Approximately 16,000 cubic yards of accumulated soft sediment, silt and natural clay were hydraulically dredged from the river and marina to increase the navigable depth by four feet. Geotextile tubes used to dewater the dredged sediment were staged in two municipal parking lots along the river. The active dredging phase of the project took place in … [Read more...]
Conner Creek CSO Dredging Project
IAI dredged 180,000 cubic yards of in-situ material from Conner Creek to create capacity for a new combined sewage overflow treatment facility. The project involved the removal of approximately 100,000 cubic yards of contaminated sediments utilizing an 8 inch diameter swinging ladder dredge and an 8 inch diameter auger dredge. A specially designed header … [Read more...]
Cold Weather Emergency Sand Pumping & Geotextile Tube Dewatering
IAI was contracted to remove and dewater silica sand waste from a frozen settling pond at a Woodbury, Minnesota mine, as an immediate means of restoring capacity to the pond. A 500 feet by 250 feet settling pond was filled with silica sand waste, a byproduct of the silica sand mining and washing process. The pond was filled with sand waste, … [Read more...]
Coal Ash (Fly Ash) Pond Dredging
IAI utilized an 8 inch diameter auger dredge to remove 25,000 cubic yards of coal ash (or fly ash) sludge from an industrial settling pond at a coal-fired electricity generation plant in Lumberton, North Carolina. The coal ash was dredged directly into geotextile tubes, which were deployed around the perimeter of the same pond. The filled geotextile tubes, … [Read more...]
Missouri River Sandbar Waterfowl Habitat Restoration
As part of an effort to restore emergent sandbar habitat in the Missouri River for two endangered species of bird (the least tern and the piping plover), the U.S. Army Corps of Engineers (USACE) let this project. IAI provided geotextile tube installation and filling services, deploying and filling approximately 1,028 lineal feet of 40 foot circumference … [Read more...]
Mount St. Helens Grade Building Structures
Summary IAI installed 2,300 lineal feet of scour apron and 2,300 lineal feet of 40 foot circumference geotextile tubes in the North Fork Toutle River as part of an effort to reduce flooding by trapping sand and sediments flowing from the Mount St. Helens volcano into the river. The tubes have been placed in the river, along with massive timber … [Read more...]
