US Bridges

Mason Road over Blackwell Brook

Fair

Windham County, Connecticut · .2 Mile West of Route 169 · Structure no. 06005

Built
1991
34 years old
Condition
Fair
inspected February 2025
Type
Slab
Wood or Timber
Length
31 ft
1 main span
Daily traffic
1,208
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Mason Road over Blackwell Brook is a wood or timber slab carrying Mason Road over Blackwell Brook in Windham County, Connecticut. It was built in 1991, so it is 34 years old, younger than the Connecticut average of 56.7 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 1,208 vehicles a day, roughly 7% of them trucks, projected to reach 1,795 by 2043. The structure is 31 ft (9.4 m) long and 18 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMason Road
CrossesBlackwell Brook
Location.2 Mile West of Route 169
RouteCity Street 0
CountyWindham County
StateConnecticut
Coordinates41.77079, -71.95898
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating71 US tons
Inventory rating48.9 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span29 ft (8.8 m)
Deck width18 ft (5.6 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,208 (2023)
Projected traffic1,795 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mason Road over Blackwell Brook built?

It was built in 1991, making it 34 years old in 2025.

What condition is Mason Road over Blackwell 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 February 2025.

How much traffic does Mason Road over Blackwell Brook carry?

About 1,208 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Mason Road over Blackwell Brook?

The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.8 m) and a deck 18 ft wide.

Who owns Mason Road over Blackwell Brook?

It is owned by the Town or Township Highway Agency.