Structure 65920300000000 · Menard County, IL

Or-3 over Rocky Branch

Carries Or-3 over Rocky Branch, New Salem State Park.

Overall conditionGood

Set by its lowest-rated component: Culvert at 8 of 9.

How ratings work
Culvertsets the rating8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 8/9

A culvert 26 ft across with 2 openings. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights, so those are drawn as typical for a culvert.

Built20188 years old
Length26.2 ft8 m
Daily traffic25counted 2020
Last inspectedDecember 2023every 48 months

Location

StateIllinois
CountyMenard
LocationNew Salem State Park
CarriesOr-3
CrossesRocky Branch
Coordinates39.97592, -89.84196

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length26.2 ft (8 m)
Max Span13.1 ft (4 m)
Deck Width44.0 ft (13.4 m)
Deck Area107.2 sq m
Main Spans2
Year Built2018

Traffic

Avg Daily Traffic25 (2020)
Truck Traffic80%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 48 months
OwnerState Park/Forest Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number065920300000000

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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