Structure DAPAMCHOL000001 · Sullivan County, TN

Road 910 over Madd Creek

Carries Road 910 over Madd Creek, Holston Aap Plant A.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 3 of 9.

How ratings work
Deck4/9 · Poor
Superstructuresets the rating3/9 · Serious
Substructure5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT56 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9Superstructure 3/9 · sets the ratingSubstructure 5/9

56 ft end to end, longest span 18 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 multi-beam bridge.

Built195076 years old
Length56.1 ft17.1 m
Daily traffic50counted 2016
Last inspectedJuly 2022every 24 months

Location

StateTennessee
CountySullivan
LocationHolston Aap Plant A
CarriesRoad 910
CrossesMadd Creek
Coordinates36.53057, -82.55031

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length56.1 ft (17.1 m)
Max Span18.0 ft (5.5 m)
Deck Width25.9 ft (7.9 m)
Deck Area135.1 sq m
Main Spans3
Year Built1950

Traffic

Avg Daily Traffic50 (2016)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2022
Inspection FrequencyEvery 24 months
OwnerArmy
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure NumberDAPAMCHOL000001

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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