US Bridges

US 40 WB over Is 70

Good

Howard County, Maryland · US 40 @ Is 70 · Structure no. 100000130055010

Built
1968
57 years old, rebuilt 2019
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
265 ft
4 main spans
Daily traffic
6,355
2006 count
Owner
State
State Highway Agency

About this bridge

US 40 WB over Is 70 is a steel stringer/multi-beam or girder carrying US 40 WB over Is 70 in Howard County, Maryland. It was built in 1968 and reconstructed in 2019, so it is 57 years old, older 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 6,355 vehicles a day, roughly 8% of them trucks, projected to reach 6,863 by 2026. The structure is 265 ft (80.8 m) long and 42 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesUS 40 WB
CrossesIs 70
LocationUS 40 @ Is 70
RouteU.S. Route 40
Coordinates39.30206, -76.90969
Functional classRural Principal Arterial - Other

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 inspectionFebruary 2024
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 rating61.9 US tons
Inventory rating37 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length265 ft (80.8 m)
Longest span77 ft (23.5 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,355 (2006)
Projected traffic6,863 by 2026
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 40 WB over Is 70 built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2019.

What condition is US 40 WB over Is 70 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 February 2024.

How much traffic does US 40 WB over Is 70 carry?

About 6,355 vehicles per day (2006 count), of which roughly 8% are trucks.

How long is US 40 WB over Is 70?

The structure is 265 ft (80.8 m) long with a longest span of 77 ft (23.5 m) and a deck 42 ft wide.

Who owns US 40 WB over Is 70?

It is owned by the State Highway Agency.