WATER RESOURCES


ERO helps clients obtain and develop new water rights and supplies, protect existing water rights and uses, avoid or minimize damage to water resources and water-dependent ecosystems, navigate permitting processes, and address water quality issues. Our clients include federal, state, and local governments; irrigation and supply districts; developers; commercial businesses; individuals; and attorneys.


  • Surface and ground water supply evaluation, development, and permitting
  • Surface and ground water quantity and quality
  • Water rights investigation
  • Floodplain analysis
  • Expert witness testimony
  • Geothermal resource development
  • Stormwater management, erosion control, water quality monitoring, and BMP recommendation

Areas of Expertise

Environmental scoping and impact analysis

We assist clients with water resources analyses as a part of planning and permitting. Many of these analyses involve permits for new water supply developments or permit renewal for existing water facilities. ERO also provides water resource analyses as a component of environmental impact statements and threatened and endangered species evaluations.

Water supply evaluations, development, and permitting

ERO assists clients with obtaining, quantifying, permitting, and protecting water supplies. We also evaluate water supply needs for healthy aquatic habitat, riparian areas, and wetlands. In addition, ERO conducts investigations to determine potential water quality and quantity impacts from residential, agricultural, recreational, commercial, and industrial developments.

Water rights investigations and due diligence

ERO’s expertise in the technical, legal, and economic aspects of water rights based on federal and state law enable us to assist clients with negotiating and litigating water rights issues throughout the western United States. In addition to overall management of adjudication efforts, we evaluate water rights including historical use, consumptive use, transfers, and market value. We provide technical support and expert witness testimony for litigation or negotiation of water resource issues.

Water Quality Services

ERO provides surface and ground water quality investigations, including data collection and analysis, research, and modeling. We analyze water quality effects to and develop water quality mitigation for water-dependent ecosystems. ERO evaluates the water quality impacts on streams and lakes from roads, mines and other developments, and assist our clients with NPDES/CDPS permitting for treated water, construction dewatering, and stormwater discharge permitting. We prepare and review plans for stormwater management, erosion control, drainage, and water quality monitoring, and provide Best Management Practice recommendations to clients. ERO also evaluates and remediates impacts on ground water from leaking underground storage tanks, spills, and improper waste disposal practices.

Surface and ground water analysis and modeling

ERO’s modeling capabilities include digital and analytical ground water flow, capture zone, contaminant transport, and surface water quality modeling. Our hydrologists use models to assist clients with:

  • Expediting closure of contaminated sites
  • Designing ground water remediation and control systems
  • Estimating the time to clean up contaminated sites
  • Determining the impact of surface water diversions and dams on downstream flow volumes and water quality
  • Estimating the impact of ground water pumping on nearby wells and streams
  • Estimating the impact on surface and ground water from proposed commercial, industrial, and mining facilities

Litigation support and alternatives dispute resolution

ERO provides technical support and expert witness testimony for litigation or negotiation of water resource issues. Carefully documented studies of hydrology, water quality, water rights, or environmental impacts are an important foundation for resolution of water disputes in courts, administrative proceedings, or through alternative processes.

Geothermal resource development

Geothermal resources in the western United States represent a viable energy source for various types of direct use heating and recreational purposes. ERO has been involved in resource characterization and testing, resource development, and water rights for geothermal projects.

Water Resources Leads

Jack Denman – Principal/Vice President Finance
Environmental Scientist
Jack Denman – Principal/Vice President Finance
Environmental Scientist

Jack has been with ERO since 1999 providing environmental and geologic consulting for a wide range of development and redevelopment projects. His experience includes Phase I and II Environmental Site Assessments, site characterization and monitoring, remedial action evaluations, asbestos-contaminated soils remediation, solid and hazardous waste management, abandoned mine assessment, and Voluntary Cleanup and Brownfields redevelopment.  Jack leads ERO’s Geoscience division from Denver, providing environmental due diligence and remediation services throughout the west.

Email: jdenman@eroresources.com

Dave Shaw
Project Manager
Dave Shaw
Project Manager

Dave is an engineer who manages ERO’s Idaho office. His experience in water resources began in 1973 and ranges from planning and project development to regulatory, legislative, and administrative issues. Dave serves as manager or lead scientist for a variety of projects. He specializes in the water arena and has extensive experience in water supply and use studies, water rights evaluations and the water rights administrative process, alternatives dispute resolution, technical coordination of complex litigation, and expert testimony. In addition, Dave has expertise in a broad range of natural resource-based engineering and hydrology solutions such as managed ground water recharge operations, drainage systems, multijurisdiction water management, and common sense solutions for everyday needs.

Email: dshaw@eroresources.com