US Bridges

Seven Locks Road over Cabin John Creek Tributa

Poor

Montgomery County, Maryland · 0.5 Miles North of Md 191 · Structure no. 200000M-0432030

Built
1965
60 years old
Condition
Poor
inspected February 2024
Type
Culvert
Steel
Length
22 ft
Daily traffic
18,184
2022 count
Owner
County
County Highway Agency

About this bridge

Seven Locks Road over Cabin John Creek Tributa is a steel culvert carrying Seven Locks Road over Cabin John Creek Tributa in Montgomery County, Maryland. It was built in 1965, so it is 60 years old, older than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 18,184 vehicles a day, roughly 5% of them trucks, projected to reach 20,003 by 2042. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSeven Locks Road
CrossesCabin John Creek Tributa
Location0.5 Miles North of Md 191
RouteCounty Highway 148
CountyMontgomery County
StateMaryland
Coordinates39.01894, -77.16106
Functional classUrban Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans0
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,184 (2022)
Projected traffic20,003 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Seven Locks Road over Cabin John Creek Tributa built?

It was built in 1965, making it 60 years old in 2025.

What condition is Seven Locks Road over Cabin John Creek Tributa in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2024.

How much traffic does Seven Locks Road over Cabin John Creek Tributa carry?

About 18,184 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Seven Locks Road over Cabin John Creek Tributa?

The structure is 22 ft (6.7 m) long with a longest span of 6 ft (1.8 m).

Who owns Seven Locks Road over Cabin John Creek Tributa?

It is owned by the County Highway Agency.