It was submitted to the California Debris Commission and the California State Board of Reclamation. Givan, City Engineer of Sacramento and C.E. The second vital document providing critical data is the Statement Relating to the Flood Discharge of the American River (October 17, 1912) prepared by A. » See dataset for Leet and Goddard (1862) Folsom Canyon Cross-sections 1912 - Givan and Grunsky - Statement This will become clear as you read the documents. The Stockton and Coover stone stable is the key physical location for estimating American River flood peak discharges starting in 1862 until the stone foundation was removed by the construction of Folsom Dam in 1950's. Importance of Cross-section at Stockton and Coover Stone Stable We will use "Stockton and Coover stone stable" going forward. In other important documents vital to this modeling project, the names used to identify the surviving mill foundation are the "Stockton and Coover Mill Site" and the "Stockton and Coover Stone Stable." Stockton and Coover were the joint owners of the rebuilt mill in September 1862. It was thought to be "the first flour mill on the North American Pacific coast." The stone foundation survived the 1862 flood washing away the mill building which was rebuilt in 1862 and burned down in 1867. The name "Stockton mills" was used by Leet and Goddard to identify a location along the North Fork American River across and down river from where the Folsom State Prison was later built. , May 16, 1862, page 3, with quotation starting at top of 3 rd column from left and down to 6 th paragraph from top of column and accessed at California Digital Newspaper Collection] Stockton mills, Stockton and Coover Mill Site, or Stockton and Coover Stone Stable The sectional area of canon is only 10,782 feet, and yet, by reason of the great slope of 35.95 feet per mile, 0.0066 per foot giving a velocity of 46.49 feet per second, there was actually discharged the enormous amount of 501,294 cubic feet of water per second. We have the fall and distance from the Stockton mills above, and the hight of the floods at both points, from these we have deduced the following tables of velocity and discharge at this point. Leet and Goddard used the high water mark at the Stockton mills located upstream of the railroad bridge to compute the river channel slope and compute the water velocity to the railroad bridge cross-section.Īt this point we have a very accurate measurement of the canon at the railroad bridge at Folsom, a section of which is presented to your Board. However, the description by Leet and Goddard is sufficient for locating in Folsom canyon two cross-sections with 1862 high water elevations: Maps referenced in the report showing the locations of the cross-sections and the railroad bridge section mentioned below were not found. The report was submitted to the Board of Swamp Land Commissioners in Sacramento in May 1862 which offered engineering solutions to protect Sacramento from American River floods. Goddard, Consulting Engineer, in 1862 estimated the peak discharge at three cross-sections along the American River. Brief Description of Dataset Items 1862 - Leet and Goddard - Cross-sections in Folsom CanyonĪ report written by B.F.
#Sacramento flood map zip
Each item can be downloaded separately or the entire dataset can be download as a zip file. The assembled dataset for the modeling work consists of documents, reports, drawings, and photographs. Canon is the spelling of "canyon" used in 1862 and was usually written as cañon. The name "Folsom canyon" comes from a description in the 1862 report by Leet and Goddard described below. The Folsom canyon is a granite bedrock segment of the American River which runs beside Folsom State Prison and measures about 2.25 miles from Folsom Dam to Rainbow Bridge. Army Corps of Engineers (USACE), and U.S. Then use the modeling results to evaluate the various peak discharge estimates developed over the past 150+ years by engineers in 1862, U.S.
The idea is to use modern modeling tools on the available historic data. The idea is to do HEC-RAS modeling of a bedrock segment of the American River (identified as Folsom canyon in 1862) to estimate the peak discharge of Januflood and use the results to estimate the peak discharge at the USGS Fair Oaks gage downstream.
Estimates of the American River flood-peak discharge made in 1862 were found and the idea evolved to this point. I researched several topics when thinking about possible aspects of the 1862 flood for speakers to cover. This modeling idea came from working on the 2012 CEPSYM when the theme was: The 1861-1862 Floods: Informing Decisions 150 Years Later. (possible input to a HEC-RAS Model) Introduction Peak Discharge Data for Estimating 1862 American River Flood
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