Add to ORKGManteno Lake is located 8 miles northwest of Earling, IA in Shelby County. The lake has been impaired with an overload of silt and nutrients. In October of 2007, land directly north of the lake will be coming out of CRP and back into agricultural production. The Shelby Soil and Water Conservation District, Shelby County Board of Supervisors and Shelby County Conservation Board feel strongly that treatment of this area is necessary prior to the CRP contract expiring. The placement and construction of three structures will reduce the amount of silt and nutrients affecting Manteno Lake. This project calls for the construction of three structures on crucial tributaries to the lake