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Title: Analysis of tow entry, locking, and exit times at Lock and Dam 51, Ohio River
Authors: United States. Army. Corps of Engineers. Louisville District.
Daggett, Larry L.
McCarley, Robert W., 1937-
Stinehour, Judith E.
Keywords: Lock and Dam No. 51
Ohio River
Hydraulic structures
Tow entry
Towed bodies
Waterway transportation
Inland navigation
Publisher: Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; H-74-4.
Description: Miscellaneous Paper
Abstract: An analysis of a large sampling of the tow traffic data taken in 1969 at Lock and Dam 51 (L&D 51) on the Ohio River was needed primarily to provide a data base for the development of an improved standardized method for sequencing tows waiting in queue. Traffic congestion at L&D 51 bas become an increasingly serious problem in recent months, as has been the case at a number of other locks. This situation has intensified interest in low-cost operational improvements which can help alleviate the congestion at such locks without the necessity for expending large sums for structural improvements. Through an analysis of available tow traffic data, literature reviews, and discussions with knowledgeable Corps personnel, it was attempted in this investigation to determine easily identifiable and recordable physical parameters that, as a rule, have a recurring positive influence on the steps of the lockage procedure, i.e., tow entry, locking, and exit. The quality and scope of the available data did not permit as comprehensive an analysis of all significant parameters as desired, but, for the first time, the effects of certain parameters were isolated and quantified to a usable degree of accuracy. Parameters for which an acceptable degree of meaningful information was obtained were (A.) entry type (long and short), (B.) lockage type (single, double, knockout, and setover) , (C.) direction of travel (upstream and downstream), and (D.) commodity loading (empty and loaded). Other less successful attempts were made to analyze the combined effects of towboat horsepower and commodity loading on tow entry and locking times. An unsuccessful attempt was also made to analyze the degree of loading as a function of the ratio of number of loaded barges to total number of barges in order to quantify the influence of this parameter on entry and locking times. This report is limited primarily to a discussion of those parameters that could be satisfactorily analyzed. Very little information could be gleaned fran an analysis of the tow exit times. Unfortunately, the exit time of most tows was recorded only to the nearest 5 min regardless of size, power, or other such factors that contribute to tow speed and maneuverability. The collection of additional data recorded to the nearest minute would undoubtedly provide the necessary data for a more accurate analysis of this and other steps of the lockage procedure.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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