US Bridges

Unger Road over Grove Creek

Fair

Washington County, Maryland · 0.5 MI SW of Leit Smith R · Structure no. 200000W-2384010

Built
1830
195 years old, rebuilt 1997
Condition
Fair
inspected October 2023
Type
Slab
Concrete
Length
22 ft
2 main spans
Daily traffic
194
2023 count
Owner
County
County Highway Agency

About this bridge

Unger Road over Grove Creek is a concrete slab carrying Unger Road over Grove Creek in Washington County, Maryland. It was built in 1830 and reconstructed in 1997, so it is 195 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 194 vehicles a day, roughly 3% of them trucks, projected to reach 353 by 2045. The structure is 22 ft (6.7 m) long and 13 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUnger Road
CrossesGrove Creek
Location0.5 MI SW of Leit Smith R
RouteCounty Highway 236
CountyWashington County
StateMaryland
Coordinates39.6683, -77.60678
Functional classRural 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 protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69 US tons
Inventory rating41.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width13 ft (3.9 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic194 (2023)
Projected traffic353 by 2045
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Unger Road over Grove Creek built?

It was built in 1830, making it 195 years old in 2025. It was reconstructed in 1997.

What condition is Unger Road over Grove Creek 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 2023.

How much traffic does Unger Road over Grove Creek carry?

About 194 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Unger Road over Grove Creek?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 13 ft wide.

Who owns Unger Road over Grove Creek?

It is owned by the County Highway Agency.