US Bridges

Md 28 over Is 270 & C-D Roads

Fair

Montgomery County, Maryland · 0.96 Mile North of Md 189 · Structure no. 100000150048010

Built
1955
70 years old, rebuilt 1984
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
297 ft
4 main spans
Daily traffic
26,090
2009 count
Owner
State
State Highway Agency

About this bridge

Md 28 over Is 270 & C-D Roads is a steel stringer/multi-beam or girder carrying Md 28 over Is 270 & C-D Roads in Montgomery County, Maryland. It was built in 1955 and reconstructed in 1984, so it is 70 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 26,090 vehicles a day, roughly 8% of them trucks, projected to reach 30,474 by 2026. The structure is 297 ft (90.5 m) long and 106 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesMd 28
CrossesIs 270 & C-D Roads
Location0.96 Mile North of Md 189
RouteState Highway 28
Coordinates39.08593, -77.17381
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating61 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length297 ft (90.5 m)
Longest span81 ft (24.7 m)
Deck width106 ft (32.4 m)
Roadway width94 ft (28.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,090 (2009)
Projected traffic30,474 by 2026
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Md 28 over Is 270 & C-D Roads built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1984.

What condition is Md 28 over Is 270 & C-D Roads 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 April 2023.

How much traffic does Md 28 over Is 270 & C-D Roads carry?

About 26,090 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 28 over Is 270 & C-D Roads?

The structure is 297 ft (90.5 m) long with a longest span of 81 ft (24.7 m) and a deck 106 ft wide.

Who owns Md 28 over Is 270 & C-D Roads?

It is owned by the State Highway Agency.