US Bridges

Longnecker Road over Slade Run

Fair

Baltimore County, Maryland · 0.74 MI N of Md 128 · Structure no. 200000B-0163010

Built
1920
105 years old, rebuilt 1988
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
27 ft
1 main span
Daily traffic
315
2023 count
Owner
County
County Highway Agency

About this bridge

Longnecker Road over Slade Run is a prestressed concrete box beam or girders - multiple carrying Longnecker Road over Slade Run in Baltimore County, Maryland. It was built in 1920 and reconstructed in 1988, so it is 105 years old, older 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 315 vehicles a day, roughly 5% of them trucks, projected to reach 416 by 2043. The structure is 27 ft (8.2 m) long and 22 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLongnecker Road
CrossesSlade Run
Location0.74 MI N of Md 128
RouteCounty Highway 445
CountyBaltimore County
StateMaryland
Coordinates39.49544, -76.79513
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating77.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span27 ft (8.2 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic315 (2023)
Projected traffic416 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Longnecker Road over Slade Run built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1988.

What condition is Longnecker Road over Slade Run 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 Longnecker Road over Slade Run carry?

About 315 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Longnecker Road over Slade Run?

The structure is 27 ft (8.2 m) long with a longest span of 27 ft (8.2 m) and a deck 22 ft wide.

Who owns Longnecker Road over Slade Run?

It is owned by the County Highway Agency.