US Bridges

Md 413 over Big Annemessex River

Fair

Somerset County, Maryland · 2.59 Miles S of Md 361 · Structure no. 100000190011010

Built
1949
76 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
61 ft
1 main span
Daily traffic
5,670
2009 count
Owner
State
State Highway Agency

About this bridge

Md 413 over Big Annemessex River is a steel stringer/multi-beam or girder carrying Md 413 over Big Annemessex River in Somerset County, Maryland. It was built in 1949, so it is 76 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 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 5,670 vehicles a day, roughly 8% of them trucks, projected to reach 6,780 by 2026. The structure is 61 ft (18.6 m) long and 34 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesMd 413
CrossesBig Annemessex River
Location2.59 Miles S of Md 361
RouteState Highway 413
Coordinates38.08311, -75.72409
Functional classRural Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length61 ft (18.6 m)
Longest span58 ft (17.7 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,670 (2009)
Projected traffic6,780 by 2026
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$138,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 413 over Big Annemessex River built?

It was built in 1949, making it 76 years old in 2025.

What condition is Md 413 over Big Annemessex River 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 June 2024.

How much traffic does Md 413 over Big Annemessex River carry?

About 5,670 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 413 over Big Annemessex River?

The structure is 61 ft (18.6 m) long with a longest span of 58 ft (17.7 m) and a deck 34 ft wide.

Who owns Md 413 over Big Annemessex River?

It is owned by the State Highway Agency.