Land records · Parcel maps · October 7, 2026
What Is a Drainage District? Assessments and Ditches
What is a drainage district? A local special district that builds and maintains ditches, tiles, and levees, funded by assessments on benefited land.
What is a drainage district? A drainage district is a local unit of government, often created under state law at the request of landowners, to build and maintain drainage systems such as open ditches, underground tile mains, pumps, and levees. Drainage districts are especially common in farm regions of the Midwest and South where draining wet soils made land farmable. The district is funded by assessments on land that benefits from the drainage, typically based on how much each parcel benefits. Assessments appear on property tax bills. This page is general land-records background, not legal advice.
How drainage districts work
| Feature | Description |
|---|---|
| Formation | Petition by landowners and court or county approval |
| Governance | Elected commissioners, trustees, or county board |
| Facilities | Ditches, tiles, pumps, levees |
| Funding | Assessments on benefited land |
| Rights of way | Access along ditches for maintenance |
Assessments
Each parcel’s share is usually based on a classification of benefits. Land that drains more water or benefits more pays more. Assessments may be annual for maintenance or one-time for improvements. See what is a special assessment.
Rights of way and easements
Districts often hold rights of way along ditches for access and spoil placement. These may be recorded or established by statute. Building near ditches may be restricted. See what is a drainage easement.
Finding if land is in a drainage district
Check the property tax bill for drainage district charges, county drainage records, and GIS layers. See how to read a property tax bill.
Drainage districts vs other districts
A drainage district is a type of special taxing district focused on water management. Levee districts and flood control districts are related.
Historical records
Many drainage districts date to the late 1800s and early 1900s. Records include engineering reports, maps, assessment rolls, and court files, which can help explain field tile layouts and ditch locations.
Effects on owners
Owners may have obligations not to obstruct district drains and may face assessments for repairs or upgrades. Subdivisions built on former farmland may still be in drainage districts.
Example
A farmer’s 160 acres lie within a county drainage district. The tax bill includes a drainage assessment for ditch maintenance. When the district votes to repair a tile main, the farmer receives a larger assessment based on the benefit classification of the land.
Hearings and objections
Major improvements usually require notice and hearings where landowners can object to costs or benefit classifications.
Field tile and private connections
Private field tiles often connect to district mains. Owners can usually maintain their private tile but may need permission before connecting new lines to district facilities or altering district ditches.
Questions for buyers
Ask the county drainage office whether any district repairs are planned and what recent assessments have been.
Bottom line
A drainage district builds and maintains ditches, tiles, and levees, funded by assessments on land that benefits. It is a special district with recorded or statutory rights of way. Check tax bills and county drainage records before buying rural or former farmland. Explore counties via the Platbookmapper map.
What is a drainage district FAQ
What is a drainage district?
A local district that builds and maintains drainage systems.
How are drainage assessments calculated?
Usually by benefit to each parcel.
Where do drainage assessments appear?
On property tax bills.
Can I build near a district ditch?
Often limited by rights of way.
Who runs drainage districts?
Elected commissioners or county boards.