the ponds ranges from l~9to 12.5 hours for runoff from a tenyear twenty~fou~hour storm event, Two other ponds have sixteen and twenty~twohour detention times. The BBCC proposal to mine onridges is not often done in Illinois. Rec. 2), BBcC,however, contends in its motion for expedited decision thatit only recently became aware that a variance woul...
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