US Bridges

Mount Phillip Road over Branch of Rock Creek

Fair

Frederick County, Maryland · 230 S of US Alt 40 · Structure no. 200000F-2402030

Built
1980
45 years old
Condition
Fair
inspected May 2023
Type
Culvert
Steel
Length
20 ft
Daily traffic
5,847
2022 count
Owner
County
County Highway Agency

About this bridge

Mount Phillip Road over Branch of Rock Creek is a steel culvert carrying Mount Phillip Road over Branch of Rock Creek in Frederick County, Maryland. It was built in 1980, so it is 45 years old, younger 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 5,847 vehicles a day, roughly 20% of them trucks, projected to reach 7,000 by 2056. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMount Phillip Road
CrossesBranch of Rock Creek
Location230 S of US Alt 40
RouteCounty Highway 226
CountyFrederick County
StateMaryland
Coordinates39.41929, -77.46619
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans0
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span0 ft (0 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,847 (2022)
Projected traffic7,000 by 2056
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mount Phillip Road over Branch of Rock Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is Mount Phillip Road over Branch of Rock 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 May 2023.

How much traffic does Mount Phillip Road over Branch of Rock Creek carry?

About 5,847 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is Mount Phillip Road over Branch of Rock Creek?

The structure is 20 ft (6.1 m) long.

Who owns Mount Phillip Road over Branch of Rock Creek?

It is owned by the County Highway Agency.