The project proposes to redesign and expand the existing Kahle Basin to a larger wet basin and improve conveyance capacity along Kahle Drive.  The Project will increase the treatment capacity and effectiveness by installing a treatment suited to the site conditions. 
Specifically, the Project will replace the undersized 36” reinforced concrete pipe along Kahle Drive.  The Project would also install conveyance infrastructure along Laura Drive to capture Lakeside Inn and adjacent commercial property runoff.  By installing drop inlets and conveyance pipe along Laura Drive the Lakeside Inn area runoff could be treated by the proposed Kahle Drive stormdrain treatment system.   
The dry basin would be completely reconstructed into a multi-chambered wet basin.  The wet basin will include a forebay to collect sediment prior to discharging to the main basin.  Flows will outlet from the multi-chambered basin via either a standpipe or a riprap lined emergency spillway for high flow events.  A vegetated modular block maintenance access road will be constructed across one of the berms and will double as a path for public recreation.  A short boardwalk/pedestrian bridge will be constructed to direct foot traffic over the gap between the end of the berm and the meadow.  In addition, signage will be constructed to provide educational information on the purpose and benefits of the basin.  
The basin’s location in Rabe Meadow adjacent to recreational uses including, walking, running and biking along the adjacent Stateline to Stateline bikepath and Lam Watah trail affords opportunity to blend area-wide stormwater treatment system with educational and recreational public uses.  The stormwater treatment redesign will take into account the existing recreational uses of the meadow to be a community asset for the meadow visitors, by expanding recreational and educational opportunities. 

Goal and Objectives

The goal of this project is to improve treatment of stormwater runoff in Kahle Basin, expand existing recreational uses in Rabe Meadow and establish a stormwater association to manage the maintenance needs.
The objectives:
  1. Redesign and expand Kahle Basin from a dry basin to a wet basin.
  2. Replace the 36” culvert along Kahle Drive with a 48” pipe.
  3. Add drop inlets and conveyance infrastructure along Laura Drive.
  4. Expand and enhance the existing recreational uses of Rabe Meadow.
  5. Establish framework of stakeholders to manage maintenance of the wet basin.
The Kahle Water Quality Basin Implementation Project was completed in October 2018 by the General Contractor RaPiD Construction. The basin site is currently being monitored to achieve restoration and revegetation of the site. The Project’s funders included US Forest Service, Douglas County, Nevada Department of Transportation, and Nevada Division of State Lands. 
Pre-treatment sediment forebay followed by constructed basin

Links and Documents