US Bridges

Deep Run Road over Deep Run

Fair

Carroll County, Maryland · 0.2 E Old Hanover Road · Structure no. 200000CL0279020

Built
1978
47 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
44 ft
3 main spans
Daily traffic
942
2021 count
Owner
County
County Highway Agency

About this bridge

Deep Run Road over Deep Run is a concrete culvert carrying Deep Run Road over Deep Run in Carroll County, Maryland. It was built in 1978, so it is 47 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 942 vehicles a day, roughly 8% of them trucks, projected to reach 1,544 by 2041. The structure is 44 ft (13.3 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesDeep Run Road
CrossesDeep Run
Location0.2 E Old Hanover Road
RouteCounty Highway 921
CountyCarroll County
StateMaryland
Coordinates39.66885, -77.01098
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.5 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length44 ft (13.3 m)
Longest span14 ft (4.3 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic942 (2021)
Projected traffic1,544 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Deep Run Road over Deep Run built?

It was built in 1978, making it 47 years old in 2025.

What condition is Deep Run Road over Deep 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 May 2023.

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

About 942 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Deep Run Road over Deep Run?

The structure is 44 ft (13.3 m) long with a longest span of 14 ft (4.3 m) and a deck 37 ft wide.

Who owns Deep Run Road over Deep Run?

It is owned by the County Highway Agency.