Rating:
2 votes

Chalk Hill Road Bridge

Photos 

Chalk Hill Rd

Looking NW

Photo taken by Craig Philpott in August 2009

Enlarge

BH Photo #145407

Map 

Street View 

Facts 

Overview
Concrete arch bridge over Maacama Creek on Chalk Hill Road
Location
Sonoma County, California
Status
Open to traffic, bridge has significant structural damage
Future prospects
Replacement bridge planned on new alignment. May be left in place next to replacement.
History
Built 1915
Builders
- C. H. Gildersleeve of Napa, California
- Commonwealth Engineering Co. (Designer)
- Gildersleeve Construction Co. of Napa, California (Contractor)
Design
Open-spandrel concrete arch
Dimensions
Length of largest span: 109.9 ft.
Total length: 170.0 ft.
Deck width: 16.1 ft.
Recognition
Eligible for the National Register of Historic Places
Also called
Maacama Creek Bridge
Approximate latitude, longitude
+38.62194, -122.77389   (decimal degrees)
38°37'19" N, 122°46'26" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/519683/4274848 (zone/easting/northing)
Quadrangle map:
Healdsburg
Elevation
176 ft. above sea level
Inventory numbers
CA 20C-242 (California bridge number)
BH 11605 (Bridgehunter.com ID)
Inspection (as of 06/2015)
Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Good (7 out of 9)
Substructure condition rating: Good (7 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 58.2 (out of 100)
Average daily traffic (as of 2009)
800

Update Log 

  • April 23, 2013: Updated by Nathan Holth: Bridge is planned for bypass.
  • May 15, 2010: New Street View added by Craig Philpott
  • August 16, 2009: Updated by Craig Philpott: added builder

Sources