SR 77
Carrying SR 77 over Wash
12.3 mi S Jct SR 79, Pima, Arizona
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: SR 77
The SR 77 bridge in Pima, Arizona carries SR 77 over Wash. It was built in 1979, making it 47 years old today. It was last reconstructed in 2008, extending its service life. The structure is built primarily of concrete continuous and spans 6 sections, stretching 21.0 meters (69 feet) end to end. Daily traffic averages 22,691 vehicles, placing it in the heavily-trafficked tier of Arizona bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show culvert at 7/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 81.6 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How SR 77 compares
Live comparison across Arizona.
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 How the historical reference is calculated.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
- 1979
- Last Reconstructed
- 2008
- Material
- Concrete Continuous
- Number of Spans
- 6
- Structure Length
- 21.0 m (69 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 22,691 vehicles/day
- Structure Number
- 06757
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 SR 77 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 SR 77 against other structures in Pima and across Arizona. Arizona 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 SR 77?
SR 77 in Pima, Arizona on the FHWA's 0–9 scale.
How often is SR 77 inspected?
SR 77'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 22,691 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SR 77 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 SR 77?
SR 77 has an NBI inventory load rating of 81.6 metric tons.
Who is responsible for maintaining SR 77?
SR 77 is owned and maintained by State Highway Agency.
How old is SR 77 and does age affect safety?
SR 77 was built in 1979, making it 47 years old and last reconstructed in 2008.
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.