Navigate Washington's environmental regulations with confidence. Professional wetland delineations, critical area assessments, endangered species surveys, and SEPA compliance for your land project.
Request Environmental StudyWashington's Growth Management Act and local critical area ordinances require environmental review before most development. Counties and permitting agencies need to know if your property contains wetlands, endangered species habitat, steep slopes, or other sensitive features that could limit or prohibit development.
TerraVector coordinates qualified biologists, wetland specialists, and environmental consultants to complete the studies your project needs — from simple wetland delineations to full Environmental Impact Statements (EIS). We ensure compliance with SEPA, ESA, and local critical area codes so your permits move forward.
Review wetland maps, soil surveys, species databases, and aerial imagery to identify potential issues.
Biologist visits site to delineate wetlands, survey habitat, and assess critical areas.
Document findings with maps, photos, and species lists. Flag wetlands per Corps of Engineers methodology.
Assess how your project affects wetlands, buffers, habitat, or protected species.
Design measures to avoid, minimize, or compensate for environmental impacts (if required).
Submit to county, Corps of Engineers, or Washington Dept of Fish & Wildlife for approval.
Simple wetland delineations cost $3K–$6K. Critical area reports with multiple assessments run $6K–$12K. Full biological assessments for endangered species or complex projects can reach $12K–$15K+. Costs depend on property size, habitat complexity, and agency requirements.
A wetland delineation identifies and maps wetland boundaries on your property using soil, hydrology, and vegetation criteria. Required before building within 200 feet of suspected wetlands or filling/grading near water features. Most Washington counties require delineation for development permits.
Spring through early summer (April–July) is ideal for wetland delineations and habitat surveys when vegetation is identifiable and species are active. Winter studies are possible but may be less conclusive. Some surveys (like breeding bird surveys) must occur during specific months.
Critical areas include: wetlands and their buffers, fish and wildlife habitat conservation areas, frequently flooded areas, geologically hazardous areas (steep slopes, landslides), and aquifer recharge areas. Counties regulate development in critical areas through special ordinances.
SEPA (State Environmental Policy Act) applies to Washington state and local government decisions. NEPA (National Environmental Policy Act) applies to federal permits like Corps of Engineers wetland fills. Some projects require both — we'll identify which reviews your project needs.
Generally no, but it depends on buffer width, wetland category, and project design. Washington counties typically impose 25–200 foot buffers around wetlands where development is restricted. Buffer averaging or mitigation may allow some impacts with special permits.
Depends on location. Common concerns include: bull trout, salmon, bald eagles, spotted owls, sage grouse, pygmy rabbits, and various plants. If your project area has documented sightings or suitable habitat, you may need species-specific surveys and consultation with USFWS.
We coordinate habitat and environmental studies across central and eastern Washington: Grant, Adams, Douglas, Lincoln, Franklin, Okanogan, Spokane, Kittitas, and Chelan counties.
Tell us about your property and project. We'll match you with qualified environmental consultants and biologists.
Request Environmental Study