US Bridges

I029 S over 8th ST S Rc P&e RR

Fair

Brookings County, South Dakota · 0.9 S US 14 Interch · Structure no. 000000006184169

Built
1966
59 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
153 ft
3 main spans
Daily traffic
7,645
2024 count
Owner
State
State Highway Agency

About this bridge

I029 S over 8th ST S Rc P&e RR is a prestressed concrete continuous stringer/multi-beam or girder carrying I029 S over 8th ST S Rc P&e RR in Brookings County, South Dakota. It was built in 1966, so it is 59 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 fair condition with a lowest component rating of 6 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 7,645 vehicles a day, roughly 21% of them trucks, projected to reach 12,186 by 2044. The structure is 153 ft (46.7 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI029 S
Crosses8th ST S Rc P&e RR
Location0.9 S US 14 Interch
RouteInterstate 29
CountyBrookings County
StateSouth Dakota
Coordinates44.29841, -96.75879
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.4 US tons
Inventory rating43.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length153 ft (46.7 m)
Longest span51 ft (15.4 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,645 (2024)
Projected traffic12,186 by 2044
Trucks21%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$700,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I029 S over 8th ST S Rc P&e RR built?

It was built in 1966, making it 59 years old in 2025.

What condition is I029 S over 8th ST S Rc P&e RR 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 August 2023.

How much traffic does I029 S over 8th ST S Rc P&e RR carry?

About 7,645 vehicles per day (2024 count), of which roughly 21% are trucks.

How long is I029 S over 8th ST S Rc P&e RR?

The structure is 153 ft (46.7 m) long with a longest span of 51 ft (15.4 m) and a deck 34 ft wide.

Who owns I029 S over 8th ST S Rc P&e RR?

It is owned by the State Highway Agency.