Frequent Flooding Requires Stormwater Infrastructure Improvements

Problem

The area surrounding the Catoosa County Sheriff’s Office had a history of frequent flooding. CTI was retained to identify measures to remediate the situation.

Solution

After obtaining topographic survey and GIS data, CTI created a hydrologic model simulating stormwater runoff in the area of concern. A hydraulic model was created to analyze the capacity of the existing stormwater infrastructure as well as the proposed improvements.

Project Elements

• Series of diversion ditches conveying the runoff away from the ridge (west of the site) and parking lots.
• Detention pond constructed at the southern end of the site to collect the diverted runoff
• Box culverts beneath the entrance to the parking lot to direct flow towards the pond
• V-notch weir to control runoff velocity and volume

CTI Services

• Survey of site topography and existing stormwater infrastructure
• Hydrologic modeling of project site and surrounding contributing drainage area using storm and sanitary analysis
• Hydraulic modeling of existing infrastructure and proposed improvements using AutoDesk Storm and Sanitary Analysis and the AutoCAD Civil3D Hydraflow Hydrographs extension
• Construction Administration