US Bridges

Montchanin R/SR100 over Trib. to Wilsons Run

Fair

New Castle County, Delaware · West of Rockland · Structure no. 1071 232

Built
1993
32 years old
Condition
Fair
inspected February 2023
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
22 ft
1 main span
Daily traffic
6,405
2021 count
Owner
State
State Highway Agency

About this bridge

Montchanin R/SR100 over Trib. to Wilsons Run is a aluminum, wrought iron, or cast iron culvert carrying Montchanin R/SR100 over Trib. to Wilsons Run in New Castle County, Delaware. It was built in 1993, so it is 32 years old, younger 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 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 6,405 vehicles a day, roughly 11% of them trucks, projected to reach 7,897 by 2042. The structure is 22 ft (6.6 m) long and 44 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesMontchanin R/SR100
CrossesTrib. to Wilsons Run
LocationWest of Rockland
RouteState Highway 100
CountyNew Castle County
StateDelaware
Coordinates39.80334, -75.58807
Functional classRural Major 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 protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHS 20
Structure length22 ft (6.6 m)
Longest span22 ft (6.6 m)
Deck width44 ft (13.4 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,405 (2021)
Projected traffic7,897 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 proposedNone recorded
Estimated improvement cost$99,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Montchanin R/SR100 over Trib. to Wilsons Run built?

It was built in 1993, making it 32 years old in 2025.

What condition is Montchanin R/SR100 over Trib. to Wilsons 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 February 2023.

How much traffic does Montchanin R/SR100 over Trib. to Wilsons Run carry?

About 6,405 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Montchanin R/SR100 over Trib. to Wilsons Run?

The structure is 22 ft (6.6 m) long with a longest span of 22 ft (6.6 m) and a deck 44 ft wide.

Who owns Montchanin R/SR100 over Trib. to Wilsons Run?

It is owned by the State Highway Agency.