US Bridges

Snowden Run Road over Snowden Run

Fair

Carroll County, Maryland · 1.89 MI W of Mineral Hill · Structure no. 200000CL0335020

Built
1974
51 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
22 ft
Daily traffic
503
2021 count
Owner
County
County Highway Agency

About this bridge

Snowden Run Road over Snowden Run is a concrete culvert carrying Snowden Run Road over Snowden Run in Carroll County, Maryland. It was built in 1974, so it is 51 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 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 503 vehicles a day, roughly 8% of them trucks, projected to reach 830 by 2041. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesSnowden Run Road
CrossesSnowden Run
Location1.89 MI W of Mineral Hill
RouteCounty Highway 712
CountyCarroll County
StateMaryland
Coordinates39.40844, -76.91391
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
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
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41 US tons
Inventory rating24.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans0
Design loadH 20
Structure length22 ft (6.7 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic503 (2021)
Projected traffic830 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Snowden Run Road over Snowden Run built?

It was built in 1974, making it 51 years old in 2025.

What condition is Snowden Run Road over Snowden 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 August 2023.

How much traffic does Snowden Run Road over Snowden Run carry?

About 503 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Snowden Run Road over Snowden Run?

The structure is 22 ft (6.7 m) long with a longest span of 9 ft (2.7 m).

Who owns Snowden Run Road over Snowden Run?

It is owned by the County Highway Agency.