Silver Creek - Division of Water Quality - Utah.gov
Silver Creek - Division of Water Quality - Utah.gov
Silver Creek - Division of Water Quality - Utah.gov
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>Silver</strong> <strong>Creek</strong> <strong>Water</strong>shed TMDL Final Report<br />
Above Atkinson<br />
Zinc concentrations are highest during the Winter months (Nov. through Feb.) and lowest during<br />
late Summer and Fall (Sept. through Oct.). <strong>Water</strong> quality standards for zinc are exceeded for<br />
most <strong>of</strong> the year. Zinc concentrations reach up to six times the chronic standard. Flow fluctuates<br />
during the year with the highest flows during late Winter and early Summer. During the<br />
irrigation season, a significant flow is typically diverted into the Pace Family Irrigation<br />
Diversion. This diversion takes water from <strong>Silver</strong> <strong>Creek</strong> just below Richardson Flat and returns<br />
between the Atkinson and Above Atkinson water quality sampling stations.<br />
Cadmium concentrations are the highest during the Winter months (November through<br />
February). Late Summer and early Autumn months (July through October) have never had<br />
values above the detection limit. Chronic water quality standards are typically exceeded during<br />
the rest <strong>of</strong> the year.<br />
Above Atkinson (492680)<br />
Bi-Monthly Zinc Concentrations<br />
Zinc Concentration (mg/l)<br />
8.0<br />
7.0<br />
6.0<br />
5.0<br />
4.0<br />
3.0<br />
2.0<br />
STORET Average (1990-2002)<br />
Overall Average<br />
STORET Samples (1990-2002)<br />
USGS (2002)<br />
Chronic Zn Standard (0.39)<br />
1.0<br />
0.0<br />
0 Jan 1 - Feb Mar - Apr<br />
2 May 3- Jun<br />
Jul - Aug<br />
Sep-Oct Nov - Dec<br />
4 5 6 7<br />
Bi-Monthly Period<br />
Figure 13: Above Atkinson Bi-Monthly Zinc<br />
Page 24
Change language