Letter to DOH with Supporting Doc 050208City of Yelm
Community Development Department
IQ5 Yelm Avenue West
P.O. Box 479
Yelm, WA 98597
April 28, 2008
Regina Grimm PE
Department of Health
Office of Drinking Water Regional Engineer
PO Box 47823
Olympia, WA 98504
Subject: City of Yelm Water System ID#99350
Forrester Heights Booster Station, ODW Project #07-1101
Response to Comment Letter Dated January 7, 2008
Dear Mrs. Grimm:
The City of Yelm is presenting a revised set of construction drawings and a project
report for the above referenced project. These documents have been revised by KPFF
and resubmitted to the City of Yelm for review prior to this submittal to the Department
of Health. Upon receipt of the plans and a subsequent water hammer analysis we are
satisfied that all comments from your review letter were addressed. The following is an
item by item response for the 5 comments that were made in your January 7th letter to
KPFF Consulting Engineers.
The operating sequence of the pumps has been clarified in the project report.
The three larger pumps will alternate the led/lag position to equalize the run time
on all the pumps.
2. The plans and report have been updated to include the remote terminal unit to
connect to the City of Yelm's Telemetry system.
3. A sample tap at the booster station, a common suction side pressure gauge and
check valves on the discharge side of the pumps have been shown in the
booster station design.
4. There has been an exhibit added to Appendix E of the report showing the City of
Yelm's 2002 Water Service Area. This exhibit shows the project location and the
booster station location within the project boundaries.
(360) 458-8438
(360) 458-3144 FAX
u~wul,ciyelm,wa.us
5. The addition of a booster pump to serve the subject portion of Yelm's Water
Service Area was not specifically identified as a project in the Yelm's current
Water System Plan, but booster pumps are specifically identified in Chapter 7 of
the Yelm Water System Plan as distribution-related projects which can be
approved through the development of design and construction standards.
The City intends that the plans for the booster pump being currently being
reviewed will become the design and construction standards for both the current
project as well as future booster pumps, if needed elsewhere in the Yelm Water
Service Area to maintain adopted performance standards as found in Section 3
of Chapter 7 of Yelm's Water System Plan.
At this time I am unaware of any other outstanding comments or concerns for this water
booster station proposal. After reviewing this information if you have any additional
questions or any of the responses were not completed please contact me at (360) 458-
8438 or by email at jimg@ci.yelm.wa.us
Respectfully,
~_ _ ~
Jim Gibson P.E.
Community Development Department
Gopy Stephanie Ray, City of Yelm
Tim Peterson, City of Yelm
Grant Beck, City of Yelm
Clint Pierpoint, KPFF
enc. 2 -Revised Booster Station Report dated March 11, 2008
2 -Revised Booster Station Construction Plan sets dated March 11, 2008
1 -Copy of January 7t" DOH Comment Letter
Page 2 of 2
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Nicholas Taylor
KPFF Consulting Engineers
4200 6`'' Avenue, Suite 309
Lacey, Washington 98503
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Subject: City of YeIrn Water System, ID #99350, Thurston County; Forrester Heights
Booster Pump Station, OD~'~ Project #07-1 l 0l
Dear Mr. Taylor:
The Office of Drinking Water {ODW) has completed its review of the above project received on
October 29, 2001. This project is for a new booster pump station that will serve approximately
24 single-family residential lots. The following comments must be addressed before I can
complete my review.
1. Please clarify the operating sequence of the pumps. It would be a good idea to have the
pumps alternate in lead/lag position., This will reduce wear on an individual pump and
extend the pump life.
2. OI?W recommends installation of an autodial system that notifies the office or operator if
an alarm is sounded at the booster station. The visual and auditory alarms onsite may not
be noticed very quickly.
3. Please include a sample tap at tl~e booster station, a common suction side pressure gauge,
and check valves on the discharge side of the pumps.
4. Please include a snap showing tl~e location of the pump station acid the development
being served with respect to the service area and Urban Growth Area.
S. Based on a review of the City of Y~elm's current Water System Plan (WSP} (approved in
2002), I was not able to find where this booster station project was identified. Please
clarify if this project was included in the 2002 WSP, WAC 246-290-I l0 {3}requires
project reports submitted for approval must be addressed in the WSP. If it is i~ot
addressed in the WSP then additional requirements will apply.
~~
Nicholas Taylor
January 7, 2Q08
Page 2
Regulations establishing a schedule of fees for review ofplanning, engineering, and construction
documents were adapted July I, 2004, (WAC 246-29Q-990). ~ itemized invoice far $1,206 is
enclosed.
If you have any questions please contact xne at (360} 236-3035 or by e-mail at
regi n a. grimm@doh . wa. gov.
Sincerely,
~~~~
REG A N. GRIMM, P. E.
Qffice of Drinking Water Regional Engineer
Enclosures
cc: Edward Smith, City of Yelm
Forrester Heights, LLC
Jim Goode, Thurston County Health Department
Linda Kildahl, t~DW
Bonnie Waybright, QDW
- CHAPTER 7
DISTRIBUTION FACILITIES DESIGN AND CONSTRUCTION
STANDARDS
INTRODUCTION
The purpose of this chapter is to describe water system standards for distribution facilities design
and construction, and provide guidance to the City enabling them to utilize an alternative
approval process for fixture improvements to the water system. With advanced approval of design
and construction standards along with an approved water system plan, the City of Yelm does not
need to obtain written D4H approval of individual. project reports and construction documents for
projects relating to distribution mains and other distribution-related facilities. The City must still
comply with ail applicable sections of the regulation, including project report and construction
document requirements listed under WAG 246-290-110 and -120, whether or not documents are
submitted to DOH far approval. The City should verify applicability far this submittal exception
process at the preplanning conference or by contacting the DOH regional engineer.
Distribution-related projects eligible under the alternative approval process include distribution
reservoirs f storage tanks, booster pump facilities, transmission mains, distribution mains, pipe
linings and tank coatings. Sources of supply and water quality treatment projects are not eligible
under this alternative review process. Such projects must be submitted to DOH for review and
approval prior to construction. Source of supply projects refer to all work involving the
development of a new source or redevelopment of an existing source at the wellhead, interties,
_ and/or any project that would result in source capacity changes.
_ ~: .
- Design and construction standards are based on DOH design guidance and other documents
generally accepted by engineering professionals as containing fundamental criteria for design and
construction of water utility projects. The water system standards are at least as stringent as those
discussed in WAC Chapter 246-290 and do not deviate from department design guidance unless
adequately justified.
1. PROJECT REVIEW
The City of Yehn has developed standards and requirements pertaining to water line projects.
These standards are utilized in the City's project review process_ Typically during the review
process, the City's development review engineer or the Public Works Supervisor will review the
plans of the proposed project to verify that the project plans and specifications are consistent with
the City's construction and development standards as well as this comprehensive water plan. The
City has, in the past, used outside consulting engineers to review plans and specifications. The
City's development and construction standards are included in the appendix of this report.
2. POLICIES AND REQUIREMENTS FOR OUTSIDE PARTIES
The City has established policies and requirements for development /extension of the water
system by outside parties. Outside parties or "developers" making alterations to the system will
be required to abide by the policies and requirements included in the following documents.
City of Yelm Development Guidelines
City of Yelm and Thurston County Joint Growth Management Plan
City of Yeim 7-i Carnprehensive
2002 Water Plan
City of Yehn Ordinances: Chapter I3, Water and Sewer
The above policies include various requirements of system performance and development
standards included but not limited to right of way, looping requirements, minimum fire flow
requirements, Coordinated Water System Plans and level of service standards according to the
gowth management act.
3. DESIGN STANDARDS (Performance Standards and Sizing Criteria)
The hydraulic evaluation criteria are based an maintaining system pressure and velocity, as
defined in the DOH WAC 246-290-230 and in Group A Public Water Systems WaterwQrkr
Standards. The following criteria were used to evaluate the distribution system
• Maintain a minimum pressure of 30 psi in any point in the distribution system during PHD
conditions.
• Maintain a minimum pressure of 20 psi in any point in the distribution system during fire
flows under MDD conditions.
• Limit pipe velocities to approximately 8 fps.
• Limit main pressures in the distribution system to 100 psi.
• The minimum tine size is 8" far dead end lines and 6" for looped lines.
The future City distribution system shows the major line sizes required for meeting the
performance standards. Water tine sizes for projects within the "skeleton" system will be
determined on a case-by-case basis.
~- ~~ 4. CONSTRUCTION STANDARDS {Materials and Methods)
The City's development standards specifcally address the accepted materials and construction
methods regarding the water system. This includes equipment and material for:
Piping
Fittings -
Valves
Blow offs
Air and Vacuum Release valves
Disinfection Requirements
Meters
.anchoring systems
Thrust Blocks
Hydrants
Meter Setters
Water Line Testing
Taps
Meter Boxes
The City's development standards and details are included in the appendix.
5. CONSTRUCTION CERTIFICATION AND FOLLOW-UP PROCEDURES
The City ensures that water system distribution projects are constructed in accordance with the
water utility's construction standards by inspecting the construction, observing testing and
colIeeting Bac-T test results.
A DOH Construction Report for Public Water System Projects should be completed at the end of
each water system project. These can be obtained from the DQH's regional engineer.
City of Yelm Co rehensive
2402 7 2 mp
Water Plan
Construction records are to be submitted at the end of the project. Currently the data is filed with
the Public Warks Department. There is no procedure for updating the City system map in a
-- systematic way. It is recommended that, prior to project completion and acceptance, the system
map be updated for future use in comprehensive water plan updates.
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City of Yelm ?-3 Comprehensive
2002 Water Plan