Lamb Rd
Carrying Lamb Rd over Santa Rosa Canal
0.5 mi S Jct Houser Road, Pinal, Arizona
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: Lamb Rd
The Lamb Rd bridge in Pinal, Arizona carries Lamb Rd over Santa Rosa Canal. It was built in 1987, making it 39 years old today. It was last reconstructed in 1989, extending its service life. The structure is built primarily of prestressed concrete and spans 1 section, stretching 17.4 meters (57 feet) end to end. Daily traffic averages 60 vehicles, placing it in the lower-traffic tier of Arizona bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 7/9, substructure at 8/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 48.1 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How Lamb Rd 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 How the historical reference is calculated.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
- 1987
- Last Reconstructed
- 1989
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 17.4 m (57 ft)
- Deck Width
- 13.8 m (45 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 60 vehicles/day
- Structure Number
- 08962
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • 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) is in good condition (8/9), showing no significant deterioration.
How to read this record
This page shows what the last federal inspection recorded, not whether Lamb Rd 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 Lamb Rd against other structures in Pinal 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 Lamb Rd?
Lamb Rd in Pinal, Arizona has a deck rating of 6/9, superstructure rating of 7/9, and substructure rating of 8/9 on the FHWA's 0–9 scale.
How often is Lamb Rd inspected?
Lamb Rd'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 60 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Lamb Rd is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for Lamb Rd?
Lamb Rd has an NBI inventory load rating of 48.1 metric tons.
Who is responsible for maintaining Lamb Rd?
Lamb Rd is owned and maintained by County Highway Agency.
How old is Lamb Rd and does age affect safety?
Lamb Rd was built in 1987, making it 39 years old and last reconstructed in 1989.
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.