US Bridges

US 15 Sbr over Rosemont Ave

Fair

Frederick County, Maryland · 0.77 Mile North of US 40 · Structure no. 100000100100012

Built
1968
57 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
139 ft
3 main spans
Daily traffic
93,930
2009 count
Owner
State
State Highway Agency

About this bridge

US 15 Sbr over Rosemont Ave is a steel stringer/multi-beam or girder carrying US 15 Sbr over Rosemont Ave in Frederick County, Maryland. It was built in 1968, so it is 57 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 8% of them trucks, projected to reach 133,130 by 2029. The structure is 139 ft (42.4 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 15 Sbr
CrossesRosemont Ave
Location0.77 Mile North of US 40
RouteU.S. Route 15
CountyFrederick County
StateMaryland
Coordinates39.42461, -77.42715
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length139 ft (42.4 m)
Longest span69 ft (21 m)
Deck width50 ft (15.1 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic93,930 (2009)
Projected traffic133,130 by 2029
Trucks8%
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 15 Sbr over Rosemont Ave built?

It was built in 1968, making it 57 years old in 2025.

What condition is US 15 Sbr 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 Sbr over Rosemont Ave carry?

About 93,930 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is US 15 Sbr over Rosemont Ave?

The structure is 139 ft (42.4 m) long with a longest span of 69 ft (21 m) and a deck 50 ft wide.

Who owns US 15 Sbr over Rosemont Ave?

It is owned by the State Highway Agency.