Sandhill Holdings LLC

Comprehensive site design and infrastructure planning for residential, commercial, and municipal developments across Arizona.

• Site Development

  Comprehensive engineering for subdivisions, master-planned communities, and custom commercial designs.

• Grading, Drainage, and Utility Design

  Expert grading, drainage, stormwater management, hillside, retention basin, and utility design for seamless jurisdictional compliance.

• Transportation Infrastructure

  Roadway layout, transportation infrastructure, and traffic design to connect communities.

• Due Diligence and Planning Support

  Support for rezoning, entitlements, and sustainable land use planning.

and regulatory compliance support tailored to regional and national guidelines.

• Environmental Site Assessments

  Phase I and Phase II Environmental Site Assessments with defensible reporting.

• Biological Site Assessments

  Biological site assessments and protected species surveys, including burrowing owl surveys.

• Remediation and Waste Management

  Remediation planning, hazardous materials handling, and waste management solutions.

• Permitting and Compliance

  Stormwater, air, and water quality permitting, monitoring, reporting, and multi-agency compliance support.

Workplace compliance and risk reduction strategies to safeguard personnel and business operations.

• OSHA Compliance Assessments

  OSHA compliance assessments and workplace safety audits.

• Process Safety Management (PSM)

  PSM program development, implementation, and auditing.

• Risk Management Program (RMP) Support

  Regulatory guidance and RMP support.

• Industrial Hygiene

  Industrial hygiene evaluations, exposure monitoring, and air quality testing.

• Employee Training Programs

  Employee training programs focused on regulatory compliance and workplace safety.

Accurate, compliant surveying services backed by one of Arizona's largest field-crew operations.

• Land Surveying

  Boundary, ALTA, and topographic land surveys satisfying municipal, county, and private developer standards.

• Construction Staking

  Staking and layout services for infrastructure and development projects.

Geotechnical investigation and soil engineering to secure the stability of infrastructure and developments.

• Site Investigations

  Site investigations, boring, and soil/rock analysis.

• Foundation and Pavement Design

  Foundation selection and pavement structural design.

• Slope Stability and Erosion Control

  Engineering solutions for stable slopes and active erosion control.

Quality assurance and structural verification through accredited testing laboratories and field inspections.

• Materials Testing

  AASHTO-, ADOT-, and USACE-accredited laboratory testing of construction materials.

• Special Inspections

  Structural and vertical inspections conducted by certified field technicians and reviewed by registered engineers.