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Heritage Hydro Governor Service, Inc.
Consistently delivering exceptional service of Legacy Hydro Governors and equipment

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Your Trusted Partner for Legacy Hydroelectric Governor Systems 

At Heritage Hydro Governor Service, Inc. (HHGS), we take pride in delivering specialized mechanical and hydraulic services with an unmatched level of expertise and reliability. We are a SBA-Certified Women-Owned Small Business (WOSB) with more than 30 years of field experience and a deep specialization in Woodward mechanical governors, hydraulic pumps, and pressure systems.

Who We Serve 

We provide on-site and in-shop service to:

  • Public and Private Utilities
  • Federal and State Government Agencies
  • Engineering Firms & Contractors
  • Cooperatives, Cities, Counties, and Townships

From local municipal hydroelectric operations to large federal infrastructure, our team ensures peak performance and regulatory compliance.

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Our Core Services

Specializing in Woodward Equipment:

Gateshaft Governors and Actuators

20 Series Rotary Gear Pumps

 “XX” Herringbone Pumps

PMGs and Speed Switches

Whether you’re planning a preventive maintenance program or need immediate help with a critical system issue, the team at Heritage Hydro Governor Service, Inc. is ready to support you.

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What We Offer:

  • Field Services
    Inspection, diagnostics, calibration, tuning, repair, and overhaul.
  • In-Shop Repairs
    Full-service restoration of pumps, motors, and components.
  • Preventive Maintenance
    Reduce downtime and extend equipment life with scheduled service plans.
  • Emergency Response
    Fast turnaround on critical repairs to minimize outages.
  • Training and Support
    On-site training and free phone consultations.

Proven Performance

We’ve completed dozens of successful projects across the U.S., always on time and within budget. Clients consistently praise our deep knowledge, responsive service, and reliable results.


A few highlights:

Hydraulic oil level

Grand Coulee Dam (WA)

Re-manufactured a 40 HP Woodward XX Gear Pump (2023)

Hydraulic oil level

Salina Pumped Storage (OK)

Refurbished PMGs and speed switches under tight deadlines (2025)

Hydraulic oil level

Packwood Dam (WA)

Rebuilt, rewound and tested spare XX pump motor to OEM specs (2022)

Hydraulic oil level

Canyon Ferry Dam (MT)

Overhauled 6 gear pumps across multi-year project (2022–2025)

Hydraulic oil level

Victoria Hydro (MI)

Major actuator & speed switch overhaul with perfect results (2020)

View our full performance record or contact us for project-specific references.

Certifications & Credentials

Busines Heritage Hydro Governor Service, Inc.

SBA-Certified WOSB & EDWOSB

Hydro Governor Service

Journeyman Millwright Certified – State of Wisconsin

Hydroelectric governor equipment inspection and maintenance service

CPR, AED & First Aid Trained

Hydro Governor Services

Supporter – National Hydropower Association

Hydroelectric power generation

ISNetworld® Authorized Member Contractor

Hydroelectric power generation and transmission equipment maintenance services

OSHA 10-hr & 30-hr Certified

Hydro Governor Service, Inc.

Member – Midwest Hydro Users Group

Frequently Asked Questions

What is a hydroelectric governor, and what does it do?
A hydroelectric governor regulates turbine speed and helps control water flow to maintain stable operation as electrical loads change. Proper governor performance is essential for reliable, efficient hydroelectric power generation.
Heritage Hydro Governor Service specializes in legacy Woodward mechanical hydro governors, including Gateshaft Governors, actuators, 20 Series Rotary Gear Pumps, XX Herringbone Gear Pumps, Permanent Magnet Generators (PMGs), speed switches, and related hydraulic equipment.
Common warning signs include inconsistent turbine speed, unstable operation, hydraulic oil leaks, unusual pump noise, pressure issues, slow actuator response, or recurring control problems. An inspection can help identify the cause and determine the appropriate service.
Service intervals depend on equipment age, operating conditions, manufacturer recommendations, and maintenance history. Heritage Hydro Governor Service can help establish a preventive maintenance schedule tailored to your facility and equipment.
Yes. Heritage Hydro Governor Service provides nationwide field service for hydroelectric facilities, including inspections, troubleshooting, calibration, tuning, repairs, overhauls, and emergency response.
Many inspections, diagnostics, adjustments, and governor repairs can be completed on-site. More extensive component restoration, pump overhauls, motor rewinding, and certain auxiliary equipment repairs may be handled in the company’s fully equipped repair shop. The best approach depends on the equipment and the extent of the work required.
Yes. Heritage Hydro Governor Service specializes in legacy Woodward equipment and helps hydroelectric facilities maintain older systems. The team uses OEM and equivalent components where appropriate, along with restoration and custom machining capabilities to support hard-to-maintain equipment.
Yes. Services include overhauls of Woodward XX Herringbone Gear Pumps and 20 Series Rotary Gear Pumps, actuator service, motor repair and rewinding, PMG and speed switch rebuilding, and restoration of hydraulic auxiliaries.

Yes. Heritage Hydro Governor Service provides emergency response for critical equipment failures and hydroelectric plant outages. Technicians can perform on-site diagnostics and repairs or coordinate component repairs to help minimize downtime.

Turnaround time depends on the equipment type, extent of wear or damage, parts availability, and whether the work can be completed on-site or requires shop service. Contact Heritage Hydro Governor Service with your equipment details and outage schedule for a project-specific estimate.
Yes. Heritage Hydro Governor Service can coordinate inspections, maintenance, and equipment overhauls around planned outages. Preventive maintenance planning helps identify potential issues, manage repair needs, and reduce the risk of unexpected downtime.
Yes. On-site training is available for plant operators, maintenance personnel, and new team members who work with Woodward mechanical governors. Training can include equipment operation, troubleshooting, diagnostics, tuning, and maintenance practices.
Providing the governor or pump model, manufacturer information, equipment age, symptoms, maintenance history, photographs, and the type of service needed can help the team evaluate your request. Include your facility location and any upcoming outage dates to help with service planning.
The decision depends on the equipment’s condition, the availability of parts, repair costs, operational requirements, and expected service life. Heritage Hydro Governor Service can inspect the equipment and discuss restoration options to help you make an informed maintenance decision.
Testing depends on the component and scope of work. Services include testing Permanent Magnet Generators and hydraulic pumps, along with inspection and verification as part of repair and overhaul work. The goal is to confirm proper equipment operation before it returns to service.

Why
Choose
HHGS?

  • Deep Specialization
    30+ years of legacy hydro experience
  • OEM & Equivalent Parts
    Access to rare and discontinued parts
  • Nationwide Service 
    Coast-to-coast project delivery
  • Personalized Support
    Family-owned care with large-scale capabilities
  • Certified Safety & Quality 
    Industry-trusted and audit-ready

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Ready to schedule service, request a quote, or speak to a legacy hydro expert?