US Bridges

RTE 30 over Lake Algonquin

Good

Hamilton County, New York · 3.6 MI S JCT Rts 8 & 30 · Structure no. 000000001021190

Built
2010
15 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
231 ft
2 main spans
Daily traffic
1,435
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 30 over Lake Algonquin is a steel continuous stringer/multi-beam or girder carrying RTE 30 over Lake Algonquin in Hamilton County, New York. It was built in 2010, so it is 15 years old, younger 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 1,435 vehicles a day, roughly 14% of them trucks, projected to reach 1,547 by 2041. The structure is 231 ft (70.4 m) long and 41 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

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CarriesRTE 30
CrossesLake Algonquin
Location3.6 MI S JCT Rts 8 & 30
RouteState Highway 30
CountyHamilton County
StateNew York
Coordinates43.40301, -74.28526
Functional classRural Principal Arterial - Other

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.
Superstructure9 ExcellentNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating86 US tons
Inventory rating52 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length231 ft (70.4 m)
Longest span115 ft (35 m)
Deck width41 ft (12.6 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,435 (2020)
Projected traffic1,547 by 2041
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed49.7 mi (80 km)
TollOn a free road
National Highway SystemYes

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$2.7 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 30 over Lake Algonquin built?

It was built in 2010, making it 15 years old in 2025.

What condition is RTE 30 over Lake Algonquin 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 May 2024.

How much traffic does RTE 30 over Lake Algonquin carry?

About 1,435 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is RTE 30 over Lake Algonquin?

The structure is 231 ft (70.4 m) long with a longest span of 115 ft (35 m) and a deck 41 ft wide.

Who owns RTE 30 over Lake Algonquin?

It is owned by the State Highway Agency.