US Bridges

Silver Knob Road over Youghiogheny River

Fair

Garrett County, Maryland · 0.1 M SE Int Underwood RD · Structure no. 200000G-0011010

Built
1984
41 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
324
2021 count
Owner
County
County Highway Agency

About this bridge

Silver Knob Road over Youghiogheny River is a steel stringer/multi-beam or girder carrying Silver Knob Road over Youghiogheny River in Garrett County, Maryland. It was built in 1984, so it is 41 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 324 vehicles a day, roughly 5% of them trucks, projected to reach 400 by 2041. The structure is 57 ft (17.3 m) long and 20 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesSilver Knob Road
CrossesYoughiogheny River
Location0.1 M SE Int Underwood RD
RouteCounty Highway 369
CountyGarrett County
StateMaryland
Coordinates39.35746, -79.47608
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75.9 US tons
Inventory rating45.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length57 ft (17.3 m)
Longest span55 ft (16.8 m)
Deck width20 ft (6 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic324 (2021)
Projected traffic400 by 2041
Trucks5%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$63,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Silver Knob Road over Youghiogheny River built?

It was built in 1984, making it 41 years old in 2025.

What condition is Silver Knob Road over Youghiogheny River 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 Silver Knob Road over Youghiogheny River carry?

About 324 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Silver Knob Road over Youghiogheny River?

The structure is 57 ft (17.3 m) long with a longest span of 55 ft (16.8 m) and a deck 20 ft wide.

Who owns Silver Knob Road over Youghiogheny River?

It is owned by the County Highway Agency.