• vcard
  • Education
    • J.D., cum laude, Harvard Law School, 1990, Editor for Environmental Law Review
    • B.A., summa cum laude, University of Vermont, 1985, Political Science, Environmental Science; Phi Beta Kappa
  • Court Admissions
    • State of Colorado, 1990
    • U.S. Court of Appeals, Ninth Circuit
    • U.S. Court of Appeals, Tenth Circuit
    • U.S. Court of Appeals, Eleventh Circuit
    • U.S. District Court, District of Colorado
    • U.S. District Court, Middle District of Florida
    • U.S. District Court, Eastern District of Washington
    • U.S. District Court, Northern District of Oklahoma
    • U.S. District Court, Southern District of Ohio
    • U.S. District Court, Northern District of Ohio
Colin Deihl manages complex business disputes at all stages of litigation, including jury and bench trials, class actions, arbitrations, and settlements. He is a strategic trial lawyer with more than 25 years of experience, and focuses on complex—and often technical— business disputes, including environmental and real estate matters. Colin also assists clients with sensitive internal investigations and compliance counseling. 

Colin's representative litigation experience includes claims for breach of contract, fraud, breach of representations and warranties, and violation of federal environmental statutes like the Clean Air Act and CERCLA. 

In regards to real estate clients, he has handled a wide variety of disputes, including conflicts over land-use, development, and disputes between surface and mineral owners. Many of Colin's cases involve coordination between litigation strategy, public relations, and governmental relations. In that context, Colin has appeared before, or coordinated with, government entities from local city councils to federal agencies.
  • Lead counsel for professional sport organization in putative nationwide class action alleging consumer fraud and breach of contract claims against both the sport organization and its 92 member board of directors.
  • Represent theme park and entertainment company in two putative consumer class actions involving automatic renewal of annual passes. One case is pending in California state court and the other case is pending in federal court in Florida.
  • Defended professional baseball club against putative class action brought under consumer protection act concerning resale of tickets to baseball games.
  • Defended hazardous waste incinerator against citizen suit claim for violation of Clean Air Act permit in federal court in Ohio. Case involved complex technical interpretation of Title V permit and continuous emission monitoring requirements.
  • Trial counsel for construction company resulting in $23 million jury verdict in favor of client involving breach of contract and fraud claims in runway paving contract.
  • Defended large public utility in multiple lawsuits brought under the Clean Air Act alleging violations at the Cherokee Station power plant in Denver and the Comanche 3 power plant in Pueblo.