US Bridges

Oak Farm Road over Mill Brook

FairPosted for load

Harford County, Maryland · 0.4 Mil E of Glenville RD · Structure no. 200000H-0198010

Built
1988
37 years old, rebuilt 2021
Condition
Fair
inspected July 2023
Type
Slab
Wood or Timber
Length
32 ft
1 main span
Daily traffic
102
2020 count
Owner
County
County Highway Agency

About this bridge

Oak Farm Road over Mill Brook is a wood or timber slab carrying Oak Farm Road over Mill Brook in Harford County, Maryland. It was built in 1988 and reconstructed in 2021, so it is 37 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. Its operating status is: posted for load restriction.

It carries about 102 vehicles a day, roughly 5% of them trucks, projected to reach 128 by 2040. The structure is 32 ft (9.8 m) long and 26 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesOak Farm Road
CrossesMill Brook
Location0.4 Mil E of Glenville RD
RouteCounty Highway 1878
CountyHarford County
StateMaryland
Coordinates39.57246, -76.23069
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating27.4 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic102 (2020)
Projected traffic128 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Oak Farm Road over Mill Brook built?

It was built in 1988, making it 37 years old in 2025. It was reconstructed in 2021.

What condition is Oak Farm Road over Mill Brook 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 July 2023.

How much traffic does Oak Farm Road over Mill Brook carry?

About 102 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Oak Farm Road over Mill Brook?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 26 ft wide.

Who owns Oak Farm Road over Mill Brook?

It is owned by the County Highway Agency.