US Bridges

Island Street over Jackson Run

Good

Allegany County, Maryland · 0.03 MI W of Railroad Ave · Structure no. 200000A-L-04010

Built
1940
85 years old, rebuilt 2000
Condition
Good
inspected September 2023
Type
Slab
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
337
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Island Street over Jackson Run is a prestressed concrete slab carrying Island Street over Jackson Run in Allegany County, Maryland. It was built in 1940 and reconstructed in 2000, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 337 vehicles a day, roughly 5% of them trucks, projected to reach 411 by 2039. The structure is 30 ft (9.1 m) long and 14 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesIsland Street
CrossesJackson Run
Location0.03 MI W of Railroad Ave
RouteCity Street 140
Coordinates39.56479, -78.98133
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.9 US tons
Inventory rating54 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic337 (2019)
Projected traffic411 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$8,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Island Street over Jackson Run built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2000.

What condition is Island Street over Jackson Run in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does Island Street over Jackson Run carry?

About 337 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Island Street over Jackson Run?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 14 ft wide.

Who owns Island Street over Jackson Run?

It is owned by the City or Municipal Highway Agency.