INTERSTATE 5 NB
INTERSTATE 5 NB in 10-Sj-005-29.56, San Joaquin County, California received a condition grade of C (55/100). Built in 1968, the bridge carries 124K vehicles daily on INTERSTATE 5 NB over Brookside Calaveras Riv. It is classified as structurally deficient.
INTERSTATE 5 NB carries a C on the BridgeSafety Condition Score with 55/100. Component ratings sit in the middle of the FHWA NBI distribution; rehabilitation programming is likely on the owning agency’s medium-term horizon.
The bridge was built in 1968 and is now 58 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. INTERSTATE 5 NB carries an average daily traffic count of 124,000 vehicles, with 8 lane(s) crossing Brookside Calaveras Riv. 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
INTERSTATE 5 NB is a 58-year-old bridge located 10-Sj-005-29.56 in San Joaquin County, California. The bridge carries INTERSTATE 5 NB over Brookside Calaveras Riv with 8 traffic lanes, handling approximately 124K vehicles per day. Built in 1968 and reconstructed in 2017, the structure spans 158.5 meters.
The bridge received a Condition Grade of C (55/100) based on Federal Highway Administration inspection data. Its deck is rated 5/9 (fair), superstructure 7/9 (good), and substructure 4/9 (poor). The bridge is classified as structurally deficient, meaning at least one major component is rated 4 or below, this signals a need for repair or replacement but does not necessarily indicate an immediate safety hazard.
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
INTERSTATE 5 NB has a Condition Score of 55/100 (Grade C). Its deck is rated 5/9, superstructure 7/9, and substructure 4/9 on the NBI scale. The bridge is classified as structurally deficient.
INTERSTATE 5 NB was built in 1968 and reconstructed in 2017, making it 58 years old. The average bridge age in the United States is 48 years.
INTERSTATE 5 NB carries approximately 124K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 158.5 meters long and located on INTERSTATE 5 NB in 10-Sj-005-29.56, San Joaquin County, California.
Yes, INTERSTATE 5 NB is classified as structurally deficient because at least one of its primary components (deck, superstructure, or substructure) is rated 4 or below on the 0-9 NBI scale. This does not necessarily mean it is unsafe, but it requires significant repair or replacement.
INTERSTATE 5 NB is located 10-Sj-005-29.56 in San Joaquin County, California. The bridge carries INTERSTATE 5 NB over Brookside Calaveras Riv. Its coordinates are 37.978528, -121.340708. It is maintained by State Highway Agency.
INTERSTATE 5 NB carries INTERSTATE 5 NB over Brookside Calaveras Riv. The bridge is 158.5 meters long and was built in 1968, with reconstruction in 2017.
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.