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Hayley Siltanen


1800 Broadway, Suite 300, Boulder, CO 80302

Hayley helps clients navigate a broad range of matters involving land and water.

On water matters, Hayley represents clients in all aspects of water supply planning, water rights protection and management, and compliance with laws related to water use. Her clients include agricultural producers and ranchers, large industrial water users, municipal water providers, and private landowners.

On land matters, Hayley assists developers with project development, land use planning, and real estate – including commercial construction and conventional and renewable energy projects.

Hayley grew up in a ranching family and that background drives her to provide efficient service and seek practical solutions for her clients.


Advises clients in matters concerning:

  • Water rights
  • Land use planning
  • Real estate
  • Local government
  • Energy project permitting

Client Results

Water Rights
  • Represent clients in the adjudication of new water rights, changes of water rights, and plans for augmentation, including agribusiness, energy, municipal, and private landowner clients.

  • Regularly work with clients to inventory and secure existing water rights, including against claims of abandonment.
  • Advises property owners and prospective buyers regarding water rights associated with ranch, commercial, industrial, and recreation properties as part of due diligence review.
  • Advises clients in matters related to use of water rights, including easements and water conveyancing and supply agreements.
Real Estate and Land Use
  • Counsels clients on local development code provisions that apply to their properties and represents property owners in connection with development applications.
  • Represented solar energy developers to obtain conditional use permits for utility-scale solar projects.
  • Successfully defended multiple challenges to land use permits for a large athletic club before the Oregon Land Use Board of Appeals and Oregon Court of Appeals.


Speaking Engagements


Bar Admissions

Professional and Civic Affiliations

  • Colorado Bar Association, Water Law Section Member, 2020-present
  • Lawyers for Good Government, Volunteer, 2020-present
  • Food Bank of the Rockies, Volunteer, 2020-present

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