US Bridges

Is 70 over Bush Creek

Fair

Frederick County, Maryland · 0.84 Mile East of Md 75 · Structure no. 100000100021040

Built
1954
71 years old, rebuilt 1972
Condition
Fair
inspected October 2023
Type
Frame
Concrete
Length
36 ft
1 main span
Daily traffic
69,020
2009 count
Owner
State
State Highway Agency

About this bridge

Is 70 over Bush Creek is a concrete frame carrying Is 70 over Bush Creek in Frederick County, Maryland. It was built in 1954 and reconstructed in 1972, so it is 71 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 6 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 69,020 vehicles a day, roughly 8% of them trucks, projected to reach 70,362 by 2026. The structure is 36 ft (11 m) long and 203 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIs 70
CrossesBush Creek
Location0.84 Mile East of Md 75
RouteInterstate 70
CountyFrederick County
StateMaryland
Coordinates39.37837, -77.24519
Functional classUrban Principal Arterial - Interstate

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating33.5 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span36 ft (11 m)
Deck width203 ft (62 m)
Roadway width154 ft (46.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic69,020 (2009)
Projected traffic70,362 by 2026
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$322,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 70 over Bush Creek built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1972.

What condition is Is 70 over Bush 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 October 2023.

How much traffic does Is 70 over Bush Creek carry?

About 69,020 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Is 70 over Bush Creek?

The structure is 36 ft (11 m) long with a longest span of 36 ft (11 m) and a deck 203 ft wide.

Who owns Is 70 over Bush Creek?

It is owned by the State Highway Agency.