US Bridges

Route 317 over Hesseky Brook

Fair

Litchfield County, Connecticut · 0.9 Mile West of Route 6 · Structure no. 01671

Built
1957
68 years old
Condition
Fair
inspected April 2024
Type
Slab
Prestressed Concrete
Length
38 ft
1 main span
Daily traffic
4,300
2023 count
Owner
State
State Highway Agency

About this bridge

Route 317 over Hesseky Brook is a prestressed concrete slab carrying Route 317 over Hesseky Brook in Litchfield County, Connecticut. It was built in 1957, so it is 68 years old, older than the Connecticut average of 56.7 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 4,300 vehicles a day, roughly 4% of them trucks, projected to reach 6,389 by 2043. The structure is 38 ft (11.7 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRoute 317
CrossesHesseky Brook
Location0.9 Mile West of Route 6
RouteState Highway 317
CountyLitchfield County
StateConnecticut
Coordinates41.54139, -73.22319
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadUnknown
Structure length38 ft (11.7 m)
Longest span37 ft (11.2 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2023)
Projected traffic6,389 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 317 over Hesseky Brook built?

It was built in 1957, making it 68 years old in 2025.

What condition is Route 317 over Hesseky Brook 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 April 2024.

How much traffic does Route 317 over Hesseky Brook carry?

About 4,300 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Route 317 over Hesseky Brook?

The structure is 38 ft (11.7 m) long with a longest span of 37 ft (11.2 m) and a deck 26 ft wide.

Who owns Route 317 over Hesseky Brook?

It is owned by the State Highway Agency.