Sw Cnty Rd 51
Carrying Sw Cnty Rd 51 over Sweetwater Creek
County Road 51, Sweetwater, Wyoming
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
Sw Cnty Rd 51 in Sweetwater, Wyoming sits above 31% of rated Wyoming bridges on inventory load rating (31 t), while its 1975 build year is earlier than 40% of Sweetwater's recorded-year cohort (191 bridges).
Sw Cnty Rd 51 in Sweetwater, Wyoming is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1975, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 3. 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 WY:FJL
INTERSTATE-ERA · CONCRETE · MULTI-SPAN · SUPER-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- MULTI-SPAN 3 spans
- SUPER-LED Superstructure-led
- ARTERIAL-ADT Arterial 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: Sw Cnty Rd 51
The Sw Cnty Rd 51 bridge in Sweetwater, Wyoming carries Sw Cnty Rd 51 over Sweetwater Creek. It was built in 1975, making it 51 years old today. The structure is built primarily of concrete and spans 3 sections, stretching 22.6 meters (74 feet) end to end. Daily traffic averages 2,234 vehicles, placing it in the moderately-trafficked tier of Wyoming bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 3/9, substructure at 6/9. 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 Sw Cnty Rd 51 compares
Age against the county: built in 1975, earlier than 77 of Sweetwater's 191 bridges with a recorded construction year (40%), against a county median build year of 1967. This is one of the newer structures in its county.
Live comparison across Wyoming bridges with a recorded inventory load rating (3,118 of 3,136 rated).
Sw Cnty Rd 51 vs every rated Wyoming bridge
Inventory load rating (metric tons), FHWA NBI, this state
31 Top 69% higher than 31% of 3,118 bridges
rated Wyoming 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.
Sweetwater inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 191 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
- 1975
- Material
- Concrete
- Number of Spans
- 3
- Structure Length
- 22.6 m (74 ft)
- Deck Width
- 10.1 m (33 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 2,234 vehicles/day
- Structure Number
- FJL
Condition Analysis
- • At 6/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • The superstructure (beams and supports above the deck) rates poor at 3/9, with advanced deterioration recorded on the latest inspection.
- • The substructure (piers and abutments) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
Sw Cnty Rd 51 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 Sw Cnty Rd 51 against other structures in Sweetwater and across Wyoming. Wyoming 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 Sw Cnty Rd 51?
Sw Cnty Rd 51 in Sweetwater, Wyoming has a deck rating of 6/9, superstructure rating of 3/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is Sw Cnty Rd 51 inspected?
Sw Cnty Rd 51'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 2,234 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Sw Cnty Rd 51 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 Sw Cnty Rd 51?
Sw Cnty Rd 51 has an NBI inventory load rating of 30.8 metric tons.
Who is responsible for maintaining Sw Cnty Rd 51?
Sw Cnty Rd 51 is owned and maintained by County Highway Agency.
How old is Sw Cnty Rd 51 and does age affect safety?
Sw Cnty Rd 51 was built in 1975, making it 51 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.
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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.