Engineering condition survey and evaluation of Troy Lock and Dam, Hudson River, New York. Report 1, Engineering condition survey
Pace, Carl E.
Miscellaneous paperAbstract: A condition survey was made of Troy Lock and Dam (Phase I of the study). An analysis of the condition survey gives adequate information for sound engineering decisions needed for developing a proposal for the total evaluation of the lock and dam, which is to be accomplished in Phase II of the study. Initial observations of Troy Lock and Dam gave misleading impressions of structural deficiencies. The Phase I study revealed that the interior concrete of the lock is sound and of sufficient strength. The cracking of the concrete in the lock is negligible and is insignificant in the dam and gated spillway except for (a) the pier where the access to the dam tunnel on the powerhouse side of the river is located and (b) the piers of the gated section. It is recommended that concrete cores be obtained to determine the depth of deterioration of the surface concrete and typical cores be used for (a) petrographic analysis, examination for deteriorating agents, material property determination, and evaluating dam monolith contact with the foundation. Stability analyses should be performed on selected monoliths of the lock and dam. Stress analyses should be performed on the badly cracked monolith of the dam that contains the shaft which allows access to the dam tunnel from the powerhouse side of the river, and stress analyses should be performed on one monolith of the dam to determine the effects of water-produced vibrations. Specific methods of repair should be recommended. A feasibility study should then be made and the repair or replacement of Troy Lock and Dam should be suggested. If it is assumed that the structural evaluations in the Phase II study reveal no serious deficiencies and that the concrete cracking in the dam and gated spillway can be effectively repaired and preventative measures implemented, the lock, dam, and gated spillway are structurally adequate and can be repaired. At this stage of the study, all conditions have not been evaluated such that the feasibility of repair is certain, but the Phase I study indicates that repair is highly feasible if the deficiencies listed herein can be economically corrected.
Concrete Laboratory (U.S.)Engineer Research and Development Center (U.S.)
Dam stability; Engineering conditions survey; Hudson River; Locks (Waterways); Troy Lock and Dam
Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; C-78-6 rept.1.
Approved for public release; distribution is unlimited.