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Flagstaff Plans for a New Groundwater Well in its Portfolio

Specialized dual rotary rigGroundwater wells supply about 65% of Flagstaff’s potable water needs. Fort Tuthill #2 is the first well drilled since 2009. Drilling on this second well at Ft. Tuthill  began in February and will augment the city’s southwest distribution system, producing an expected flow rate of 250 to 1,200 gallons per minute.

Well-drilling on the Colorado Plateau, including tapping into the Cococino Aquifer, is challenging, with the top of the aquifer averaging 1,000 feet through difficult rock layers. Site locations are determined by a host of geophysical studies. The bottom of Ft. Tuthill #2 will likely be  2,500 feet. The drilling contractor, Boart Longyear of Salt Lake City, employs an efficient, dual rotor technology that saves money and produces a straighter well. 

This project is the first of five wells in the capital plan to meet demands for water supply triggered by growth, the wells do add resiliency to the city’s water supply, buffering against climate change or infrastructure failure. While the entire city benefits from this new water resource over time, the additional supply need is a cost paid by capacity (new development) fees and does not impact user rates.

Follow along with the well drilling progress through this interactive story map. Stay tuned for a video on well drilling in Flagstaff.

Questions or comments? Reply to or call Lisa Deem, at (928) 213-2471

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Blog Archive


April: Coconino Estates Improvements Continue This Summer (PDF)

March: Keep Flagstaff's Water Clean: Only Snow and Rain in Stormwater Drains (PDF)

February: Rio de Flag Water Reclamation Plant Receives Necessary Upgrades (PDF)

January: McAllister Well and Pumphouse Adds Capacity to our Water System (PDF)


December: Woody Mountain Clarifier Project Wraps Up 2020 Capital Improvements (PDF)

November: Updates on Capital Improvement Projects Started in Summer 2020 (PDF)

October: Planning for Flagstaff's Water Future (PDF)

September: Flagstaff Water Services Receives Two National Water Conservation Awards (PDF)

August: Updates on Stormwater Maintenance in Flagstaff (PDF)

July: Ground-Breaking Infrastructure Upgrades Continue This Summer (PDF)

June: Focus on Infrastructure Development for Summer 2020 (PDF)

May: Brad Hill, Water Services Director, Retires After 12 Dedicated Years (PDF)

April: Keeping Your Water Clean and Safe (PDF)

March: Linda Vista Drive Construction Tackles Two Water Projects Simultaneously (PDF)

February: Are There "Forever Chemicals" in Our Drinking Water? (PDF)

January: Planning for the Next Decade (PDF)


July: Inner Basin Pipeline repaired just in time to aid Fire Operations (PDF)

June: Control Room Modernization at Lake Mary Water Treatment Plant (PDF)

February: Upgrades at Rio Water Reclamation Plant Improve Efficiency & Safety (PDF)


December: NAU and Flagstaff Water Services Create Winning Partnerships (PDF)

November: I-40 Transmission Line (PDF)

June: New Aerator Protects Aquatic Life in Frances Short Pond (PDF)

May: How TV Vans are a Driving Force for Efficiency (PDF)

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