Roadside Maintenance Contracts Require CLTs and Arborists CLT Certification is now required for all Hawaii DOT roadside landscape maintenance contracts. All private contractors must show proof of certified employees before signing new roadside mowing & irrigation maintenance contracts. At least one supervisor must be certified in good standing as a CLT/Maintenance and one with the CLT/Irrigation and must be on the work site at all times during operation. Both of these certifications may be held by the same person serving in the respective positions. All tree work above 10 feet also requires certified workers. This requirement calls for an ISA Certified Arborist with at least six years of experience to supervise and be on site at all times during tree work above 10 feet. All work in the tree must be done by Certified Tree Workers with at least three years experience with local tree species. CLT Training and Certification Starts Soon The 2011 CLT season begins with the Kauai training classes in May and June. All those interested should... ...
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