US Bridges

Pennyfield Lock Ro over Unnamed Tributary

Good

Montgomery County, Maryland · 0.8 MI S of River Road · Structure no. 200000M-0198010

Built
2017
8 years old
Condition
Good
inspected March 2023
Type
Slab
Prestressed Concrete
Length
35 ft
1 main span
Daily traffic
529
2023 count
Owner
County
County Highway Agency

About this bridge

Pennyfield Lock Ro over Unnamed Tributary is a prestressed concrete slab carrying Pennyfield Lock Ro over Unnamed Tributary in Montgomery County, Maryland. It was built in 2017, so it is 8 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 529 vehicles a day, roughly 5% of them trucks, projected to reach 645 by 2043. The structure is 35 ft (10.7 m) long and 20 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesPennyfield Lock Ro
CrossesUnnamed Tributary
Location0.8 MI S of River Road
RouteCounty Highway 26
CountyMontgomery County
StateMaryland
Coordinates39.05731, -77.29314
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating85.8 US tons
Inventory rating66 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span30 ft (9.1 m)
Deck width20 ft (6.1 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic529 (2023)
Projected traffic645 by 2043
Trucks5%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Pennyfield Lock Ro over Unnamed Tributary built?

It was built in 2017, making it 8 years old in 2025.

What condition is Pennyfield Lock Ro over Unnamed Tributary 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 March 2023.

How much traffic does Pennyfield Lock Ro over Unnamed Tributary carry?

About 529 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Pennyfield Lock Ro over Unnamed Tributary?

The structure is 35 ft (10.7 m) long with a longest span of 30 ft (9.1 m) and a deck 20 ft wide.

Who owns Pennyfield Lock Ro over Unnamed Tributary?

It is owned by the County Highway Agency.