US Bridges

Trinity Church RD over Gilbert Swamp Run

PoorPosted for load

Charles County, Maryland · 2.05 Miles S of Md 6 · Structure no. 200000CH0034010

Built
1927
98 years old, rebuilt 1958
Condition
Poor
inspected September 2024
Type
Slab
Concrete
Length
37 ft
2 main spans
Daily traffic
656
2024 count
Owner
County
County Highway Agency

About this bridge

Trinity Church RD over Gilbert Swamp Run is a concrete slab carrying Trinity Church RD over Gilbert Swamp Run in Charles County, Maryland. It was built in 1927 and reconstructed in 1958, so it is 98 years old, older than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 656 vehicles a day, roughly 8% of them trucks, projected to reach 801 by 2044. The structure is 37 ft (11.3 m) long and 29 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesTrinity Church RD
CrossesGilbert Swamp Run
Location2.05 Miles S of Md 6
RouteCounty Highway 1121
Coordinates38.45525, -76.87281
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length37 ft (11.3 m)
Longest span17 ft (5.2 m)
Deck width29 ft (8.8 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic656 (2024)
Projected traffic801 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Trinity Church RD over Gilbert Swamp Run built?

It was built in 1927, making it 98 years old in 2025. It was reconstructed in 1958.

What condition is Trinity Church RD over Gilbert Swamp Run in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does Trinity Church RD over Gilbert Swamp Run carry?

About 656 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Trinity Church RD over Gilbert Swamp Run?

The structure is 37 ft (11.3 m) long with a longest span of 17 ft (5.2 m) and a deck 29 ft wide.

Who owns Trinity Church RD over Gilbert Swamp Run?

It is owned by the County Highway Agency.