I029 S
Carrying I029 S over BIG SIOUX RV
1 S BROOKINGS CO LINE, Moody, South Dakota
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: I029 S
The I029 S bridge in Moody, South Dakota carries I029 S over BIG SIOUX RV. It was built in 1966, making it 60 years old today. It was last reconstructed in 1996, extending its service life. The structure is built primarily of steel continuous and spans 4 sections, stretching 121.4 meters (398 feet) end to end. Daily traffic averages 7,880 vehicles, placing it in the moderately-trafficked tier of South Dakota bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 6/9, substructure at 4/9. The weakest component sits in poor condition. Because at least one major component scores 4 or lower, this bridge falls in FHWA's Poor condition category. That category is not a closure order. Its NBI inventory load rating is 30.9 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How I029 S compares
Live comparison across South Dakota.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1966
- Last Reconstructed
- 1996
- Material
- Steel Continuous
- Number of Spans
- 4
- Structure Length
- 121.4 m (398 ft)
- Deck Width
- 10.6 m (35 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 7,880 vehicles/day
- Structure Number
- 000000051065010
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • At 6/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • The substructure (piers and abutments) rates poor at 4/9, advanced deterioration that should be prioritized for repair.
How to read this record
I029 S is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare I029 S against other structures in Moody and across South Dakota. South Dakota bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for I029 S?
I029 S in Moody, South Dakota has a deck rating of 6/9, superstructure rating of 6/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is I029 S inspected?
I029 S's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 7,880 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. I029 S is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for I029 S?
I029 S has an NBI inventory load rating of 30.9 metric tons.
Who is responsible for maintaining I029 S?
I029 S is owned and maintained by State Highway Agency.
How old is I029 S and does age affect safety?
I029 S was built in 1966, making it 60 years old and last reconstructed in 1996.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.