Hoyle Tanner & Associates, Inc.

Trusted Experts | Innovative Results

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About the firm

Hoyle Tanner is a New England-headquartered multi-discipline civil engineering firm founded in 1973 that has completed nearly 13,000 projects for municipal, state, federal, and private clients. It provides planning and engineering services across aviation, bridges, roadways, drinking water, wastewater, stormwater, civil site development, and traffic. With seven offices spanning New Hampshire, Massachusetts, Vermont, Maine, and Florida, Hoyle Tanner operates as an extension of its clients' staff, emphasizing listening, flexibility, and grant assistance alongside technical delivery.

Established
1973
Team
Midsize
Firm type
Aviation Engineering · Civil Engineering · Structural Engineering · Transportation Engineering · Water / Wastewater Engineering

Capabilities

Planning and engineering for airport clients, addressing safety and security requirements, design challenges, funding procedures, and time-sensitive needs.

Full-lifecycle bridge services: regulations, budgeting, safety inspections, design, construction, and ongoing maintenance for new and rehabilitated bridge projects.

  • Bridge design (new and replacement)
  • Bridge rehabilitation
  • Safety inspections
  • Historic bridge preservation
  • Right-of-way planning

Civil Site Development

Service website

Site engineering for municipalities, private developers, colleges and universities, resorts and hotels, solar energy investors, and other clients.

Full-service roadway design from initial concept through conception completion, serving as an extension of the client's staff across the entire project lifecycle.

  • Roadway design and reconstruction
  • Active transportation and trail design

Drinking Water

Service website

Water quality planning, hydraulic assessment, and design initiatives to meet the complex regulations of the drinking water industry.

Wastewater

Service website

Collection system, pump station, and treatment facility expansions and rehabilitations for wastewater collection and treatment projects.

Stormwater

Service website

Professional stormwater management services for public and private clients to meet stormwater management objectives and regulatory requirements.

Traffic Engineering

Service website

Analysis and design for safe pedestrian and vehicle circulation while meeting environmental and accessibility concerns.

Asset Management

Service website

Funding assistance, asset inventory, and risk assessment to help communities and agencies develop future capital planning strategies.

Construction Services

Service website

Construction project administration, field observation, and technical services delivered by safety-certified construction professionals.

Complementary Services

Service website

Supporting services including environmental permitting, grant assistance, drone/SUAS data collection, parking facility engineering, and public outreach.

  • Environmental permitting
  • Grant assistance
  • Drone/SUAS data collection and inspection
  • Parking facility structural engineering
  • Public outreach and community engagement

Industries

Airports · Aviation · Government · Federal · Utilities · Water Supply · Education · Land Development · Solar · Hospitality · Historic Preservation

Projects

Maplewood Avenue Bridge Rehabilitation

Portsmouth, NH · Historic Structures · 2026

Project details

Rehabilitation of a historic bridge in Portsmouth, NH. Earned a Silver Award in the ACEC NH Engineering Excellence Awards 2026.

Hoyle Tanner & Associates, Inc. - Engineering Firms