US Bridges

West Old Baltimore over Little Seneca Creek

Fair

Montgomery County, Maryland · 1.0 Miles West of Md 355 · Structure no. 200000M-0001010

Built
1934
91 years old, rebuilt 1972
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
63 ft
1 main span
Daily traffic
2,361
2024 count
Owner
County
County Highway Agency

About this bridge

West Old Baltimore over Little Seneca Creek is a steel stringer/multi-beam or girder carrying West Old Baltimore over Little Seneca Creek in Montgomery County, Maryland. It was built in 1934 and reconstructed in 1972, so it is 91 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 5 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 2,361 vehicles a day, roughly 3% of them trucks, projected to reach 4,651 by 2044. The structure is 63 ft (19.2 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesWest Old Baltimore
CrossesLittle Seneca Creek
Location1.0 Miles West of Md 355
RouteCounty Highway 231
Coordinates39.21465, -77.27077
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating69 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length63 ft (19.2 m)
Longest span57 ft (17.4 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,361 (2024)
Projected traffic4,651 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$79,000
NavigationNo navigation control on waterway

Frequently asked questions

When was West Old Baltimore over Little Seneca Creek built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1972.

What condition is West Old Baltimore over Little 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 June 2024.

How much traffic does West Old Baltimore over Little Seneca Creek carry?

About 2,361 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is West Old Baltimore over Little Seneca Creek?

The structure is 63 ft (19.2 m) long with a longest span of 57 ft (17.4 m) and a deck 24 ft wide.

Who owns West Old Baltimore over Little Seneca Creek?

It is owned by the County Highway Agency.