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 0 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.

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 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 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 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Filling and Emptying Systems for St Anthony Falls Locks Mississippi River Minnesota written by Saul Fidelman and published by . This book was released on 1964 with total page 180 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 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 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 1960 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Filling and Emptying Systems for a Proposed 600 ft Lock at Lock and Dam No 19 Mississippi River Keokuk Iowa written by and published by . This book was released on 1962 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lock Filling and Emptying System Holt Lock and Dam Warrior River Alabama written by Thomas E. Murphy and published by . This book was released on 1965 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Lock and Dam 1 Mississippi River Minneapolis St Paul Reconnaissance Report for Hydropower written by and published by . This book was released on 1981 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by United States. National Bureau of Standards and published by . This book was released on 1951 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Lower Lock and Dam Tainter Gates St Anthony Falls Upper Harbor Project Mississippi River Mineapolis i e Minneapolis Minnesota written by and published by . This book was released on 1960 with total page 52 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 1960 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydraulic Research in the United States written by and published by . This book was released on 1951 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt: