Locations of sites sampled.
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1 06713500 Cherry Creek at Denver	7 06752000 Cache la Poudre River at mouth of canyon, near Fort Collins
2 06714000 South Platte River at Denver	8 06753400 Lonetree Creek at Carr
3 06719505 Clear Creek at Golden	9 06753990 Lonetree Creek near Greeley
4 06720500 South Platte River at Henderson	10 06754000 South Platte River near Kersey
5 06731000 St. Vrain Creek at mouth, near Platteville	11 06759910 South Platte River at Cooper's Bridge,near Balzac
6 402114105350101 Big Thompson River below Moraine Park near Estes Park	12 06765500 South Platte River at North Platte, NE