STATE ROUTE 108
Carrying STATE ROUTE 108 over EAST AVENUE
10-TUO-108-R11.30, Tuolumne, California
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
STATE ROUTE 108 in Tuolumne, California sits above 36% of rated California bridges on inventory load rating (32 t), while its 1966 build year is earlier than 51% of Tuolumne's recorded-year cohort (125 bridges).
STATE ROUTE 108 in Tuolumne, California is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1966, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good 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 CA:32 0038
INTERSTATE-ERA · CONCRETE · MULTI-SPAN · TIED-CTRL · ARTERIAL-ADT · STANDARD-LOAD · CAT-GOOD
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- MULTI-SPAN 3 spans
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial ADT
- STANDARD-LOAD Standard load
- CAT-GOOD Good
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: STATE ROUTE 108
The STATE ROUTE 108 bridge in Tuolumne, California carries STATE ROUTE 108 over EAST AVENUE. It was built in 1966, making it 60 years old today. The structure is built primarily of concrete continuous and spans 3 sections, stretching 70.1 meters (230 feet) end to end. Daily traffic averages 7,900 vehicles, placing it in the moderately-trafficked tier of California bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. None of this bridge's reported major components fall into the Poor condition range.
How STATE ROUTE 108 compares
Age against the county: built in 1966, earlier than 64 of Tuolumne's 125 bridges with a recorded construction year (51%), against a county median build year of 1968. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across California bridges with a recorded inventory load rating (25,538 of 25,848 rated).
STATE ROUTE 108 vs every rated California bridge
Inventory load rating (metric tons), FHWA NBI, this state
32 Top 64% higher than 36% of 25,538 bridges
rated California 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.
Tuolumne inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 125 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
- 1966
- Material
- Concrete Continuous
- Number of Spans
- 3
- Structure Length
- 70.1 m (230 ft)
- Deck Width
- 12.8 m (42 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 7,900 vehicles/day
- Structure Number
- 32 0038
Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • At 7/9, the superstructure (beams and supports above the deck) is in good shape and shows no significant wear.
- • The substructure (piers and abutments) rates good at 7/9, with no significant deterioration on file.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether STATE ROUTE 108 is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare STATE ROUTE 108 against other structures in Tuolumne and across California. California 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 STATE ROUTE 108?
STATE ROUTE 108 in Tuolumne, California has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is STATE ROUTE 108 inspected?
STATE ROUTE 108'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 7,900 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. STATE ROUTE 108 is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for STATE ROUTE 108?
STATE ROUTE 108 has an NBI inventory load rating of 31.8 metric tons.
Who is responsible for maintaining STATE ROUTE 108?
STATE ROUTE 108 is owned and maintained by State Highway Agency.
How old is STATE ROUTE 108 and does age affect safety?
STATE ROUTE 108 was built in 1966, making it 60 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.