Author: David Wallace LaistPublisher:
ISBN:
Category : Craney Island (Va.)
Languages : en
Pages : 170
Book Description
An Ecological Study of the Craney Island Disposal Area in Hampton Roads, Virginia
Author: David Wallace LaistPublisher:
ISBN:
Category : Craney Island (Va.)
Languages : en
Pages : 170
Book Description
Craney Island Disposal Area, Replacement Study, Hampton Roads
Author: Final Environmental Report
Author: United States. Army. Office of the Chief of EngineersPublisher:
ISBN:
Category : Dredging spoil
Languages : en
Pages :
Book Description
Craney Island Disposal Area, Replacement Study, Hampton Roads
Author: Norfolk Harbor and Channels, Deepening and Disposal
Author: Norfolk Disposal Site
Author: Craney Island Rehandling Basin Maintenance Dredging
Author: Craney Island Eastward Expansion, Norfolk Harbor and Channels, Hampton Roads
Author: Geotechnical Feasibility Study Replacement Or Extension of the Craney Island Disposal Area, Norfolk, Virginia
Author: S. J. SpigolonPublisher:
ISBN:
Category : Craney Island (Va.)
Languages : en
Pages : 41
Book Description
Several alternatives were investigated to replace or extend the 2,500-acre Craney Island Disposal Area for continued dredged material disposal for the Norfolk harbor and channels. The disposal area was completed in 1957 and has been used continuously since that time and the dikes have been raised several times to the present e1 +26 ft Mean Low Water (MLW). Because of new plans to deepen the existing channel and continued maintenance dredging, the estimated storage life has greatly reduced. Five alternate configurations of the extension of Craney Island to the west and/or north were investigated as to their estimated storage capacity, their effect on the hydrodynamics of the harbor and river system, and the stability and constructibility of the retaining dikes which is the subject of this report. It was determined that: 1) it is technically feasible to design and construct the required dikes to e1 +8 ft MLW by hydraulic placement of sand; and 2) these dikes could be protected from erosion by the placement of riprap on the inside and outside slopes. The most economically feasible alternatives for storage capacity were configurations 5 and 2 which had an estimated cost per cubic yard of storage of $0.58 and $0.70, respectively. Keywords: Dike stability.
Craney Island Disposal Area
Author: Michael R. PalermoPublisher:
ISBN:
Category : Dredging
Languages : en
Pages : 94
Book Description
The Craney Island disposal ara is a 2,500-acre confined dredged material disposal facility located near Norfolk, VA. In 1981, the Craney Island Management Plan (CIMP) was developed to extend the useful life of the site for disposal of maintenance material from the project area. The CIMP called for subdivision of the site into three subcontainments and use of alternating filling and dewatering cycles. Management of the site in general accordance with the CIMP was implemented in 1984. This report documents site operations and monitoring data for the Craney Island disposal area from Oct 1980 to Sept 1987. Field sampling operations, laboratory testing, and monitoring and survey data are described and interpreted. Based on the monitoring data collected to data and projections of future fill rates, the site will be filled to elevation +30 ft during FY 2000 if the present intensity of management is continued. If the site had not been subdivided and management for dewatering not initiated, the site would fill during FY 1997. Therefore, the CIMP as implemented to date will result in a gain in useful life of approximately 3 years or 2% of the remaining capacity. Differences are due to a combination of factors, including inaccuracies of models in projecting long-term fill rates, inefficiencies in implementing the CIMP, natural inefficiencies of desiccation processes, and the placement of significant volumes of new work material in the site.