US Bridges

Rock Hill Road over Unnamed Stream

FairPosted for load

Washington County, Maryland · 0.22 MI SW of Is 70+MD 63 · Structure no. 200000W-2127010

Built
1920
105 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
778
2023 count
Owner
County
County Highway Agency

About this bridge

Rock Hill Road over Unnamed Stream is a concrete slab carrying Rock Hill Road over Unnamed Stream in Washington County, Maryland. It was built in 1920, so it is 105 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. Its operating status is: posted for load restriction.

It carries about 778 vehicles a day, roughly 5% of them trucks, projected to reach 1,338 by 2043. The structure is 24 ft (7.3 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesRock Hill Road
CrossesUnnamed Stream
Location0.22 MI SW of Is 70+MD 63
RouteCounty Highway 970
CountyWashington County
StateMaryland
Coordinates39.62758, -77.81189
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.5 US tons
Inventory rating38 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span21 ft (6.4 m)
Deck width24 ft (7.4 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic778 (2023)
Projected traffic1,338 by 2043
Trucks5%
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 statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rock Hill Road over Unnamed Stream built?

It was built in 1920, making it 105 years old in 2025.

What condition is Rock Hill Road over Unnamed Stream 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 November 2023.

How much traffic does Rock Hill Road over Unnamed Stream carry?

About 778 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Rock Hill Road over Unnamed Stream?

The structure is 24 ft (7.3 m) long with a longest span of 21 ft (6.4 m) and a deck 24 ft wide.

Who owns Rock Hill Road over Unnamed Stream?

It is owned by the County Highway Agency.