GRAND LOOP ROAD
Carrying GRAND LOOP ROAD over RAVINE
4.5 MI. SOUTH OF MAMMOTH, Park, Wyoming
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
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. Its NBI inventory load rating is 27.2 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How GRAND LOOP ROAD compares
Live comparison across Wyoming.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
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
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in poor condition (3/9), showing advanced deterioration that may require priority repair.
- • 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.
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.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.