US Bridges

Biggs Ford Road over Monocacy River

Fair

Frederick County, Maryland · 0.55 MI E of US RTE 15 · Structure no. 200000F-2604010

Built
1970
55 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
500 ft
7 main spans
Daily traffic
6,393
2018 count
Owner
County
County Highway Agency

About this bridge

Biggs Ford Road over Monocacy River is a steel continuous stringer/multi-beam or girder carrying Biggs Ford Road over Monocacy River in Frederick County, Maryland. It was built in 1970, so it is 55 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 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 6,393 vehicles a day, roughly 15% of them trucks, projected to reach 11,763 by 2038. The structure is 500 ft (152.4 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesBiggs Ford Road
CrossesMonocacy River
Location0.55 MI E of US RTE 15
RouteCounty Highway 475
CountyFrederick County
StateMaryland
Coordinates39.48031, -77.38896
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating57.5 US tons
Inventory rating34.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length500 ft (152.4 m)
Longest span75 ft (22.9 m)
Deck width40 ft (12.3 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,393 (2018)
Projected traffic11,763 by 2038
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Biggs Ford Road over Monocacy River built?

It was built in 1970, making it 55 years old in 2025.

What condition is Biggs Ford Road 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 April 2024.

How much traffic does Biggs Ford Road over Monocacy River carry?

About 6,393 vehicles per day (2018 count), of which roughly 15% are trucks.

How long is Biggs Ford Road 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 40 ft wide.

Who owns Biggs Ford Road over Monocacy River?

It is owned by the County Highway Agency.