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IdATER RESOURCES EXHIBIT G ~e~ls ,J~ aUV d~ ' The Nyholt property is located just west of the South Platte River. The Brantner Gulch enters the property at about the halfway point of the west ' property line then flows north, parallel with the westerly property line to the northwest corner. The mining plan allows for the gulch to maintain its flow along the west property line. Mining on the property will set back from ' \the gulch and at its closest point is approximately 50 feet west of the mining operation. A 36" diameter C.M.P. culvert crosses Henderson Road and drains onto the ' Nyholt property. The maximum capacity of this C.M.P. is 68 c.f.s. for inlet control conditions. The actual capacity of this culvert is much less than I 68 c.f.s. because at the time of my inspection, the culvert was about 90% C ' plugged with silt, sediment: and debris. The drainage water from this culvert ponds on the Nyholt property until it reaches sufficient depth to drain into ' the Brantner Gulch along the North property line. The flowline elevation of the Brantner Gulch as it enters the Nyholt property at the west property line v, , ~., ` '~ ~~~ ~~~ ,. )y ~~ ~~ ~ ~~_ ~~c through the concrete box culvert is about 2.5 feet higher than the invert out elevation of the 36" diameter C.M.P. Therefore, it is impractical to try to channel the flow from the 36" diameter C.M.P. to the Brantner Gulch. Drainage 1 water from this culvert will, therefore, be accomodated on-site. At no time will the property or lake be diked so as to block excessive ' drainage. There are no other waterways, canals, dams or reservoirs on the property. .~ It is expected that the lake excavated on ttae property will join the County - lake to the east. If this is the case, the pit will be dewatered a few feet at times when overburden removal coincides with high spring water tables, under (13) 1