Diagram of Tree Protection Regulations
Find it, Fix it - Service Request Mobile App (you can report tree removals under the 'Other' category)
Green Factor
Green Seattle Partnership
Interim Tree Protection Ordinance
SDOT service numbers:
     To report sidewalks uplifts: (206) 386-1218 (24/7 dispatch line for imminent needs)
     Tree related issues: (206) 684-TREE (7733) (message-only line)
     Street maintenance request form:
Seattle reLeaf Program
Street Tree Manual
Seattle Tree Map
Tree Protection Regulations in Seattle (TIP 242)
Urban Forest Stewardship Plan
University of Washington Brokman Memorial Tree Tour