Mar 25

Gilcrest/LaSalle Pilot Project Hydrogeologic Characterization

Gilcrest/LaSalle Pilot Project Hydrogeologic Characterization,

AWRA Colorado Section, March 31, 2014

Andy Horn, Westwater Hydrology LLC

Peter Barkmann, Colorado Geological Survey


Landowners and municipalities in the Gilcrest/LaSalle area have reported high groundwater conditions and resulting property damage. In response, the Colorado Water Conservation Board (CWCB) funded the Division of Water Resources (DWR) to conduct an independent pilot study to identify relationships between the climate, geology, hydrology, and water management practices and groundwater levels in the area. As part of the study the Colorado Geological Survey (CGS) completed a detailed assessment of the pilot study area geology and historic water level conditions.  The CGS acquired existing groundwater level data, identified groundwater level data gaps, compiled geologic and aquifer property data, and characterized the alluvial aquifer hydrogeology. New findings include refined alluvial aquifer and bedrock surface mapping and revised surface geologic mapping. Additionally, the CGS refined the aquifer lithologic and depositional conceptual model, providing insights into near-surface layers impeding downward groundwater flow.  The outcome presents a holistic, three-dimensional view of the aquifer providing a sound conceptual model foundation as the pilot study moves forward.


Speaker Bio

Andy Horn develops, designs, and implements scientifically valid and legally defensible water resource and environmental investigations for private, industrial, and governmental clients.



Denver Water – Board Room
Brown Bag Lunch and Networking at 12:00, Program at 12:30
Visit Denver Water’s website for directions to their main office

(the building outlined in red with the blue Denver Water symbol).



We will not be ordering lunch for this event. Please feel free to “brown-bag-it” 


 Please RSVP

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