LOWER GENESEE RIVER
ENTACT dredged 32,000 cubic yards of metals-impacted sediment from four areas of the Lower Genesee River, including two cattail wetland marshes. The project required precise mechanical dredging, turbidity controls, dewatering and solidification, and restoration within a constrained footprint at an active wastewater treatment facility. This project was also recognized by the EPA with a National Notable Achievement Award. By project completion, ENTACT had: Mechanically dredged 32,000 cubic yards of soft silty sand and clay Managed variable river currents and maintained
PICKLE POND REMEDIATION AND HABITAT CONSTRUCTION
ENTACT performed remedial activities at Pickle Pond, a nine-acre urban pond situated in the St. Louis River lower estuary. This project aimed to enhance the habitat for local wildlife, including waterfowl, beavers, and otters, while addressing sediment contamination. During this project, our team: Dredged more than 16,000 cubic yards of contaminated sediments composed of fine-grained silty clays Solidified dredged materials by applying a non-toxic super absorbent polymer to reduce excess water, allowing for direct loading into trucks for offsite disposal
FISHING CREEK SOUTH JETTY REHAB AND MAINTENANCE DREDGING
ENTACT performed both dredging and stone jetty improvements for the U.S. Army Corps of Engineers. All work was conducted in a shallow tidal environment, ensuring compliance with environmental standards. Throughout this project, our team: Dredged more than 30,000 cubic yards of sediment from inner and outer harbors and conveyed it to a confined disposal facility (CDF) Graded and replaced weir box outlet control structures within the CDF Repaired jetty rock revetments along 925 feet of breakwater, utilizing more than 6,000
LAKE RESERVOIR DREDGING
ENTACT performed emergency mechanical dredging of more than 120,000 cubic yards of contaminated sediments from a remote reservoir within an active mining operation. The project was initiated in response to a critical lack of reservoir capacity that threatened ongoing mining activities and water management operations. ENTACT’s team rapidly mobilized under Mine Safety and Health Administration (MSHA) requirements and completed all dredging and material management activities in less than 100 days. Despite the challenging mountainous terrain, steep reservoir grades, and unpredictable
MANISTEE RIVER MGP REMEDIATION
ENTACT executed an MGP remediation project on the Manistee River. The project included the dredging of 30,000 cubic yards of manufactured gas plant (MPG)-impacted sediment from a half mile stretch of the river. The sediments were solidified with Portland cement in lined dewatering pits prior to disposal at the landfill. This project was successfully completed while navigating the complexities of a busy waterway, ensuring environmental compliance and operational efficiency. On this project, our team: Dredged 30,000 cubic yards of MGP-impacted
RIVER DREDGING PROJECT
ENTACT dredged petroleum-impacted sediments from a major river system following a spill event. The project included the construction of temporary facilities, an access haul road connecting the staging area to the United States Army Corps of Engineers (USACE) causeway and capping an upstream outfall. This comprehensive approach ensured the effective removal of contaminated sediments while restoring the river environment. Upon project completion, ENTACT had: Dredged 1,300 cubic yards of impacted sediment Dewatered and conditioned sediment with Portland cement Transported and
MANISTIQUE RIVER AREA OF CONCERN – OU2 ZONES 5 AND 6
The Michigan Department of Environment, Great Lakes, and Energy contracted with ENTACT to provide dredging and remedial capping services in the Manistique River. This project focused on addressing polychlorinated biphenyl (PCB) contamination in river sediments. This comprehensive remediation effort effectively addressed PCB contamination, ensuring the protection of the river ecosystem and compliance with regulatory requirements. On this project, ENTACT: Dredged 42,000 cubic yards of PCB-impacted sediment, including 1,100 cubic yards classified as Toxic Substances Control Act (TSCA) hazardous material Installed
FORMER LASALLE MGP SITE SEDIMENT REMEDIATION
ENTACT conducted the dredging of more than 75,000 cubic yards of manufactured gas plant (MGP) impacted sediments from the Illinois River. This complex project involved extensive coordination among four major contractors working on various scopes of work simultaneously. This project not only addressed sediment contamination but also showcased innovative techniques in marine operations and remediation practices. Our team: Dredged more than 75,000 cubic yards of MGP-impacted sediments Provided marine support for the in-situ solidification and stabilization (ISS) operation, the first