US Bridges

ST 10 /ST63/MAIN over Water Mill Brook

Fair

Franklin County, Massachusetts · At JCT Mill St. · Structure no. N220210W5DOTNBI

Built
1941
84 years old
Condition
Fair
inspected November 2024
Type
Arch - Deck
Concrete
Length
25 ft
1 main span
Daily traffic
6,983
2017 count
Owner
State
State Highway Agency

About this bridge

ST 10 /ST63/MAIN over Water Mill Brook is a concrete arch - deck carrying ST 10 /ST63/MAIN over Water Mill Brook in Franklin County, Massachusetts. It was built in 1941, so it is 84 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 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 6,983 vehicles a day, roughly 8% of them trucks, projected to reach 6,739 by 2031. The structure is 25 ft (7.6 m) long and 50 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesST 10 /ST63/MAIN
CrossesWater Mill Brook
LocationAt JCT Mill St.
RouteState Highway 10
CountyFranklin County
StateMassachusetts
Coordinates42.70299, -72.45226
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating68.2 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width50 ft (15.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,983 (2017)
Projected traffic6,739 by 2031
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$226,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 10 /ST63/MAIN over Water Mill Brook built?

It was built in 1941, making it 84 years old in 2025.

What condition is ST 10 /ST63/MAIN over Water 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 2024.

How much traffic does ST 10 /ST63/MAIN over Water Mill Brook carry?

About 6,983 vehicles per day (2017 count), of which roughly 8% are trucks.

How long is ST 10 /ST63/MAIN over Water Mill Brook?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 50 ft wide.

Who owns ST 10 /ST63/MAIN over Water Mill Brook?

It is owned by the State Highway Agency.