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Show " 4. How much of the sediment produced directly or indirectly from the road prism can be expected to enter live water ( tons/ year)? " 5. What will this sediment mean in terms of ecological change in the water environment? " 6. If natural peaks from spring runoff are eliminated, how long will the sediment problem persist ( in years)? " 7. What will flood hydrographs look like as a result of the increased runoff after road construction? " B. Streams " Answers to the following questions are essential for accurate assessment of the environmental impacts of the Central Utah Project: " 1. Water pollution, particularly sedimentation from construction activities, will occur. What streams and reservoirs will be affected, and what amounts of sediment can be expected ( tons/ years)? " 2. How will Utah's no degradation law apply to turbidity increases? " 3. What is a reasonable turbidity increase? This should be defined JTU's or some other standard measurable unit. " 4. All figures mentioned in the proposal for power operation show Three Forks powerplant as capable of handling 600 c. f. s. discharge. They also show the proposed aqueduct below Three Forks powerplant as capable of handling only 200 c. f. s. Does this mean 400 c. f. s. will be sent down the natural Diamond Fork channel? If so, is this to be a continuous 400 c. f. s. or 400 c. f. s. once a day for a period of 2 hours or some other combination lying somewhere in between? This makes a drastic difference as far as public safety, livestock safety, wildlife safety, and channel stability as well as other variables. Capacities and totals don't tell you much if you doa't know rates, rates of change, and time 260 |