US Bridges

Cobblestone Road over Jennings Run

Fair

Allegany County, Maryland · 0.04 MI S of Md 36 · Structure no. 200000A-0059010

Built
1940
85 years old, rebuilt 2018
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
58 ft
1 main span
Daily traffic
286
2022 count
Owner
County
County Highway Agency

About this bridge

Cobblestone Road over Jennings Run is a steel stringer/multi-beam or girder carrying Cobblestone Road over Jennings Run in Allegany County, Maryland. It was built in 1940 and reconstructed in 2018, so it is 85 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 286 vehicles a day, roughly 2% of them trucks, projected to reach 351 by 2042. The structure is 58 ft (17.6 m) long and 14 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesCobblestone Road
CrossesJennings Run
Location0.04 MI S of Md 36
RouteCounty Highway 200
CountyAllegany County
StateMaryland
Coordinates39.69519, -78.87634
Functional classUrban 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length58 ft (17.6 m)
Longest span56 ft (17.1 m)
Deck width14 ft (4.4 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic286 (2022)
Projected traffic351 by 2042
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Cobblestone Road over Jennings Run built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2018.

What condition is Cobblestone Road over Jennings 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 2024.

How much traffic does Cobblestone Road over Jennings Run carry?

About 286 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Cobblestone Road over Jennings Run?

The structure is 58 ft (17.6 m) long with a longest span of 56 ft (17.1 m) and a deck 14 ft wide.

Who owns Cobblestone Road over Jennings Run?

It is owned by the County Highway Agency.