US Bridges

Adams Dam RD over Wilson Run

Fair

New Castle County, Delaware · Rockland · Structure no. 1069 232

Built
1933
92 years old, rebuilt 1998
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
4,319
2022 count
Owner
State
State Highway Agency

About this bridge

Adams Dam RD over Wilson Run is a prestressed concrete box beam or girders - single or spread carrying Adams Dam RD over Wilson Run in New Castle County, Delaware. It was built in 1933 and reconstructed in 1998, so it is 92 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 4,319 vehicles a day, roughly 17% of them trucks, projected to reach 3,946 by 2042. The structure is 36 ft (11 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesAdams Dam RD
CrossesWilson Run
LocationRockland
RouteCounty Highway 232
CountyNew Castle County
StateDelaware
Coordinates39.79803, -75.5765
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating47.5 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length36 ft (11 m)
Longest span31 ft (9.6 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,319 (2022)
Projected traffic3,946 by 2042
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$173,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Adams Dam RD over Wilson Run built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1998.

What condition is Adams Dam RD over Wilson Run 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 April 2023.

How much traffic does Adams Dam RD over Wilson Run carry?

About 4,319 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is Adams Dam RD over Wilson Run?

The structure is 36 ft (11 m) long with a longest span of 31 ft (9.6 m) and a deck 29 ft wide.

Who owns Adams Dam RD over Wilson Run?

It is owned by the State Highway Agency.