US Bridges

Reservoir Lake Roa over Tomhannock Backwater

Poor

Rensselaer County, New York · 2.1 MI W Pittstown · Structure no. 000000003303420

Built
1949
76 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
76 ft
1 main span
Daily traffic
1,156
2021 count
Owner
County
County Highway Agency

About this bridge

Reservoir Lake Roa over Tomhannock Backwater is a steel stringer/multi-beam or girder carrying Reservoir Lake Roa over Tomhannock Backwater in Rensselaer County, New York. It was built in 1949, so it is 76 years old, older than the New York average of 53 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 1,156 vehicles a day, roughly 5% of them trucks, projected to reach 1,618 by 2041. The structure is 76 ft (23.2 m) long and 31 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesReservoir Lake Roa
CrossesTomhannock Backwater
Location2.1 MI W Pittstown
RouteCounty Highway 0
Coordinates42.83881, -73.52466
Functional classRural Minor 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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length76 ft (23.2 m)
Longest span72 ft (21.9 m)
Deck width31 ft (9.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,156 (2021)
Projected traffic1,618 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Reservoir Lake Roa over Tomhannock Backwater built?

It was built in 1949, making it 76 years old in 2025.

What condition is Reservoir Lake Roa over Tomhannock Backwater 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 May 2024.

How much traffic does Reservoir Lake Roa over Tomhannock Backwater carry?

About 1,156 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Reservoir Lake Roa over Tomhannock Backwater?

The structure is 76 ft (23.2 m) long with a longest span of 72 ft (21.9 m) and a deck 31 ft wide.

Who owns Reservoir Lake Roa over Tomhannock Backwater?

It is owned by the County Highway Agency.