US Bridges

Route 175 over Mill Brook

Fair

Hartford County, Connecticut · 475 Ft East of Route 173 · Structure no. 05337

Built
1984
41 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
24,800
2018 count
Owner
State
State Highway Agency

About this bridge

Route 175 over Mill Brook is a concrete culvert carrying Route 175 over Mill Brook in Hartford County, Connecticut. It was built in 1984, so it is 41 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 5 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 24,800 vehicles a day, roughly 4% of them trucks, projected to reach 36,850 by 2038. The structure is 26 ft (7.9 m) long and 71 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesRoute 175
CrossesMill Brook
Location475 Ft East of Route 173
RouteState Highway 175
CountyHartford County
StateConnecticut
Coordinates41.69701, -72.73114
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating37.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width71 ft (21.5 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,800 (2018)
Projected traffic36,850 by 2038
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 175 over Mill Brook built?

It was built in 1984, making it 41 years old in 2025.

What condition is Route 175 over 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 June 2023.

How much traffic does Route 175 over Mill Brook carry?

About 24,800 vehicles per day (2018 count), of which roughly 4% are trucks.

How long is Route 175 over Mill Brook?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 71 ft wide.

Who owns Route 175 over Mill Brook?

It is owned by the State Highway Agency.