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BOE Board Members 


Mike Sullivan, P.E., Deputy State Engineer
Colorado Division of Water Resources
Centennial Building
1313 Sherman Street, Room 814
Denver, CO 80203


Colorado Department of Health Representative

Robert Hillegas
Colorado Dept of Public Health and Environment
Water Quality Control Division
4300 Cherry Creek Drive South
Denver, CO 80246



Governor Appointed Members

Bruce Hier
Hier Drilling Co. 
PO Box 250
Castle Rock, CO 80104

Term Expires: June 30, 2023

Christopher Sanchez, P.G.  
Principal, Bishop-Brogden Associates, Inc.
333 W Hampden Ave, 1050
Englewood, CO  80110

Term Expires: June 30, 2022

Keith Branstetter 
Aztec Drilling Company
P.O. Box 772771
Steamboat Springs, CO 80477

Term Expires: June 30, 2021

Previous Board Members

Duties of the Board

For Additional Information, Please contact:

Doug Stephenson (
Colorado Division of Water Resources