Structure 61708000001515 · Yakima County, WA

Mc Daniel Lake RD over Rattlesnake Creek

Carries Mc Daniel Lake RD over Rattlesnake Creek, To Mc Daniel Lake.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT145 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

145 ft end to end: about 2 semi-trucks nose to tail. Lengths and the semi-truck 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.

Built1998rebuilt 2018
Length145.3 ft44.3 m
Daily traffic30counted 1995
Last inspectedSeptember 2023every 24 months

Location

StateWashington
CountyYakima
LocationTo Mc Daniel Lake
CarriesMc Daniel Lake RD
CrossesRattlesnake Creek
Coordinates46.80944, -121.06722

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length145.3 ft (44.3 m)
Max Span140.1 ft (42.7 m)
Deck Width16.7 ft (5.1 m)
Deck Area225.9 sq m
Main Spans1
Year Built1998 (reconstructed 2018)

Traffic

Avg Daily Traffic30 (1995)
Lanes On Bridge1

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number061708000001515

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.