US Bridges

Md 17 over CSX Trans. Potomac Mun

Fair

Frederick County, Maryland · On Virginia Line · Structure no. 100000100024010

Built
1953
72 years old
Condition
Fair
inspected September 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
2,430 ft
19 main spans
Daily traffic
6,073
2022 count
Owner
State
State Highway Agency

About this bridge

Md 17 over CSX Trans. Potomac Mun is a steel continuous girder and floorbeam system carrying Md 17 over CSX Trans. Potomac Mun in Frederick County, Maryland. It was built in 1953, so it is 72 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 6,073 vehicles a day, roughly 4% of them trucks, projected to reach 7,560 by 2044. The structure is 2,430 ft (740.7 m) long and 34 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesMd 17
CrossesCSX Trans. Potomac Mun
LocationOn Virginia Line
RouteState Highway 17
CountyFrederick County
StateMaryland
Coordinates39.30708, -77.63159
Functional classUrban Minor Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating45.5 US tons
Inventory rating27 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans19 (+1 approach)
Design loadH 20
Structure length2,430 ft (740.7 m)
Longest span161 ft (49.1 m)
Deck width34 ft (10.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,073 (2022)
Projected traffic7,560 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway, waterway and railroad
Detour if closed24.9 mi (40 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$5.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 17 over CSX Trans. Potomac Mun built?

It was built in 1953, making it 72 years old in 2025.

What condition is Md 17 over CSX Trans. Potomac Mun 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 2023.

How much traffic does Md 17 over CSX Trans. Potomac Mun carry?

About 6,073 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Md 17 over CSX Trans. Potomac Mun?

The structure is 2,430 ft (740.7 m) long with a longest span of 161 ft (49.1 m) and a deck 34 ft wide.

Who owns Md 17 over CSX Trans. Potomac Mun?

It is owned by the State Highway Agency.