Johnson County Indian Creek Watershed Study

Johnson County Indian Creek Watershed Study

Location: Johnson County, Kan.

Client: Johnson County Public Works & Infrastructure Department/Phelps Engineering Inc.

Completion Date: 2006

Burns & McDonnell provided services as a subconsultant to Phelps Engineering Inc. to complete the Indian Creek Watershed Study for Johnson County, Kan., and the City of Overland Park, Kan. The study encompassed approximately 64.2 square miles of urbanized watershed in the cities of Overland Park, Leawood, Prairie Village and Olathe.

Burns & McDonnell's portion of the work included detailed analysis of the north branch and upper middle Indian Creek watersheds, a total area of 15.4 square miles. Detailed hydraulic analyses were made using the HEC-RAS computer models. The results will be used for a FEMA map revision of the 100-year floodplain, the 500-year floodplain and the regulatory floodway.

The analysis was also used to identify conveyance deficiencies and problem areas within the watershed. A capital improvements plan (CIP) was developed, providing a preliminary design of improvements, associated opinion of cost and a prioritization of each project. The study also involved considerable public participation that included distribution of 2,300 stormwater questionnaires, public meetings and development of a project Web site.

The project involved extensive use of geographic information system (GIS) applications to inventory the stormwater conveyance systems, extract modeling information, and house and manage data. Work products for which Burns & McDonnell was responsible included development of system deliverables within an Arc/SQL Server GIS environment.

  • System inventory
  • Hydraulic modeling
  • Master plan/capital improvement plan (CIP) development
  • Cost development
  • Geographic information system (GIS) integration
  • Public participation