US Bridges

Saint Joe ST over Chipmunk Gulch

Good

Lawrence County, South Dakota · ST Joe ST Spearfish · Structure no. 000000041090071

Built
1999
26 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
150
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Saint Joe ST over Chipmunk Gulch is a concrete culvert carrying Saint Joe ST over Chipmunk Gulch in Lawrence County, South Dakota. It was built in 1999, so it is 26 years old, younger than the South Dakota average of 48.9 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 150 vehicles a day, roughly 3% of them trucks, projected to reach 175 by 2035. The structure is 25 ft (7.5 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSaint Joe ST
CrossesChipmunk Gulch
LocationST Joe ST Spearfish
RouteCity Street 0
Coordinates44.50238, -103.87
Functional classRural Major Collector

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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2022)
Projected traffic175 by 2035
Trucks3%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Saint Joe ST over Chipmunk Gulch built?

It was built in 1999, making it 26 years old in 2025.

What condition is Saint Joe ST over Chipmunk Gulch 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 Saint Joe ST over Chipmunk Gulch carry?

About 150 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Saint Joe ST over Chipmunk Gulch?

The structure is 25 ft (7.5 m) long with a longest span of 12 ft (3.7 m).

Who owns Saint Joe ST over Chipmunk Gulch?

It is owned by the City or Municipal Highway Agency.