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MDOT Bureau of Bridges and Structures provides a weekly-updated inventory of state-owned and local agency bridges in Michigan. The dataset includes structural details, condition ratings, and geospatial coordinates for each bridge, sourced from the National Bridge Inventory (NBI). Data is published by data.michigan.gov and was last updated on May 26, 2026.
By using this dataset, you are accepting the terms of use attached, though the specific license is not stated in the provided metadata.
| # | Column Name |
|---|---|
| 1 | ISD |
| 2 | Prosperity Region |
| 3 | NBI Indicator |
| 4 | Region - Item 2/B.L.04 |
| 5 | Length - Item 49/B.G.02 |
| 6 | Approach Span Material Type - Item 44A/B.SP.04 |
| 7 | Lanes on Structure - Item 28A/B.BH.08 |
| 8 |
| Latitude - Item 16/B.L.05 |
| 9 | Report Date |
| 10 | NHS Indicator Item 104/B.H.03 |
| 11 | LRS Mile Point Item 11/B.H.07 |
| 12 | Posting Status Item 41/B.IE.02 |
| 13 | Design Load - Item 31/B.LR.01 |
| 14 | Geo Reference |
| 15 | Structure Number - Item 8/B.ID.01 |
| 16 | Deck Condition Rating Item 58/B.C.01 |
| 17 | Substructure Condition Rating Item 60/B.C.03 |
| 18 | Culvert Condition Rating Item 62/B.C.04 |
| 19 | Year Painted - B.W.02 |
| 20 | Bridge Deck Area - B.G.16 |
| 21 | LRS Route ID Item 13/B.H.06 |
| 22 | Year Built - Item 27/B.W.01 |
| 23 | Facility Carried - Item 7/B.F.03 |
| 24 | Main Span Material Type - Item 43A/B.SP.04 |
| 25 | Superstructure Condition Rating Item 59/B.C.02 |
| 26 | Bridge Width Curb-to-Curb - Item 51/B.G.06 |
| 27 | Inspection Date Item 90/B.IE.02 |
| 28 | Transporation Service Center |
| 29 | Wearing Surface - Item 108A/B.SP.10 |
| 30 | Approach Span Design Type - Item 44B/B.SP.06 |
| 31 | Main Span Design Type - Item 43B/B.SP.06 |
| 32 | Main Span Count - Item 45/B.SP.02 |
| 33 | Total Spans - Item 45+Item 46/B.SP.02 |
| 34 | Feature Intersected - Item 6/B.F.03 |
| 35 | Owner - Item 21 + 22/B.CL.01 + 02 |
| 36 | Inspection Frequency Item 91/B.IE.05 |
| 37 | Longitude - Item 17/B.L.06 |
| 38 | County Boundaries |
| 39 | Structure Name |
| 40 | Lanes under Structure - Item 28B/B.BH.08 |
| 41 | Approach Span Count - Item 46/B.SP.02 |
| 42 | Bridge Width Out-to-Out - Item 52/B.G.05 |
| 43 | Year Overlaid - B.W.02 |
| 44 | Year Reconstructed - Item 106/B.W.02 |
| 45 | Location - Item 9/B.L.06 |
| 46 | Service Type On - Item 42A/B.F.01+2 |
| 47 | Service Type Under - Item 42B/B.F.01+2 |