US Bridges

Md 80 over Monocacy River

Fair

Frederick County, Maryland · 0.08 Mile East of Md 880 · Structure no. 100000100059010

Built
1973
52 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
500 ft
7 main spans
Daily traffic
4,472
2009 count
Owner
State
State Highway Agency

About this bridge

Md 80 over Monocacy River is a steel continuous stringer/multi-beam or girder carrying Md 80 over Monocacy River in Frederick County, Maryland. It was built in 1973, so it is 52 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 5 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 4,472 vehicles a day, roughly 8% of them trucks, projected to reach 4,061 by 2026. The structure is 500 ft (152.4 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesMd 80
CrossesMonocacy River
Location0.08 Mile East of Md 880
RouteState Highway 80
Coordinates39.32569, -77.4145
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionMay 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating44 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length500 ft (152.4 m)
Longest span75 ft (22.9 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,472 (2009)
Projected traffic4,061 by 2026
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 80 over Monocacy River built?

It was built in 1973, making it 52 years old in 2025.

What condition is Md 80 over Monocacy River 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 May 2024.

How much traffic does Md 80 over Monocacy River carry?

About 4,472 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 80 over Monocacy River?

The structure is 500 ft (152.4 m) long with a longest span of 75 ft (22.9 m) and a deck 31 ft wide.

Who owns Md 80 over Monocacy River?

It is owned by the State Highway Agency.