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Coconino County Cinder Lake Investigation

Coconino County Cinder Lake Investigation. Jamie P. Macy, Lee Amoroso, Jeff Kennedy, and Joel Unema U.S. Geological Survey. In cooperation with Coconino County, AZ and the U.S. Forest Service. Study Area. Schultz Fire. July 19, 2010 flood from Schultz Fire runoff.

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Coconino County Cinder Lake Investigation

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  1. Coconino County Cinder Lake Investigation Jamie P. Macy, Lee Amoroso, Jeff Kennedy, and Joel Unema U.S. Geological Survey In cooperation with Coconino County, AZ and the U.S. Forest Service

  2. Study Area

  3. Schultz Fire

  4. July 19, 2010 flood from Schultz Fire runoff

  5. Ditchesmove water to Cinder Lake Area Campbell Copeland

  6. Objective • The objective of this study is to determine the depth of cinders to basalt in the Cinder Lake area for potential water storage of runoff from the Schultz Fire burn area in northeast Flagstaff, AZ.

  7. Approach • Monitoring Wells • 4 boreholes • Geophysical Surveys • TEM • Other geophysical techniques (CSAMT and GPR) • Stream gages • 2 USGS stream-gages • USGS Cooperative Support • Gravity Measurements • Report Publication

  8. Cinder Lake Investigation

  9. Drilling

  10. Marijka WellinDoney Park Doney Park WellDPW-1 Sunset Crater Well

  11. Black Cinders Well Cl-1 Sand and Silt Sand, Silt, and Clay Cinders and Clay Black Cinders Large Black Cinders Sand Large Black Cinders Silty-Sand Basalt Provisional Data-Subject to Change

  12. Well Cl-3 Water Storage acre-ft % Porosity Black Cinders 56% 588 acre-ft 171 acre-ft 38% Sand, Silt, and Clay 52% 156 acre-ft Sandy Cinders Silty-Sand 34% 612 acre-ft 38% 456 acre-ft Silty-Sand Sandy Cinders 1092 acre-ft 52% Sand Sandy Cinders 432 acre-ft 36% Silty-Sand Cinders 258 acre-ft 43% Basalt Estimated total storage for study area is ~4,000 acre-ft Provisional Data-Subject to Change

  13. No water in Wells & Fractured Basalt

  14. Water-Level Monitoring Equipment • Wells are outfitted with pressure transducers for continuous water-level monitoring • Wells outfitted with telemetry Provisional Data-Subject to Change

  15. USGS Streamflow-Gages • Copeland Ditch • Girl’s Ranch Ditch

  16. USGS Streamflow-Gages • Gages Installed August 5, 2011 • Copeland Ditch 2011 • August-September ~44 acre-ft • October-present ~25 acre-ft • Girl’s Ranch Ditch 2011 • September ~6 acre-ft

  17. Geophysical Investigation

  18. TEM Well 2 Well 1 Well 3 Cinder and Alluvial Deposits Basalt

  19. Gravity • 19 gravity measurement locations • 7 wells (blue dots), other 12 (red dots) located throughout Cinder Lake • Absolute and relative measurements • Is water moving vertically or horizontally?

  20. Gravity • Green dots ~ 2.5 ft of water added to the subsurface • Yellow dots - little to no water added to the subsurface • Red dots – no water added to the subsurface PROVISIONAL DATA – SUBJECT TO CHANGE

  21. USGSOpen-File Report http://pubs.usgs.gov/of/2012/1018/

  22. Thank You & Questions Jamie P Macy USGS - Flagstaff Programs 2255 N. Gemini Dr. Flagstaff, AZ 86001 Email: jpmacy@usgs.gov Phone: 928-556-7276

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