US Bridges

Md 118 over Great Seneca Creek

Fair

Montgomery County, Maryland · 1.3 Miles North of Md 28 · Structure no. 100000150020010

Built
1931
94 years old, rebuilt 1993
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
90 ft
1 main span
Daily traffic
6,121
2009 count
Owner
State
State Highway Agency

About this bridge

Md 118 over Great Seneca Creek is a steel stringer/multi-beam or girder carrying Md 118 over Great Seneca Creek in Montgomery County, Maryland. It was built in 1931 and reconstructed in 1993, so it is 94 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 6,121 vehicles a day, roughly 7% of them trucks, projected to reach 6,931 by 2026. The structure is 90 ft (27.4 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMd 118
CrossesGreat Seneca Creek
Location1.3 Miles North of Md 28
RouteState Highway 118
CountyMontgomery County
StateMaryland
Coordinates39.12658, -77.29644
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating74 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length90 ft (27.4 m)
Longest span85 ft (25.9 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,121 (2009)
Projected traffic6,931 by 2026
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 118 over Great Seneca Creek built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1993.

What condition is Md 118 over Great Seneca Creek 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 May 2024.

How much traffic does Md 118 over Great Seneca Creek carry?

About 6,121 vehicles per day (2009 count), of which roughly 7% are trucks.

How long is Md 118 over Great Seneca Creek?

The structure is 90 ft (27.4 m) long with a longest span of 85 ft (25.9 m) and a deck 36 ft wide.

Who owns Md 118 over Great Seneca Creek?

It is owned by the State Highway Agency.