US Bridges

Md 806A over High Run

Fair

Frederick County, Maryland · 0.41 Mile North of US 15G · Structure no. 100000100006010

Built
1950
75 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Concrete
Length
23 ft
1 main span
Daily traffic
1,072
2009 count
Owner
State
State Highway Agency

About this bridge

Md 806A over High Run is a concrete tee beam carrying Md 806A over High Run in Frederick County, Maryland. It was built in 1950, so it is 75 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 1,072 vehicles a day, roughly 8% of them trucks, projected to reach 1,317 by 2026. The structure is 23 ft (7 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMd 806A
CrossesHigh Run
Location0.41 Mile North of US 15G
RouteState Highway 806A
CountyFrederick County
StateMaryland
Coordinates39.60757, -77.42078
Functional classUrban Local

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating62.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width24 ft (7.2 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,072 (2009)
Projected traffic1,317 by 2026
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$36,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 806A over High Run built?

It was built in 1950, making it 75 years old in 2025.

What condition is Md 806A over High Run 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 October 2024.

How much traffic does Md 806A over High Run carry?

About 1,072 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 806A over High Run?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 24 ft wide.

Who owns Md 806A over High Run?

It is owned by the State Highway Agency.