HomeMy WebLinkAboutCT 02-16; ROBERTSON RANCH EAST VILLAGE; TRENCHING CALCULATION FINDINGS; 2008-04-10 (2)CO NSULTA NTS
Civil Engineering Surveying
April lo,2008 REcEIVED H
LN.011014-1 I:!
• Construction Inspector
Mr. Joe McMahon
I. L
2008
City of Carlsbad j l?R(,
5950 El Camino Real
Carlsbad, CA 92008
Dear Mr. McMahon:
Please see the enclosed exhibit for reference. Based on hydrologic calculations and field surveys
performed by O'Day Consultants on 3/4/08 through 3/6/08, 3/12/08 and 4/4/08, the following
table summarizes my findings:
V V
Basin
V V
Design Volume
(1)
Actual Volume
(CF)
Additional Volume
Provided (CF)
2 • 48,888 53,190(2) V 4,302
3 17,352 23,409(3) 6,057 V
4 37,188 • 45,819 V 8,631
5 • V 24,300 34,182 9,882 . V
7A 15,084 V 22,707 • V
V 7,623 -
7B 3,456 3,456 - V.
3,600 CF per tributary acre per Option 2 of Water Quality Order 99-08-DWQ
Assumes emergency spillway will be raised Moot to elevation 102.47
Assumes standpipe rim elevation to be raised 1 foot to elevation = 87.6
Very, truly yours,
O'DAY CONSULTANTS, INC.
George U a. y
Registered Civil B%er A No 32014'
cc: Don Mitchell
Greg McDonnel OF
N:\O1 1014\08041 0_McMahon2Itr.doc V
O'Day Consultants Inc. E-mail: oday@odayconsultants.com
2710 Loker Avenue West, Suite 100 Website: www.odayconsultants.com V
V
V
V • Carlsbad, California 92010-6609 Tel: 76093
1.
17700 Fax: 7609318680
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