Mayhan

David is a member of Butler Snow’s Tort, Transportation, & Specialized Litigation Group.

• Commercial Litigation
• Construction Litigation
• Insurance
• Intellectual Property
• Premises Liability
• Tort, Transportation & Specialized Litigation
• Construction & Building Products Litigation
• Aviation

Construction

• David Gregory Mayhan has been practicing law since 1985, having earned his Juris Doctor, with honors, from the University of Iowa School of Law. His practice is concentrated in commercial litigation, construction law, insurance, personal injury and product liability defense.  He previously served as a partner in a Denver boutique litigation firm, and prior to that, was a senior attorney for a Fortune 500 insurance company where his responsibilities included litigation and supervising outside counsel in litigation. He served as a board member of the Colorado Defense Lawyers Association (CDLA) from 2014 to 2016, and chaired the 2016 CDLA Trial Academy.  He carries an AV-Preeminent rating from Martindale-Hubbell and is listed in Colorado’s Super Lawyers and Best Lawyers.
• Achieved defense verdicts in construction, personal injury, and commercial law trials and arbitrations.
• Lead trial counsel in defense verdict for municipality in U.S. District Court trial in Denver in which Plaintiff claimed in excess of $7 million in damages.
• Lead trial counsel in Denver District Court jury trial where contractor client deemed prevailing party in lawsuit by homeowner’s association seeking over $3.5 million in alleged construction defects.
• Prosecuted counterclaims related to construction defects in major utilities installation; hired 90 days before arbitration for large residential real estate development.
• Obtained summary judgment for third-party defendant in large, complex construction defect claims involving approximately $40 million in alleged repair costs and other damages.
• Member of trial team defending products supplier facing over $50 million in claims; obtained favorable verdict after six-week trial in United States District Court, District of Colorado.
• Successful defense of contractor involved in commercial disputes concerning zoning and construction related to commercial warehouse/office building.
• Member of trial team defending former fraternity president in high-profile wrongful death claim arising from hazing incident at the University of Colorado.
• Member of trial team prosecuting breach of contract claim and defense of business tort and Title VII discrimination claims over breach of natural gas supply contract; client obtained a judgment in excess of $700,000 at a jury trial.
• Obtained summary judgment for consumer product manufacturer in alleged electrocution case involving claims of negligence and product liability.
• Member of trial team defending major industrial parts supplier in six-week jury trial addressing alleged violation of Colorado Consumer Protection Act, negligence and product liability claims.
• Represented major local automotive and industrial parts supplier in case alleging copyright, trade secret and unfair competition claims for over $40 million in damages; litigated sanctions against opponent for destruction of evidence during litigation; extensive discovery in Japan.
• Representative Matters
  • Cross Continent Development LLC v. Town of Akron, 2013 WL 6334840 (10th 2013), trial on remand, April 2014 09CV02413 (U.S. District Court, District of Colorado).
  • Lanahan v. Chi Psi Fraternity, 175 P.3d 97 (Colo. 2008)
  • R. Horton, Inc. v. AAA Waterproofing, Inc., No. 06CA1874 (Colo. App. Oct. 9, 2008)
  • Lewis-DeBoer v. Mooney Aircraft Corp., 728 F. Supp. 642 (D. Colo. 1990)
  • Gates Rubber Co. v. Bando Chem. Indus, Inc., 167 F.R.D. 90 (D. Colo. 1996)
  • Gates Rubber Co. v. Bando Chem. Indus., Inc., 855 F. Supp. 330 (D. Colo. 1995)
  • Jarnagin v. Banker’s Life & Cas. Co., 824 P.2d 11 (Colo. App. 1991)

• Martindale-Hubbell®
  • AV®– Preeminent™ Peer Review Rated
• Best Lawyers in America®
  • Lawyer of the Year, Personal Injury Litigation – Defendants (Denver), 2020
  • Construction Law, 2021-2025
  • Mass Tort Litigation / Class Actions – Defendants, 2015-2025
  • Personal Injury Litigation – Defendants, 2020-2025
• Super Lawyers®
  • Colorado Super Lawyers, Personal Injury – Products: Defense, 2008-2021
• Law Week Colorado, Top Litigators 2020

• Colorado, 1985
• Minnesota, 1987 (Inactive)
• U.S. District Courts
  • Colorado: District of Colorado
• U.S. Court of Appeals
  • 10th Circuit

• University of Iowa School of Law, J.D., with honors, 1985
• University of Iowa, B.S., Political Science and Economics, 1982
  • Four-year Letterman, Varsity Football/Starter, 1982 Rose Bowl Team, Big Ten All-Academic Football Team, 1980-1981

• American Bar Association
• Catholic Lawyers Guild of Colorado
• Colorado Bar Association
• Colorado Defense Lawyers Association
• Defense Research Institute (DRI)
• Faculty of Federal Advocates
• Federation of Defense and Corporate Counsel (FDCC)
• Minnesota Bar Association

• Co-Author, "Practice Pointers & Potential Pitfalls of a Corporate Deposition," 2024 Litigation Update: Navigating Emerging Trends and Technology, March 2024.
• Panel Moderator, “Designing and Constructing Denver as a Placemaking Hub,” Bisnow Denver State of the Market, June 26, 2019. 
• Speaker, “Your Guide to Legal Matters,” Business Leaders Podcast, May 25, 2019.
• Co-Author, “Surge in Apartment Construction Fuels Condo Conversions, Liability Concerns in Denver,” Law Week Colorado, Vol. 15, No. 43, October 22, 2018.
• Panelist and Speaker at National Business Institute Seminar, Firearms Law in Colorado – A Guide to Regulatory and Liability Concerns for Buying, Selling or Owning Firearms, Denver and Colorado Springs, CO, December 7, 11, 2017.
• Mayhan, D. and Baumann, S., “Technology in the Courtroom”, Chapter 23 of the Colorado Courtroom Handbook for Civil Trials, Fourth Ed. (Continuing Legal Education in Colo., Inc., for the Colorado and Denver Bar Associations)
• Co-Director, Colorado Defense Lawyer’s Association “Boot Camp” for Young Lawyers, June 23, 2017
• “Come Join the 21st Century: Latest Trial Software Programs”, presented at the Colorado Defense Lawyers Annual Meeting, Santa Fe, NM, July 28, 2017
• Director, Colorado Defense Lawyers Association Annual Trial Academy, April 20-22, 2016, Denver, CO
• “Trial Success Stories: What Does and Does Not Work”, presented at the Colorado Defense Lawyers Annual Meeting, Beaver Creek, CO, August 2, 2013
• Mayhan, D.G., Latest Developments in Construction Defect Litigation – Life After CDARA I and II, Colorado Bar Association 2006 Annual Torts Update Program, Jan. 31, 2007.
• Mayhan, D.G., and Fennelly, P., The Uniform Computer Information Transactions Act: Ready or Not, Hear It Comes, 28 Colo. Law. 63, 1999.
• Mayhan, D.G., A Reasonable Fear, the trial of a political asylum case before the United States Administrative Law Court, 21 Colo. Law. 904, 1992.
• Wells, M.A. and Mayhan, D.G., Federal Preemption of Strict Liability Claims in Aviation Litigation, A Fresh Look, 27 Tort & Ins. L J., 693, 1992.
• Wells, M.A. and Mayhan, D.G., Federal Preemption in the Aircraft Design Case: A Defense Perspective, presented at the October 1991 meeting of the Aviation and Space Law Committee of the ABA Tort and Insurance Practice Section, Washington, DC.
• Author, "Antitrust Standing," 10 J. Corp. Law 463, 1985.
• Journal of Corporation Law, Note and Comment Editor.
• Mayhan, D.G., Note, Antitrust Standing Law Summary, 10 J. Corp. L. 463, 1985.

• Boomer Esiason Cystic Fibrosis Foundation