US Bridges

Keeney Mill Road over Little Falls

Good

Baltimore County, Maryland · 0.8 MI NE of Middletown R · Structure no. 200000B-0421010

Built
2005
20 years old
Condition
Good
inspected October 2023
Type
Slab
Prestressed Concrete
Length
24 ft
1 main span
Daily traffic
340
2023 count
Owner
County
County Highway Agency

About this bridge

Keeney Mill Road over Little Falls is a prestressed concrete slab carrying Keeney Mill Road over Little Falls in Baltimore County, Maryland. It was built in 2005, so it is 20 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 340 vehicles a day, roughly 5% of them trucks, projected to reach 530 by 2045. The structure is 24 ft (7.4 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesKeeney Mill Road
CrossesLittle Falls
Location0.8 MI NE of Middletown R
RouteCounty Highway 37
Coordinates39.69224, -76.72044
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95.5 US tons
Inventory rating57.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length24 ft (7.4 m)
Longest span21 ft (6.4 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic340 (2023)
Projected traffic530 by 2045
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Keeney Mill Road over Little Falls built?

It was built in 2005, making it 20 years old in 2025.

What condition is Keeney Mill Road over Little Falls 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 October 2023.

How much traffic does Keeney Mill Road over Little Falls carry?

About 340 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Keeney Mill Road over Little Falls?

The structure is 24 ft (7.4 m) long with a longest span of 21 ft (6.4 m) and a deck 28 ft wide.

Who owns Keeney Mill Road over Little Falls?

It is owned by the County Highway Agency.