OLD 99W
Carrying OLD 99W over STONE CORRAL CREEK
0.6 MI N MXWL-SITES RD, Colusa, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: OLD 99W
The OLD 99W bridge in Colusa, California carries OLD 99W over STONE CORRAL CREEK. It was built in 1927, making it 99 years old today. It was last reconstructed in 1955, extending its service life. The structure is built primarily of concrete and spans 3 sections, stretching 18.6 meters (61 feet) end to end. Daily traffic averages 1,976 vehicles, placing it in the moderately-trafficked tier of California bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 4/9, substructure at 7/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 24.3 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How OLD 99W compares
Live comparison across California.
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 How the historical reference is calculated.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
- 1927
- Last Reconstructed
- 1955
- Material
- Concrete
- Number of Spans
- 3
- Structure Length
- 18.6 m (61 ft)
- Deck Width
- 12.4 m (41 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 1,976 vehicles/day
- Structure Number
- 15C0090
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
- • The superstructure (beams and supports above the deck) rates poor at 4/9, advanced deterioration that should be prioritized for repair.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
How to read this record
OLD 99W 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 OLD 99W against other structures in Colusa 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 OLD 99W?
OLD 99W in Colusa, California has a deck rating of 5/9, superstructure rating of 4/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is OLD 99W inspected?
OLD 99W'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 1,976 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. OLD 99W 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 OLD 99W?
OLD 99W has an NBI inventory load rating of 24.3 metric tons.
Who is responsible for maintaining OLD 99W?
OLD 99W is owned and maintained by County Highway Agency.
How old is OLD 99W and does age affect safety?
OLD 99W was built in 1927, making it 99 years old and last reconstructed in 1955.
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.