Location
Crawford County, Indiana

Client Reference
Indiana Department of Natural Resources

Time Period
2002

Project Description

The Wyandotte Lake Dam is a state-owned facility located in the Harrison-Crawford State Forest in Crawford County, Indiana. The dam is 20 feet high and experienced an uncontrolled breach in the mid-1990’s as a result of spillway failure.  CBBEL was hired to prepare plans and permit applications to fill the breach area and to design a new spillway system.  This project also included a detailed dam inspection and the design of upgrades to the earthen embankment.
 

Scope of Engineering & Professional Services

Engineering services included a detailed hydrologic analysis of storm water flows; hydraulic analyses of a new concrete spillway, an energy dissipation structure, and the downstream channel; and preparation of detailed construction drawings and specifications.  Design elements included a regraded embankment, a new spillway, and a new outfall channel. The detailed construction plans included excavation and grading plans, quantity take-offs, dewatering plans, spillway plans, revegetation plans, construction cost estimates, and erosion and sediment control plans.  CBBEL staff also coordinated surveying and geotechnical subcontractors to obtain the necessary design data.  CBBEL staff developed alternate approaches to determine the most effective option.