HomeMy WebLinkAbout10 Attachment 1 Sample Fire Flow Response Letter 11570 Donner Pass Road, Truckee, CA 96161‐ Phone 530‐587‐3896‐ www.tdpud.org
February 8, 2022
Ms. Jane Doe
111 Main Street
Nowhere, California 90000
Dear Ms. Doe:
The Truckee Donner Public Utility District (District) has received the Single Family Residence
Project Data Sheet for the planned residence at 123 Donner Pass Road. The District has reviewed
the data sheet and evaluated the water distribution system in this area.
The District has determined that the existing system cannot provide the necessary fire sprinkler
demands at the downstream side of the existing meter box. There are three options available in
regards to providing water service to this property:
• A 3/4" meter could be installed in an upgraded meter box with a configuration that reduces
pressure loss. Such a layout is shown on the attached figure entitled “METER BOX
UPGRADE AT 123 DONNER PASS ROAD.” With this meter box upgrade, the District
could provide the pressures listed below at the downstream end of the meter. This option
is subject to a $600 meter box upgrade fee.
Flow Rate Available Pressure at
Downstream End of Meter
0 gpm 60 psi
27 gpm 46 psi
32 gpm 42 psi
40 gpm 33 psi
45 gpm 27 psi
• A 1" meter could be installed in an upgraded meter box with a configuration that reduces
pressure loss. Such a layout is shown on the attached figure entitled “METER BOX
UPGRADE AT 123 DONNER PASS ROAD.” With this meter box upgrade, the District
could provide the pressures listed below at the downstream end of the meter. This option
is subject to a $600 meter box upgrade fee.
General Manager Board of Directors
Brian C. Wright Joseph Aguera
Executive Leadership Team Jeff Bender
Joe Horvath, Electric Utility Director/ AGM Christa Finn
Shanna Kuhlemier, District Clerk Tony Laliotis
Steven Poncelet, PIO & Strategic Affairs Director Kim Harris
Michael Salmon, Chief Financial Officer
11570 Donner Pass Road, Truckee, CA 96161‐ Phone 530‐587‐3896‐ www.tdpud.org
Flow Rate Available Pressure at
Downstream End of Meter
0 gpm 60 psi
27 gpm 52 psi
32 gpm 50 psi
40 gpm 45 psi
45 gpm 42 psi
• An on-site system that includes sufficient storage capacity to meet the fire sprinkler needs
could be installed. In this case, upgrades to the existing facilities will not be required and
a 5/8” x 3/4" meter would be installed. There is no additional charge associated with this
option.
Please note that installation of backflow prevention equipment is required under either option. The
attached figure entitled “PIPING SCHEMATIC FOR 123 DONNER PASS ROAD WITH FIRE
SPRINKLER SYSTEM CONTAINING ANTI-FREEZE” shows a typical system layout.
It is suggested you review these potential solutions and determine which approach will be the most cost
effective. It is also strongly recommended that 2” diameter pipe be utilized for the customer‐owned
portion of the service lateral from the meter box to the structure if you opt to proceed with either the
3/4" or 1” meter options.
If you have questions or require further information please contact me at 530-582-3950. Please
note that the information given in this letter is based upon the District’s as-built drawings and
system maps. The District is unable to field verify the configuration of the existing meter box due
to the amount of snowpack at the project site. In the event that actual field conditions differ
significantly from those shown on the attached figures, please contact me immediately.
Sincerely,
Neil Kaufman, P.E.
Water System Engineer
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