Big Gap Flume

Big Gap Flume (HM1007)

Location: Groveland, CA 95321 Tuolumne County
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Country: United States of America
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N 37° 49.124', W 120° 3.312'

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In 1859 a wooden suspension flume 2200' long was constructed across this valley by G.W. Holt and August Conrad as a link in the Golden Rock Ditch system which conveyed the water of the South Fork of the Tuolumne River to the mining areas of Groveland (Garrote) and Big Oak Flat. It was rightfully considered one of California's early day engineering marvels, and is said to have been the highest major flume constructed during the Gold Rush period.

The flume decayed and fell with a spectacular crash in 1868. In 1869 it was replaced by Andrew Rocca with an inverted syphon - the large iron pipe which still remains in place as a monument to pioneer enterprise.
HM NumberHM1007
Marker Number5-1975
Year Placed1975
Placed ByTuolumne County Board of Supervisors, Tuolumne County Historical Society
Marker ConditionNo reports yet
Date Added Saturday, October 18th, 2014 at 2:58pm PDT -07:00
Sorry, but we don't have a picture of this historical marker yet. The member who adopted this marker listing is responsible for adding pictures.
Locationbig map
UTM (WGS84 Datum)10S E 759209 N 4189789
Decimal Degrees37.81873333, -120.05520000
Degrees and Decimal MinutesN 37° 49.124', W 120° 3.312'
Degrees, Minutes and Seconds37° 49' 7.44" N, 120° 3' 18.72" W
Driving DirectionsGoogle Maps
Area Code(s)209
Closest Postal AddressAt or near 18752 Big Oak Flat Rd, Groveland CA 95321, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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Comments 1 comments

  1. it is still there, as is the pipe my great grandfather Andrew Rocca built in place.

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