US Bridges

Mouth of Monocacy over CSXT Railroad

Good

Montgomery County, Maryland · 0.9 Miles West of Md 28 · Structure no. 200000M-0135010

Built
2007
18 years old
Condition
Good
inspected February 2025
Type
Truss - Thru
Steel
Length
93 ft
1 main span
Daily traffic
365
2025 count
Owner
County
County Highway Agency

About this bridge

Mouth of Monocacy over CSXT Railroad is a steel truss - thru carrying Mouth of Monocacy over CSXT Railroad in Montgomery County, Maryland. It was built in 2007, so it is 18 years old, younger than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 365 vehicles a day, roughly 5% of them trucks, projected to reach 623 by 2045. The structure is 93 ft (28.3 m) long and 18 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesMouth of Monocacy
CrossesCSXT Railroad
Location0.9 Miles West of Md 28
RouteCounty Highway 240
CountyMontgomery County
StateMaryland
Coordinates39.22382, -77.44092
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.5 US tons
Inventory rating44 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span87 ft (26.5 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic365 (2025)
Projected traffic623 by 2045
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesRailroad
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mouth of Monocacy over CSXT Railroad built?

It was built in 2007, making it 18 years old in 2025.

What condition is Mouth of Monocacy over CSXT Railroad in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.

How much traffic does Mouth of Monocacy over CSXT Railroad carry?

About 365 vehicles per day (2025 count), of which roughly 5% are trucks.

How long is Mouth of Monocacy over CSXT Railroad?

The structure is 93 ft (28.3 m) long with a longest span of 87 ft (26.5 m) and a deck 18 ft wide.

Who owns Mouth of Monocacy over CSXT Railroad?

It is owned by the County Highway Agency.