Tierra specializes in all aspects of biological and ecological consulting, from on-the-ground surveys and complex environmental analyses to report and permit writing. Our environmental specialists are known for creating unique solutions to multifaceted land development, environmental, and community concerns during each step of the planning process.

Environmental Services:

  • National Environmental Policy Act Compliance (Categorical Exclusions, Environmental Assessments, and Environmental Impact Statements)
  • Endangered Species Act Section 7 and Section 10 Compliance
    • Biological Assessments and Evaluations
    • Biological Resource Memorandums
    • Short Form Biological Evaluations
    • Sections 7 and 10 Coordination Letters and Correspondence
    • Section 10 Habitat Conservation Plans
  • U.S. Army Corps of Engineers (USACE) Clean Water Act Section 404, Section 401, and Rivers and Harbor Act Section 10 Compliance and Permitting
    • Jurisdictional Delineations
    • Nationwide Permits
    • Individual Permits
    • USACE Coordination Letters and Correspondence
    • Wetland Determinations and Delineations
  • Surveys for Threatened, Endangered, and Other Special Status Wildlife and Plant Species in the Western U.S.
    • Federally Approved Protocol Surveys for Endangered Species
    • Large-Scale Species Inventories and Assemblages (e.g., Sonoran Desert Tortoise, Southwestern Willow Flycatcher, Spotted Owl)
  • Hazardous Materials Assessment
    • Preliminary Initial Site Assessment (PISA)
    • National Emission Standards for Hazardous Air Pollutants (NESHAP) Survey of Suspect Asbestos-containing Material (ACM) and Lead-based Paint (LBP) Surveys
    • Phase I Environmental Site Assessments (ESA)
    • Agricultural Field Soil Sampling and Analysis Report
  • Preconstruction Sonoran and Mohave Desert Tortoise Awareness Training Workshops
  • Habitat Assessments and Mapping
  • Arizona Protected Native Plant Preservation Plans, Inventories, and Stumpage Fee Assessments
  • Desert, Woodland, and Riparian Vegetation Mapping and Mitigation Plans
  • Noxious Weed and Invasive Species Surveys and Inventories
  • Storm Water Pollution Prevention Plan Preparation and Compliance Monitoring
  • Construction Monitoring
  • Geographic Information System Mapping