GRAND LOOP ROAD
Carrying GRAND LOOP ROAD over RAVINE
4.5 MI. SOUTH OF MAMMOTH, Park, Wyoming
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
GRAND LOOP ROAD in Park, Wyoming sits above 18% of rated Wyoming bridges on inventory load rating (27 t), while its 1977 build year is earlier than 47% of Park's recorded-year cohort (187 bridges).
GRAND LOOP ROAD in Park, Wyoming is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1977, 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:1570001P0000000
INTERSTATE-ERA · PRESTRESS · LONG-SPAN-RUN · DECK-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- LONG-SPAN-RUN 6 spans
- DECK-LED Deck-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: GRAND LOOP ROAD
The GRAND LOOP ROAD bridge in Park, Wyoming carries GRAND LOOP ROAD over RAVINE. It was built in 1977, making it 49 years old today. The structure is built primarily of prestressed concrete continuous and spans 6 sections, stretching 99.7 meters (327 feet) end to end. Daily traffic averages 1,807 vehicles, placing it in the moderately-trafficked tier of Wyoming bridges. It is owned and maintained by National Park Service.
The latest FHWA inspection records show a deck rating of 3/9, superstructure at 6/9, substructure at 7/9. The weakest component sits in poor condition. Because at least one major component scores 4 or lower, this bridge falls in FHWA's Poor condition category. That category is not a closure order.
How GRAND LOOP ROAD compares
Age against the county: built in 1977, earlier than 88 of Park's 187 bridges with a recorded construction year (47%), against a county median build year of 1974. 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).
GRAND LOOP ROAD vs every rated Wyoming bridge
Inventory load rating (metric tons), FHWA NBI, this state
27 Top 82% higher than 18% 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.
Park inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 187 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
- 1977
- Material
- Prestressed Concrete Continuous
- Number of Spans
- 6
- Structure Length
- 99.7 m (327 ft)
- Deck Width
- 9.8 m (32 ft)
- Owner
- National Park Service
- Avg Daily Traffic
- 1,807 vehicles/day
- Structure Number
- 1570001P0000000
Condition Analysis
- • The deck (driving surface) is in poor condition (3/9), showing advanced deterioration on the inspecting agency's 0-9 scale.
- • At 6/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • 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
GRAND LOOP ROAD 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 GRAND LOOP ROAD against other structures in Park 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 GRAND LOOP ROAD?
GRAND LOOP ROAD in Park, Wyoming has a deck rating of 3/9, superstructure rating of 6/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is GRAND LOOP ROAD inspected?
GRAND LOOP ROAD'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 1,807 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. GRAND LOOP ROAD 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 GRAND LOOP ROAD?
GRAND LOOP ROAD has an NBI inventory load rating of 27.2 metric tons.
Who is responsible for maintaining GRAND LOOP ROAD?
GRAND LOOP ROAD is owned and maintained by National Park Service.
How old is GRAND LOOP ROAD and does age affect safety?
GRAND LOOP ROAD was built in 1977, making it 49 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.