US Bridges

Park Mills Road over Is 270

Fair

Frederick County, Maryland · 0.48 MI S of Md 355 · Structure no. 100000100077010

Built
1950
75 years old, rebuilt 1976
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
220 ft
4 main spans
Daily traffic
742
2023 count
Owner
State
State Highway Agency

About this bridge

Park Mills Road over Is 270 is a steel stringer/multi-beam or girder carrying Park Mills Road over Is 270 in Frederick County, Maryland. It was built in 1950 and reconstructed in 1976, so it is 75 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 742 vehicles a day, roughly 5% of them trucks, projected to reach 1,081 by 2043. The structure is 220 ft (67.1 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

No coordinates are recorded for this structure.

CarriesPark Mills Road
CrossesIs 270
Location0.48 MI S of Md 355
RouteCounty Highway 332
CountyFrederick County
StateMaryland
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length220 ft (67.1 m)
Longest span69 ft (21 m)
Deck width31 ft (9.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic742 (2023)
Projected traffic1,081 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 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$443,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Park Mills Road over Is 270 built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1976.

What condition is Park Mills Road over Is 270 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 June 2023.

How much traffic does Park Mills Road over Is 270 carry?

About 742 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Park Mills Road over Is 270?

The structure is 220 ft (67.1 m) long with a longest span of 69 ft (21 m) and a deck 31 ft wide.

Who owns Park Mills Road over Is 270?

It is owned by the State Highway Agency.