US Bridges

ST 31 Reservoir ST over RR Pwrr

PoorPosted for load

Worcester County, Massachusetts · .5 MI W of ST-122A · Structure no. H18002223DOT634

Built
1983
42 years old
Condition
Poor
inspected January 2025
Type
Slab
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
11,497
2021 count
Owner
State
State Highway Agency

About this bridge

ST 31 Reservoir ST over RR Pwrr is a prestressed concrete slab carrying ST 31 Reservoir ST over RR Pwrr in Worcester County, Massachusetts. It was built in 1983, so it is 42 years old, younger than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 11,497 vehicles a day, roughly 7% of them trucks, projected to reach 25,427 by 2032. The structure is 51 ft (15.5 m) long and 49 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesST 31 Reservoir ST
CrossesRR Pwrr
Location.5 MI W of ST-122A
RouteState Highway 31
CountyWorcester County
StateMassachusetts
Coordinates42.34782, -71.86494
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56 US tons
Inventory rating27.3 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span42 ft (12.8 m)
Deck width49 ft (14.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,497 (2021)
Projected traffic25,427 by 2032
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$5.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 31 Reservoir ST over RR Pwrr built?

It was built in 1983, making it 42 years old in 2025.

What condition is ST 31 Reservoir ST over RR Pwrr in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2025.

How much traffic does ST 31 Reservoir ST over RR Pwrr carry?

About 11,497 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is ST 31 Reservoir ST over RR Pwrr?

The structure is 51 ft (15.5 m) long with a longest span of 42 ft (12.8 m) and a deck 49 ft wide.

Who owns ST 31 Reservoir ST over RR Pwrr?

It is owned by the State Highway Agency.