US Bridges

Crow Rock Road over Middle Creek

FairPosted for load

Frederick County, Maryland · At Md 17 Intersection · Structure no. 200000F-1609010

Built
1897
128 years old, rebuilt 1997
Condition
Fair
inspected September 2024
Type
Truss - Thru
Steel
Length
80 ft
1 main span
Daily traffic
460
2022 count
Owner
County
County Highway Agency

About this bridge

Crow Rock Road over Middle Creek is a steel truss - thru carrying Crow Rock Road over Middle Creek in Frederick County, Maryland. It was built in 1897 and reconstructed in 1997, so it is 128 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. Its operating status is: posted for load restriction.

It carries about 460 vehicles a day, roughly 2% of them trucks, projected to reach 685 by 2042. The structure is 80 ft (24.4 m) long and 14 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCrow Rock Road
CrossesMiddle Creek
LocationAt Md 17 Intersection
RouteCounty Highway 131
CountyFrederick County
StateMaryland
Coordinates39.52589, -77.53733
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30.5 US tons
Inventory rating18 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 15
Structure length80 ft (24.4 m)
Longest span75 ft (22.9 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (3.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic460 (2022)
Projected traffic685 by 2042
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 Crow Rock Road over Middle Creek built?

It was built in 1897, making it 128 years old in 2025. It was reconstructed in 1997.

What condition is Crow Rock Road over Middle 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 September 2024.

How much traffic does Crow Rock Road over Middle Creek carry?

About 460 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Crow Rock Road over Middle Creek?

The structure is 80 ft (24.4 m) long with a longest span of 75 ft (22.9 m) and a deck 14 ft wide.

Who owns Crow Rock Road over Middle Creek?

It is owned by the County Highway Agency.