IRR DUNCAN POND RD
Carrying IRR DUNCAN POND RD over SOUTH BRANCH
23KM NORTH OF JACKMAN, Somerset, Maine
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
IRR DUNCAN POND RD in Somerset, Maine sits above 2% of rated Maine bridges on inventory load rating (13 t), while its 1990 build year is earlier than 26% of Somerset's recorded-year cohort (173 bridges).
IRR DUNCAN POND RD in Somerset, Maine is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1990, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure ME:00000000000S555
LATE-CENTURY · STEEL · SINGLE-SPAN · TIED-CTRL · TRACE-ADT · LIGHT-LOAD · CAT-GOOD
- LATE-CENTURY 1980–1999
- STEEL Steel
- SINGLE-SPAN Single span
- TIED-CTRL Tied control
- TRACE-ADT Trace ADT
- LIGHT-LOAD Light load
- CAT-GOOD Good
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: IRR DUNCAN POND RD
The IRR DUNCAN POND RD bridge in Somerset, Maine carries IRR DUNCAN POND RD over SOUTH BRANCH. It was built in 1990, making it 36 years old today. It was last reconstructed in 2020, extending its service life. The structure is built primarily of steel and spans 1 section, stretching 19.9 meters (65 feet) end to end. Daily traffic averages 25 vehicles, placing it in the lower-traffic tier of Maine bridges. It is owned and maintained by Bureau of Indian Affairs.
The latest FHWA inspection records show a deck rating of 8/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How IRR DUNCAN POND RD compares
Age against the county: built in 1990, earlier than 45 of Somerset's 173 bridges with a recorded construction year (26%), against a county median build year of 1964. This is one of the newer structures in its county.
Live comparison across Maine bridges with a recorded inventory load rating (2,518 rated).
IRR DUNCAN POND RD vs every rated Maine bridge
Inventory load rating (metric tons), FHWA NBI, this state
13 Top 98% higher than 2% of 2,518 bridges
rated Maine bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
Somerset inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 173 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1990
- Last Reconstructed
- 2020
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 19.9 m (65 ft)
- Deck Width
- 4.8 m (16 ft)
- Owner
- Bureau of Indian Affairs
- Avg Daily Traffic
- 25 vehicles/day
- Structure Number
- 00000000000S555
Condition Analysis
- • The deck (driving surface) rates good at 8/9, with no significant deterioration on file.
- • At 7/9, the superstructure (beams and supports above the deck) is in good shape and shows no significant wear.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether IRR DUNCAN POND RD is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare IRR DUNCAN POND RD against other structures in Somerset and across Maine. Maine bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for IRR DUNCAN POND RD?
IRR DUNCAN POND RD in Somerset, Maine has a deck rating of 8/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is IRR DUNCAN POND RD inspected?
IRR DUNCAN POND RD's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 25 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IRR DUNCAN POND RD is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for IRR DUNCAN POND RD?
IRR DUNCAN POND RD has an NBI inventory load rating of 12.9 metric tons.
Who is responsible for maintaining IRR DUNCAN POND RD?
IRR DUNCAN POND RD is owned and maintained by Bureau of Indian Affairs.
How old is IRR DUNCAN POND RD and does age affect safety?
IRR DUNCAN POND RD was built in 1990, making it 36 years old and last reconstructed in 2020.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.