Propeller_Condition.zip

This file is a compressed archive (ZIP file) containing condition assessment documentation for propeller components related to the John Day Fish Pump Rehabilitation project. The archive supports the U.S. Army Corps of Engineers Portland District solicitation W9127N26BA001, a Total Small Business Set-Aside firm-fixed price contract for rehabilitation of Fish Pump Units 1, 2, and 3 at John Day Dam in Oregon. The propeller condition documentation provides technical baseline information on the existing equipment condition and specifications necessary for contractors to develop accurate repair and rehabilitation proposals. This technical data is essential for the precision machining, refurbishment, and replacement work required under the contract, which includes removal and replacement of damaged pump shafts and bearings, repair-by-replacement of approximately 1000 horsepower class power transmission and reduction gearboxes, precision machining of shafts and bearing housings, installation of greaseless bearing liners, and on-site reassembly and alignment per manufacturer specifications.

The propeller condition file supports contractor understanding of the mechanical tolerances and restoration requirements established during prior rehabilitation of Fish Pump No. 3, including the nominal 1/8" radial clearance specifications for blade tips to pit liner and 0.004-0.006" clearance requirements for propeller center bores to shaft fit. This documentation enables prospective bidders to accurately scope the field disassembly, off-site shop repair, fabrication, and reinstallation work required for the remaining pump units, ensuring firm-fixed price proposals reflect the specific technical challenges and precision requirements of the rehabilitation effort.