Download or read book Performance of Dredging by Contract written by United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Water Resources and published by . This book was released on 1977 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance of Dredging by Contract written by United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Water Resources and published by . This book was released on 1977 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of Dredge Monitoring Systems to Dredge Contract Administration Quality Assurance written by Stephen H. Scott and published by . This book was released on 2000 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Contract Dredging written by United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Water Resources and published by . This book was released on 1978 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dredging written by United States. Army. Corps of Engineers and published by . This book was released on 1947 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Board of Contract Appeals Decisions written by United States. Armed Services Board of Contract Appeals and published by . This book was released on 1968 with total page 1576 pages. Available in PDF, EPUB and Kindle. Book excerpt: The full texts of Armed Services and othr Boards of Contract Appeals decisions on contracts appeals.

Download or read book Sediment Dredging at Superfund Megasites written by National Research Council and published by National Academies Press. This book was released on 2007-10-30 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some of the nation's estuaries, lakes and other water bodies contain contaminated sediments that can adversely affect fish and wildlife and may then find their way into people's diets. Dredging is one of the few options available for attempting to clean up contaminated sediments, but it can uncover and re-suspend buried contaminants, creating additional exposures for wildlife and people. At the request of Congress, EPA asked the National Research Council (NRC) to evaluate dredging as a cleanup technique. The book finds that, based on a review of available evidence, dredging's ability to decrease environmental and health risks is still an open question. Analysis of pre-dredging and post-dredging at about 20 sites found a wide range of outcomes in terms of surface sediment concentrations of contaminants: some sites showed increases, some no change, and some decreases in concentrations. Evaluating the potential long-term benefits of dredging will require that the U.S. Environmental Protection Agency step up monitoring activities before, during and after individual cleanups to determine whether it is working there and what combinations of techniques are most effective.

Download or read book Management of Dredging Contracts written by University of Wales. Institute of Science and Technology. Department of Maritime Studies. Dredging Research Unit and published by . This book was released on 1974 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guide Specifications for Civil Works Dredging written by United States. Army. Corps of Engineers. War Department and published by . This book was released on 1947 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dredging written by Richard Nicholas Bray and published by . This book was released on 2005 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dredging for Development written by International Association of Dredging Companies and published by . This book was released on 1997 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selection of Dredging Projects for Maximizing Waterway System Performance written by Kenneth Ned Mitchell and published by . This book was released on 2013 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dredging Engineering written by Fred Lester Simon and published by Theclassics.Us. This book was released on 2013-09 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ... C. E., "The earliest dredge of this type used in the United States was, it is believed, the Gen. Moultrie, used in 1855, at Charleston, S. C.... This dredge is stated to have been a moderate sized commercial steamboat, converted into a dredge by the addition of centrifugal dredging pumps with necessary piping, etc., and with bins constructed in the hold. Her drags, or suction heads, were probably somewhat similar to those now in use.... From 25 cents to $1.00 per cu. yd. for material dredged, according to locality and amount of work, was still (previous to 1890) considered a fair price for dredging on ocean bars; and on account of the great cost of dredging, the plan of deepening these bars by scour produced by jetties was regarded as the only practicable one." However, after the conclusion, in 1891, of six years of dredging, by contract, to deepen the entrance channel to New York Harbor, "the cost of maintaining the dredged channel to full width and depth has been found to be very moderate." The first suction hopper dredge built by the Government was the Charleston, in 1890, having one 15 inch pump and a bin capacity of 340 cu. yds. Between 1890 and 1900, three more were built, the performance of which effected such a reduction in the cost of dredging ocean bars as to question the economy of constructing the costly jetty for the purpose of deepening these channels. Since 1900, the Government has built a goodly fleet of these machines, probably the most intensive construction period being from 1901 to 1904, during which the total number constructed and under construction was 14. Two such dredges, the Caribbean and Culebra, built in 1907 by the Maryland Steel Company, of Baltimore, Md., were used in the construction of...

Download or read book Dredging Engineering written by F. Lester Simon and published by Envins Press. This book was released on 2008-11 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: PREFACE: With the readers indulgence, we will explain just what this small book is by first defining what it is not. It is not a compendium of statistics. Neither is it a record of the actual performance of specific dredges of all kinds and under all conditions nor yet a compilation of dredging cost data. Such information is already minutely available in the Annual Reports of the Chief of Engineers, U. S. Army, and in the records of the various departments of commonwealths and municipalities controlling dredging operations in their respective localities. It has been the authors intention first to describe the principal types of dredge in such manner as to impart a fundamental working knowledge of their construction and operation, and then to consider, in concise form, the usual problems confronting the engineer in the conception and accomplishment of dredging projects. Because of the fact that most literatureupon the subject, having been presented in the form of papers and articles in the technical periodicals, isnot onlynot readily available, but incomplete, in that each as a rule treats only of one particular phase of the subject, it is thought that a need exists for a comprehensive treatise, which should be helpful alike to the student and engineer. To fill thiswant hasbeen the authors objective. The importance of the subject, while not always ap- parent to the layman, is obviously paramount, involving the expenditure of many millions of dollars annually for the necessities of commercial life. BALTIMOEE, MD., April, 1920. Content includes: PREFACE CONTENTS PAGE ..- v ., ., .., ., . vii CHAPTER I. DEFINITION AND CLASSIFICATION 1 CHAPTER II. GRAPPLE DREDGES 4 General Description 4 6 The Bucket The Common Grab Bucket Axioms . The Sliding Cross-head Bucket Other Types Grab Bucket Details and Appurtenances Boom, A Frame and Back Guys Spuds, Spud-wells and Gallows-frame The Machinery The House The Hull Operation H CHAPTER III. DIPPER DREDGES 29 General Description 29 The Bucket 29 Boom, Dipper-stick, A. Frame and Back Guys 31 The Spuds ..... 37 The Machinery The Hull Operation 39 ..., ....... 40 ............. 41 Application of the Type 12 High-powered Dipper Dredges 44 CHAPTER IV. LADDER DREDGES 46 Historical 46 General Description 50 Stationary Type 52 Sea-going Hopper Type 52 CHAPTER V. Scows 54 CHAPTER VI. HYDRAULIC DREDGES OF THE RIVER TYPE 58 Radial Feeding Dredge with Spud-anchorage ......... 58 General Description ..... 58 Cutter Head and Ladder . . .... . . .... .... 61 Feeding v ......... 64 Boom, A Frame and Back . . Legs V . 66 The Pipe Line . 67 The Pump . . 71 ix 6 12 13 15 16 20 22 24 24 26 X CONTENTS PAGE Power 78 Method of Design ........ 79 The Machinery 81 Operation . 83 Booster or Relay Pumps 83 Forward-feeding or Mississippi River Type .......... 86 General Description CHAPTER Vll. HYDRAULIC DREDGES OF THE SEA-GOING HOPPER 86 TYPE., 89 Historical . . . . 89 General Description Advantages of the Type Typical Examples . . v . . . 91 PART II DREDGING CHAPTER VIII. OBJECTS AND PHASES OF THE SUBJECT 95 CHAPTER IX. PRELIMINARY ENGINEERING 97 Exploration of Site 97 Estimating the Quantities 100 Choice of Plant and Method of Disposal of Dredgings 107 Plans, Specifications and Contracts 118 Scheduling 121 Estimating the Cost 123 CHAPTER X...

Download or read book Dredging written by Denis Yell and published by Thomas Telford. This book was released on 1995-10-06 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guide highlights the particular problems of excavating from underwater sites, and describes the methods and equipment developed to overcome them. All the stages of dredging are considered, from project design specification and site investigation, to supervision of the actual dredging works.

Download or read book Providence River and Harbor Maintenance Dredging Project written by and published by . This book was released on 2001 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dredges and Dredging written by Charles Prelini and published by . This book was released on 1911 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: