US Bridges

CR 520 over Shrewsbury River

Poor

Monmouth County, New Jersey · 200FT.W of Ocean AV-RTE36 · Structure no. 1300S32

Built
1950
75 years old
Condition
Poor
inspected June 2023
Type
Movable - Bascule
Steel
Length
661 ft
1 main span
Daily traffic
11,230
2023 count
Owner
County
County Highway Agency

About this bridge

CR 520 over Shrewsbury River is a steel movable - bascule carrying CR 520 over Shrewsbury River in Monmouth County, New Jersey. It was built in 1950, so it is 75 years old, older than the New Jersey average of 58.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 11,230 vehicles a day, roughly 4% of them trucks, projected to reach 13,700 by 2043. The structure is 661 ft (201.5 m) long and 52 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCR 520
CrossesShrewsbury River
Location200FT.W of Ocean AV-RTE36
RouteCounty Highway 520
CountyMonmouth County
StateNew Jersey
Coordinates40.36578, -73.97692
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38 US tons
Inventory rating22 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+9 approach)
Design loadUnknown
Structure length661 ft (201.5 m)
Longest span96 ft (29.3 m)
Deck width52 ft (16 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,230 (2023)
Projected traffic13,700 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$38.1 million (2023 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was CR 520 over Shrewsbury River built?

It was built in 1950, making it 75 years old in 2025.

What condition is CR 520 over Shrewsbury River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.

How much traffic does CR 520 over Shrewsbury River carry?

About 11,230 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is CR 520 over Shrewsbury River?

The structure is 661 ft (201.5 m) long with a longest span of 96 ft (29.3 m) and a deck 52 ft wide.

Who owns CR 520 over Shrewsbury River?

It is owned by the County Highway Agency.