US Bridges

HWY Gunn RD over Water Manhan River

FairPosted for load

Hampshire County, Massachusetts · 0.5M S of RT10 Nr Ehptn · Structure no. S190110RUMUNNBI

Built
1952
73 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
76 ft
4 main spans
Daily traffic
2,586
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

HWY Gunn RD over Water Manhan River is a concrete continuous slab carrying HWY Gunn RD over Water Manhan River in Hampshire County, Massachusetts. It was built in 1952, so it is 73 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 2,586 vehicles a day, roughly 5% of them trucks, projected to reach 613 by 2031. The structure is 76 ft (23.2 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesHWY Gunn RD
CrossesWater Manhan River
Location0.5M S of RT10 Nr Ehptn
RouteCity Street 0
Coordinates42.2412, -72.70506
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating37 US tons
Inventory rating22.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length76 ft (23.2 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,586 (2024)
Projected traffic613 by 2031
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Gunn RD over Water Manhan River built?

It was built in 1952, making it 73 years old in 2025.

What condition is HWY Gunn RD over Water Manhan 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 2024.

How much traffic does HWY Gunn RD over Water Manhan River carry?

About 2,586 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is HWY Gunn RD over Water Manhan River?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns HWY Gunn RD over Water Manhan River?

It is owned by the Town or Township Highway Agency.