US Bridges

Mantua Mill Road over Western Run

Fair

Baltimore County, Maryland · 0.07 MI E of Md 128 · Structure no. 200000B-0181010

Built
1986
39 years old
Condition
Fair
inspected June 2023
Type
Truss - Thru
Steel
Length
63 ft
1 main span
Daily traffic
450
2021 count
Owner
County
County Highway Agency

About this bridge

Mantua Mill Road over Western Run is a steel truss - thru carrying Mantua Mill Road over Western Run in Baltimore County, Maryland. It was built in 1986, so it is 39 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 450 vehicles a day, roughly 5% of them trucks, projected to reach 1,200 by 2050. The structure is 63 ft (19.2 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesMantua Mill Road
CrossesWestern Run
Location0.07 MI E of Md 128
RouteCounty Highway 189
CountyBaltimore County
StateMaryland
Coordinates39.51385, -76.76685
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.9 US tons
Inventory rating37.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckSteel plate
Main spans1
Design loadHS 20
Structure length63 ft (19.2 m)
Longest span61 ft (18.6 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2021)
Projected traffic1,200 by 2050
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$22,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mantua Mill Road over Western Run built?

It was built in 1986, making it 39 years old in 2025.

What condition is Mantua Mill Road over Western 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 June 2023.

How much traffic does Mantua Mill Road over Western Run carry?

About 450 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Mantua Mill Road over Western Run?

The structure is 63 ft (19.2 m) long with a longest span of 61 ft (18.6 m) and a deck 29 ft wide.

Who owns Mantua Mill Road over Western Run?

It is owned by the County Highway Agency.