US Bridges

T-418 Beaver Dam over Muddy Creek

Fair

Butler County, Pennsylvania · 0.5 Miles NW of S.R. 4002 · Structure no. 000000000008184

Built
1940
85 years old, rebuilt 2008
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
100
2013 count
Owner
County
County Highway Agency

About this bridge

T-418 Beaver Dam over Muddy Creek is a steel stringer/multi-beam or girder carrying T-418 Beaver Dam over Muddy Creek in Butler County, Pennsylvania. It was built in 1940 and reconstructed in 2008, so it is 85 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 100 vehicles a day, roughly 9% of them trucks, projected to reach 120 by 2033. The structure is 32 ft (9.8 m) long and 19 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesT-418 Beaver Dam
CrossesMuddy Creek
Location0.5 Miles NW of S.R. 4002
RouteCity Street 0
CountyButler County
StatePennsylvania
Coordinates40.96689, -79.9375
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width19 ft (5.8 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2013)
Projected traffic120 by 2033
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was T-418 Beaver Dam over Muddy Creek built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2008.

What condition is T-418 Beaver Dam over Muddy Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does T-418 Beaver Dam over Muddy Creek carry?

About 100 vehicles per day (2013 count), of which roughly 9% are trucks.

How long is T-418 Beaver Dam over Muddy Creek?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 19 ft wide.

Who owns T-418 Beaver Dam over Muddy Creek?

It is owned by the County Highway Agency.