US Bridges

HWY Rocky LA over RR MBTA

Good

Norfolk County, Massachusetts · 200 Ft S of N Main ST · Structure no. C170089PTMUNNBI

Built
2006
19 years old
Condition
Good
inspected October 2023
Type
Slab
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
1,810
2021 count
Owner
State
Other State Agency

About this bridge

HWY Rocky LA over RR MBTA is a prestressed concrete slab carrying HWY Rocky LA over RR MBTA in Norfolk County, Massachusetts. It was built in 2006, so it is 19 years old, younger than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,810 vehicles a day, roughly 75% of them trucks. The structure is 41 ft (12.5 m) long and 35 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesHWY Rocky LA
CrossesRR MBTA
Location200 Ft S of N Main ST
RouteCity Street 0
Coordinates42.24273, -70.82233
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating80.4 US tons
Inventory rating48.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length41 ft (12.5 m)
Longest span39 ft (12 m)
Deck width35 ft (10.7 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,810 (2021)
Projected traffic—
Trucks75%
Lanes on structure2
Traffic directionHighway traffic not carried
CarriesHighway
CrossesRailroad
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byOther State Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$137,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Rocky LA over RR MBTA built?

It was built in 2006, making it 19 years old in 2025.

What condition is HWY Rocky LA over RR MBTA in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does HWY Rocky LA over RR MBTA carry?

About 1,810 vehicles per day (2021 count), of which roughly 75% are trucks.

How long is HWY Rocky LA over RR MBTA?

The structure is 41 ft (12.5 m) long with a longest span of 39 ft (12 m) and a deck 35 ft wide.

Who owns HWY Rocky LA over RR MBTA?

It is owned by the Other State Agency.