Figure1. Smoke chart recordi63.98 mi4(2-313a5(the)67.923 s664 4n)-3 -346(se)-344664ent54 41444 ion4 74ipe

sticker. Recalibration is required where applicable and as necessary whenever dredging conditions

change in a manner affecting equipment calibration or if the inspector suspects data output to be

inaccurate.

Louisville District: The Louisville District uses leased hydraulic cutterhead dredges to perform

maintenance dredging on the Ohio River. Like the New Orleans District, smoke charts of suction

and discharge pressures and recordings of pump rpm's were used by the Louisville District, but in

1992, additional dredging parameters and a different data presentation format were added in the

contract specifications. Additional operating parameters required by the new specifications in-

cluded slurry density and velocity in the pipeline, the suction pipe inlet depth, swing cable and