US Bridges

Md 306 over Tanyard Branch

Fair

Caroline County, Maryland · 2000 Feet East of Md 315 · Structure no. 200000COF-01030

Built
1950
75 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
29 ft
3 main spans
Daily traffic
2,768
2023 count
Owner
County
County Highway Agency

About this bridge

Md 306 over Tanyard Branch is a concrete culvert carrying Md 306 over Tanyard Branch in Caroline County, Maryland. It was built in 1950, so it is 75 years old, older 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 5 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 2,768 vehicles a day, roughly 8% of them trucks, projected to reach 7,350 by 2043. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMd 306
CrossesTanyard Branch
Location2000 Feet East of Md 315
RouteCity Street 82
CountyCaroline County
StateMaryland
Coordinates38.69627, -75.76456
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,768 (2023)
Projected traffic7,350 by 2043
Trucks8%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$33,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 306 over Tanyard Branch built?

It was built in 1950, making it 75 years old in 2025.

What condition is Md 306 over Tanyard 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 January 2024.

How much traffic does Md 306 over Tanyard Branch carry?

About 2,768 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Md 306 over Tanyard Branch?

The structure is 29 ft (8.8 m) long with a longest span of 6 ft (1.8 m).

Who owns Md 306 over Tanyard Branch?

It is owned by the County Highway Agency.