• Corporate HQ, NY
  • Melville, NY
  • Iselin, NJ
  • Ossining, NY
  • Mount Laurel, NJ

Andy Daly Dam


Andy Daley Dam, originally known as Squaw Lake Dam, has been in existence for approximately 75 years. The dam was originally an earthen dam with a wooden sluice box. The property on which the dam was located became YMCA Camp Ockanickon about 100 years ago and Squaw Lake has historically been the major focal point of this section of the YMCA Cam. This facility generated income that directly supported the camp programs.

On July 12, 2004, 13.4 inches of rain fell over the region, causing flood flows that breached many dams including Andy Daley Dam.  HAKS designed a replacement that would be both functional and affordable. We initially prepared hydraulic and hydrology reports, as well as downstream studies of design storms and dam break analyses and submitted this information to the New Jersey Department Environmental Protection, which reviewed the data and subsequently classified Andy Daley Dam as a Class III Dam which required a 100-Year Flood Event design.

Our analyses indicated that design flow could not be handled through a culvert and the dam would be overtopped. This led us to design overtopping protection in the form of articulated concrete matting for the downstream face of the dam.  As part of the design for the dam, various environmental permitting was required, including the protection of the freshwater wetlands near the dam. HAKS applied for and received all necessary permits.

Construction of the dam was completed on an accelerated schedule to accommodate the needs of the YMCA Camp. HAKS also inspected the construction and was instrumental in keeping the project on target for both cost and schedule.