WSP01461

• File Number: 8549.800
• Description: Rio Grande Basin-Miscellaneous Small Projects and Project Studies-Rio Grande Assessment
• State: CO
• Basin: Rio Grande
• Water Division: 3
• Date: 2/1/1981
• Author: Brandes Kier Stecher
• Title: Water Resources Reference Base for the Assessment of the Rio Grande Region
• Water Supply Pro - Doc Type: Report/Study

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Table 5 (Cont'd)

NOTES:

1. Standards apply only to flows above 350 cfs.

2. Standards do not apply for Cabal 10 Reservoir below 25,000 acre-feet.

3. Standards apply only during flows In excess of 100 cfs.

4. Standards do not apply for Elephant Butte Reservoir below 100,000 acre-feet.

5. Standards for TDS~ 504, and CI are monthly average concentrations at mean monthly flow above 100 cfs.

6. Additional standards:
AmmonIa nitrogen shall be less than 0.2 mg/I.
DIssolved oxygen shal I be greater than 6.0 mg/I or 85% of saturatIon, whichever Is greater.
Nitrate nitrogen shal I be less than 0.8 mg/I.
Total chlorine residual shal I be less than 0.002 mg/I.
Total organic carbon shal I be less than 7 mg/I.
Total phosphorous shal I be less than 0.1 mg/I.

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7. CondUCTivity shal r be less than 400 umhos (700 umhos for perennial reaches of V~I leclto Creek).

8. The dIssolved oxygen shal I be greater than 6.0 mg/I (except tor Santa Fe River where DO shal I be greater than 4.0 mg/I).

9. Temperature shal r be less than 22 degrees C (except for Santa Fe River upstream to Siler Road where temperature shal I be less than 30 degrees Cl.

10. Conductivity shal I be less than 300 umhos.

11. Conductivity shall b. less than 500 umhos ( 1000 umhos for Coyote Creek) .
12. Conductivity shall be less than 400 umhos (500 umhos for the Rio Fernando de Taos).
13. Standards for TDS, S04' and CI apply for al I flows above 50 csf.
14. Standards do not apply at Avalon ReservoIr when tho pool size Is below 1,200 acre-feet.
15. Standards do not apply when pool size Is below 6,000 acre-feet.

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16. Conductivity shal I be less than: 600 umhos In Eagle Creek; 1100 umhos In Bonito Creek; 1500 umhos In the Rio Ruldoso.

17. Standards do not apply when the pool size Is below 24,000 acre-feot.

le. Standards for TDS, 504, and CI apply for al I flows above 10 cfs.

19. COnductivity shal I be less th~n 500 umhos.

20. For mean monthly flows above 100 cfs the mean monthly values of TD5, 504 and CI should be less than 500, 150, ~nd 25 mg/I, respectively.

21. New and more comprehensive standards presently are being proposed for stream segments In the Rio Grande Basin of Colorado. These Include
numerous criteria for physIcal and bIologIcal parameters (DO, pH, Coliform), Inorganic constituents (NH , CI , S, atc.) and metals (As, Cd,
Cu, Pb, etc.). 3 2