US Bridges

County Road 23 over De Forest Lake

Fair

Rockland County, New York · 1.3 MI SE JCT NY304+US9W · Structure no. 000000003345810

Built
1954
71 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
34 ft
3 main spans
Daily traffic
2,035
2015 count
Owner
County
County Highway Agency

About this bridge

County Road 23 over De Forest Lake is a concrete continuous culvert carrying County Road 23 over De Forest Lake in Rockland County, New York. It was built in 1954, so it is 71 years old, older than the New York average of 53 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 2,035 vehicles a day, roughly 6% of them trucks, projected to reach 2,472 by 2041. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 23
CrossesDe Forest Lake
Location1.3 MI SE JCT NY304+US9W
RouteCounty Highway 0
CountyRockland County
StateNew York
Coordinates41.16023, -73.96429
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length34 ft (10.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,035 (2015)
Projected traffic2,472 by 2041
Trucks6%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 23 over De Forest Lake built?

It was built in 1954, making it 71 years old in 2025.

What condition is County Road 23 over De Forest Lake 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 August 2023.

How much traffic does County Road 23 over De Forest Lake carry?

About 2,035 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is County Road 23 over De Forest Lake?

The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m).

Who owns County Road 23 over De Forest Lake?

It is owned by the County Highway Agency.