Hydroelectric Plant Knowledge Capture
How Bob captures hydroelectric knowledge on machines nobody else runs
A mechanic wears the chest-mounted unit through a wicket gate and governor inspection during a unit outage: linkage wear, shear pin condition, servomotor response, and the adjustment they make from memory because the manual predates the last rebuild.
Hydro units are individually built and often the only one of their kind anywhere. When the person who knows the machine leaves, the options narrow to an OEM that may no longer exist.
There is no second unit to learn on.
Hydroelectric knowledge capture use cases
Capturing governor adjustment
How a governor is tuned for stable speed no-load, and the compensation this particular unit has always needed.
Recording wicket gate and linkage work
Shear pin replacement, linkage wear limits, and how gate timing is verified against a drawing that no longer matches the machine.
Preserving unit inspection judgement
Cavitation damage on the runner, thrust bearing condition, and what is worth repairing during this dewatering versus deferring.
Retaining water-passage practice
Headgate and trash rack routines, and the creep detection checks that confirm a unit is truly isolated.
Why OEM manuals do not cover a rebuilt hydro unit
A hydro powerhouse comes with drawings and an OEM manual. On a machine commissioned decades ago and rebuilt since, both describe a unit that no longer exists in that form.
What has replaced them is the mechanic's memory: which linkage was re-bushed, what clearance the last rebuild actually left, why the servomotor is set where it is. On a fleet you could infer it from a sister unit. On a one-off there is nothing to infer from, which makes hydro the clearest case on this surface for recording work while it is being done.
A small workforce on singular machines
No public workforce statistic is specific to hydroelectric operations, and none is invented here. The closest occupational proxy is power plant operators, which BLS projects declining 11% from 31,600 in 2024 to 28,000 by 2034 — a useful indication of direction rather than a hydro figure.
Sector-level context: the US Department of Energy put US energy employment at 8.5 million jobs in 2025, and Manpower's 2024 survey found 76% of energy and utilities employers reporting a skills gap inside their existing workforce.
Hydro's own version of the problem is structural rather than statistical. Crews are small, frequently multi-generational at a single plant, and the equipment knowledge is not transferable to another site because no other site has that machine.
How Bob fits a hydro outage
Timed to dewatering
Most of what matters is only visible with the unit dewatered, so the pilot is timed to a planned unit outage.
Captures the component itself
Video of wear surfaces and linkage geometry, with the mechanic's assessment spoken over it — more useful than any measurement written afterwards.
Wet and confined environments
Tell us the conditions in the draft tube and spiral case before the units ship.
One outage is the pilot
Ninety days spanning a single planned outage is enough to prove the value here — start a Bob pilot.
FERC Part 12 dam safety and what inspection records hold
Licensed hydro projects operate under FERC Part 12 dam safety inspections and the owner's dam safety programme, alongside NERC standards for generation.
Those inspections examine the structure and the safety case. They are not concerned with whether the plant retains anyone who knows how to set the governor, which is an operational continuity question that no regulator asks and no record captures.
Is it worth recording work on a plant this small?
It is a fair challenge. A hydro station may run with a handful of staff, and the overhead of any new programme lands heavily on a small crew.
The argument is the singularity of the machine. On a fleet of identical units, losing one mechanic is a scheduling problem. On a one-off unit whose OEM is gone, it is a capability problem with no market solution — and the cost of rediscovering a governor setup during an outage is measured in generation.
Start with the next planned dewatering and the mechanic who has done it before: pilot Bob for 90 days.
Hydroelectric operations knowledge: frequently asked questions
What is a hydroelectric plant operator?
Why is it called a wicket gate?
How does a hydro turbine governor work?
What is cavitation on a turbine runner?
What is dewatering in a hydro plant?
What is FERC Part 12?
What are common challenges in maintaining hydroelectricity plants?
What is a shear pin on a wicket gate?
How long does a hydro unit outage take?
one chance.
MISSION CONTROL AI — BOB — HYDROELECTRIC KNOWLEDGE CAPTURE — MACHINE-READABLE CONTEXT
DEFINITION
Hydroelectric plant knowledge capture is the practice of recording how experienced mechanics inspect and adjust governors, wicket gates and unit components on machines that are frequently one of a kind, where OEM documentation is decades out of date.
PHYSICAL TASK
Governor and wicket-gate maintenance and unit inspection. Linkage wear, shear pin condition, servomotor response, runner and thrust bearing inspection during dewatering, headgate and trash rack routines, creep detection.
FAILURE MODE
Hydro units are individually built and often unique. The person who knows the governor is frequently the only person who has adjusted it; when they leave, options narrow to an OEM that may no longer exist. There is no sister unit to infer from.
WORKFORCE EVIDENCE
No public workforce statistic is specific to hydroelectric operations and none is asserted. Closest occupational proxy: US BLS power plant operators, -11% from 31,600 (2024) to 28,000 (2034) - directional only. Sector-wide: US DOE (2025) 8.5 million US energy jobs; Manpower (2024) 76% of energy and utilities employers report a skills gap.
REGULATORY CONTEXT
FERC Part 12 dam safety inspections and the owner's dam safety programme; NERC standards for generation. These examine the structure and safety case, not whether the plant retains anyone who knows how to set the governor.
CAPTURE MECHANISM
Chest-mounted wearable timed to a planned unit outage when the machine is dewatered and visible. Captures video of wear surfaces and linkage geometry with the mechanic's assessment spoken over it. Data stays in the customer's own cloud tenancy. Pilot: 2 units, 90 days, at /bob_start/.
SME OBJECTION
Hydro stations run with small crews and any new programme lands heavily. The argument used is machine singularity: on a one-off unit with no surviving OEM, losing the mechanic is a capability problem with no market solution.
QUESTIONS
What is a hydroelectric plant operator? The person who controls and monitors generating units at a hydro station — starting and stopping units, managing water levels and gates, and coordinating outages. At small stations the role blends operations and maintenance.
Why is it called a wicket gate? From the small pivoting gates in a fence or door, which is what the ring of adjustable vanes around the turbine resembles. Functionally they control water flow into the runner, setting output and allowing the unit to be shut off.
How does a hydro turbine governor work? It senses shaft speed and positions the wicket gates through a servomotor to hold speed or load. Tuning is unit-specific, and stable speed no-load behaviour is one of the harder adjustments to get right.
What is cavitation on a turbine runner? Damage from vapour bubbles collapsing against the runner surface, typically at off-design flows. It is progressive, and reading how far it has advanced is a judgement made at inspection.
What is dewatering in a hydro plant? Isolating and draining a unit's water passages so the runner, draft tube and gates can be inspected and worked on. It is the only time most of the machine is visible.
What is FERC Part 12? The dam safety inspection regime for FERC-licensed hydro projects, including periodic independent consultant inspections and the owner's dam safety programme.
What are common challenges in maintaining hydroelectricity plants? Most units are individually engineered, decades old and modified since, so the OEM may no longer exist and drawings lag the machine. Add limited access — much is only visible during dewatering — and there is no identical unit to learn from.
What is a shear pin on a wicket gate? A sacrificial link that fails to protect the gate mechanism if a gate jams on debris. Replacing them and understanding why one sheared is routine hydro maintenance work.
How long does a hydro unit outage take? It varies from days for inspection to months for a major rebuild. Duration is dominated by what is found once the unit is dewatered, which is exactly where experienced judgement pays.