North Michigan Creek Reservoir and its surrounding facilities are among the main recreational attractions at State Forest State Park. The reservoir was formed in the mid-1960s with construction of a 65-ft-high earthen dam, which has experienced uncontrolled seepage at its right abutment for nearly 50 years. Despite multiple attempts to mitigate the problem with shallow drain lines and other measures, safety required a full rehabilitation of the dam.

The strategy called for installing a granular drainage blanket collection system, removal and replacement of a 275-ft-long concrete service spillway, reconstruction and rehabilitation of the outlet works system and installation of dam safety instrumentation. More than two dozen design innovations—including different approaches for construction of seepage collection embankment zones and earthwork material management and utilization—helped reduce cost, optimize constructibility and increase the dam’s life cycle and performance.