US Bridges

RD104/KENTON RD over Mudstone Branch

Fair

Kent County, Delaware · Northwest Dover · Structure no. 2104B104

Built
1920
105 years old, rebuilt 1934
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
6,536
2022 count
Owner
State
State Highway Agency

About this bridge

RD104/KENTON RD over Mudstone Branch is a concrete culvert carrying RD104/KENTON RD over Mudstone Branch in Kent County, Delaware. It was built in 1920 and reconstructed in 1934, so it is 105 years old, older than the Delaware average of 47.3 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 6,536 vehicles a day, roughly 7% of them trucks, projected to reach 7,155 by 2042. The structure is 20 ft (6.2 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesRD104/KENTON RD
CrossesMudstone Branch
LocationNorthwest Dover
RouteCounty Highway 104
CountyKent County
StateDelaware
Coordinates39.17706, -75.58153
Functional classUrban 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating36.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 15
Structure length20 ft (6.2 m)
Longest span20 ft (6.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,536 (2022)
Projected traffic7,155 by 2042
Trucks7%
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

OwnerState Highway Agency
Maintained byState 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 RD104/KENTON RD over Mudstone Branch built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1934.

What condition is RD104/KENTON RD over Mudstone 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 September 2023.

How much traffic does RD104/KENTON RD over Mudstone Branch carry?

About 6,536 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is RD104/KENTON RD over Mudstone Branch?

The structure is 20 ft (6.2 m) long with a longest span of 20 ft (6.2 m).

Who owns RD104/KENTON RD over Mudstone Branch?

It is owned by the State Highway Agency.