5.8.5 Turbid/Lunsten Lake Corridor Restoration

ProjectTurbid/Lunsten Lake Corridor Restoration
DescriptionRestoration of wetlands around, and along the tributary between, Turbid and Lunsten Lakes
Need

A TMDL study including a phosphorus reduction plan is currently beingdeveloped for Parley Lake. Proposed reductions include control of external sources of phosphorus through various efforts in the watershed and internal load management. The TMDL identified a need to reduce external loading by 393 pounds annually

The TMDL for Parley Lake, which is in progress at the time of this writing, identified wetland restoration in the corridor between Turbid andLunsten Lakes upstream of Parley Lake as a potential means to reduce phosphorus load to Parley Lake.

The TMDL is not yet final as of this writing and details of the specific improvements have not been developed. However, a small stream thatconnects Turbid and Lunsten Lakes has been partially ditched, and restoration of the hydrologically altered wetland complex through which it flows could provide for treatment of agricultural runoff. There is a potential to restore approximately 55 acres of riparian wetland. The wetland currently exhibits moderate wildlife habitat and low vegetativediversity. There are two distinct wetland areas for potential restoration:approximately 40 acres of ditched, tiled and farmed wetland on the northwest side of Turbid Lake (“Phase I”), and approximately 15 acres riparian to the stream downstream of Laketown Road (“Phase II”). These wetlands are located within the Key Conservation Areas identified for this subwatershed.

OutcomeReduction in phosphorus load from external sources estimated at 146 pounds annually; improved water clarity in Lunsten and Parley Lakes; more diverse wetland vegetation community; restoration and enhancement of a wildlife corridor between lakes.
Estimated Cost and Funding
Phase I: Wetland restoration on thenorthwest side of
Turbid Lake. Source offunding is the District capital levy.

 



 

Phase II: Wetland restoration adjacent tochannel just
south of Laketown Road.Source of funding is the District
capital levy.
$ 675,000 Design, easmnt
$1,394,414 Construction
$2,069,914 Total

$54,100 Design, easmnt
$442,200 Construction
$496,300 Total
Schedule

Phase I: 2011 Design, acquire easements 2011 Construct

Phase II: 2012 Design, acquire easements 2011 Construct