Mattiss Mil T-550 over Wiconisco Creek
GoodDauphin County, Pennsylvania · Washington Township · Structure no. 000000000045499
- Built
- 2009
- 16 years old
- Condition
- Good
- inspected July 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 82 ft
- 1 main span
- Daily traffic
- 50
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Mattiss Mil T-550 over Wiconisco Creek is a prestressed concrete box beam or girders - multiple carrying Mattiss Mil T-550 over Wiconisco Creek in Dauphin County, Pennsylvania. It was built in 2009, so it is 16 years old, younger than the Pennsylvania average of 54.8 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 50 vehicles a day, roughly 1% of them trucks, projected to reach 74 by 2043. The structure is 82 ft (25 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 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 | 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 Mattiss Mil T-550 over Wiconisco Creek built?
It was built in 2009, making it 16 years old in 2025.
What condition is Mattiss Mil T-550 over Wiconisco 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 July 2023.
How much traffic does Mattiss Mil T-550 over Wiconisco Creek carry?
About 50 vehicles per day (2023 count), of which roughly 1% are trucks.
How long is Mattiss Mil T-550 over Wiconisco Creek?
The structure is 82 ft (25 m) long with a longest span of 80 ft (24.4 m) and a deck 31 ft wide.
Who owns Mattiss Mil T-550 over Wiconisco Creek?
It is owned by the County Highway Agency.