US Army Corps of Engineers, Kansas City District and the 88th Regional Support Command (RSC)
- Storm water runoff and ponding water issues are occurring in several locations on the Appleton USARC facility, which is owned by the 88th Regional Support Command (RSC)
- Project includes development of design drawings and specifications to correct storm water runoff and ponding water issues throughout the facility
- The final design will be suitable for incorporation into a construction bid package. The design work includes up to two site visits, review of regulatory requirements, a topographic survey of the facility, a limited hydrology drainage study and development of a hydraulic model to include analysis of existing drainage conditions and post-improvement drainage conditions, and a geotechnical investigation at the Privately Owned Vehicle (POV) lot and the Military Equipment Parking (MEP) lot
Avatar and Team Subcontractor Burns and McDonnell are providing design services at the Appleton ARC in Appleton, WI. The facility experiences stormwater runoff and ponding issues at multiple locations on the site. The pavement has also experienced significant deterioration since its placement. The project consists of the following:
- Conduct Site Visit
- Complete Regulatory Assessment
- Conduct Hydrologic Study and Hydraulic Modeling
- Complete Geotechnical Investigation
- Prepare Design Drawings and Specifications
The Regulatory Assessment for the project evaluated the City of Appleton, Wisconsin Code and the Wisconsin Department of Natural Resources (WDNR) Code. Because the site is owned by the United States Government, it is not subject to the codes of the City of Appleton. The site is subject to the codes of the State of Wisconsin. The proposed construction activities will disturb more than one acre of land resulting in the need to file a Notice of Intent (NOI) to be prepared and filed with the WDNR.
Hydrologic modeling of the site was completed using Bentley CivilStorm V8i software which uses the methodology of Technical Release 55 (TR-55) “Urban Hydrology for Small Watersheds” from the National Resources Conservation Services (NRCS), formerly the Soil Conservation Service (SCS). The rainfall distribution for Appleton, Wisconsin is a Type II distribution. The project design flow is based on the 5-year and 100-year events in order to provide positive drainage which is dependent on the City storm sewer system downstream of the facility. A site topographic survey was performed to provide accurate elevations to the hydrologic modeling and design calculations and drawings. The geotechnical investigation was performed and encountered very slow draining and frost susceptible soils. Given the slow draining soils on site it was recommended that full depth pavement replacement either with asphalt and a drainage layer, or replacement with concrete be incorporated into the design.
A Technical Memorandum was prepared that provided the results of the regulatory assessment, topographic survey, geotechnical investigation, hydrologic modeling and presented options for correcting the storm water ponding issues along with ball-park cost estimates. A condition of the WNDR permitting is that the site incorporate controls to reduce total suspended solids (TSS) by 40% as compared to no control. The design options also incorporated ancillary site improvements requested by the facility. Once an option is selected by USACE and the 88th RSC the design plans and specifications will be prepared.