File:Title Sheet - Chapmanand-146;s Millrace, 438 South Mission Drive, San Gabriel, Los Angeles County, CA HAER CA-2305 (sheet 1 of 2).tif

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Title Sheet - Chapmanand-146;s Millrace, 438 South Mission Drive, San Gabriel, Los Angeles County, CA
Photographer
SWCA Environmental Consultants, Inc., creator
Title
Title Sheet - Chapmanand-146;s Millrace, 438 South Mission Drive, San Gabriel, Los Angeles County, CA
Depicted place California; Los Angeles County; San Gabriel
Date Documentation compiled after 1968
Dimensions 24 x 36 in. (D size)
Current location
Library of Congress Prints and Photographs Division Washington, D.C. 20540 USA http://hdl.loc.gov/loc.pnp/pp.print
Accession number
HAER CA-2305 (sheet 1 of 2)
Credit line
This file comes from the Historic American Buildings Survey (HABS), Historic American Engineering Record (HAER) or Historic American Landscapes Survey (HALS). These are programs of the National Park Service established for the purpose of documenting historic places. Records consist of measured drawings, archival photographs, and written reports.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

Notes
  • STORED ON SITE. mchr
  • Significance: The millrace is an unreinforced masonry water conveyance feature with a U-shaped plan made with procured stone and cement mortar. The structure consists of two millrace "walls," which contained the water flow, and a raceway "floor" that directed water flow toward the mill. It powered Chapman's Mill, the key innovation of which was its mechanization through the addition of gears, transferring wheel from vertical to horizontal, adjustable speed and torque, and adjustable millstone spacing for different grains, making the mill one of the first examples of the Industrial Revolution in California.
  • Unprocessed Field note material exists for this structure: N1438
  • Survey number: HAER CA-2305
  • Building/structure dates: ca. 1821- 1823 Initial Construction
References

Related names:

Chapman, Joseph
Cambon, Pedro Benito
Fernandez, Josef Angel
de Zalvidea, Jose Maria
de Sola, Pablo Vicente
SWCA Environmental Consultants, Inc., contractor
Christianson, Justine, transmitter
Source https://www.loc.gov/pictures/item/ca3988.sheet.00001a
Permission
(Reusing this file)
Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.
Other versions
Camera location34° 05′ 46″ N, 118° 06′ 18″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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Date/TimeThumbnailDimensionsUserComment
current03:45, 8 July 2014Thumbnail for version as of 03:45, 8 July 201414,398 × 9,888 (4.29 MB)Fæ (talk | contribs)GWToolset: Creating mediafile for Fæ. HABS 05 July 2014 (501:600)

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