US Bridges

Hartley Mill Road over Long Green Creek

Fair

Baltimore County, Maryland · 0.2 MI SE of Glen Arm RD · Structure no. 200000B-0041010

Built
1988
37 years old
Condition
Fair
inspected August 2023
Type
Truss - Thru
Steel
Length
61 ft
1 main span
Daily traffic
1,841
2023 count
Owner
County
County Highway Agency

About this bridge

Hartley Mill Road over Long Green Creek is a steel truss - thru carrying Hartley Mill Road over Long Green Creek in Baltimore County, Maryland. It was built in 1988, 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.

It carries about 1,841 vehicles a day, roughly 5% of them trucks, projected to reach 2,246 by 2043. The structure is 61 ft (18.6 m) long and 13 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesHartley Mill Road
CrossesLong Green Creek
Location0.2 MI SE of Glen Arm RD
RouteCounty Highway 3886
CountyBaltimore County
StateMaryland
Coordinates39.45569, -76.47937
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating48.5 US tons
Inventory rating29 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckSteel plate
Main spans1
Design loadHS 20
Structure length61 ft (18.6 m)
Longest span61 ft (18.6 m)
Deck width13 ft (4.1 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,841 (2023)
Projected traffic2,246 by 2043
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.6 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Hartley Mill Road over Long Green Creek built?

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

What condition is Hartley Mill Road over Long Green Creek 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 Hartley Mill Road over Long Green Creek carry?

About 1,841 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Hartley Mill Road over Long Green Creek?

The structure is 61 ft (18.6 m) long with a longest span of 61 ft (18.6 m) and a deck 13 ft wide.

Who owns Hartley Mill Road over Long Green Creek?

It is owned by the County Highway Agency.