Accession Number:

ADA000329

Title:

Filling and Emptying System, John Day Lock Columbia River, Oregon and Washington; Hydraulic Model Investigation,

Descriptive Note:

Corporate Author:

ARMY ENGINEER DIV NORTH PACIFIC BONNEVILLE OREG DIV OF HYDRAULIC LAB

Personal Author(s):

Report Date:

1974-07-01

Pagination or Media Count:

79.0

Abstract:

The John Day lock chamber, culverts, and portions of adjacent approach channels were reproduced in a 125-scale model to test the original design and to develop required revisions. Vortexes over the original intake manifolds were eliminated by reversing the left intake. Pressures in the filling culverts were satisfactory. Turbulence inside the lock chamber was reduced by overhanging roofs to baffle jets from adjacent lateral culverts and by sloping the tops of ports. Probable cavitation in 90-degree bends downstream from emptying valves was avoided by moving the valves downstream from bends. The final design lock filled in 11.7 and emptied in 13.8 min initial head 113 Ft. Typical maximum hawser forces on an eight-barge tow averaged 5.4 tons filling and 1.8 tons emptying transverse forces were 1.5 tons or less. A maximum instantaneous load of 62.5 tons and an instantaneous change of 22.0 tons were measured on the left filling valve lifting rod. Maximum load on the valve trunnions was 686 tons. Modified author abstract

Subject Categories:

  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE