US Bridges

Md 550 over Trib to Lake Royer

Fair

Washington County, Maryland · 0.42 Mile North of Md 491 · Structure no. 100000210040020

Built
1945
80 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
108 ft
Daily traffic
1,630
2006 count
Owner
State
State Highway Agency

About this bridge

Md 550 over Trib to Lake Royer is a concrete culvert carrying Md 550 over Trib to Lake Royer in Washington County, Maryland. It was built in 1945, so it is 80 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 1,630 vehicles a day, roughly 8% of them trucks, projected to reach 1,879 by 2026. The structure is 108 ft (32.9 m) long. If it were closed, the detour would be 6.2 mi (10 km).

CarriesMd 550
CrossesTrib to Lake Royer
Location0.42 Mile North of Md 491
RouteState Highway 550
Coordinates39.71232, -77.49481
Functional classUrban Minor Arterial

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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans0
Design loadH 20
Structure length108 ft (32.9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck14 ft (4.3 m)

Traffic and service

Average daily traffic1,630 (2006)
Projected traffic1,879 by 2026
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 550 over Trib to Lake Royer built?

It was built in 1945, making it 80 years old in 2025.

What condition is Md 550 over Trib to Lake Royer 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 April 2023.

How much traffic does Md 550 over Trib to Lake Royer carry?

About 1,630 vehicles per day (2006 count), of which roughly 8% are trucks.

How long is Md 550 over Trib to Lake Royer?

The structure is 108 ft (32.9 m) long with a longest span of 12 ft (3.7 m).

Who owns Md 550 over Trib to Lake Royer?

It is owned by the State Highway Agency.