US Bridges

Rehoboth Blvd. over Mispillion River

Fair

Kent County, Delaware · Milford · Structure no. 2021A021

Built
1929
96 years old, rebuilt 1996
Condition
Fair
inspected November 2023
Type
Movable - Bascule
Steel
Length
112 ft
1 main span
Daily traffic
8,098
2022 count
Owner
State
State Highway Agency

About this bridge

Rehoboth Blvd. over Mispillion River is a steel movable - bascule carrying Rehoboth Blvd. over Mispillion River in Kent County, Delaware. It was built in 1929 and reconstructed in 1996, so it is 96 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 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 8,098 vehicles a day, roughly 7% of them trucks, projected to reach 9,115 by 2042. The structure is 112 ft (34.1 m) long and 25 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesRehoboth Blvd.
CrossesMispillion River
LocationMilford
RouteState Highway 1B
CountyKent County
StateDelaware
Coordinates38.91727, -75.41764
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 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
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 rating31.1 US tons
Inventory rating23.9 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckOpen grating
Main spans1 (+2 approach)
Design loadH 20
Structure length112 ft (34.1 m)
Longest span56 ft (17.2 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck14 ft (4.3 m)

Traffic and service

Average daily traffic8,098 (2022)
Projected traffic9,115 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 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$420,000
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Rehoboth Blvd. over Mispillion River built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1996.

What condition is Rehoboth Blvd. over Mispillion 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 November 2023.

How much traffic does Rehoboth Blvd. over Mispillion River carry?

About 8,098 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Rehoboth Blvd. over Mispillion River?

The structure is 112 ft (34.1 m) long with a longest span of 56 ft (17.2 m) and a deck 25 ft wide.

Who owns Rehoboth Blvd. over Mispillion River?

It is owned by the State Highway Agency.