SB 23 - SB 101
SB 23 - SB 101 in 07-Ven-023-R3.34-Thok, Ventura County, California received a condition grade of B (67/100). Built in 1970, the bridge carries 155K vehicles daily on SB 23 - SB 101 over U.S. Highway 101.
SB 23 - SB 101 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 1970 and is now 56 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. SB 23 - SB 101 carries an average daily traffic count of 155,000 vehicles, with 2 lane(s) crossing U.S. Highway 101. 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
SB 23 - SB 101 is a 56-year-old bridge located 07-Ven-023-R3.34-Thok in Ventura County, California. The bridge carries SB 23 - SB 101 over U.S. Highway 101 with 2 traffic lanes, handling approximately 155K vehicles per day. Built in 1970, the structure spans 317.5 meters.
The bridge received a Condition Grade of B (67/100) based on Federal Highway Administration inspection data. Its deck is rated 5/9 (fair), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
SB 23 - SB 101 has a Condition Score of 67/100 (Grade B). Its deck is rated 5/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
SB 23 - SB 101 was built in 1970, making it 56 years old. The average bridge age in the United States is 48 years.
SB 23 - SB 101 carries approximately 155K vehicles per day (average daily traffic). The bridge has 2 traffic lanes. It is 317.5 meters long and located on SB 23 - SB 101 in 07-Ven-023-R3.34-Thok, Ventura County, California.
No, SB 23 - SB 101 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
SB 23 - SB 101 is located 07-Ven-023-R3.34-Thok in Ventura County, California. The bridge carries SB 23 - SB 101 over U.S. Highway 101. Its coordinates are 34.175411, -118.858419. It is maintained by State Highway Agency.
SB 23 - SB 101 carries SB 23 - SB 101 over U.S. Highway 101. The bridge is 317.5 meters long and was built in 1970.
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.