US Bridges

Lily Pons Road over Monocacy River

Fair

Frederick County, Maryland · 1 MI E of Md RTE 85 · Structure no. 200000F-0104010

Built
1977
48 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
625 ft
5 main spans
Daily traffic
610
2020 count
Owner
County
County Highway Agency

About this bridge

Lily Pons Road over Monocacy River is a steel continuous stringer/multi-beam or girder carrying Lily Pons Road over Monocacy River in Frederick County, Maryland. It was built in 1977, so it is 48 years old, younger 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 610 vehicles a day, roughly 5% of them trucks, projected to reach 910 by 2040. The structure is 625 ft (190.5 m) long and 43 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLily Pons Road
CrossesMonocacy River
Location1 MI E of Md RTE 85
RouteCounty Highway 325
CountyFrederick County
StateMaryland
Coordinates39.29398, -77.43811
Functional classRural Local

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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length625 ft (190.5 m)
Longest span124 ft (37.8 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic610 (2020)
Projected traffic910 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lily Pons Road over Monocacy River built?

It was built in 1977, making it 48 years old in 2025.

What condition is Lily Pons Road over Monocacy River 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 June 2024.

How much traffic does Lily Pons Road over Monocacy River carry?

About 610 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Lily Pons Road over Monocacy River?

The structure is 625 ft (190.5 m) long with a longest span of 124 ft (37.8 m) and a deck 43 ft wide.

Who owns Lily Pons Road over Monocacy River?

It is owned by the County Highway Agency.