US Bridges

US 40 Alt over Catoctin Creek

Fair

Frederick County, Maryland · 0.05 M E of Marker Road · Structure no. 100000100040010

Built
1923
102 years old
Condition
Fair
inspected July 2024
Type
Arch - Deck
Concrete
Length
85 ft
1 main span
Daily traffic
9,212
2009 count
Owner
State
State Highway Agency

About this bridge

US 40 Alt over Catoctin Creek is a concrete arch - deck carrying US 40 Alt over Catoctin Creek in Frederick County, Maryland. It was built in 1923, so it is 102 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 9,212 vehicles a day, roughly 8% of them trucks, projected to reach 11,013 by 2026. The structure is 85 ft (25.9 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 40 Alt
CrossesCatoctin Creek
Location0.05 M E of Marker Road
RouteU.S. Route 40
CountyFrederick County
StateMaryland
Coordinates39.75083, -77.94112
Functional classRural 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 protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length85 ft (25.9 m)
Longest span85 ft (25.9 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,212 (2009)
Projected traffic11,013 by 2026
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$151,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 40 Alt over Catoctin Creek built?

It was built in 1923, making it 102 years old in 2025.

What condition is US 40 Alt over Catoctin 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 July 2024.

How much traffic does US 40 Alt over Catoctin Creek carry?

About 9,212 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is US 40 Alt over Catoctin Creek?

The structure is 85 ft (25.9 m) long with a longest span of 85 ft (25.9 m) and a deck 27 ft wide.

Who owns US 40 Alt over Catoctin Creek?

It is owned by the State Highway Agency.