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.

Links and Documents


NOTICE TO CONTRACTORS:  Sealed proposals will be received in the Office of the Nevada Tahoe Conservation District at 400 Dorla Court, PO Box 915, Zephyr Cove, Nevada 89448-0915, until 4:00 P.M. on April 18, 2018 for the “KAHLE WATER QUALITY BASIN IMPLEMENTATION PROJECT, STATELINE, DOUGLAS COUNTY, NEVADA”.  Such sealed proposals will be opened publicly at 4:05 P.M. the same day in the NTCD Conference Room, in the NTCD Office Building at 400 Dorla Court, Zephyr Cove, Nevada. The Nevada Tahoe Conservation District Board of Supervisors will consider award of the contract at a subsequently scheduled meeting. Project Contract Work under this contract includes but is not limited to, all material, labor, tools, expendable equipment, utility and transportation service, traffic control, signage, and all other incidental items necessary to perform and complete, in a workmanlike manner, the work described within and required for construction of stormwater treatment project improvements (refer to plans and Special Provisions prepared by NTCD) including, but not limited to: install stormwater conveyance pipe; install wet basin and associated inlets and outlets; install manholes, install concrete block sediment forebay; repair pavement and curb as necessary; revegetate the site; provide temporary erosion control; haul excess material to approved disposal site; repair all existing site improvements damaged during the course of the work and provide job cleanup to the satisfaction of NTCD. Work will be performed within Douglas County right-of-way and on a United States Forest Service parcel. Documents may be obtained at no cost at ntcd.org, at the Nevada Tahoe Conservation District at 400 Dorla Court, Zephyr Cove, Nevada 89448 or by contacting Meghan Kelly, mkelly@ntcd.org, or Monica Grammenos, mgrammenos@ntcd.org, (775) 586-1610.

Bid and Final Design Documents

Solicitation Documents for Kahle Basin

Final Design Plans for Kahle Basin

Final Design Report for Kahle Basin

Addendum 1

Addendum 2

Addendum 3

Final Design Plans for Kahle Basin with Addendums Integrated