake, or dam project?
Tell us what you have in mind. One local contractor scopes and quotes it. Free for landowners.
Your request goes straight to one independent local pond and excavation contractor serving southwest Missouri, usually within about an hour during the day, not a national lead list.
Updated