Tanglwood Lake Maintenance Dredging

Tanglwood Lake, located in Pike County, PA, is an impoundment created by Tanglwood Lake Dam, which is owned and maintained by the Tanglwood Lakes Community Association, Inc. (TLCA). Classified as a High-Quality, Cold-Water Fishery (HQ-CWF) for water quality protection, it accepts flow from Lake Wallenpaupack via Kleinhans Creek. The drainage area to the lake is approximately 0.6 square miles (384 Acres). The lake itself is approximately 26.0 acres.

Princeton Hydro has been contracted to conduct lake management services for TLCA since 2016 and was contracted to perform consulting and engineering services for design, permitting, bidding, construction administration, and construction oversight for the partial sediment removal from Tanglwood Lake through hydraulic dredging and onsite disposal. Princeton Hydro conducted a bathymetric survey and performed sediment sampling to determine the volume and consistency of the sediment as well as the feasibility of onsite dewatering. Building on this previous work, wetland delineation and a site survey were conducted to collect data to inform the engineering design, regulatory compliance, contractor solicitation, and construction. Princeton Hydro’s regulatory experts prepared all applicable state and federal permits, including PADEP Dam Safety; Soil Erosion and Sediment Control Plan Certification; and NPDES Stormwater Permit for the sediment removal; dewatering; and disposal on the adjacent lot.

The engineering design for sediment removal and dewatering was completed, along with the engineering design for the disposal area of the dewatered dredged material. The dredging occurred over multiple events, with approximately 2,000 cubic yards of sediment and organics removed from the eastern portion of the lake. This sediment was dewatered using geotubes placed on a gravel bed. Once dewatered and all approvals were obtained, the sediment was relocated to the adjacent lot to create a gentle slope off the roadway and to make the site more park-like for the community.