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Floodplain Information

Functions of the Floodplain


Floodplains are important ecological features which perform natural functions that are designed to keep floodwaters in check. Floodplains act as overflow basins for rivers and streams, so that when a large amount of rain falls at once, the rivers and streams have somewhere to distribute excess water. In addition to this, floodplains provide habitat for countless species of animals such as deer and foxes as well as fish and birds. This is why it is crucial that we limit development in floodplains as much as possible. In addition to damaging a threatened ecosystem, the more development in a floodplain, the worse flooding becomes. Any kind of development in a floodplain displaces potential floodwaters, which then creates a larger problem downstream or even just next door.  

The City of Chapman maintains approximately 72 acres of designated open space in the Special Flood Hazard Area (SFHA). This open space ranges from parks to former residential lots that have been converted to open space to school recreational areas such as soccer fields and baseball diamonds. These designated open areas help keep the floodplain in natural balance. The more open space within this sensitive environment, the less potentially damaging floods could become.


Contact Us

Bill Flanery
Floodplain Manager

446 N. Marshall St.
Chapman, KS  67431

Ph:  (785) 922-6582
Fx:  (785) 922-7000

National Flood Insurance Program


The City of Chapman participates in the National Flood Insurance Program (NFIP) and has adopted and administers floodplain development requirements within the 100 year floodplain.  The NFIP is administered by the Federal Emergency Management Agency (FEMA) and provides flood insurance at reasonable costs to homeowners and businesses in Chapman.  Most structures built or substantially improved within the 100-year floodplain are required to be floodproofed either by elevating the building or designing the building to resist  flood damage.  The ultimate goals of the program are:

  • to provide (in some cases required) flood insurance;
  • to avoid loss of property and life due to flooding;
  • to retain open spaces and cropland;
  • to mitigate the releasing of pollutants into watercourses; and
  • to allot the natural storm water detention function of the floodplain to be intact.
More Information on the NFIP – www.floodsmart.gov

Map Information Services


As a public service, the City of Chapman provides the following information upon request:

  • Whether a property is located in/out of the Special Flood Hazard Area (SFHA) as shown on the current FIRM for the City of Chapman.
  • Additional flood insurance data for a site, such as the FIRM zone and the base flood elevation (BFE) or depth, if shown on the FIRM.
  • Handouts on flood insurance purchase requirements that can assist residents who need a mortgage or loan for property in the SFHA.
  • Access to elevation certificates that have been processed in the City of Chapman.
  • Copies of Letters of Map Amendments (LOMA) or Letter or Map Revisions (LOMR) on file in the City of Chapman.

The City of Chapman office staff can assist with questions on floodway and floodplain issues.  There is no charge for this service.

Requirements, Applications, Codes and Resources


Structures within the 100-year floodplain must be flood-proofed to one foot above the Base Flood Elevation (BFE).  Our staff will determine if your property is in the floodplain and the BFE.  Most improvements within the floodplain require the homeowner to provide a certified elevation survey and a floodplain development permit.  Once construction is completed, a post-construction elevation survey is required to document that the improvements are properly flood proofed.  The following documents and resources provide greater detail on the program and the requirements.