US 12 / Heron ST over Wishkah River
PoorGrays Harbor County, Washington · 0.1 E JCT US 101 · Structure no. 000000LM0000000
- Built
- 1949
- 76 years old
- Condition
- Poor
- inspected March 2023
- Type
- Movable - Swing
- Steel Continuous
- Length
- 235 ft
- 2 main spans
- Daily traffic
- 14,965
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 / Heron ST over Wishkah River is a steel continuous movable - swing carrying US 12 / Heron ST over Wishkah River in Grays Harbor County, Washington. It was built in 1949, so it is 76 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 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 14,965 vehicles a day, roughly 6% of them trucks, projected to reach 15,763 by 2039. The structure is 235 ft (71.6 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 12 / Heron ST over Wishkah River built?
It was built in 1949, making it 76 years old in 2025.
What condition is US 12 / Heron ST over Wishkah River 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 March 2023.
How much traffic does US 12 / Heron ST over Wishkah River carry?
About 14,965 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is US 12 / Heron ST over Wishkah River?
The structure is 235 ft (71.6 m) long with a longest span of 93 ft (28.3 m) and a deck 30 ft wide.
Who owns US 12 / Heron ST over Wishkah River?
It is owned by the State Highway Agency.