1-616-510-1046 Dennis J. Gebben is a seasoned environmental consultant with 30 years of experience. A geologist by trade, Mr. Gebben began his career in 1972 with Williams & Works of Grand Rapids, MI, a public works civil engineering firm. In the 1970’s, when new environmental laws and regulations were being promulgated, Mr. Gebben was quickly elevated to…
Sanitary Main River Crossing
As part of its infrastructure upgrade, the City of Williamston needed a 24” sanitary main extended from north to south across the Red Cedar River to its waste water treatment facility and the construction of a deep well adjacent to
the existing facility. Designed by C2AE (Lansing, MI), this extension required pipe and well activities to be completed ‘in the dry’ using cofferdam workspace isolation coupled with combined well point and trash pump dewatering. One of the challenges facing this project involved treating turbid water from within the cofferdams during soil excavation, well-point installation/develop procedures and trash pump operation. With confined working space available, standard stormwater basins could not be constructed. In addition, local regulations limited the turbidity level of treated stormwater discharges to the river to 100 NTU. Given the clayey subgrade soil conditions, limited space and strict discharge requirements, C2AE contacted InterfaceH2O™ for information regarding its water clarification system, WaterMatrix™.