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Meetings & Events
If you would like to present at a future chapter meeting, contact us at [email protected]. Note that we can no longer issue refunds for cancellations; in addition, you must pay in advance — we cannot take payments at the door or invoice you after an event.
March Chapter Meeting-
Join us in learning from Julia Fonseca from Madrean Resources on Arizona Politics and the Colorado Compact
- Date: March10th, (registration closes at 3 pm on that day)
- Time: 6:00 PM -7:30pm
- Place: Montgomery & Associates, 1550 E Prince Rd
- Cost: $5 In-person members, $10 in-person non-members, free for student members.
- This meeting will also be available via Zoom. If joining on Zoom, the presentation will start at 6:30pm.
Presentation: Arizona Politics and the Colorado Compact
Despite benefiting from early federal investments in dam building, between 1923 and 1944 the state of Arizona opposed approval of the Colorado Compact governing use of the Colorado River. The state largely relied on poorly informed boosters to inform its early plan’s for river uses. W. S. Norviel, the lawyer who represented Arizona in the Colorado Compact negotiations engaged two important studies of potential damsites and canals, but was forced to resign by Governor G. W. P. Hunt in 1923. Gutting Norviel’s office and ignoring inconvenient engineering facts impaired the ability of Arizona’s leaders to negotiate with other states and to adjudicate competing water claims within the state. Alternative plans were never investigated. Arizona’s misguided belief that the state could prevent the federal dam construction on the Colorado River bordering or within Arizona and build its own dams proved erroneous. Opposition to the Compact ultimately delayed delivery of additional federal reclamation assistance. This early history of missteps and misunderstandings helps explain why the users of the Central Arizona Project are so vulnerable to shortages on the river.
About Julia Fonesca:
Julia Fonseca is a hydrologist, lately consulting as Madrean Resources. This presentation is largely based on her archival research of primary materials since retiring. While at Pima County Regional Flood Control District, she was the project manager for various recharge feasibility studies in the Tucson area, which culminated in the Lower Santa Cruz Replenishment Project for CAP recharge and the Marana High Plains effluent recharge project. Later, she helped to develop County programs for riparian protection and restoration, native plant use, and compliance with and monitoring for various environmental laws.

1922 meeting of the Colorado Commission on the banks of the Colorado River. US Bureau of Reclamation photograph”
All attendees must register in advance. The deadline for registering must be done before 3pm the day of the event. We will turn away walk-ins! This applies to professionals and to students. We need to know the number of attendees in advance so we can plan accordingly. Likewise, if you sign up but later find that you cannot attend, please let us know so we can open up your spot for someone else. Please respect these ground rules… and register early to ensure that you reserve your spot.
Chapter Officers & Board Members
2026 Chapter Officers
- President: MIlan Calendine, Certerra
- Vice President: Mekha Pereira, Montgomery & Associates
- Treasurer: Maya Teyechea, Trinity Westland
- Secretary: Libby Wildermuth, U.S. Geological Survey
- Chapter Board Member at Large: David Barnes, GEOSCIENCE Support Services
- Chapter Board Member at Large: Marleigh Nicholas, Montgomery & Associates
2026 Corporate Board Members
- Corporate Treasurer: John Villinski, Clear Creek Associates
- Corporate Board Member: David Goodrich, Retired USDA-Ag Research Service
You can contact board members via email at [email protected].
Chapter News
- Halpenny Internship OverviewMy experience with the Leonard Halpenny Intern Scholarship this past summer was quite enlightening, enjoyable, and valuable to me as I prepare to make the next steps in my career in hydrology. I was able to see and experience some…
- Tucson Chapter Holiday Bash to Be Held at the Botanical GardensThis year’s annual holiday party will be held at the Tucson Botanical Gardens. Join AHS Tucson for a special evening at the Tucson Botanical Gardens on Monday, December. Enjoy the festive atmosphere among garden paths and local desert flora, celebrating…
- Congratulations to Our 2024 Halpenny Intern Scholar, Samuel Booker!The Tucson chapter is pleased to announce that it has selected the Leonard Halpenny Inter Scholar for 2024. Samuel Booker is a junior pursuing a degree in hydrology and water resources at the UA. He is looking forward to working…
- Order Your AHS Beer MugNow’s your chance to grab one or more AHS mason jar beer mugs. If you order by September 4, you can pick your mug up at the 2023 AHS Symposium. If you’re not planning to attend the symposium, you can…
- 2023 Halpenny Scholar AnnouncedThe Tucson chapter has selected this year’s Halpenny Intern Scholar: Natalie Yurek. Natalie is a rising junior in the UA’s Hydrology and Atmospheric Science (HAS) program. She is interested in exploring the interplay between Earth, atmosphere, and water systems by…
- Mission Garden Tour RecapOn February 18, a group of folks from the Tucson chapter joined Chuck Graf, our 2018 AHS Lifetime Achievement Award winner, for a tour of Mission Garden and surrounding areas. Mission Garden was originally part of, and served, the village…