US Bridges

US 15 Nbr over Rosemont Ave

Fair

Frederick County, Maryland · 0.77 Mile North of US 40 · Structure no. 100000100100011

Built
1958
67 years old, rebuilt 1992
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
138 ft
3 main spans
Daily traffic
93,930
2009 count
Owner
State
State Highway Agency

About this bridge

US 15 Nbr over Rosemont Ave is a steel stringer/multi-beam or girder carrying US 15 Nbr over Rosemont Ave in Frederick County, Maryland. It was built in 1958 and reconstructed in 1992, so it is 67 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 93,930 vehicles a day, roughly 11% of them trucks, projected to reach 133,130 by 2029. The structure is 138 ft (42.1 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 15 Nbr
CrossesRosemont Ave
Location0.77 Mile North of US 40
RouteU.S. Route 15
CountyFrederick County
StateMaryland
Coordinates39.42426, -77.42735
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.9 US tons
Inventory rating54 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length138 ft (42.1 m)
Longest span70 ft (21.3 m)
Deck width48 ft (14.5 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic93,930 (2009)
Projected traffic133,130 by 2029
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$432,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 15 Nbr over Rosemont Ave built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1992.

What condition is US 15 Nbr over Rosemont Ave 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 2024.

How much traffic does US 15 Nbr over Rosemont Ave carry?

About 93,930 vehicles per day (2009 count), of which roughly 11% are trucks.

How long is US 15 Nbr over Rosemont Ave?

The structure is 138 ft (42.1 m) long with a longest span of 70 ft (21.3 m) and a deck 48 ft wide.

Who owns US 15 Nbr over Rosemont Ave?

It is owned by the State Highway Agency.