Structure 28C0094 · Contra Costa County, CA

Monument BLVD over Walnut Creek

Carries Monument BLVD over Walnut Creek, At Mohr Lane.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT103 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 7/9

103 ft end to end. 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 multi-beam bridge.

Built196561 years old
Length103.0 ft31.4 m
Daily traffic33,600counted 2020
Last inspectedFebruary 2025every 24 months

Location

StateCalifornia
CountyContra Costa
LocationAt Mohr Lane
CarriesMonument BLVD
CrossesWalnut Creek
Coordinates37.94740, -122.05171

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length103.0 ft (31.4 m)
Max Span101.4 ft (30.9 m)
Deck Width76.1 ft (23.2 m)
Deck Area728.5 sq m
Main Spans1
Year Built1965

Traffic

Avg Daily Traffic33,600 (2020)
Truck Traffic5%
Lanes On Bridge5

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number28C0094

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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