5 rules for unincorporated Sarpy County, Nebraska.
Verified from official government sources
Nebraska requires an NDEE construction stormwater permit for any site disturbing one acre or more before ground breaks. Sarpy County, Bellevue, Papillion, and La Vista also run MS4 stormwater programs across the Papillion Creek watershed.
Nebraska ties erosion control to its construction stormwater permit. A site disturbing one acre or more must keep sediment on-site under a pollution prevention plan, with silt fence and stabilized entrances in place before soil is disturbed.
Nebraska is landlocked, so no coastal law applies. Building near the Platte River, Missouri River, or the Papillion Creek system instead triggers county floodplain permits and federal Army Corps wetland review.
Sarpy County Zoning Regulations, Section 29.5.2(I)
Filling of the flood fringe associated with new development within the Papillion Creek System shall be limited to 25% of the flood fringe in the floodplain development application project area, unless approved mitigation measures are implemented.
Sarpy County enforces FEMA floodplain standards through Section 29 of its zoning regulations. A floodplain development permit is required before building or filling in a mapped special flood hazard area, and lowest floors must sit one foot above base flood elevation.
Sarpy County Zoning Regulations, Section 29.9.2(A)
Require new construction or substantial improvements of residential structures to have the lowest floor, including basement, elevated to one foot above the base flood elevation, based on best available data.
Nebraska has no statewide grading permit. Earthwork disturbing one acre triggers a state stormwater permit, and unincorporated Sarpy County reviews grading and drainage through zoning and subdivision review. Runoff cannot be diverted onto neighbors.
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