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Nearby Bridges in NBI 2021: 1


CHALK HILL RD over MAACAMA CREEK (Route: 0)
Num: 20C0242x
Open: no restriction [A]
Built: 1915, Reconstructed: N/A [0000]
Historic: Bridge is eligible for the NRHP. [2]

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Rough Distance: 0 Miles (0 Kilometers)

Bridge Type
Main Span(s): Concrete [1] Arch - Deck [11]
Approach Span(s): Concrete [1] Tee beam [04]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 51.8 m = 170.0 ft
Main Spans: 1 at 33.5 m = 109.9 ft
Approach Spans: 4
Skew: 0
Width, Roadway: 4.9 m = 16.1 ft (1 Lanes) and Out-To-Out: 5.5 m = 18.0 ft for a 4.9 m = 16.1 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Sonoma County [097], California [06]
Owned by County Highway Agency [02], DOT District: 4
1 MI S OF SR 128
Condition
Deck: Good [7]
Superstructure: Fair [5]
Substructure: Good [7]
Loading
Design:
Operating: 29.2 metric ton = 32.1 tons ()
Inventory: 17.5 metric ton = 19.3 tons ()
Appraisal
Structural: Meets minimum tolerable limits to be left in place as is [4]
Deck Geometry: Basically intolerable requiring high priority of replacement [2]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Equal to present desirable criteria [8] and Bridge is scour critical; bridge foundations determined to be unstable. [3]
Inspections
Date: July 1999 [799] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 4 km = 2.5 mi
Traffic
ADT: 800 (2015) and Trucks: 1%
Future ADT: 419 (In 2040 )

Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S  - Dismantled and/or in storage. L -  Severe loss of historic integrity due to alteration.

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