US Bridges

HWY Prospect ST over Water Mill River

Fair

Hampshire County, Massachusetts · 0.3 MI N of Elm St. · Structure no. H110030QNMUNNBI

Built
1977
48 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
177 ft
2 main spans
Daily traffic
2,175
2017 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

HWY Prospect ST over Water Mill River is a prestressed concrete stringer/multi-beam or girder carrying HWY Prospect ST over Water Mill River in Hampshire County, Massachusetts. It was built in 1977, so it is 48 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 2,175 vehicles a day, roughly 10% of them trucks, projected to reach 1,633 by 2032. The structure is 177 ft (53.9 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesHWY Prospect ST
CrossesWater Mill River
Location0.3 MI N of Elm St.
RouteCity Street 0
CountyHampshire County
StateMassachusetts
Coordinates42.37125, -72.60727
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.2 US tons
Inventory rating35.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length177 ft (53.9 m)
Longest span84 ft (25.6 m)
Deck width41 ft (12.6 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,175 (2017)
Projected traffic1,633 by 2032
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$4.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Prospect ST over Water Mill River built?

It was built in 1977, making it 48 years old in 2025.

What condition is HWY Prospect ST 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 June 2023.

How much traffic does HWY Prospect ST over Water Mill River carry?

About 2,175 vehicles per day (2017 count), of which roughly 10% are trucks.

How long is HWY Prospect ST over Water Mill River?

The structure is 177 ft (53.9 m) long with a longest span of 84 ft (25.6 m) and a deck 41 ft wide.

Who owns HWY Prospect ST over Water Mill River?

It is owned by the Town or Township Highway Agency.