Structure 3C0015 · Modoc County, CA

Estes Street over North Fork Pit River

Carries Estes Street over North Fork Pit River, 0.1 Mi N Parker Creek RD.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT81 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

81 ft end to end, longest span 30 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built197155 years old
Length81.0 ft24.7 m
Daily traffic620counted 2015
Last inspectedAugust 2023every 24 months

Location

StateCalifornia
CountyModoc
Location0.1 Mi N Parker Creek RD
CarriesEstes Street
CrossesNorth Fork Pit River
Coordinates41.48190, -120.53837

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length81.0 ft (24.7 m)
Max Span29.9 ft (9.1 m)
Deck Width34.1 ft (10.4 m)
Deck Area256.9 sq m
Main Spans3
Year Built1971

Traffic

Avg Daily Traffic620 (2015)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number03C0015

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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