COUNTRY SOURCES / US
United States: drone inspection sources
English-language WebSearch on drone/UAS inspection by asset (bridges, power lines, railways, dams, penstocks, sewers, refineries/tanks, wind, solar, telecom towers, building facades) and regulation (FAA BVLOS waivers, Part 108, NYC rules, Florida procurement ban). Preferred FHWA/USDOT, state DOTs, federal agencies (Reclamation, DOE/Sandia), ASCE, universities, and trade press (T&D World, POWER, Chemical Processing, RCR Wireless). Vendor/press-release items limited to about one-third. Pages were opened with WebFetch where possible; the shared search and fetch budgets ran out mid-task, so three items rely on search-result data only and the planned nuclear, mining, port, tunnel and pipeline searches could not be run.
Full text read: 25 · Abstract read: 2 · Search snippet only: 3
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news · 2016-03-28
UAV: State DOTs employing drones to improve safety, collect data, slash costs
Reports an AASHTO survey of state DOT drone activity. Many DOTs were already testing or studying UAVs, and Michigan DOT estimated a large cost drop for a standard bridge deck inspection. Useful as a snapshot of early US adoption.
- 33 state DOTs had explored, tested or used UAVs (17 studied/used, 16 exploring)
- Michigan DOT estimate: traditional deck inspection ~8 h, 4 crew, ~$4,600 vs. UAV ~2 people, 2 h, ~$250
- MnDOT demonstration used one UAV to inspect four bridges
⚠ The $250 vs $4,600 figure is an MDOT estimate, not a measured program result / 2016 data; adoption has changed since
Why selected: AASHTO (national association of state DOTs) survey, republished by trade press (Roads & Bridges, Equipment World, Mass Transit)
case_study · 2023-03-31
South Carolina DOT drone bridge inspection benefit summary
US DOT's ITS benefits database summarizes a SCDOT/Clemson study comparing conventional and drone inspection of a 0.3-mile concrete bridge. It reports a modest cost saving and high coverage with a zoom camera, while noting drones cannot replace hands-on inspection.
- Conventional inspection estimated at $5,242; drone use saved about $1,500 (reported as 27.5%)
- Drone with 30x zoom observed 91% of inspection points
- Under-bridge truck still needed, but for less time; underlying report dated 2019-12-01
⚠ Drones cannot replace tactile hands-on inspection / GPS signal loss under the bridge was a problem / Best suited to off-year and quick checks; the summary page's percentage does not exactly match $1,500/$5,242 (~28.6%)
Why selected: Official US DOT evaluation database; state DOT-funded university research
technical_report · 2021-05-01
MnDOT Metro District UAS bridge inspection implementation (MN 2021-13)
Final report of MnDOT's implementation phase after research since 2015. The Metro District bought a collision-tolerant drone for confined spaces such as box girders and culverts, and the project produced a bridge-selection plan and a UAS safety and operations manual.
- Report MN 2021-13, authors Jennifer Wells and Barritt Lovelace (Collins Engineers)
- Phase III (from summer 2017) used senseFly Albris and Flyability Elios; Metro District then purchased an Elios
- Deliverables: inspection plan identifying suitable bridges and a UAS Safety and Operation Manual
⚠ Only the catalog abstract was read; quantitative results are in the ~19.6 MB PDF and were not checked
Why selected: State DOT research report archived by the US National Transportation Library; MnDOT is widely cited as a US pioneer
regulation · 2025-08-07
FAA proposes comprehensive BVLOS UAS regulatory framework (Part 108)
Law-firm briefing on the FAA's proposed Part 108 BVLOS rule. It sets a two-tier system of operating permits for lower-risk work and operating certificates for higher-risk work, and lists infrastructure inspection among target uses—relevant to replacing case-by-case waivers.
- Operating permit (lower risk) vs. operating certificate (higher risk; requires SMS, training program, validation testing)
- Operations generally below 400 ft AGL
- 60-day comment period closing 2025-10-04; Executive Order 14307 called for a final rule by 2026-04-02
⚠ Proposed rule only, not final at time of writing / Secondary legal analysis, not the Federal Register text itself
Why selected: Major international law firm analysis of the central US rulemaking for BVLOS inspection; high in search results for Part 108
news · 2022-08-01
Soaring Eagle Technologies Wins FAA Approvals for Line Inspections
T&D trade-press report on a drone service firm receiving an FAA BVLOS waiver for transmission line inspection, relying on an onboard detect-and-avoid system. Distance, daily coverage and savings versus crewed aircraft are company claims.
- Waiver covers up to 27 linear miles (described as the longest FAA approval of its type)
- More than 60 BVLOS missions completed under SGI waivers
- Up to 100 miles of line per day per aircraft and >50% savings vs. manned aircraft (company claims)
- Detect-and-avoid by Iris Automation Casia
⚠ Savings and capacity figures are vendor claims / No utility customer or site named
Why selected: T&D World is a leading US power transmission/distribution trade publication
news · 2021-07-01
FAA Issues First National Approval for Remote, Dock-Based Drone Operations to BNSF Railway
Reports the FAA's first nationwide waiver letting BNSF fly dock-based drones remotely with no on-site pilot. Planned uses include yard security, emergency response and scheduled infrastructure inspection, under altitude and airport-distance limits.
- Max altitude 100 ft; only sites ≥3 nautical miles from airports
- Valid two years, to 2023-06-29; detect-and-avoid required for BVLOS
- Aircraft: Skydio drones with docks
- BNSF program started 2014; ~28,000 BVLOS mission miles flown
⚠ Waiver-based, time-limited approval / Inspection was a planned use, not reported results
Why selected: Widely covered regulatory first for US railways; BNSF is a major Class I railroad
news · 2020-09-24
NYC to Explore Using Drones for Facade Inspections: City Council Orders DOB Study
Reports that the NYC Council passed a bill ordering the Department of Buildings to study drone use for Local Law 11 facade inspections. Drones were then illegal to fly in the city, so any use depended on new regulations.
- Bill passed 2020-09-16; study due by 2021-10-31
- Local Law 11 requires inspection of buildings over six stories every five years
- Drones described as illegal in NYC at the time
⚠ A study mandate, not authorization / Use depends on separate city rules legalizing drone flights
Why selected: New York co-op/condo trade publication; ties to a city law affecting thousands of buildings
technical_report · 2020-06-22
UAS Demonstration and Development for Inaccessible Features Inspections (Reclamation project 20096)
Research project page from the federal dam and water agency. It targets drone inspection of penstocks, surge tanks, gates and other hard-to-reach features at Reclamation powerplants, aiming to reduce confined-space entry and build 3D models for defect monitoring.
- Funded FY2020–FY2022; PI Carter Gulsvig
- Targets penstocks, pipelines, surge tanks and gates
- Builds on USACE / University of Pennsylvania GRASP Lab autonomous tunnel-inspection work
⚠ Project description only; no results reported on the page / Published date is the page's last-update date
Why selected: Official federal agency (dam owner/operator) research program
news · 2018-09-13
In an Industry First, Xcel Energy Flies a Drone BVLOS
Power-industry magazine report on Xcel Energy's first BVLOS drone flight by a US utility for ongoing inspections, near a Colorado generating station, to assess lines and towers along a long route.
- Flight on 2018-09-12 near Platteville, Colorado
- 35-lb drone with two cameras; planned 50-mile route
- Xcel surveys >320,000 miles of electric and gas infrastructure
⚠ Early, waiver-based flight; no inspection outcome data reported
Why selected: Major US power-industry trade magazine; widely cited milestone
case_study · 2022-04-22
Measuring the Value of Safety: How Drones Are Making Work Safer in the Sewer Industry
Case article on WSSC and AECOM testing an indoor caged drone in WSSC's largest trunk sewer near Washington, D.C. It contrasts confined-space entry risks with the limits of raft cameras and large robots; the author formerly worked for the drone maker.
- Pipe: 102-inch reinforced concrete Anacostia Trunk Sewer, flow ~26 ft/s during test, ~45 million gallons/day dry-weather flow
- Drone: Flyability Elios 2; described as first drone sewer inspection in that region (2021)
- BLS: 1,030 US confined-space occupational deaths 2011–2018
- WSSC must inspect pipes ≥15 in at least every five years
⚠ Promotional tone; author previously worked >4 years at Flyability / No data on flight time, battery or failure rates
Why selected: Specialist commercial drone trade media; named US public utility case
article ·
How Drones Are Changing Confined Space Inspections
A US engineering firm explains its use of a small confined-space drone for tanks, sewers, boilers and tunnels. The aircraft navigates by IMU instead of GPS and carries strong lighting and gas sensors; the firm says manual entry is reduced, not eliminated.
- Drone: Flybotix ASIO X, 16 in wide, 40,000 lumens lighting, four gas sensors
- IMU-based navigation for GPS-denied spaces
⚠ No publication date shown / Benefit claims are qualitative; no project data / Firm's own marketing page
Why selected: US engineering consultancy serving municipalities; concrete GNSS-denied/confined-space capability
article · 2022-10-10
Maintenance: Drones Get A Lift
Chemical-industry trade feature on drone inspection in refineries and chemical plants, including Shell's tank farm at Deer Park, Texas and Novozymes' fermenters in Nebraska. It also notes limits from line-of-sight rules and battery life.
- Chevron: one UAS pilot can check >20 tanks/day vs 3–5 before
- Novozymes (Blair, NE): fermenter inspection under 10 minutes
- Shell holds BVLOS permits in the US and Australia
- Non-US examples (Shell Moerdijk NL, Yara Ambès FR) also covered
⚠ Line-of-sight rules limit range / Payloads shorten battery life / Fully autonomous indoor flight described as a future goal / Some cases are outside the US
Why selected: Leading US chemical-process industry trade magazine; named operator examples
research_paper · 2018-02-28
Development and Evaluation of a Drone-Deployed Wind Turbine Blade Nondestructive Inspection System
Sandia National Laboratories report with SkySpecs on drone-deployed nondestructive inspection of wind blades. After a trade study, thermography was chosen and a miniature IR camera was integrated into the drone and field-tested initially.
- Report SAND2018-3116
- Thermography selected via trade study; miniature microbolometer IR camera integrated on SkySpecs drone
- Initial field testing completed
⚠ Abstract reports no quantitative detection rates / Research-stage system
Why selected: US national laboratory research report (DOE)
article · 2017-02-28
Self-Flying Drones and Wind Turbine Blades: The New Way of Collecting Data
DOE-originated article on SkySpecs, a Michigan startup offering automated blade-inspection drones. It claims fast per-turbine inspections, with Sandia validating the damage-detection algorithms under a DOE small business voucher.
- Under 15 minutes per turbine; up to 17 inspections per day (company figures)
- DOE Small Business Voucher award of $254,000 (2016)
⚠ Mostly company claims; algorithms still being validated / No cost or detection-rate data
Why selected: Federal (DOE) article republished by a major renewable energy trade site
technical_report · 2019-10
Use of Small Unmanned Aerial Systems for Bridge Inspection (FHWA Tech Brief)
FHWA technical brief mapping drone use to each formal bridge inspection type, with platform categories, costs, flight times, sensors, airspace procedures and limitations—a baseline reference for state DOTs.
- 2018 AASHTO survey: 35 of 44 responding state DOTs had some UAS experience
- Multirotor cost bands: compact $800–2,500, intermediate $2,500–10,000, advanced $5,000+
- Typical single-battery flight 20–30 minutes
⚠ Drones supplement but do not replace hands-on fracture-critical inspection
Why selected: Federal highway regulator's official guidance
article · 2020-02-28
Reaching New Heights (summary of FHWA UAS bridge inspection study)
Rutgers CAIT article summarizing an FHWA study of UAS bridge inspection: infrared detected deck delamination consistent with sounding, and 3D models eased photo logging, while data management was flagged as a major challenge.
- IR-detected deck delamination matched traditional sounding in demonstrations
- MnDOT photogrammetric 3D model let inspectors locate images by clicking the structure
- FHWA research expected to conclude March 2020
⚠ Secondary summary; no sample sizes or costs / No CAIT field work described
Why selected: University transportation center (USDOT-funded) publication
technical_report · 2021-09
Effective Practices for Routine Bridge Inspections Using Unmanned Aerial Systems
FHWA tech brief on effective practices from Maine, Utah and Minnesota. It reports time and cost savings and IR detection of missed delamination, but also failures: poor GPS in a ravine made a Colorado 3D model unusable, and 3D workflows can take longer than conventional inspection.
- Maine Ticonic Bridge: 1 day vs ≥2 days previously
- Utah: 16 overhead signs in one day without traffic control vs 3–4/day; ~$100K saved (~$80K traffic control)
- Minnesota 3D model: >17 h total (flight + processing) vs 11 h traditional
- Glenwood Springs (CO): ~32 h post-processing; model unusable due to GPS loss
⚠ UAS may not suit intricate or enclosed steel structures / IR has false positives (stringers, debris, shadows); does not replace sounding / 3D modeling can increase total time
Why selected: Federal research center technical brief with named state cases, including negative results
news · 2025-04-24
Osmose Secures FAA Waiver for Beyond Visual Line of Sight Operations
Press release from utility-pole services firm Osmose announcing an FAA BVLOS waiver not limited to a specific geography, covering Class G airspace nationwide for overhead electric infrastructure inspection. No performance figures are given.
- Waiver not geographically constrained; Class G airspace across the US
- Sensors: optical, infrared, LiDAR
- Osmose: founded 1934, >4,000 employees
⚠ Company press release; no operational results / Date inferred from release ID
Why selected: Concrete regulatory milestone for distribution-line inspection; company case kept within one-third vendor limit
technical_report ·
Georgia DOT UAS FY2024 Annual Report
Georgia DOT's annual UAS report giving flight counts, hours and pilot numbers, with critical infrastructure inspection as a core initiative. It notes a decline in certified pilots and that proposed Part 108 may require capabilities the department lacks.
- 286 UAS operations and >80 flight hours in FY24 (monthly charts sum differently)
- 28 certified pilots (down from 30); bridge inspection unit has 4 pilots and 2 trainees
- Utilization rate up 55%
⚠ No count of bridge inspections or cost savings / Internal figures do not fully reconcile / No publication date given
Why selected: Official state DOT annual report
news · 2019-08-08
EDC News, August 8, 2019 – UAS as a structural inspection tool
FHWA Every Day Counts newsletter featuring UAS for structural inspection of bridges, high-mast lights, confined spaces, retaining walls and tunnels. MnDOT reported average cost savings of 40% over traditional methods.
- MnDOT: average 40% cost savings vs traditional inspection
- Uses: bridges, high mast lights, confined spaces, retaining walls, tunnels; IR and 3D models
⚠ Savings figure as reported by MnDOT; method not detailed
Why selected: Federal technology-deployment program (EDC-5) newsletter
case_study · 2017-02-16
Fly-by Rail Inspection (ASCE Infrastructure Report Card GameChanger)
ASCE Infrastructure Report Card profile of BNSF's drone track inspection under the FAA Pathfinder program, which allowed BVLOS flights over remote track. It frames the effort against derailments caused by damaged rails.
- BNSF was one of three inaugural Pathfinder participants (with CNN and PrecisionHawk)
- Over one-third of 2014 derailments attributed to damaged rails
⚠ Benefits stated qualitatively; no measured outcomes
Why selected: National professional engineering society's flagship report-card site
regulation · 2023-06-08
NYC proposes new regulations for drones that would legalize building facade inspection
Explains NYPD's proposed rules to legalize drone flights in NYC and what they mean for facade inspections under FISP. Requirements include advance applications, insurance and community notice; GPS blockage in Manhattan and FISP's hands-on requirements limit what drones can replace.
- Apply to NYPD 30 days ahead; $150 fee; penalties $250–1,000
- 1948 city law on takeoffs/landings was the main barrier
- Drone facade inspection from ~$5,000 vs scaffolding ≥$7,000 per side (estimates)
- Council bill (Keith Powers) would require ≥1-year pilot program
⚠ Proposed rules at the time / Drones cannot meet all FISP requirements such as sounding / Cost figures are rough estimates quoted in the article
Why selected: Widely read NYC real-estate publication; covers city rule that gates drone facade work
news · 2015-07-01
NMSU to lead research using drones to inspect dams
Regional public-media report that the Bureau of Reclamation chose New Mexico State University to test drone inspection of Elephant Butte Dam and its spillway with lidar, infrared and HD video for cracks, spalls and erosion.
- $35,000 award from Bureau of Reclamation
- Sensors: lidar, infrared, HD video; targets cracks, spalls, subsurface defects, erosion
⚠ Announcement of planned research; no results
Why selected: Public broadcaster report on federal dam-owner research
article · 2017-02-21
The role of drones in telecommunications tower inspection
Telecom trade article on AT&T and Verizon adopting drones for cell tower inspection, including Verizon's post-hurricane site checks. An AT&T manager says drones will make climbers more efficient but not replace them.
- Verizon used drones to inspect cell sites after Hurricane Matthew (NC, SC) and trialed in New Jersey
- AT&T ran a 2016 trial (Art Pregler quoted)
⚠ No quantified safety or cost results / Drones described as complementing, not replacing, tower climbers
Why selected: Major US wireless-industry trade publication
article ·
Thermal Drone Technology for Large-Scale Solar PV Inspections
Contributed feature from a US drone service provider on thermal inspection of utility-scale PV. Radiometric thermal plus RGB imagery locates hotspots from cracked cells, bad connections and bypass-diode failures; weather, irradiance and expertise are limiting factors.
- Radiometric thermal + RGB on pre-programmed flight paths
- Defects targeted: cracked cells, faulty connections, bypass-diode failure, PID
⚠ Vendor-authored; no site, capacity or time data / No publication date shown
Why selected: Kept as the US solar-PV example from trade media; weakest item in this set
regulation · 2026-07-20
FAA Part 108 Explained: Everything Drone Operators Need to Know in 2026
Drone fleet-software company's mid-2026 explainer on Part 108. The final rule was under OIRA review as of July 2026, with publication expected late 2026 or early 2027; it summarizes the shift of responsibility to operating organizations and technical requirements such as detect-and-avoid.
- Final rule sent to OIRA on 2026-07-10; not yet published as of the post
- Proposed limits: up to 1,320 lb, wingspan <25 ft, up to 87 kt
- Rural infrastructure inspection cited as a lower-risk Operating Permit use
⚠ Vendor blog; timeline is an estimate / Rule status may have changed after 2026-07-20
Why selected: Recent (2026) explainer high in search results for Part 108; complements the 2025 legal analysis
news · 2016-11-09
Kansas DOT program testing drones for bridge and tower inspections
Reports Kansas DOT's new UAS program, in which aviation and bridge-inspection teams tested drones on bridges and towers; officials said drones could reduce the need to put engineers in dangerous positions.
- Led by KDOT Aviation and Bridge Inspection teams; UAS Director Bob Brock quoted
- Cites AASHTO estimate of $250 vs ~$4,600 per bridge inspection
⚠ Early test announcement; no results / Cost figure is the AASHTO/MDOT estimate, not Kansas data
Why selected: National construction-equipment trade publication; state DOT program
news · 2023-04-05
Florida's ban of Chinese drones leaves local fire, police scrambling to rebuild fleets
Reports that Florida's ban on Chinese-made drones for state and local agencies grounded dozens of police and fire drones in South Florida, forcing costly replacements from an approved list. Selected as a procurement risk relevant to public-sector inspection fleets.
- 'Dozens' of drones grounded; replacement costs of 'hundreds of thousands of dollars'
⚠ Only page metadata/description was retrievable, not the full body / Article concerns public safety agencies; inspection impact is an inference by the compiler
Why selected: Local TV news (Miami); the Florida ban was widely covered nationally
research_paper ·
Synthesis of Capabilities, Opportunities, and Research Needs in UAS Technology for High-Precision Bridge Inspection
TRB TRID record for a synthesis of UAS capabilities, opportunities and research needs for high-precision bridge inspection. Judged from the title only; neither abstract nor full text was checked.
⚠ Only the search-result title was seen; contents, authors and date unverified
Why selected: Indexed in TRB's TRID, the main US transportation research database
news · 2021-07-28
How Wind Turbine Blades Are Inspected by Drones
Bloomberg piece on how drones inspect wind turbine blades, chosen as a mainstream national business-media treatment of the topic. Body text was not checked.
⚠ Only the search-result title and URL date were seen; likely paywalled / Location of cases not verified
Why selected: Major US national business news outlet