Diamond Mill C217
Carrying Diamond Mill C217 over Bear Creek
.5 MILE SOUTH OF SR35, Montgomery, Ohio
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: Diamond Mill C217
The Diamond Mill C217 bridge in Montgomery, Ohio carries Diamond Mill C217 over Bear Creek. It was built in 1957, making it 69 years old today. The structure is built primarily of prestressed concrete and spans 1 section, stretching 19.5 meters (64 feet) end to end. Daily traffic averages 2,651 vehicles, placing it in the moderately-trafficked tier of Ohio bridges. It is owned and maintained by County 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. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 34.3 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How Diamond Mill C217 compares
Live comparison across Ohio.
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 How the historical reference is calculated.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
- 1957
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 19.5 m (64 ft)
- Deck Width
- 10.5 m (34 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 2,651 vehicles/day
- Structure Number
- 5740088
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 6/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • The superstructure (beams and supports above the deck) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • The substructure (piers and abutments) is in poor condition (4/9), showing advanced deterioration that may require priority repair.
How to read this record
Diamond Mill C217 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 Diamond Mill C217 against other structures in Montgomery and across Ohio. Ohio 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 Diamond Mill C217?
Diamond Mill C217 in Montgomery, Ohio 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 Diamond Mill C217 inspected?
Diamond Mill C217'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 2,651 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Diamond Mill C217 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 Diamond Mill C217?
Diamond Mill C217 has an NBI inventory load rating of 34.3 metric tons.
Who is responsible for maintaining Diamond Mill C217?
Diamond Mill C217 is owned and maintained by County Highway Agency.
How old is Diamond Mill C217 and does age affect safety?
Diamond Mill C217 was built in 1957, making it 69 years old.
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.