The Boy Scouts of America (BSA) developed the Summit Bechtel Family National Scouting Reserve to be a multi-purpose, year-round destination for scouting activities and to serve as the permanent home of BSA’s signature event - the National Scouting Jamboree. Freese and Nichols has designed four earthen embankment dams ranging from 35 to 75 feet in height and from 400 to 850 feet in length. The dams form four lakes for various recreation activities, including fishing, kayaking/canoeing, swimming, and scuba diving. Our team's services included a reservoir siting analysis, water availability modeling, hydrologic and hydraulic modeling including breach analyses and emergency action plans, hydraulic design of the spillways, structural design of all structures, geotechnical analysis and design, cost estimating, construction phase services, state dam safety regulatory permitting, design of stormwater pollution prevent plans (SWPPPs), and water quality modeling of the proposed lakes. Freese and Nichols worked with S&ME to provide the foundation and borrow field exploration and laboratory testing for all four dams.
An innovative spillway design included the use of new drop inlet structures at each of the dams that allowed for the incorporation of the required low level outlet works and the overflow spillway into a single structure with no bridge needed to the top of the inlet. The structure limited discharges to a size sufficient for a small impact basin to dissipate the energy of the discharges, providing major cost savings over standard basin design.