US Bridges

SD036 over Grace Coolidge Ck

Good

Custer County, South Dakota · 1.8 W JCT Sd 79 · Structure no. 000000017417035

Built
1992
33 years old
Condition
Good
inspected June 2023
Type
Slab
Concrete Continuous
Length
133 ft
4 main spans
Daily traffic
955
2024 count
Owner
State
State Highway Agency

About this bridge

SD036 over Grace Coolidge Ck is a concrete continuous slab carrying SD036 over Grace Coolidge Ck in Custer County, South Dakota. It was built in 1992, so it is 33 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 955 vehicles a day, roughly 3% of them trucks, projected to reach 1,558 by 2044. The structure is 133 ft (40.4 m) long and 39 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesSD036
CrossesGrace Coolidge Ck
Location1.8 W JCT Sd 79
RouteState Highway 36
Coordinates43.81699, -103.2281
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating103.6 US tons
Inventory rating62.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length133 ft (40.4 m)
Longest span36 ft (11 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic955 (2024)
Projected traffic1,558 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 SD036 over Grace Coolidge Ck built?

It was built in 1992, making it 33 years old in 2025.

What condition is SD036 over Grace Coolidge Ck 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 June 2023.

How much traffic does SD036 over Grace Coolidge Ck carry?

About 955 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is SD036 over Grace Coolidge Ck?

The structure is 133 ft (40.4 m) long with a longest span of 36 ft (11 m) and a deck 39 ft wide.

Who owns SD036 over Grace Coolidge Ck?

It is owned by the State Highway Agency.