US Bridges

Mckee Rd. over Mudstone Branch

Good

Kent County, Delaware · N/W of Dover · Structure no. 2156C156

Built
1996
29 years old
Condition
Good
inspected September 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
4,661
2021 count
Owner
State
State Highway Agency

About this bridge

Mckee Rd. over Mudstone Branch is a prestressed concrete box beam or girders - multiple carrying Mckee Rd. over Mudstone Branch in Kent County, Delaware. It was built in 1996, so it is 29 years old, younger than the Delaware average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,661 vehicles a day, roughly 9% of them trucks, projected to reach 5,944 by 2042. The structure is 65 ft (19.7 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesMckee Rd.
CrossesMudstone Branch
LocationN/W of Dover
RouteState Highway 15
CountyKent County
StateDelaware
Coordinates39.18857, -75.56757
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating55.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length65 ft (19.7 m)
Longest span60 ft (18.3 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,661 (2021)
Projected traffic5,944 by 2042
Trucks9%
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 Mckee Rd. over Mudstone Branch built?

It was built in 1996, making it 29 years old in 2025.

What condition is Mckee Rd. over Mudstone Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2022.

How much traffic does Mckee Rd. over Mudstone Branch carry?

About 4,661 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is Mckee Rd. over Mudstone Branch?

The structure is 65 ft (19.7 m) long with a longest span of 60 ft (18.3 m) and a deck 47 ft wide.

Who owns Mckee Rd. over Mudstone Branch?

It is owned by the State Highway Agency.