US Bridges

Md 128 over Slade Run

Fair

Baltimore County, Maryland · 3.05 MI E of Md 30 · Structure no. 100000030070010

Built
1990
35 years old
Condition
Fair
inspected August 2023
Type
Slab
Prestressed Concrete
Length
38 ft
1 main span
Daily traffic
2,991
2009 count
Owner
State
State Highway Agency

About this bridge

Md 128 over Slade Run is a prestressed concrete slab carrying Md 128 over Slade Run in Baltimore County, Maryland. It was built in 1990, so it is 35 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 2,991 vehicles a day, roughly 8% of them trucks, projected to reach 3,403 by 2026. The structure is 38 ft (11.6 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

No coordinates are recorded for this structure.

CarriesMd 128
CrossesSlade Run
Location3.05 MI E of Md 30
RouteState Highway 128
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.5 US tons
Inventory rating42.4 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span33 ft (10.1 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,991 (2009)
Projected traffic3,403 by 2026
Trucks8%
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

OwnerState Highway Agency
Maintained byState 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 Md 128 over Slade Run built?

It was built in 1990, making it 35 years old in 2025.

What condition is Md 128 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 August 2023.

How much traffic does Md 128 over Slade Run carry?

About 2,991 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 128 over Slade Run?

The structure is 38 ft (11.6 m) long with a longest span of 33 ft (10.1 m) and a deck 32 ft wide.

Who owns Md 128 over Slade Run?

It is owned by the State Highway Agency.