US Bridges

Baltimore Lane over Folly Branch

Fair

Prince George's County, Maryland · 0.29 MI N of Md 450 · Structure no. 200000P-0296010

Built
1998
27 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
990
2023 count
Owner
County
County Highway Agency

About this bridge

Baltimore Lane over Folly Branch is a prestressed concrete box beam or girders - multiple carrying Baltimore Lane over Folly Branch in Prince George's County, Maryland. It was built in 1998, so it is 27 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 990 vehicles a day, roughly 10% of them trucks, projected to reach 1,480 by 2043. The structure is 56 ft (17.1 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBaltimore Lane
CrossesFolly Branch
Location0.29 MI N of Md 450
RouteCounty Highway 412
CountyPrince George's County
StateMaryland
Coordinates38.96216, -76.82321
Functional classUrban 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.5 US tons
Inventory rating51 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span52 ft (15.9 m)
Deck width38 ft (11.5 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic990 (2023)
Projected traffic1,480 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Baltimore Lane over Folly Branch built?

It was built in 1998, making it 27 years old in 2025.

What condition is Baltimore Lane over Folly Branch 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 March 2023.

How much traffic does Baltimore Lane over Folly Branch carry?

About 990 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Baltimore Lane over Folly Branch?

The structure is 56 ft (17.1 m) long with a longest span of 52 ft (15.9 m) and a deck 38 ft wide.

Who owns Baltimore Lane over Folly Branch?

It is owned by the County Highway Agency.