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DWR_2717593
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Last modified
7/11/2017 11:09:13 AM
Creation date
3/3/2015 11:31:22 AM
Metadata
Fields
Template:
Dam Safety
Document Date
2/27/2015
Document Type - Dam Safety
Report
Division
5
Dam ID
040110
Subject
CARRIAGE HILLS #2 (LOWER) DAM - FAILURE FORENSIC REPORT REVISED
DWR Send/Recipient
DSB
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CARRIAGE HILLS NO. 2 DAM, Dam Failure Forensic Investigation Report Page 16 <br />February 27, 2015 <br /> <br /> Table 3: September 8‐17, 2013, Rain Totals (depth and volume) <br />Subbasin Area (sq. mi.) Total Rain Depth <br />(inch) <br />Total Rain Volume <br />(acre‐feet) <br />1 0.80 9.6 411 <br />2 1.55 9.6 792 <br />3 0.24 10.1 128 <br />4 0.12 10.4 66 <br />5 0.91 10.4 505 <br />6 0.11 10.7 66 <br />7 10.23 13.9 7,593 <br />8 1.49 11.1 882 <br />9 0.16 10.4 87 <br />Total 15.60 12.7 10,560 <br /> <br />7.1.2 Temporal Rain Data: AWA reported rain time series in Coordinated Universal Time (UTC); the DSB <br />subsequently converted all times to Mountain Daylight Time (MDT), local time at the time of the flood, for this <br />study. According to the AWA data, adjusted to MDT, rain began on the afternoon of Sept. 8, 2013 (Sunday). The <br />first inch of rain slowly accumulated on the Fish Creek basin by Sept. 11, 2013 (Wednesday) at 00:50 hrs. The <br />second inch of rain had fallen by Sept. 11, 21:10 hrs. The largest amount of rain (approximately 9.3 inches <br />averaged over the entire basin) fell between Sept. 11, 21:10 hrs and Sept. 13, 00:00 hrs (see Figure 8). A small <br />rain event followed on Sept. 15th. <br /> <br /> <br />Figure 8: Temporal mass curves corresponding to selected Fish Creek subbasins <br /> <br />9/11/13, 21:10 ‐ 9/12/13 04:00 <br />9/12/13, 22:00‐9/13/13 00:00 <br />9/12/13, 06:00‐14:00
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