US Bridges

S. Cemetery Road over Mill Slough

Good

Canyon County, Idaho · 0.5 S. 0.4 W. Middleton · Structure no. 000000000034280

Built
2021
4 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete
Length
30 ft
1 main span
Daily traffic
50
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

S. Cemetery Road over Mill Slough is a concrete culvert carrying S. Cemetery Road over Mill Slough in Canyon County, Idaho. It was built in 2021, so it is 4 years old, younger than the Idaho average of 45.3 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 50 vehicles a day, roughly 1% of them trucks, projected to reach 75 by 2042. The structure is 30 ft (9.1 m) long and 76 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesS. Cemetery Road
CrossesMill Slough
Location0.5 S. 0.4 W. Middleton
RouteCity Street 0
CountyCanyon County
StateIdaho
Coordinates43.69892, -116.62869
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating73.5 US tons
Inventory rating56.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width76 ft (23.2 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2042
Trucks1%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S. Cemetery Road over Mill Slough built?

It was built in 2021, making it 4 years old in 2025.

What condition is S. Cemetery Road over Mill Slough 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 November 2023.

How much traffic does S. Cemetery Road over Mill Slough carry?

About 50 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is S. Cemetery Road over Mill Slough?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 76 ft wide.

Who owns S. Cemetery Road over Mill Slough?

It is owned by the City or Municipal Highway Agency.