HomeMy WebLinkAboutAgenda Bill 7.B-Attch08 09/13/2004•
CSW
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TEL: (707) 795 -4764
FAX: (707) 795 -0516
Off ce(d'cs%vsr2.com
CSW /Stuher- Stroeh Engineering Group, Inc.
Engineers land Planners • Surveyors • Landscape Archirecrs
File: 1.754.00
Date: September.11 2003
Irene Borba Senior Planner
City of Petal
P.O. Box 61
11 English Street
Petaluma, CA 94953 -0061
RE: RIVAS SUBDIVISION -1081 BANTAM WAY
Dear'Irene:
Please find enclosed replacement planset sheets and backup i ormatioato show a relocation of the
proposed dry fire'department connection detailed on the Fire Protection/ Water Supply plan (sheet
4 of 5). These items are submitted pursuant, to the„ August 18, 2003 .flow test by the City of
Petaluma, which showed adequate fire water supply, at the existing hydranvnear the end of Bantam
Way. The resubmittal of planset sheets and backup consists of twelve copies each of items #1 and
#2 and one copy each of item #3 listed below:
1. Preliminary, Grading, Drainage and Utility plan (sheet 3 of 5)
2. Fire Protection/ Water Sup ply °plan (sheet 4 of 5)
3. 8/19/03 Memorandum to Crai g 'Spaulding RE Bantam Way flow test on
8/18/03
•
In summary,-the City conducted a,flow test -at the end of.Bantam Way on August ,18, 2003, which
showed that 15:50 gpm at,20 available atthat location-(see FH #4 on planset sheet 4 of 5) when
Paula Lane Tank water elevation is at 18.75 ft (Tess than -full tank). TheAugust .18 flow test provides
evidence of substantially`more flow at 20 psi than was predicted�bythe City KYPIPE water model.
The City KYPIPE water infidel was used as a basis for fire flow calculations and apparently provides
a very conservative analysis; ie: the'C ty water model prediced gpm_at 12 psi at node 903 which
represents FH #4).
Item #3 (the memorandum) was provided to Craig Spaulding and copied to you and Michael Ginn
on 19/03. On August 20, I spoke with Craig Spaulding, who advised modifying the tentative map
application to show the: dry line Fire Department connection installation near the existing hydrant
1310 Redwood Way; Suite 200, Petaluma, California 9 4954
'E :\Ad- Pet \WP60\1 \(`OR \09 -15= 03.754 79,0 De Lonc AvenUe, Novato, Ql itorn'i:a 9494
ATTACHMENT 8
Y v
Irene Borba
September l,'5, 2003
Page' 2
CSW —
[St4
at the end -of Bantam. Way near , the -end—of existing City improvements (FH#4 on sheet 4 of
5). - This new location saves approximately 4501 f of 8" pip installation and Craig Spaulding
indicated the City Would benefit by nothaving 'so much construction in or near the ex I isting new City
street.
If you have any - tids - tions 9,;com ens nee 4splease,give a, call at(707)795-4764.
_
Sincerely,
C �'O E H EN -ERING GROUP, INC.
John J. Fi r - - tzGe a , Id. C.E. 32999
Consulting; Civil, Engineer
Enclosures
cc: Michael Co te SWICO Construction
•
E:\Ad.Pct\WP.60\1',COR\09-'1.5 754
DATE:
FILE:
TO:
FROM:
RE:
MEMORANDUM,
August 19, 200
Rivas Minor Subdivision
CrAi*g;Spai!,1dihg, -Petaluma City Engineer
Edie Robbins, 'CS,-,W,/St2'En Engineering Group
R.C.E. C 47827, Expires 12/31/03
Bantam Way flow 8/18/03
JJ
The following information' is p vided, . p e supportrefefdnced,CS'W/St calculations. The
TO to rovid
8/18/03 flow test data ig compared ioldata for hydrant #4 in the referenced fireflow c alculations in
Attachment 5. The following items are attached:'
Attachment 1 Conference notes indicating flow test data
Attachment 2 Diffuser Gauge, pressure to. flow conversion graph
�' Attachment 3 Bantain,.Way Flow Test Map
Attachment 4 FH flow test graph for hydrant at the end of Bantam Way
Data comparison toRiv.as Minor Subd' i "On"Fireflow Calculations, 11/01
Attachment 5 iv si
Attachment I is record-of flow test data.- Attachment 4 was created using Attachments I and 2. The
location of the test/floW hy.d6ntl on Aftachment3. Atta6hment,5provides the graphical analysis
which shows that previously,submitted, calculations are. valid when compared to, 8/18/03 test data.
Based on the 8/18/"03:floW test d ata
itJ& observed .that the.hydrahtatlhe-end ofBaniam Way is able to
flow at least 1500 gpmwithia
psixe. graphed,data - indicates , 15'50gpm at 20 psi for this
hydrant- see-Attachment4). Thishydr ant
I isr6ferenced at FH�4,inthd Rivas :Minor Subdivision Fireflow
Calculations. 11/01: Based on the City water model, which was used As a basis for the fireflow
calculations, wepreviouslybelieveditwas necessary tqgo a lower elevation in Bantam Way
in order to moe ftheflow IT500 gpin at 20 psi for usewith the dr'.v-.fireline;. With the field data
that we observeddn 8/18/63 providing,'ryide oe to�show there is n 1500gpinat20 psi kresidual atthelast
hydrant in Bantam Way; We. toxevisepl I ans to sh ow co nnection ofth dry fireline to FflA instead
ofFH,3. See-the. 8/4/03 Fire Protectfor�/Water Supply Plan - Proposed, planset sheet 4 of 5, for the
locations of Fh4 and.FK3.
.Please call if you have: airy 'questions. I can be reached at 707-665-2866 or edier@cswst2.com.
cc: Michael Ginn, Petaluma Fire Marshal, Petalurna, Fire Dep artment
Irene Borbal . 8'emor Planner'; Petaluma Planning. Department
.�\Qds2b\data\Ad-Pet\lnd \MEMO.wpd
ATTACHMENT H
Telephone Conversation
Date/Time: e?
Contact Company/Agency:
r
Follo -up -up Required? 'H No' Yes Follow-up By Whom &. By'Date:
,
BY:
cc:
2. 5.
3. 6,
CSW/STUBER-STROEH ENGINEERING GROUP, INC.
790'DeLongAvenue, N.Qva'fo,`CA 94'945 =3246 1 Telephone: (415) 8924763
1301 Redwood Suite 1.00 - Petaluma, CA 94954 Telephone: (707) 795-4764
CONFERENCE NOTES
® Conference Memo
❑ ^ Job Conference
Job #: t j Job Name:' IV I
G OAIY\ Phone #:
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