Richardson Highway over Lowe River Lwr Keystone
PoorCounty 063, Alaska · Mile Point 19.3 · Structure no. 1383
- Built
- 1980
- 45 years old
- Condition
- Poor
- inspected August 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 303 ft
- 3 main spans
- Daily traffic
- 810
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Richardson Highway over Lowe River Lwr Keystone is a prestressed concrete tee beam carrying Richardson Highway over Lowe River Lwr Keystone in County 063, Alaska. It was built in 1980, so it is 45 years old, older than the Alaska average of 35.9 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 810 vehicles a day, roughly 24% of them trucks, projected to reach 1,740 by 2039. The structure is 303 ft (92.4 m) long and 37 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Richardson Highway over Lowe River Lwr Keystone built?
It was built in 1980, making it 45 years old in 2025.
What condition is Richardson Highway over Lowe River Lwr Keystone 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 August 2023.
How much traffic does Richardson Highway over Lowe River Lwr Keystone carry?
About 810 vehicles per day (2020 count), of which roughly 24% are trucks.
How long is Richardson Highway over Lowe River Lwr Keystone?
The structure is 303 ft (92.4 m) long with a longest span of 102 ft (31.1 m) and a deck 37 ft wide.
Who owns Richardson Highway over Lowe River Lwr Keystone?
It is owned by the State Highway Agency.