The purpose of CGWA is to advance the understanding of groundwater hydrology among its membership and the residents of Colorado. CGWA organizes monthly speaker presentations, field trips, community volunteer opportunities, social/networking events and publishes a quarterly newsletter. We are committed to facilitating the wise use of the State's groundwater resources by providing a forum to examine the scientific, technical and policy-making issues related to groundwater.
From its inception in 1981, CGWA has been a positive and proactive organization. Because of the voluntary efforts of its members, the Association has played an active role in shaping the use and protection of groundwater in Colorado. CGWA leverages the diverse areas of expertise of its members and expands the scope of the profession of groundwater hydrology often cooperating with other related organizations to sponsor conferences.
Board of Directors
Kelsey Haworth has a Bachelor of Science in Watershed Science from Colorado State University and is a Hydrologist with White Sands Water Engineers. She has experience in substitute water supply plans, augmentation plans, change cases, water accounting, well rehabilitation, aquifer testing, and water quality sampling. Kelsey enjoys spending time at the lake and in the mountains with her husband.
Betsy Semmens has 20 years of experience as a groundwater professional in Arizona and Colorado. She works for Golder Associates specializing in numerical modeling. Betsy is married and has two teenaged kids. In her free time she enjoys running, reading, and endlessly driving her kids all over town.
Hoyt B Sutphin has a M.S. in Geology from Northern Arizona University and a B.S. in Geology from SUNY Geneseo. He is a licensed Professional Geologist in Utah and a state of Colorado listed UST Consultant. Hoyt has been a CGWA member since 1996 and the Treasurer for 10+ years. He is a Senior Project Manager with CH2M in Englewood and his focus is groundwater assessment and remediation on private client sites under various state (WY, CO, UT, NE) and federal regulatory programs.
Travis Brown is a Project Hydrogeologist with Quantum Water & Environment who has spent his career thus far working on groundwater issues ranging from environmental site characterization and cleanup to geothermal exploration and water rights. He earned a Master of Science in Hydrology from the Colorado School of Mines in 2015 and a Bachelor of Arts in Geology from the College of Wooster, Ohio in 2010. He is currently working toward becoming certified as a Professional Geologist in Wyoming. In his spare time, Travis enjoys reading, fly fishing, backpacking, skiing, cooking, and learning to play the banjo.
Ralf Topper is a longtime, over 20 years, member of the Colorado Groundwater Association, and has served in various positions on the board. Ralf is currently a director-at-large and wishes to continue serving the association in that capacity. He recently retired from the Colorado Department of Natural Resources with 16 years of service as the senior hydrogeologist in both the Colorado Division of Water Resources and the Colorado Geological Survey. He has earned advanced degrees in Geology (BS, MS) and Hydrogeology (MS) from CU-Boulder and Colorado School of Mines, and has over 35 years of professional geoscience experience in both the private and public sectors. He is a Certified Professional Geologist, a Geological Society of America Fellow, and an active member of both national and state groundwater societies. Ralf has authored numerous papers and publications on Colorado’s groundwater resources including the award-winning Ground Water Atlas of Colorado.
Kevin Donegan is Senior Hydrogeologist with the Colorado Division of Water Resources. His responsibilities include researching hydrogeologic conditions in aquifers within Colorado, advising the State Engineer of aspects of hydrogeology pertinent to water rights, well permits and nontributary petitions, and acting as staff for the State Board of Examiners of Water Well Construction and Pump Installation Contractors. He has been an active member of CGWA since 2008 including a term as President. Kevin lives in Southwest Denver with his wife and daughter.