US Bridges

Grizzly Pg over Grizzly Bear Creek

Good

Pennington County, South Dakota · T2S R6E Section 17 · Structure no. 020306000002008

Built
1973
52 years old, rebuilt 1987
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
33 ft
1 main span
Daily traffic
25
1992 count
Owner
Federal
U.S. Forest Service

About this bridge

Grizzly Pg over Grizzly Bear Creek is a wood or timber stringer/multi-beam or girder carrying Grizzly Pg over Grizzly Bear Creek in Pennington County, South Dakota. It was built in 1973 and reconstructed in 1987, so it is 52 years old, older 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 25 vehicles a day, projected to reach 37 by 2045. The structure is 33 ft (10.2 m) long and 19 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

CarriesGrizzly Pg
CrossesGrizzly Bear Creek
LocationT2S R6E Section 17
RouteFederal Lands Road 0
Coordinates43.87936, -103.43549
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.6 US tons
Inventory rating26.8 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length33 ft (10.2 m)
Longest span32 ft (9.7 m)
Deck width19 ft (5.8 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (1992)
Projected traffic37 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Grizzly Pg over Grizzly Bear Creek built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 1987.

What condition is Grizzly Pg over Grizzly Bear Creek 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 May 2023.

How much traffic does Grizzly Pg over Grizzly Bear Creek carry?

About 25 vehicles per day (1992 count).

How long is Grizzly Pg over Grizzly Bear Creek?

The structure is 33 ft (10.2 m) long with a longest span of 32 ft (9.7 m) and a deck 19 ft wide.

Who owns Grizzly Pg over Grizzly Bear Creek?

It is owned by the U.S. Forest Service.