US Bridges

Horton Hill Rd. over Marks Brook

Poor

New Haven County, Connecticut · .13 Mi. North of Route 63 · Structure no. 06913

Built
1940
85 years old
Condition
Poor
inspected October 2024
Type
Culvert
Steel
Length
26 ft
3 main spans
Daily traffic
2,700
2018 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Horton Hill Rd. over Marks Brook is a steel culvert carrying Horton Hill Rd. over Marks Brook in New Haven County, Connecticut. It was built in 1940, so it is 85 years old, older than the Connecticut average of 56.7 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 2,700 vehicles a day, roughly 2% of them trucks, projected to reach 4,012 by 2038. The structure is 26 ft (7.9 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHorton Hill Rd.
CrossesMarks Brook
Location.13 Mi. North of Route 63
RouteCity Street 0
CountyNew Haven County
StateConnecticut
Coordinates41.46975, -73.00914
Functional classUrban Collector

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
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating32.8 US tons
Inventory rating25.4 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span7 ft (2.1 m)
Deck width60 ft (18.3 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2018)
Projected traffic4,012 by 2038
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Horton Hill Rd. over Marks Brook built?

It was built in 1940, making it 85 years old in 2025.

What condition is Horton Hill Rd. over Marks Brook 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 October 2024.

How much traffic does Horton Hill Rd. over Marks Brook carry?

About 2,700 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is Horton Hill Rd. over Marks Brook?

The structure is 26 ft (7.9 m) long with a longest span of 7 ft (2.1 m) and a deck 60 ft wide.

Who owns Horton Hill Rd. over Marks Brook?

It is owned by the Town or Township Highway Agency.