STC 6774;TETON HWY
Carrying STC 6774;TETON HWY over S.FK.TETON RIVER
0.5 N. TETON, Fremont, Idaho
FHWA NBI inspection record for this structure. Condition ratings, inventory load rating, span, deck width, and average daily traffic refresh annually with each NBI release.
Bridge Snapshot: STC 6774;TETON HWY
The STC 6774;TETON HWY bridge in Fremont, Idaho carries STC 6774;TETON HWY over S.FK.TETON RIVER. It was built in 1977, making it 49 years old today. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 45.7 meters (150 feet) end to end. Daily traffic averages 1,200 vehicles, placing it in the moderately-trafficked tier of Idaho bridges. It is owned and maintained by County Highway Agency, the entity responsible for routine inspections and any needed repairs.
The latest FHWA inspection records show a deck rating of 4/9, superstructure at 4/9, substructure at 5/9 on the 0–9 NBI scale, where 9 is excellent and 0 is failed. The weakest component sits in poor condition, which drives the overall status of this bridge. Because at least one major component scores 4 or lower, the FHWA classifies this bridge as structurally deficient — a maintenance flag, not a closure order. Its NBI inventory load rating is 0.9 metric tons — the load level the structure is rated to carry at inventory (long-term) level.
In a county that maintains hundreds of NBI-tracked bridges, STC 6774;TETON HWY is one data point in a Idaho inventory that FHWA inspects on a two-year cycle (more often when ratings fall). Bridge age alone is not a reliable safety signal — a 49-era structure can outperform a newer one when maintenance is consistent, materials are sound, and traffic loads stay within design limits. Use the condition ratings above, the sufficiency score, and the structurally-deficient flag together to read the bridge's real status, and check the linked county and state pages to see how this bridge ranks against its peers.
Every figure on this page comes directly from the Federal Highway Administration National Bridge Inventory (NBI), the public dataset that catalogs more than 617,000 highway bridges across the United States and is updated annually from the records that each state Department of Transportation submits to the FHWA. The condition codes use the standardized FHWA Recording and Coding Guide, the same scale that determines federal eligibility for the Highway Bridge Program and the Surface Transportation Block Grant set-aside for off-system bridges. A "structurally deficient" classification under those federal criteria is a maintenance and funding flag, never a closure order; states keep deficient bridges open with load posting, weight limits, or accelerated inspection cycles until rehabilitation or replacement is funded. See our methodology for refresh cadence and the exact NBI release vintage powering each record.
How STC 6774;TETON HWY compares
NBI inventory load rating (metric tons) and structural-deficiency status compared across Idaho, computed live from the FHWA NBI.
Condition Ratings
Ratings are on a 0–9 scale: 9 = Excellent, 7–8 = Good, 5–6 = Fair, 3–4 = Poor, 0–2 = Critical/Failed. Sufficiency rating (0–100) combines structural adequacy, functional obsolescence, and essentiality.
Structural Details
- Year Built
- 1977
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 45.7 m (150 ft)
- Deck Width
- 11.6 m (38 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 1,200 vehicles/day
- Structure Number
- 000000000021035
Location
Data Source
Data from the FHWA National Bridge Inventory (NBI). Bridge inspections are required every two years by federal law. Conditions reflect the most recent inspection.
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Guides
Condition Analysis
Built in 1977, this bridge is 49 years old. It carries approximately 1,200 vehicles per day. Based on the most recent FHWA inspection:
- • The deck (driving surface) is in poor condition (4/9), showing advanced deterioration that may require priority repair.
- • The superstructure (beams and supports above the deck) is in poor condition (4/9), showing advanced deterioration that may require priority repair.
- • The substructure (piers and abutments) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
Its NBI inventory load rating is low, indicating a load-restricted structure. This bridge is classified as structurally deficient, meaning at least one major component is rated in poor condition. This does not mean the bridge is unsafe — it means it requires repair or monitoring.
Frequently Asked Questions
What do the condition ratings mean for STC 6774;TETON HWY?
Bridge condition ratings use a 0–9 scale set by the Federal Highway Administration (FHWA). Ratings 7–9 indicate good condition with no significant problems. Ratings 5–6 mean fair condition with minor issues. Ratings 3–4 indicate poor condition requiring repair. Ratings 0–2 are critical, meaning the bridge has serious structural problems. STC 6774;TETON HWY in Fremont, Idaho has a deck rating of 4/9, superstructure rating of 4/9, and substructure rating of 5/9.
How often is STC 6774;TETON HWY inspected?
Federal law requires most highway bridges to be inspected at least every 24 months. Bridges in poor condition or with known issues may be inspected more frequently (every 12 months or less). STC 6774;TETON HWY is part of the National Bridge Inventory maintained by the FHWA. With 1,200 vehicles crossing daily, regular inspection is essential.
What does "structurally deficient" mean for a bridge?
A structurally deficient bridge has at least one major component (deck, superstructure, or substructure) rated 4 or below on the FHWA 0–9 scale. This classification does NOT mean the bridge is unsafe for travel — it means the bridge needs repair, rehabilitation, or eventual replacement. Structurally deficient bridges remain open and are monitored. STC 6774;TETON HWY is currently classified as structurally deficient.
What is the inventory load rating for STC 6774;TETON HWY?
The NBI inventory rating is the load level a bridge is rated to carry for an indefinite period, recorded in metric tons. A lower number means the structure is more load-restricted. STC 6774;TETON HWY has an inventory load rating of 0.9 metric tons. It is distinct from the FHWA sufficiency rating, a separate 0–100 funding-eligibility score that this dataset does not include.
Who is responsible for maintaining STC 6774;TETON HWY?
Bridge ownership and maintenance responsibility varies — bridges may be owned by state DOTs, counties, cities, railroads, or federal agencies. STC 6774;TETON HWY is maintained by County Highway Agency. The FHWA oversees the National Bridge Inventory program and sets inspection standards, but day-to-day maintenance falls to the owning agency. If you notice damage or safety concerns, contact your state DOT or call 911 for emergencies.
How old is STC 6774;TETON HWY and does age affect safety?
STC 6774;TETON HWY was built in 1977, making it 49 years old. Bridge age alone does not determine safety — condition depends on materials, design, traffic load, maintenance history, and environmental exposure. Many older bridges remain in good condition due to regular maintenance and reconstruction.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A structurally deficient rating does not mean a bridge is closed or unsafe for travel — it indicates the bridge requires repair or replacement. For current closure or safety information, contact your state DOT.
Read our methodology — how this data is sourced, computed, and verified.
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| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |