STATE ROUTE 51
STATE ROUTE 51 in 03-Sac-051-8.06-Sac, Sacramento County, California received a condition grade of B (67/100). Built in 1954, the bridge carries 145K vehicles daily on STATE ROUTE 51 over Arcade Creek.
STATE ROUTE 51 carries a B on the BridgeSafety Condition Score with 67/100. Most component ratings are solid; one or two may show wear consistent with the structure’s age, but the bridge is not flagged as structurally deficient.
The bridge was built in 1954 and is now 72 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. STATE ROUTE 51 carries an average daily traffic count of 145,000 vehicles, with 6 lane(s) crossing Arcade Creek. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
Component Ratings
The riding surface, evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
STATE ROUTE 51 is a 72-year-old bridge located 03-Sac-051-8.06-Sac in Sacramento County, California. The bridge carries STATE ROUTE 51 over Arcade Creek with 6 traffic lanes, handling approximately 145K vehicles per day. Built in 1954 and reconstructed in 1968, the structure spans 31.2 meters.
The bridge received a Condition Grade of B (67/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
STATE ROUTE 51 has a Condition Score of 67/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
STATE ROUTE 51 was built in 1954 and reconstructed in 1968, making it 72 years old. The average bridge age in the United States is 48 years.
STATE ROUTE 51 carries approximately 145K vehicles per day (average daily traffic). The bridge has 6 traffic lanes. It is 31.2 meters long and located on STATE ROUTE 51 in 03-Sac-051-8.06-Sac, Sacramento County, California.
No, STATE ROUTE 51 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
STATE ROUTE 51 is located 03-Sac-051-8.06-Sac in Sacramento County, California. The bridge carries STATE ROUTE 51 over Arcade Creek. Its coordinates are 38.640703, -121.382033. It is maintained by State Highway Agency.
STATE ROUTE 51 carries STATE ROUTE 51 over Arcade Creek. The bridge is 31.2 meters long and was built in 1954, with reconstruction in 1968.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.