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Mouth of Monocacy over Little Monocacy River

Montgomery County, Maryland · rated Poor in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Mouth of Monocacy over Little Monocacy River in Montgomery County, Maryland, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1971, making it 54 years old at the 2025 inventory.
It carries about 79 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 25 of the 522 inventoried bridges in Montgomery County rated poor (4.8%); 25 (4.8%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 48 ft
Location	0.5 Mi E of Mt Ephram Rd
NBI structure number	200000M-0043010
Condition class	Poor

Source: FHWA National Bridge Inventory, 2025 data as reported by the Maryland department of transportation.

Bridge	Built	Vehicles/day	Condition
Is 270 over Old Farm Creek	1958	265,320	Fair
Is 270 over Tuckerman Lane	1958	265,320	Fair
Is 495 over Stoney Brook Dr Rock CR	1964	242,821	Fair
Is 495 over Md 650	1963	242,500	Fair
Is 270 & Cd Rds over Watts Branch	1955	239,460	Fair
Is 495 over Md 185	1964	239,310	Fair