US Bridges

Mt Phillip Road over Is 70

Fair

Frederick County, Maryland · 1.77 MI W of Md 180 · Structure no. 100000100126010

Built
1967
58 years old, rebuilt 1973
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
232 ft
2 main spans
Daily traffic
5,102
2009 count
Owner
State
State Highway Agency

About this bridge

Mt Phillip Road over Is 70 is a steel continuous stringer/multi-beam or girder carrying Mt Phillip Road over Is 70 in Frederick County, Maryland. It was built in 1967 and reconstructed in 1973, so it is 58 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 5,102 vehicles a day, roughly 5% of them trucks, projected to reach 9,962 by 2029. The structure is 232 ft (70.7 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMt Phillip Road
CrossesIs 70
Location1.77 MI W of Md 180
RouteCounty Highway 226
CountyFrederick County
StateMaryland
Coordinates39.41262, -77.47372
Functional classUrban Collector

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.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 15
Structure length232 ft (70.7 m)
Longest span101 ft (30.8 m)
Deck width32 ft (9.8 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,102 (2009)
Projected traffic9,962 by 2029
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$490,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mt Phillip Road over Is 70 built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1973.

What condition is Mt Phillip Road over Is 70 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 July 2024.

How much traffic does Mt Phillip Road over Is 70 carry?

About 5,102 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is Mt Phillip Road over Is 70?

The structure is 232 ft (70.7 m) long with a longest span of 101 ft (30.8 m) and a deck 32 ft wide.

Who owns Mt Phillip Road over Is 70?

It is owned by the State Highway Agency.