US Bridges

RTE 31 over Putnam Brook

Good

Cayuga County, New York · 0.2 MI E JCT Rts 31 + 34 · Structure no. 000000001021850

Built
1950
75 years old, rebuilt 2012
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
49 ft
1 main span
Daily traffic
3,116
2018 count
Owner
State
State Highway Agency

About this bridge

RTE 31 over Putnam Brook is a steel stringer/multi-beam or girder carrying RTE 31 over Putnam Brook in Cayuga County, New York. It was built in 1950 and reconstructed in 2012, so it is 75 years old, older than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,116 vehicles a day, roughly 16% of them trucks, projected to reach 3,135 by 2041. The structure is 49 ft (14.9 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesRTE 31
CrossesPutnam Brook
Location0.2 MI E JCT Rts 31 + 34
RouteState Highway 31
CountyCayuga County
StateNew York
Coordinates43.05573, -76.55315
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating73 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length49 ft (14.9 m)
Longest span47 ft (14.3 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,116 (2018)
Projected traffic3,135 by 2041
Trucks16%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 31 over Putnam Brook built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2012.

What condition is RTE 31 over Putnam Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does RTE 31 over Putnam Brook carry?

About 3,116 vehicles per day (2018 count), of which roughly 16% are trucks.

How long is RTE 31 over Putnam Brook?

The structure is 49 ft (14.9 m) long with a longest span of 47 ft (14.3 m) and a deck 37 ft wide.

Who owns RTE 31 over Putnam Brook?

It is owned by the State Highway Agency.