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Tree Care Industry Association The Tree Care Industry Association is a 68-year-old public and professional resource on trees and arboriculture representing approximately 2,100 tree service and affiliated company members. This site has free tree care information and a free zip code search of local tree companies for consumers. Our members recognize stringent safety and performance standards for quality and safety. They maintain trained, professional staffs and are dedicated to ethics and quality in business practices. TCIA provides accreditation and certification services for the tree care company and professional arborists. We also provide safety and educational programs, guidelines for tree service operations, ANSI A300 tree pruning standards, and much more. |
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International Society of Arboriculture The International Society of Arboriculture is a worldwide professional organization dedicated to fostering a greater appreciation for trees and to promoting research, technology, and the professional practice of arboriculture. |
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The National Arbor Day Foundation We envision a world where trees and forests are abundant, healthy, and sustainable, and highly valued by all people. We inspire people to plant, nurture, and celebrate trees |
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Pacific Northwest Chapter Welcome to the Pacific Northwest Chapter of the International Society of Arboriculture. The PNW-ISA is a professional affiliation of arborists and urban foresters in the Pacific Northwest. The ISA has more than 14,000 members worldwide. We have lots of information for home gardeners and anyone interested in trees. Want to hire a professional arborist? Our lists of Consulting Arborists and Commercial Arborists are excellent resources to locate arborists in British Columbia, Idaho, Oregon and Washington. |
| Friends of Trees Friends of Trees is a nonprofit organization that depends upon support from businesses, foundations, public agencies and individuals. Members help Friends of Trees build stronger communities and restore the area's urban forest. Friends of Trees inspires community stewardship by bringing people in the Portland-Vancouver area together to plant and care for city trees and urban natural areas. We plant trees along city streets and in urban natural areas. Volunteers are always welcome to help plant trees, work in the office, or organize events. | |
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Utility Arborist Association The Utility Arborist Association is the premier organization for individuals and companies who desire to provide professional utility arboricultural services. UAA is the premier organization for individuals who desire to provide professional utility arboricultural services. Members of the UAA and their employers have a commitment to the public to enhance the practice of arboriculture. |
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American Society of Consulting Arborists The American Society of Consulting Arborists (ASCA) is a non-profit professional society created to develop and preserve the highest standards of performance in the field of arboricultural consulting. ASCA is the only professional or trade organization dedicated solely to the advancement of the arboricultural consulting industry and its members, and is the preeminent authority on the issues and practice of those who are Consulting Arborists. |
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Home Builders Assosiation of Metropolitan Portland |
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Construction Contractors Board The Construction Contractors Board protects the publicÕs interest relating to improvements to real property. The Board regulates construction contractors and promotes a competitive business environment through education, contractor licensing, dispute resolution, and law enforcement. |
