US Bridges

Mouth of Monocacy over Little Monocacy River

PoorPosted for load

Montgomery County, Maryland · 0.5 MI E of Mt Ephram RD · Structure no. 200000M-0043010

Built
1971
54 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
49 ft
1 main span
Daily traffic
79
2023 count
Owner
County
County Highway Agency

About this bridge

Mouth of Monocacy over Little Monocacy River is a steel stringer/multi-beam or girder carrying Mouth of Monocacy over Little Monocacy River in Montgomery County, Maryland. It was built in 1971, so it is 54 years old, older than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 79 vehicles a day, roughly 3% of them trucks, projected to reach 104 by 2043. The structure is 49 ft (14.9 m) long and 15 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesMouth of Monocacy
CrossesLittle Monocacy River
Location0.5 MI E of Mt Ephram RD
RouteCounty Highway 240
CountyMontgomery County
StateMaryland
Coordinates39.21989, -77.41332
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating33 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadH 20
Structure length49 ft (14.9 m)
Longest span47 ft (14.3 m)
Deck width15 ft (4.6 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79 (2023)
Projected traffic104 by 2043
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$113,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mouth of Monocacy over Little Monocacy River built?

It was built in 1971, making it 54 years old in 2025.

What condition is Mouth of Monocacy over Little Monocacy River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Mouth of Monocacy over Little Monocacy River carry?

About 79 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Mouth of Monocacy over Little Monocacy River?

The structure is 49 ft (14.9 m) long with a longest span of 47 ft (14.3 m) and a deck 15 ft wide.

Who owns Mouth of Monocacy over Little Monocacy River?

It is owned by the County Highway Agency.