Lyman Hamilton HWY over Muddy Creek
GoodSkagit County, Washington · 0.3 M W Hamilton · Structure no. 086311000000000
- Built
- 1955
- 70 years old, rebuilt 1997
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 65 ft
- 1 main span
- Daily traffic
- 198
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Lyman Hamilton HWY over Muddy Creek is a prestressed concrete stringer/multi-beam or girder carrying Lyman Hamilton HWY over Muddy Creek in Skagit County, Washington. It was built in 1955 and reconstructed in 1997, so it is 70 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 198 vehicles a day, roughly 4% of them trucks, projected to reach 293 by 2040. The structure is 65 ft (19.8 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Lyman Hamilton HWY over Muddy Creek built?
It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1997.
What condition is Lyman Hamilton HWY over Muddy Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.
How much traffic does Lyman Hamilton HWY over Muddy Creek carry?
About 198 vehicles per day (2020 count), of which roughly 4% are trucks.
How long is Lyman Hamilton HWY over Muddy Creek?
The structure is 65 ft (19.8 m) long with a longest span of 63 ft (19.2 m) and a deck 33 ft wide.
Who owns Lyman Hamilton HWY over Muddy Creek?
It is owned by the County Highway Agency.