US Bridges

US 50 WB over Big Mill Pond

Fair

Dorchester County, Maryland · 3.21 Miles West of Md 331 · Structure no. 100000090006010

Built
1996
29 years old
Condition
Fair
inspected April 2023
Type
Slab
Prestressed Concrete
Length
115 ft
2 main spans
Daily traffic
23,981
2023 count
Owner
State
State Highway Agency

About this bridge

US 50 WB over Big Mill Pond is a prestressed concrete slab carrying US 50 WB over Big Mill Pond in Dorchester County, Maryland. It was built in 1996, so it is 29 years old, younger than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 23,981 vehicles a day, roughly 11% of them trucks, projected to reach 32,299 by 2043. The structure is 115 ft (35.1 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 50 WB
CrossesBig Mill Pond
Location3.21 Miles West of Md 331
RouteU.S. Route 50
Coordinates38.51177, -75.87965
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.9 US tons
Inventory rating46.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length115 ft (35.1 m)
Longest span55 ft (16.8 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,981 (2023)
Projected traffic32,299 by 2043
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$290,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 50 WB over Big Mill Pond built?

It was built in 1996, making it 29 years old in 2025.

What condition is US 50 WB over Big Mill Pond 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 April 2023.

How much traffic does US 50 WB over Big Mill Pond carry?

About 23,981 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US 50 WB over Big Mill Pond?

The structure is 115 ft (35.1 m) long with a longest span of 55 ft (16.8 m) and a deck 42 ft wide.

Who owns US 50 WB over Big Mill Pond?

It is owned by the State Highway Agency.