Download or read book Modifications to Filling and Emptying System of Lock No 1 Mississippi River Minneapolis Minnesota written by Jackson H. Ables and published by . This book was released on 1979 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modifications to Filling and Emptying System of Lock No 1 Mississippi River Minneapolis Minnesota written by Jackson H. Ables and published by . This book was released on 1979 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modifications to Filling and Emptying System of Lock Number 1 Mississippi River Minneapolis Minnesota Hydraulic Model Investigation written by and published by . This book was released on 1979 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: The existing locks at Locks and Dam No. 1 were constructed between 1929 and 1932. Problems have been experienced with accumulation of ice and debris at the intakes, air entrapment in the culverts of the filling and emptying system, excessive turbulence in the lock chamber during filling, and hazardous conditions downstream from the locks during emptying operations. Also, the stoney gates used for control of filling and emptying, the miter gates, and miter gate operating machinery are in bad condition. Various elements of the filling and emptying system were developed in a 1:25-scale hydraulic model for use in rehabilitating the locks. Both the landward and riverward locks were investigated and recommended design and modifications were furnished to accomplish rehabilitation of both locks although only the landward lock will be completely rehabilitated. Major modifications to the locks will include constructing new intake manifolds, lowering the roof of the filling and emptying culverts and changing their shape, constructing new sidewall ports, replacing the stoney gates with tainter valves, and constructing new culvert outlets. With the rehabilitated system, the lock could be filled in 10.2 min and emptied in 10.6 min with a 4-min valve time and a 37.8-ft lift.

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1982 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book List of Publications of the U S Army Engineer Waterways Experiment Station written by U.S. Army Engineer Waterways Experiment Station and published by . This book was released on 1980 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lock Hydraulic System Model and Prototype Study Data written by Ellis B. Pickett and published by . This book was released on 1988 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes a data base which contains descriptions of navigation lock studies conducted by the Corps of Engineers during 1937-1984. The data base identifies measured quantities, lock features, and a complete bibliography of reports. Data base maintenance and management are automated by means of computer software.

Download or read book Vortex Problem at Intake Lower St Anthony Falls Lock and Dam Mississippi River Minneapolis Minnesota written by Jackson H. Ables and published by . This book was released on 1979 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Institution of Civil Engineers written by and published by . This book was released on 2002 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1980 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book List of Publications of the US Army Engineer Waterways Experiment Station written by and published by . This book was released on 1990 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Upper Mississippi River Lock Filling and Emptying System Hydraulic Model Investigation written by and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Navigation improvements including lock extensions are being investigated for several existing projects on the Upper Mississippi River (UMR). A hydraulic model study was conducted to evaluate filling and emptying system design alternatives for the extension of lock No. 22 and lock No. 25. A 1:25 scale model was constructed to determine the range of lock performance for both locks. The filling system flow capacity was not significantly changed from the original non-extended lock design. The filling time for acceptable chamber performance with the 4.57-m (15-ft) lift was 23.1 min. This filling time was achieved with a 23-min valve. The focus of the study was to determine emptying performance for multiple options of emptying gates built in the extended portion of the lock chamber river wall. Several emptying system designs were studied. The type 2 and 3 design provided the best chamber performance during the emptying operation.

Download or read book Public Works for Water and Power Development and Energy Research Appropriation Bill 1979 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Public Works and published by . This book was released on 1978 with total page 1550 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mississippi River Illinois Waterway 12 Foot Channel Study written by United States. Army. Corps of Engineers and published by . This book was released on 1972 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Summary of Investigations in Support of the Civil Works Program written by Waterways Experiment Station (U.S.) and published by . This book was released on 1962 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book LOCK AND DAM NO 1 MISSISSIPPI RIVER MINNEAPOLIS MINNESOTA DESIGN MEMORANDUM FOR REHABILITATION written by United States. Army. Corps of Engineers. St. Paul District and published by . This book was released on 1958 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pool Lowering at Lock and Dam 1 Using the Lock Filling and Emptying System Mississippi River Minnesota written by and published by . This book was released on 2001 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study is to determine what limitations must be placed on the use of the lock culvert system if used as a means of pool drawdown. Guidelines and operation procedures must be developed and documented to provide instruction for lock operators for lock culvert valve operation during an emergency. The hydraulic model study (Ables 1979) found that low pressures exist in the lock culvert during the unsteady flow of lock operations. The steady flow obtained during pool lowering could produce even lower pressures, which might induce cavitation in the culvert filling and emptying system. These conditions must be considered in any potential long-term operation of the lock system for releases other than normal lock operation. A numerical model study of the lock system would provide information for simulations of different head and tailwater conditions. Discharge and pressures for steady-state flows requires model validation with prototype data for similar operating conditions. Information needed for numerical model validation were the upper and lower pool elevations, gate position, and lock culvert soffit pressures downstream of the filling and emptying valves.