US Bridges

I 91 & Nashs Mill over Water Nashs Mill Brook

Fair

Franklin County, Massachusetts · Mm 44.6 on I-91 · Structure no. G120500XPDOTNBI

Built
1962
63 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
36,983
2016 count
Owner
State
State Highway Agency

About this bridge

I 91 & Nashs Mill over Water Nashs Mill Brook is a concrete continuous culvert carrying I 91 & Nashs Mill over Water Nashs Mill Brook in Franklin County, Massachusetts. It was built in 1962, so it is 63 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 36,983 vehicles a day, roughly 10% of them trucks, projected to reach 37,114 by 2033. The structure is 29 ft (8.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 91 & Nashs Mill
CrossesWater Nashs Mill Brook
LocationMm 44.6 on I-91
RouteInterstate 91
CountyFranklin County
StateMassachusetts
Coordinates42.60665, -72.61252
Functional classUrban 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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
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 rating76.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length29 ft (8.7 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck18 ft (5.5 m)

Traffic and service

Average daily traffic36,983 (2016)
Projected traffic37,114 by 2033
Trucks10%
Lanes on structure6
Traffic directionTwo-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 statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$521,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 91 & Nashs Mill over Water Nashs Mill Brook built?

It was built in 1962, making it 63 years old in 2025.

What condition is I 91 & Nashs Mill over Water Nashs Mill Brook 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 November 2023.

How much traffic does I 91 & Nashs Mill over Water Nashs Mill Brook carry?

About 36,983 vehicles per day (2016 count), of which roughly 10% are trucks.

How long is I 91 & Nashs Mill over Water Nashs Mill Brook?

The structure is 29 ft (8.7 m) long with a longest span of 14 ft (4.3 m).

Who owns I 91 & Nashs Mill over Water Nashs Mill Brook?

It is owned by the State Highway Agency.