US Bridges

Md 363 over S Branch of Rock Creek

Fair

Somerset County, Maryland · 0.21 M E of Earl Webst RD · Structure no. 100000190007010

Built
1977
48 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
75 ft
5 main spans
Daily traffic
2,245
2023 count
Owner
State
State Highway Agency

About this bridge

Md 363 over S Branch of Rock Creek is a wood or timber stringer/multi-beam or girder carrying Md 363 over S Branch of Rock Creek in Somerset County, Maryland. It was built in 1977, so it is 48 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 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 2,245 vehicles a day, roughly 8% of them trucks, projected to reach 4,360 by 2045. The structure is 75 ft (22.9 m) long and 41 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesMd 363
CrossesS Branch of Rock Creek
Location0.21 M E of Earl Webst RD
RouteState Highway 363
CountySomerset County
StateMaryland
Coordinates38.17855, -75.92392
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.4 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans5
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span15 ft (4.6 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,245 (2023)
Projected traffic4,360 by 2045
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

OwnerState Highway Agency
Maintained byState 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 Md 363 over S Branch of Rock Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Md 363 over S Branch of Rock 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 February 2023.

How much traffic does Md 363 over S Branch of Rock Creek carry?

About 2,245 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Md 363 over S Branch of Rock Creek?

The structure is 75 ft (22.9 m) long with a longest span of 15 ft (4.6 m) and a deck 41 ft wide.

Who owns Md 363 over S Branch of Rock Creek?

It is owned by the State Highway Agency.