US Bridges

Boyers Mill Road over Lake Linganore

Good

Frederick County, Maryland · 1.8 MI S of Gas House Pk · Structure no. 200000F-1301010

Built
2017
8 years old
Condition
Good
inspected July 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
307 ft
2 main spans
Daily traffic
5,776
2023 count
Owner
County
County Highway Agency

About this bridge

Boyers Mill Road over Lake Linganore is a prestressed concrete continuous tee beam carrying Boyers Mill Road over Lake Linganore in Frederick County, Maryland. It was built in 2017, so it is 8 years old, younger 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 5,776 vehicles a day, roughly 10% of them trucks, projected to reach 709 by 2045. The structure is 307 ft (93.7 m) long and 41 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesBoyers Mill Road
CrossesLake Linganore
Location1.8 MI S of Gas House Pk
RouteCounty Highway 412
Coordinates39.41578, -77.30425
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating38.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length307 ft (93.7 m)
Longest span150 ft (45.7 m)
Deck width41 ft (12.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,776 (2023)
Projected traffic709 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 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 Boyers Mill Road over Lake Linganore built?

It was built in 2017, making it 8 years old in 2025.

What condition is Boyers Mill Road over Lake Linganore 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 July 2023.

How much traffic does Boyers Mill Road over Lake Linganore carry?

About 5,776 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Boyers Mill Road over Lake Linganore?

The structure is 307 ft (93.7 m) long with a longest span of 150 ft (45.7 m) and a deck 41 ft wide.

Who owns Boyers Mill Road over Lake Linganore?

It is owned by the County Highway Agency.