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the flow at 002 by the same amount. Pump rates would vary but a typical • pumping pattern is expected to be at a rate of approximately 300 gpm. The pump would run from thirty minutes to an hour and remain off from lwo to four hours. This schedule would continue around the clock. Discharge will be into a steep, rugged canyon with slopes ranging from 5 - 100%. The average slope is 11.5%. The majority of the 5,240 feet of flow length to the river is eroded down to the sandstone bedrock. Gentle slopes may have shallow sandbars. Large sandstone boulders litter much of the channel bottom. The channel bottom between the steep rock sides is generally 20 - 40 feet wide. Water from the channel is not directly used for domestic or agricultural purposes. Discharge in the channel is not expected to be erosive or add to the suspended solids. The regular presence of water in the channel may promote vegetative growth in the small sand bars. The quality of the water will vary with the source and underground handling methods but is expected to be similar to 001 and 002 outfall quality. r 1 LJ The Colorado Department of Health, Water duality Control Division, required a study in 1992 to determine different forms of treatment that might be cost effective in reducing salt loading on the Colorado River. The results were provided to the Health Department and a determination was made that it is not economically feasible to construct a salt removal/minimization facility at this time. Water handling patterns in the mine can affect the amount of salt discharged. The longer the water remains in mined out areas, the higher the salt loading. _o-.~et~.Ghe.~aoi I,u~har~gj~g~5tin'fn'g~l eo atio"Fas~a'~Fid~ra'Ssoei-aCed gypa~~e pe uuttd.ng~saftrredt7ct'of`n~ruith~the~®~,uision~byopti~mi2img~ w ~ng pmt e~,n~s~js,~o,~,~easib(,e~ The projected discharge from the Roadside North and South Portals is 410 gpm or 0.91 cubic feet per second (cfs), and the average flow of the Colorado River is approximately 3,550 cfs. Upstream and downstream water quality sampling 19-8 (New 3/1/96)