US Bridges

Cattail Road over Dry Seneca Creek

Fair

Montgomery County, Maryland · 1.5 Miles South of Md 28 · Structure no. 200000M-0155010

Built
1975
50 years old, rebuilt 2009
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
63 ft
1 main span
Daily traffic
1,239
2022 count
Owner
County
County Highway Agency

About this bridge

Cattail Road over Dry Seneca Creek is a steel stringer/multi-beam or girder carrying Cattail Road over Dry Seneca Creek in Montgomery County, Maryland. It was built in 1975 and reconstructed in 2009, so it is 50 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 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 1,239 vehicles a day, roughly 3% of them trucks, projected to reach 1,611 by 2042. The structure is 63 ft (19.2 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCattail Road
CrossesDry Seneca Creek
Location1.5 Miles South of Md 28
RouteCounty Highway 257
CountyMontgomery County
StateMaryland
Coordinates39.14739, -77.40224
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95 US tons
Inventory rating56 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length63 ft (19.2 m)
Longest span58 ft (17.7 m)
Deck width33 ft (10.1 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,239 (2022)
Projected traffic1,611 by 2042
Trucks3%
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

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 Cattail Road over Dry Seneca Creek built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 2009.

What condition is Cattail Road over Dry 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 Cattail Road over Dry Seneca Creek carry?

About 1,239 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Cattail Road over Dry Seneca Creek?

The structure is 63 ft (19.2 m) long with a longest span of 58 ft (17.7 m) and a deck 33 ft wide.

Who owns Cattail Road over Dry Seneca Creek?

It is owned by the County Highway Agency.