TUNNEL DAM RD
Carrying TUNNEL DAM RD over NIANGUA RIVER
S 23 T 37 N R 18 W, Camden, Missouri
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
TUNNEL DAM RD in Camden, Missouri sits above 30% of rated Missouri bridges on inventory load rating (25 t), while its 1992 build year is earlier than 55% of Camden's recorded-year cohort (92 bridges).
TUNNEL DAM RD in Camden, Missouri is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1992, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. The lowest applicable rating sets the federal condition category, so this Poor 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 MO:17261
LATE-CENTURY · CONCRETE · LONG-SPAN-RUN · SUB-LED · LOCAL-ADT · STANDARD-LOAD · CAT-POOR
- LATE-CENTURY 1980–1999
- CONCRETE Concrete
- LONG-SPAN-RUN 15 spans
- SUB-LED Substructure-led
- LOCAL-ADT Local ADT
- STANDARD-LOAD Standard load
- CAT-POOR Poor
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: TUNNEL DAM RD
The TUNNEL DAM RD bridge in Camden, Missouri carries TUNNEL DAM RD over NIANGUA RIVER. It was built in 1992, making it 34 years old today. The structure is built primarily of concrete and spans 15 sections, stretching 38.7 meters (127 feet) end to end. Daily traffic averages 70 vehicles, placing it in the lower-traffic tier of Missouri bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 6/9, substructure at 4/9. The weakest component sits in poor condition. A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed.
How TUNNEL DAM RD compares
Age against the county: built in 1992, earlier than 51 of Camden's 92 bridges with a recorded construction year (55%), against a county median build year of 1995. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Missouri bridges with a recorded inventory load rating (24,616 of 24,618 rated).
TUNNEL DAM RD vs every rated Missouri bridge
Inventory load rating (metric tons), FHWA NBI, this state
25 Top 70% higher than 30% of 24,616 bridges
rated Missouri 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.
Camden inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 92 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
- 1992
- Material
- Concrete
- Number of Spans
- 15
- Structure Length
- 38.7 m (127 ft)
- Deck Width
- 4.7 m (15 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 70 vehicles/day
- Structure Number
- 17261
Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • At 4/9, the substructure (piers and abutments) is in poor shape, with advanced wear on file for this vintage.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
TUNNEL DAM RD is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare TUNNEL DAM RD against other structures in Camden and across Missouri. Missouri 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 TUNNEL DAM RD?
TUNNEL DAM RD in Camden, Missouri has a deck rating of 6/9, superstructure rating of 6/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is TUNNEL DAM RD inspected?
TUNNEL DAM 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 70 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. TUNNEL DAM RD is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for TUNNEL DAM RD?
TUNNEL DAM RD has an NBI inventory load rating of 25.2 metric tons.
Who is responsible for maintaining TUNNEL DAM RD?
TUNNEL DAM RD is owned and maintained by County Highway Agency.
How old is TUNNEL DAM RD and does age affect safety?
TUNNEL DAM RD was built in 1992, making it 34 years old.
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.