US Bridges

Md 355 over CSX Trans Mu 681 Mu 77

Fair

Montgomery County, Maryland · 0.19 M S of Brooks Avenue · Structure no. 100000150056010

Built
1987
38 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
398 ft
4 main spans
Daily traffic
34,970
2009 count
Owner
State
State Highway Agency

About this bridge

Md 355 over CSX Trans Mu 681 Mu 77 is a steel continuous stringer/multi-beam or girder carrying Md 355 over CSX Trans Mu 681 Mu 77 in Montgomery County, Maryland. It was built in 1987, so it is 38 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 34,970 vehicles a day, roughly 8% of them trucks, projected to reach 41,750 by 2026. The structure is 398 ft (121.3 m) long and 92 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesMd 355
CrossesCSX Trans Mu 681 Mu 77
Location0.19 M S of Brooks Avenue
RouteState Highway 355
CountyMontgomery County
StateMaryland
Coordinates39.14108, -77.19846
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.9 US tons
Inventory rating46.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length398 ft (121.3 m)
Longest span122 ft (37.2 m)
Deck width92 ft (28.1 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,970 (2009)
Projected traffic41,750 by 2026
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.8 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Md 355 over CSX Trans Mu 681 Mu 77 built?

It was built in 1987, making it 38 years old in 2025.

What condition is Md 355 over CSX Trans Mu 681 Mu 77 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 355 over CSX Trans Mu 681 Mu 77 carry?

About 34,970 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 355 over CSX Trans Mu 681 Mu 77?

The structure is 398 ft (121.3 m) long with a longest span of 122 ft (37.2 m) and a deck 92 ft wide.

Who owns Md 355 over CSX Trans Mu 681 Mu 77?

It is owned by the State Highway Agency.