US Bridges

Wisconsin Avenue over Bethesda Metro Ped. Tunn

Good

Montgomery County, Maryland · 70 Ft South of Md 410 · Structure no. 200000M-0355020

Built
1984
41 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete
Length
35 ft
Daily traffic
29,515
2025 count
Owner
County
County Highway Agency

About this bridge

Wisconsin Avenue over Bethesda Metro Ped. Tunn is a concrete culvert carrying Wisconsin Avenue over Bethesda Metro Ped. Tunn in Montgomery 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 29,515 vehicles a day, roughly 2% of them trucks, projected to reach 32,611 by 2045. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesWisconsin Avenue
CrossesBethesda Metro Ped. Tunn
Location70 Ft South of Md 410
RouteState Highway 355
CountyMontgomery County
StateMaryland
Coordinates38.9845, -77.09448
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans0
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span35 ft (10.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,515 (2025)
Projected traffic32,611 by 2045
Trucks2%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesPedestrian / bicycle
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Wisconsin Avenue over Bethesda Metro Ped. Tunn built?

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

What condition is Wisconsin Avenue over Bethesda Metro Ped. Tunn in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does Wisconsin Avenue over Bethesda Metro Ped. Tunn carry?

About 29,515 vehicles per day (2025 count), of which roughly 2% are trucks.

How long is Wisconsin Avenue over Bethesda Metro Ped. Tunn?

The structure is 35 ft (10.7 m) long with a longest span of 35 ft (10.7 m).

Who owns Wisconsin Avenue over Bethesda Metro Ped. Tunn?

It is owned by the County Highway Agency.