US Bridges

Democracy Blvd over Is 270Y

Good

Montgomery County, Maryland · @ Is 270Y · Structure no. 100000150097010

Built
2003
22 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
246 ft
2 main spans
Daily traffic
25,601
2018 count
Owner
State
State Highway Agency

About this bridge

Democracy Blvd over Is 270Y is a steel continuous stringer/multi-beam or girder carrying Democracy Blvd over Is 270Y in Montgomery County, Maryland. It was built in 2003, so it is 22 years old, younger than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25,601 vehicles a day, roughly 5% of them trucks, projected to reach 25,624 by 2038. The structure is 246 ft (75 m) long and 122 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesDemocracy Blvd
CrossesIs 270Y
Location@ Is 270Y
RouteCounty Highway 166
CountyMontgomery County
StateMaryland
Coordinates39.02174, -77.14235
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79 US tons
Inventory rating71 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length246 ft (75 m)
Longest span122 ft (37.2 m)
Deck width122 ft (37.2 m)
Roadway width100 ft (30.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,601 (2018)
Projected traffic25,624 by 2038
Trucks5%
Lanes on structure8
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 Democracy Blvd over Is 270Y built?

It was built in 2003, making it 22 years old in 2025.

What condition is Democracy Blvd over Is 270Y in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does Democracy Blvd over Is 270Y carry?

About 25,601 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Democracy Blvd over Is 270Y?

The structure is 246 ft (75 m) long with a longest span of 122 ft (37.2 m) and a deck 122 ft wide.

Who owns Democracy Blvd over Is 270Y?

It is owned by the State Highway Agency.