Calcasieu River Sediment Removal Study
Abstract
The periodic maintenance of 14 miles of the Calcasieu River by sediment removal is required to restore a navigable waterway. One alternative being considered for the Calcasieu River is hydraulic dredging, with temporary or permanent dredged material disposal in an upland confined disposal facility (CDF). Monitoring data collected during the 1988-1989 maintenance event indicated that the CDFs may not have been properly managed for maximum efficiency in settling, retention of suspended solids, and possible contaminants. Laboratory column settling tests and modified elutriate tests were performed on three Calcasieu River sediments. The settling behaviors were observed to be typical of other sediments if hydraulically dredged and placed in a CDF. The compression tests data were used to develop the initial storage requirements. The flocculent tests data indicated that the suspended solids will settle by gravity. Results of the modified elutriate tests, which predict both dissolved concentrations of contaminants and particle-associated contaminant under quiescent settling conditions, were below the Federal Water Quality Criteria.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1994
- Accession Number
- ADA285153
Entities
People
- Roy Wade