Download or read book Dredging Operations Technical Support Program The Corps Environmental Effects of Dredging Programs written by Robert M. Engler and published by . This book was released on 1988 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a broad program-level overview and documentation of the 1986-87 activities of the Environmental Effects of Dredging Programs. The current thrusts of the programs are field assistance through the Dredging Operations Technical Support (DOTS) Program technical assistance aspects, research through the Wetlands Research Program and the Long-term Effects of Dredging Operations Program, and field verification/demonstration through the DOTS dredged material management aspects and the Field Verification Program. These programs comprise the majority of the studies involved in evaluating the environmental effects of dredging and dredged material disposal.
Download or read book Dredging Operations Technical Support Program Update of the Corps Environmental Effects of Dredging Programs FY 89 written by and published by . This book was released on 1990 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a broad program-level overview and documentation of the FY 89 activities of the Environmental Effects of Dredging Programs. The current thrusts of the programs are field assistance through the Dredging Operations Technical Support (DOTS) Program technical assistance aspects, research through the Wetlands Research Program and the Long-term Effects of Dredging Operations Program, and field verification/demonstration through the DOTS dredged material management aspects. These programs comprise the majority of the studies involved in evaluating the environmental effects of dredging and dredged material disposal. (JG).
Download or read book Dredging Operations Technical Support Program Considerations for Reducing the Cost of Testing Dredged Material written by Judith C. Pennington and published by . This book was released on 1990 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The high cost of chemical analyses and bioassays of dredged material makes it necessary for decision makers to limit testing to that which will sufficiently characterize the sediment to evaluate a selected disposal alternative. This report offers guidance for limiting the amount of testing necessary and considers other factors that could potentially reduce the cost of testing dredged material. The importance of an initial site evaluation to reduce the extent of dredged material testing is stressed. Unless a reason to believe that contamination exists can be established through examination of historical data and other site characteristics, no testing is warranted. The need for testing can sometimes be eliminated by examination of regulatory criteria for categorical exclusions, i.e., circumstances under which no testing is required. Additional cost savings can sometimes be generated during the scoping process by amelioration of the concerns of interested parties prior to preparation of an environmental impact statement. Tiered testing as presented in the Federal Standard is recommended as a cost-reduction approach to material evaluation. The principal advantage of tiered testing is that it can be stopped when sufficient information has been acquired to make a decision regarding the suitability of a given disposal alternative. Keywords: Bioassays, Compositing, Army Corps of Engineers. (kr).
Download or read book Dredging Operations Technical Support Program General Decisionmaking Framework for Management of Dredged Material Example Application to Commencement Bay Washington written by and published by . This book was released on 1991 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Navigable waterways of the United States have a vital role in the Nation's economic growth. The US Army Corps of Engineers is responsible for the dredging and disposal of large volumes of sediment each year. Dredging is a process by which sediments are removed from the bottom of streams, rivers, lakes, and coastal waters, transported via ship, barge, or pipeline, and discharged to land or water. The presence of contamination in some locations has generated concern that dredged material disposal may adversely affect water quality and aquatic organisms or terrestrial organisms. Since many of the waterways are located in industrial and urban areas, some sediments may be highly contaminated with hazardous materials. A general decisionmaking framework based on the results of technically sound tests protocols is described. The decision making framework includes consideration of sediment chemistry, physical chemistry of disposal site environments, and biological effects of sediment contaminants, as well as comparison of test results from sediments to be dredged with test results from reference sediments and with established criteria. The framework provides the basis for selection of the environmentally preferable disposal alternative and for identification of potentially appropriate control measures to minimize problems associated with the presence of contaminants.
Download or read book Dredging Operations Technical Support Program A Framework for Assessing the Need for Seasonal Restrictions on Dredging and Disposal Operations written by and published by . This book was released on 1991 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seasonal restrictions on dredging and/or disposal operations are based upon concerns about potential dredging- or disposal-induced negative impacts to biological resources. In many cases, however, information on the degree to which either naturally occurring or dredging-induced environmental alterations directly or indirectly affect organisms is poorly quantified, in which case restrictions are based upon a reason to believe notion. This report addresses the general acceptability of seasonal restrictions through a compilation of available information on physical-chemical environmental alterations associated with dredging and disposal operations, and critical information regarding the effects of these alterations on principal biological resources. Based on this information, a method for evaluating existing or proposed seasonal restrictions on dredging and/or disposal operations is presented. This framework reflects the present understanding of effects of dredging- or disposal-induced, as well as naturally occurring, environmental alterations upon biological resources. In many cases, the magnitude of dredging- or disposal-induced alterations falls well within the range of naturally occurring phenomena and imposes little or no additional stress upon resource populations. In some cases, however, the magnitude of alterations may exceed that which occurs naturally, whereby concerns about dredging- or disposal- induced alterations are justified and should be considered when planning a project.
Download or read book Dredging Operations Technical Support Program Engineering Design and Environmental Assessment of Dredged Material Overflow from Hydraulically Filled Hopper Barges in Mobile Bay Alabama written by and published by . This book was released on 1990 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Barge overflow was investigated as a cost-effective option for future dredging needs in Mobile Bay, Alabama. Tests of hopper barge loading characteristics with overflow operations were conducted in Mobile Bay. In theory, overflow would allow denser materials to settle within the barge while less dense materials were shunted overboard. Increased density of barge-held materials would then translate to cost savings via a reduced requirement for transport to a distant approved disposal site. Thus, one major objective of the study was an engineering evaluation of equipment performance during the tests. A second major objective was to obtain field data for an assessment of the environmental consequences of overflow. In support of both objectives, modeling studies were performed to simulate overflows that would be associated with routine dredging operations. Eight separate tests were conducted. Three tests occurred at a site in lower Mobile Bay, and five tests at an upper bay site. Three tests (one lower bay, two upper bay) involved dredging in maintenance materials, and five tests (two lower bay, three upper bay) involved new work or deepening materials.
Download or read book Dredging Operations Technical Support Program Guidance for Contracting Biological and Chemical Evaluations of Dredged Material written by and published by . This book was released on 1990 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contracting is a cost-effective method for increasing the capability of the Corps of Engineers to conduct dredged material evaluations. Test data generated by a contractor are used as an integral part of the decision-making process by the Corps and the US Environmental Protection Agency regarding the suitability of dredged material for disposal. Therefore, conscientious contract management is vital to ensure that the generated data are of the highest quality, are obtained in a competent fashion, and can be defended against legal- scientific challenge. This report provides a general outline of the various types of contractors, guidance on a variety of activities required for management of chemical and biological contracts, and quality assurance/quality control techniques specifically for dredged and fill material. This report will provide project managers with procedures that will produce data that are reliable and can be used as the basis for important regulatory decisions. Keywords: Biological testing, Dredged material, Chemical testing, Fill material, Contractor, Quality assurance.
Download or read book Dredging Operations Technical Support Program Management Strategy for Disposal of Dredged Material Contaminant Testing and Controls written by N. R Francingues (Jr) and published by . This book was released on 1985 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The diversity of disposal alternatives and techniques for management of contaminated dredged material requires the development of an overall long-term management strategy for disposal. The selection of an appropriate strategy is dependent on nature of the dredged material, nature and level of contamination, available dredging alternatives, project size, and site-specific physical and chemical conditions, all of which influence the potential for environmental impacts. Technical feasibility, economics, and other socioeconomic factors must also be considered in the decisionmaking process. The management strategy presented mainly considers the nature and degree of contamination, potential environmental impacts, and related technical factors. The technical strategy is based on findings of research conducted by the US Army Corps of Engineers, the US Environmental Protection Agency, and other over the past 10 years and experience gained while actively managing dredged material disposal. Approaches for evaluating potential for contaminant-related problems and the applicability of various disposal alternatives are discussed. Detailed procedures for conducting tests or for design and implementation of management strategies are not presented, but are the topics of other papers to follow. A technically feasible and environmentally sound strategy for the disposal of dredged material is presented, and it is recommended that this strategy be implemented for future dredged material disposal operations.
Download or read book Dredging Operations Technical Support Program User s Guide for Models of Dredged Material Disposal in Open Water written by Billy H. Johnson and published by . This book was released on 1990 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical models that account for the physical processes determining the short-term fate of dredged material disposed at open-water sites provide estimates of suspended sediment concentrations in the receiving water and the initial deposition pattern and thickness of material on the bottom. Two such models were developed under the US Army Corps of Engineers Dredged Material Research Program to handle both instantaneous dumps and continuous discharges. A third model using features of the two earlier models has been constructed to handle a semicontinuous disposal operation from a hopper dredge. These models are known as DIFID (Disposal From an Instantaneous Dump), DIFCD (Disposal From a Continuous Discharge), and DIFHD (Disposal From a Hopper Dredge). The use and limitations of each are presented along with theoretical discussions. Example applications are given in the appendices to illustrate the setup of input data and the display of output from the models. Keywords: Barge. (aw).
Download or read book Dredging Operations Technical Support Program Measurement of Hydrologic Parameters of Confined Dredged Material at Wilmington Harbor Delaware Containment Area written by James E. Pizzuto and published by . This book was released on 1990 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computer model, Primary Consolidation and Desiccation of Dredged Fill (PCDDF), has been developed to predict the settlement of dredged material placed in confined disposal sites. PCDDF, a model that calculates both consolidation settlement and desiccation settlement, uses a well established theory to predict consolidation and employs an empirical formulation to predict desiccation. At present, no field or laboratory procedures exist for determining values for the empirical desiccation parameters. This study established procedures for quantifying these parameters through a field evaluation program in the US Army Engineer District, Philadelphia. A water budget approach was used to calculate desiccation parameters for the dried crust of the desiccating dredged material at the Wilmington Harbor Containment Area near Wilmington, DE. The evaporation efficiency was found to be a constant value of 0.72, the drainage efficiency was 0.21, the saturation limit was 3.02, the desiccation limit was 2.69, the depth of second-stage drying was 0.20 m, and the percent saturation of the desiccated crust (including cracks) was 0.74. The long-term water budget for the desiccated crust for the entire duration of the study clearly indicates that second-stage drying was largely completed when the study began. The procedures utilized in the study at the Wilmington Harbor containment area can be employed at other dredged material disposal sites to determine quantitative values for the empirical desiccation parameters. (aw).
Download or read book Dredging Operations Technical Support Program Long Term Monitoring of Eleven Corps of Engineers Habitat Development Field Sites Built of Dredged Material 1974 1987 written by Mary C. Landin and published by . This book was released on 1989 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eleven habitat development field sites built by the US Army Corps of Engineers (CE) on dredged material were monitored from 1974-1987 in response to questions regarding their ecological contribution and longevity in comparison to natural habitats. Seven sites (Nott Island, Conn; Windmill Point, Va; Buttermilk Sound, Ga; Apalachicola Bay Fla; Bolivar Peninsula, Tex; Salt Pond no. 3 Calif; and Miller Sands Island, Ore) were built during the CE Dredged Material Research Program. Four sites (Gaillard Island, Ala; Lake of the Woods, Minn; Pointe Mouillee, Mich; and Southwest Pass, La) were added to the long-term monitoring effort. Each site differed according to the type of habitat developed, location, dredged material substrate, structural development, water and energy regime, land-use potential, regional habitat needs, salinity, or other features representative of those encountered most often by field personnel in CE District offices where dredging occurs. Nine are intertidal, 5 are in fresh water, 3 in brackish water, and 3 in salt water. Two are large-scale, ongoing confined disposal facilities (CDF).
Download or read book Dredging Operations Technical Support Program Guidelines for Physical and Biological Monitoring of Aquatic Dredged Material Disposal Sites written by and published by . This book was released on 1990 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is a preliminary set of guidelines for physical and biological monitoring of aquatic uncontaminated dredged material disposal sites. The need for guidelines on this subject was one of the items indentified at the August 1985 Long-Term Management Strategy Workshop sponsored by the Water Resources Support Center. The resulting guidelines are intended to serve as a working document that can be periodically improved as experience dictates. Emphasis is placed on the establishment of concise objectives and hypotheses, the use of multidisciplinary approaches to developing monitoring programs, and the provision of results that are relevant and useful to site managers. A tiered step-wise procedure to develop a monitoring program is presented, along with a summary of the basic tools and techniques for biological and physical analyses. More detailed information is available in Selected Tools and Techniques for Physical and Biological Monitoring of Aquatic Dredged Material Disposal Sites.
Download or read book Dredging Operations Technical Support Program Design and Management of Dredged Material Containment Areas to Improve Hydraulic Performance written by F. D Shields (Jr) and published by . This book was released on 1987 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study presents observed residence time distribution data from some 12 DMCAs. These data were collected by injecting Rhodamine WT dye at the inflow point and monitoring dye concentration in the outflow. The resultant time-concentration curve is identical to the residence time distribution during the dyed test. In addition, similar data for chlorine contact chambers, physical models, and waste stabilization ponds found in the literature are also examined. A composite data set from all different sources showed a strong relationship between the ratio of mean residence time to theoretical residence time (theoretical residence time is equal to the pond volume divided by the average flow rate) and the pond length-width ratio. Baffles or spur dikes can be used to increase the effective length-to-width ratio of a given DMCA, thereby increasing the mean residence time without increasing the overall size. The relationship between mean residence time and length-width ratio was incorporated into the DMCA design procedure, and a process for selecting DMCA size, shape, and spar dike layout to achieve minimum cost resulted. The utility of state-of-the-art mathematical hydrodynamic models for stimulating flow through DMCAs is examined in Appendix A. It was found that the mathematical models are capable of reproducing the observed residence time distributions fairly well if model coefficients are arbitrarily adjusted to achieve best fit. However, better field data will be required to develop reliable a priori modeling capability.
Download or read book Dredging Operations Technical Support Program written by J. Homziak and published by . This book was released on 1983 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 1308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dredging Operations Technical Support Program Evaluation of Clamshell Dredging and Barge Overflow Military Ocean Terminal Sunny Point North Carolina written by Michael R. Palermo and published by . This book was released on 1990 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1987 maintenance dredging for the Military Ocean Terminal, Sunny Point (MOTSU), project was performed by mechanical clamshell dredge, with material placed in barges and transported to an open-water ocean disposal site. This work was the first major use of mechanical clamshell equipment in North Carolina. Since resource agencies were concerned with operational procedures for clamshell dredges from the standpoint of potential resuspension of sediment during the dredging process and overflow of barges to increase load, a field study was conducted to give site-specific information on the MOTSU clamshell operation. Barge loading characteristics for both overflow and nonoverflow conditions and potential gain in load due to overflow were determined for three barge loads. The load gained during the period of overflow varied from 1.4-3.2%, with corresponding times of overflow from 9 to 28 min. The load gained by filling the disposal barge in one test from a level 1 ft below the coaming to the point of overflow was approximately 6.9%. This, added to the load gained during overflow, corresponded to a total increase in load of 10.1% for this test. The suspended solids concentration of the overflow increased with time of overflow. Plumes from the clamshell bucket spillage were observed to be patchy in nature, were advected downcurrent, and mixed with the ambient water downstream. At this site, suspended sediment levels observed during dredging and overflow probably did not produce any significant adverse environmental effect upon eggs, larvae, juveniles and adult forms of estuarine-dependent fish and shellfish species. (edc).
Download or read book Dredging Operations Technical Support Program Evaluation of Hopper Loading and Overflow for Saginaw River Michigan written by Michael R. Palermo and published by . This book was released on 1989 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The US Army Engineer District, Detroit, maintains a navigation channel in the Saginaw River near Saginaw, MI. The sediments in some reaches contain metals and polychlorinated biphenyls (PCHBs). A hopper dredge is normally used, and overflow of the hopper is sometimes practiced to increase the load of solids for transport to the disposal area. The Detroit District has initiated a policy of no overflow in reaches of the channel where sediment PCB concentrations exceed 10 mg/kg (dry weight). However, there is concern over the possible impact of overflow from hopper dredging operations when sediments are dredged from other reaches of the channel where sediment PCB concentrations are less than 10 mg/kg. This report describes an evaluation of hopper loading and overflow characteristics of the Saginaw River conducted during August and September 1987. The study was designed to evaluate the effectiveness of increasing the hopper load during overflow and to determine the physical and chemical characteristics of the overflow for the Saginaw project. Keywords: Contaminated sediments, Dredging equipment, Overflow, Polychlorinated biphenyls, Water quality. (sdw).
