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Big Thompson River Forecasting

Big Thompson River Forecasting. Eastern Colorado Area Office. Manages projects local to Colorado’s Front Range Numerous activities and responsibilities Two main projects: Colorado-Big Thompson Fryingpan-Arkansas. The Eastern Colorado Area Office in Loveland, CO.

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Big Thompson River Forecasting

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  1. Big Thompson River Forecasting

  2. Eastern Colorado Area Office • Manages projects local to Colorado’s Front Range • Numerous activities and responsibilities • Two main projects: • Colorado-Big Thompson • Fryingpan-Arkansas The Eastern Colorado Area Office in Loveland, CO

  3. The Colorado-Big Thompson Project

  4. Willow Creek Dam and Reservoir

  5. The Colorado-Big Thompson Project

  6. Three Lakes Collection System

  7. Granby Dam, Reservoir and Farr Pump • Largest reservoir • Serves as “savings account” for project • One dam, three dikes • Releases to Colorado River

  8. The Colorado-Big Thompson Project

  9. Shadow Mountain Reservoir and Grand Lake Shadow Mountain Reservoir near the dam, the “boatable” canal, and Grand Lake clarity

  10. The Colorado-Big Thompson Project

  11. Alva B. Adams Tunnel • Logistical solution • Built 1940-47 • 13.1 miles long • Under RMNP • 9.5 ft in diameter

  12. The Colorado-Big Thompson Project

  13. The Colorado-Big Thompson Project

  14. The Colorado-Big Thompson Project

  15. The Colorado-Big Thompson Project Natural Inflow can be Skimmed

  16. Limited Capacity / High Variability

  17. Big Thompson Forecasting Project • CHPS FEWS System • Natural Inflow to Lake Estes • Natural Flow on North Fork at Drake • Big Thompson River at Mouth of Canyon • Forecasts • 1-hr Timestep • Short-term • Ensembles

  18. Big Thompson Forecasting Project • Implemented by Riverside • Operated 2013 by ECAO • Transferred to MBRFC in 2014 • Partnership for Forecasting • MBRFC—Day-to-day forecasting and maintenance • ECAO—Occasional forecasting and scenario investigation

  19. Thank you and Questions

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