US Bridges

Md 85 over Rocky Fountain Run

Fair

Frederick County, Maryland · 0.03 Mile North of Md 880 · Structure no. 100000100013010

Built
1929
96 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
6,713
2018 count
Owner
State
State Highway Agency

About this bridge

Md 85 over Rocky Fountain Run is a concrete slab carrying Md 85 over Rocky Fountain Run in Frederick County, Maryland. It was built in 1929, so it is 96 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 6,713 vehicles a day, roughly 8% of them trucks, projected to reach 6,753 by 2038. The structure is 26 ft (7.9 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesMd 85
CrossesRocky Fountain Run
Location0.03 Mile North of Md 880
RouteState Highway 85
CountyFrederick County
StateMaryland
Coordinates39.33282, -77.4322
Functional classUrban Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.5 US tons
Inventory rating37.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span23 ft (7 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,713 (2018)
Projected traffic6,753 by 2038
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$46,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 85 over Rocky Fountain Run built?

It was built in 1929, making it 96 years old in 2025.

What condition is Md 85 over Rocky Fountain 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 April 2023.

How much traffic does Md 85 over Rocky Fountain Run carry?

About 6,713 vehicles per day (2018 count), of which roughly 8% are trucks.

How long is Md 85 over Rocky Fountain Run?

The structure is 26 ft (7.9 m) long with a longest span of 23 ft (7 m) and a deck 27 ft wide.

Who owns Md 85 over Rocky Fountain Run?

It is owned by the State Highway Agency.