Knudsen Drive over UP RR & Golden State HWY
PoorKern County, California · 0.25 MI N of Norris RD W · Structure no. 50C0071
- Built
- 1948
- 77 years old, rebuilt 1998
- Condition
- Poor
- inspected November 2022
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 489 ft
- 9 main spans
- Daily traffic
- 4,000
- 2005 count
- Owner
- County
- County Highway Agency
About this bridge
Knudsen Drive over UP RR & Golden State HWY is a steel continuous stringer/multi-beam or girder carrying Knudsen Drive over UP RR & Golden State HWY in Kern County, California. It was built in 1948 and reconstructed in 1998, so it is 77 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 4,000 vehicles a day, roughly 10% of them trucks, projected to reach 8,723 by 2042. The structure is 489 ft (149 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Knudsen Drive over UP RR & Golden State HWY built?
It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1998.
What condition is Knudsen Drive over UP RR & Golden State HWY in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2022.
How much traffic does Knudsen Drive over UP RR & Golden State HWY carry?
About 4,000 vehicles per day (2005 count), of which roughly 10% are trucks.
How long is Knudsen Drive over UP RR & Golden State HWY?
The structure is 489 ft (149 m) long with a longest span of 61 ft (18.6 m) and a deck 33 ft wide.
Who owns Knudsen Drive over UP RR & Golden State HWY?
It is owned by the County Highway Agency.