US Bridges

I 91 NB over Water Mill River

Fair

Hampshire County, Massachusetts · At Exit #22 I-91 · Structure no. H110290Y3DOTNBI

Built
1963
62 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete Continuous
Length
78 ft
3 main spans
Daily traffic
17,181
2016 count
Owner
State
State Highway Agency

About this bridge

I 91 NB over Water Mill River is a concrete continuous culvert carrying I 91 NB over Water Mill River in Hampshire County, Massachusetts. It was built in 1963, so it is 62 years old, younger than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 17,181 vehicles a day, roughly 17% of them trucks, projected to reach 32,676 by 2031. The structure is 78 ft (23.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 91 NB
CrossesWater Mill River
LocationAt Exit #22 I-91
RouteInterstate 91
Coordinates42.39637, -72.62847
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating67.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length78 ft (23.9 m)
Longest span25 ft (7.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,181 (2016)
Projected traffic32,676 by 2031
Trucks17%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 91 NB over Water Mill River built?

It was built in 1963, making it 62 years old in 2025.

What condition is I 91 NB over Water Mill River 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 October 2024.

How much traffic does I 91 NB over Water Mill River carry?

About 17,181 vehicles per day (2016 count), of which roughly 17% are trucks.

How long is I 91 NB over Water Mill River?

The structure is 78 ft (23.9 m) long with a longest span of 25 ft (7.7 m).

Who owns I 91 NB over Water Mill River?

It is owned by the State Highway Agency.