hydrant testing for hydraulic model calibration technical
TRANSCRIPT
APPENDIX K
Hydrant Testing for Hydraulic Model Calibration Technical Memorandum, West Yost Associates
December 7, 2015
6800 Koll Center Parkway, Suite 150 Pleasanton, CA 94566 Phone 925 426-2580 Fax 925 756-5991 westyost.com
MEMORANDUM
DATE: December 7, 2015 Project No.: 418-02-14-36
SENT VIA: EMAIL
TO: Jack Bond, City of Modesto
CC: Glenn Prasad, City of Modesto
Miguel Alvarez, City of Modesto
FROM: Roberto Vera, RCE #83500
REVIEWED BY: Polly Boissevain, RCE #36164
SUBJECT: City of Modesto – Water Master Plan
Hydrant Testing for Hydraulic Model Calibration
This memorandum summarizes the proposed hydrant tests and testing procedures required to
calibrate the hydraulic model of the City of Modesto’s (City) existing contiguous water system.
This work is being conducted as part of the Water Master Plan project, and provides a plan for the
collection of the necessary field data. West Yost Associates’ (West Yost) recommended program
for hydrant testing is summarized below and provided for your review and comment.
HYDRANT TESTING PROGRAM
The hydrant testing program will be used to confirm and “spot-check” the roughness factors
(C-factors) that are assigned to pipelines in the City’s hydraulic model. West Yost will use data
collected directly through hydrant testing to verify if the current pipeline C-factors assigned in the
City’s hydraulic model are appropriate. Depending on this field testing to determine representative
C-factors by pipeline material type and pipeline age, pipeline C-factors may be adjusted in the
hydraulic model to better reflect field conditions.
Details related to the hydrant testing program are divided into the following four separate categories
and are discussed in more detail below:
• Personnel and System Data Requirements
• Hydrant Testing Schedule
• Testing Requirements and Procedure
• City Responsibilities
Mr. Jack Bond
December 7, 2015
Page 2
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Personnel and System Data Requirements
West Yost would like to request the following City personnel, system data, and supporting
documents to accomplish the recommended hydrant testing program under West Yost’s direction:
• A minimum of four City staff members (with vehicles and radio communications) that
will be available during regular working hours to assist with, but not limited to, the
following:
Closing and re-opening valves, as needed before and after hydrant testing,
Reading and recording hydrant pressure data,
De-chlorination at the flowing test hydrant,
Flowing the test hydrant,
Directing and controlling traffic, and hydrant flows, as necessary, to ensure safety
during these hydrant flow tests, and direct this discharged water into the nearest
drainage system during each test, and
Public outreach and interface, as necessary.
• System information before and during the hydrant testing period that includes the
following:
City’s SCADA system information for:
❖ Tank levels (water surface elevations),
❖ Booster Pump Stations (pump operational status, speed settings, discharge
pressures, and flows),
❖ MID Turnout (pump operational status, speed settings, discharge pressures, and
flows at Terminal Reservoir booster pump station), and
❖ Well Status (discharge pressure, flow, and speed settings, where applicable).
If the City’s SCADA system does not provide for historical archiving of these data,
or it is not possible to get this information in digital format, then manual readings at
key zone facilities that affect zone supply will need to be taken before, during, and
immediately after each hydrant test.
• One copy of the City’s Health and Safety Plan for testing hydrants.
It should also be noted that the City’s Fire Department conducts hydrant testing for their own use.
City staff has indicated that in the event that City Operations (Ops) Staff are not available to assist
with hydrant testing, it may be possible to reach out to the City Fire Department to help supplement
City Ops Staff. The City will be responsible for determining whether there is sufficient City Ops
Staff available to help conduct the hydrant testing or if additional staff from the City’s Fire
Department will be required.
Mr. Jack Bond
December 7, 2015
Page 3
Hydrant Testing Schedule
West Yost requests that the hydrant testing be scheduled during regular working hours at the City’s
earliest convenience. West Yost will meet with City staff at the beginning of each day to have a
brief field coordination meeting to review hydrant testing procedures and protocol (i.e., where to
go and what to do). West Yost will also use this coordination meeting to distribute pressure gauges
(hydrant wrenches to be provided by the City) necessary to complete the hydrant testing program.
Hydrant testing should continue on subsequent days until completion of the proposed
20 hydrant tests, anticipated to take approximately 2 full days.
Testing Requirements and Procedure
West Yost would like to conduct approximately twenty (20) hydrant flow tests, nineteen (19) within
the City’s existing contiguous service area and one within the Del Rio outlying service area. In
addition, two (2) alternative locations have been identified, if time permits, for a total of 22
proposed hydrant tests. Table 1 lists the 22 proposed hydrant test locations, which are also
illustrated on Figure 1. As shown on Figure 1, the selected hydrants are distributed throughout the
existing water service area and the Del Rio outlying service area; and were selected based on a
specific pipeline diameter, age, and material type, as summarized in Table 1. Table 1 also includes
additional details specific to each hydrant test related to the number of closed valves required to
conduct the test, whether the test is located near drainage features (e.g. parks, storm drain basins,
open lots, etc.), and if the test is a repeat test1.
Each hydrant test will involve maintaining flow from a single hydrant, while monitoring the
residual pressures at two to four observation hydrants located near the flowing hydrant. The field
observed static and residual pressure readings would then be used to confirm or adjust pipeline
C-factors to calibrate the hydraulic model to observed conditions. Hydrant test locations have been
selected to isolate pipelines of a particular material type, diameter, and age and some tests will
require that City personnel close one or more isolation valves prior to the test and re-open these
isolation valves following the test.
The general testing procedure at each of the hydrant test locations is outlined below and illustrated
on Figure 2. In addition, if GPS equipment is available, provided either by the City or by West Yost,
record the spatial location (XY coordinates and elevation) at the base (i.e. ground elevation) of the
flowing hydrant. Spatial location is important during the calibration effort because it confirms the
location and elevation at the flowing hydrant.
Step 1. Before the test, flush the test (flowing) hydrant and each observation hydrant
before attaching the pressure gage. (This allows sediments, which might
damage the gage or cause faulty readings, to be flushed out from the hydrant.)
Step 2. Attach the pressure gage to the hydrant with the gage’s test cock valve open.
Slowly open the hydrant and bleed off the gage with the gage’s test cock until
the hydrant is fully pressurized.
1 Tests identified as a “Repeat Hydrant Test” are repeat tests from the Hydraulic Model Calibration effort conducted
by West Yost in 2003. The purpose of repeating the hydrant test is to confirm or compare the assigned C-Factor
determined in the 2003 calibration effort.
o\c\418\02-14-36\wp\mp\hydantTM\061215_1
Mr. Jack Bond
December 7, 2015
Page 4
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Step 3. Close the gage test cock valve, and then measure the static pressures at the
designated test hydrant and each observation hydrant.
Step 4. Flow the designated test hydrant and measure the discharge flow and pressure.
Step 5. Measure the residual pressures at the designated test hydrant and at each
observation hydrant while the test hydrant is flowing.
Step 6. Continue monitoring pressure until the “all clear” is given by a West Yost
employee. Record the static pressure and then detach the pressure gage.
IMPORTANT: Before closing the hydrant, be sure the gage’s test cock valve
is open and bleeding while the hydrant is being closed.
At least one City staff member will be required at the flowing test hydrant and up to three (3)
additional City personnel will be required in the field to measure static and residual pressures at the
adjacent observation hydrants (refer to Attachment A). West Yost will provide two staff members
to direct, oversee, and assist in the field data collection work effort.
It is anticipated that each hydrant test will take no more than one half hour and that each hydrant
will be flowing for no more than 10 minutes during a test.
Testing Equipment West Yost will provide 2.5-inch and 4.5-inch diameter Swivel Piezo Diffusers and pressure gages
during the hydrant testing program. It is our recommendation that the 4.5-inch diameter Swivel
Piezo Diffuser be used for all proposed hydrant tests. For any hydrant test where it is not possible
to use this type of diffuser due to drainage or traffic control issues, an alternative method will need
to be further evaluated and confirmed before the day of field testing.
City Responsibilities
The City will be responsible for providing the following hydrant testing equipment:
1. Hydrant wrenches, and
2. Two-way portable communication for each of the testing personnel.
The City is also responsible for notifying other City staff and residents about the scheduled hydrant
testing, obtaining any approvals that may be required, providing proper drainage of the hydrant flow,
and providing equipment for de-chlorinating2 test water and personnel for traffic control, if required.
West Yost requests that City Ops staff review and inspect each of the proposed test locations before
the testing date to identify any potential problems or hazards with the selected locations. Of
particular concern will be the potential for flooding landscaping, building basements, or creating
hazardous traffic conditions. West Yost recommends that all drainage inlets/manholes be inspected
near the testing sites to confirm proper drainage. Additionally, location and status of valves that
will be closed during the hydrant testing should be checked. Detailed figures, which illustrate the
2 Handling of water released from each hydrant test will need to comply with the City Operations procedures and be
consistent with the City’s NPDES permit for planned releases from hydrant tests.
Mr. Jack Bond
December 7, 2015
Page 5
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flowing hydrant, observation hydrants, valves to be closed, and adjacent drainage features are
provided in Attachment A.
SUMMARY OF HYDRANT TESTING PROGRAM
Hydrant testing will be performed as described above during regular operations staff working hours.
The City is responsible for notifying other City staff including local residents/businesses about the
hydrant testing program and coordinating with the City’s Fire Department, as needed.
West Yost requests a conference call or meeting with City staff approximately two weeks before
the scheduled testing day to review and identify any potential issues that may occur during hydrant
testing such as unavailable SCADA system data. An Outlook meeting request will be sent to City
staff to schedule a suitable meeting date and time. In the meantime, please feel free to contact
Bobby Vera at 925-425-5624 if you have any questions or comments.
Mr. Jack Bond
December 7, 2015
Page 6
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Table 1. Hydrant Test Locations(a)
Test No.
Pipeline Material
Installation Year
Pipeline Diameter,
inches Location
No. of Closed Valves Comments(a)
1 AC 1973 6 Near the intersection of Ortega Rd. and Galvez Ave.
2 -
2 CI 1966 6 Along Kientiz Ave. near Steuden Wy. 2 -
3 AC 1992 8 Along Norik Dr. near Manor Oak Dr. 1 -
4 AC 1986 6 Along Pantaleo Dr. near Carmella Wy. 1 -
5 AC 1959/1965 6 Along Wycliffe Dr. near Scenic Dr. 2 Repeat Hydrant Test
6 AC 1989 6 Along Larned Ln. near Goodland Ct. 1 -
7 AC 1970 6 Along El Goya Dr. near N. Riverside Dr. 1 -
8 STL 1962 6 Along Moran Ave. near Phoenix Ave. 2 -
9 AC 1986 6 Along Albion Way near July Dr. 2 -
10 AC 1980 10 Along Jim Wy. Near Olivero Rd. 1 Repeat Hydrant Test,
Near Drainage Feature 11 AC 1981 8 Along Hanh Dr. near
English Oaks Dr. 2 Near Drainage Feature
12 CI 1939 6 Along Hilton St. near Enslen Ave. 2 -
13 CI 1959 6 Along Lauralee Ct. near Carver Rd. 1 -
14 CI 1977 6 Along Wellington Dr. near York Wy. 1 -
15 AC 1976 6 Along Rugby Ln. near Rexford Dr. 1 -
16 AC 1981 8 Along Elmo Loop near Snyder Ave. 1 Well 63 will need to be
offline 17 STL Unk(b) 8 Along River Rd. near
Herndon Rd. 3 -
18 PVC Unk(b) 8 Along Country View Dr. near Stonegate Dr. 2 Del Rio
19 STL 1945/2000 6 Along Paradise Rd. near Pauline Ave. 1 -
20 AC 1978/1986 10 Along Semallon Dr. near Virginia Corridor 3 Near Drainage Feature
21 AC 1980 6 Along Melgren Ave. near Gagos Dr. 1 Alternate location to be
tested, time permitting 22 PVC Unk(b) 8 Along Anada Ct. near
Greco Ln. 1 Alternate location to be testing, time permitting
(a) 20 Test Locations and 2 Alternate Test Locations. (b) Hydrant test will be used to confirm the C-Factor in this area, since age is not known.
0 1.50.75
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Figure 1 Proposed Hydrant Test
Location Map City of Mod e s to
Wate r Maste r P lanHyd rant Te st P lan
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ATTACHMENT A
Hydrant Test Location Sheets
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Figure A-1Test 1
(6" AC - 1973) City of Modesto
Water Master PlanHydrant Test Plan
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Figure A-2Test 2
(6" CI - 1966) City of Modesto
Water Master PlanHydrant Test Plan
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Figure A-3Test 3
(8" AC - 1992) City of Modesto
Water Master PlanHydrant Test Plan
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Figure A-4Test 4
(6" AC - 1986) City of Modesto
Water Master PlanHydrant Test Plan
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Figure A-5Test 5
(6" AC - 1959/1965) City of Modesto
Water Master PlanHydrant Test Plan
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Figure A-6Test 6
(6" AC - 1989) City of Modesto
Water Master PlanHydrant Test Plan
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ures\H
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t Tes
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#*
LA PALMA DR
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REL PASADO DR
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40
#7#7A
#7B#7C
Figure A-7Test 7
(6" AC - 1970) City of Modesto
Water Master PlanHydrant Test Plan
Last
Save
d: 6/1
5/201
5 5:40
:56 P
M O
:\Clie
nts\41
8 City
of M
odes
to\02
-14-36
Wate
r Mas
ter P
lan\G
IS\Fig
ures\H
ydran
t Tes
t Mem
o\Tes
t7_1.m
xd : b
vera
Symbology
*G!. Flow Hydrant
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VIOLA ST
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OAKS
HIRE
AVE
#8 #8A #8B
Figure A-8Test 8
(6" STL - 1962) City of Modesto
Water Master PlanHydrant Test Plan
Last
Save
d: 6/1
5/201
5 5:40
:19 P
M O
:\Clie
nts\41
8 City
of M
odes
to\02
-14-36
Wate
r Mas
ter P
lan\G
IS\Fig
ures\H
ydran
t Tes
t Mem
o\Tes
t8_1.m
xd : b
vera
Symbology
*G!. Flow Hydrant
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!( Closed Valve3 Valve
Test PipelinePipeline
" Storm Drain InletPark
3
!(
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OCTOBER WY
#9
#9A
#9B
#9C
Figure A-9Test 9
(6" AC - 1986) City of Modesto
Water Master PlanHydrant Test Plan
Last
Save
d: 12
/4/20
15 2:
56:32
PM
O:\C
lients
\418 C
ity of
Mod
esto\
02-14
-36 W
ater M
aster
Plan
\GIS\
Figure
s\Hyd
rant T
est M
emo\T
est23
.mxd
: bve
ra
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3
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#10
#10A
#10B
#10C#10D
Figure A-10Test 10
(10" AC - 1980) City of Modesto
Water Master PlanHydrant Test Plan
Last
Save
d: 6/1
2/201
5 12:5
7:27 P
M O
:\Clie
nts\41
8 City
of M
odes
to\02
-14-36
Wate
r Mas
ter Pl
an\G
IS\Fi
gures
\Hyd
rant T
est M
emo\T
est10
_1.m
xd : b
vera
Symbology
*G!. Flow Hydrant
G!. Observed Hydrant!( Hydrant
!( Closed Valve3 Valve
Test PipelinePipeline
" Storm Drain InletStorm Drain Basin
0 250125
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LOU
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DR
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#11B
#11
#11A
#11C
Figure A-11Test 11
(8" AC - 1981) City of Modesto
Water Master PlanHydrant Test Plan
Last
Save
d: 6/1
5/201
5 5:39
:50 P
M O
:\Clie
nts\41
8 City
of M
odes
to\02
-14-36
Wate
r Mas
ter P
lan\G
IS\Fig
ures\H
ydran
t Tes
t Mem
o\Tes
t11_1
.mxd
: bve
ra
Symbology
*G!. Flow Hydrant
G!. Observed Hydrant!( Hydrant
!( Closed Valve3 Valve
Test PipelinePipeline
" Storm Drain InletPark
!( 3
W RUMBLE RD
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DR
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DR
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ON ST
MARI
LYN
ST#12B
#12#12A
#12C
Figure A-12Test 12
(6" CI - 1939) City of Modesto
Water Master PlanHydrant Test Plan
Last
Save
d: 6/1
5/201
5 5:48
:42 P
M O
:\Clie
nts\41
8 City
of M
odes
to\02
-14-36
Wate
r Mas
ter P
lan\G
IS\Fig
ures\H
ydran
t Tes
t Mem
o\Tes
t12_1
.mxd
: bve
ra
Symbology
*G!. Flow Hydrant
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!( Closed Valve3 Valve
Test PipelinePipeline
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3
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#12
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#13B#13A
#13
Figure A-13Test 13
(6" CI - 1959) City of Modesto
Water Master PlanHydrant Test Plan
Last
Save
d: 6/1
2/201
5 1:00
:04 P
M O
:\Clie
nts\41
8 City
of M
odes
to\02
-14-36
Wate
r Mas
ter P
lan\G
IS\Fig
ures\H
ydran
t Tes
t Mem
o\Tes
t13_1
.mxd
: bve
ra
Symbology
*G!. Flow Hydrant
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0 300150
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S ST
ACADEMY AVE
LEXINGTON DR#14A
#14
#14B
Figure A-14Test 14
(6" CI - 1977) City of Modesto
Water Master PlanHydrant Test Plan
Last
Save
d: 6/1
2/201
5 1:11
:51 P
M O
:\Clie
nts\41
8 City
of M
odes
to\02
-14-36
Wate
r Mas
ter Pl
an\G
IS\Fi
gures
\Hyd
rant T
est M
emo\T
est14
_1.m
xd : b
vera
Symbology
*G!. Flow Hydrant
G!. Observed Hydrant!( Hydrant
!( Closed Valve3 Valve
Test PipelinePipeline
" Storm Drain InletPark
0 250125
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DYER
CT
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DR
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EDMONTON LN
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RD W
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#15C #15B
#15A
#15
Figure A-15Test 15
(6" AC - 1976) City of Modesto
Water Master PlanHydrant Test Plan
Last
Save
d: 6/1
2/201
5 11:0
9:19 A
M O
:\Clie
nts\41
8 City
of M
odes
to\02
-14-36
Wate
r Mas
ter P
lan\G
IS\Fig
ures\H
ydran
t Tes
t Mem
o\Tes
t15_1
.mxd
: bve
ra
Symbology
*G!. Flow Hydrant
G!. Observed Hydrant!( Hydrant
!( Closed Valve3 Valve
Test PipelinePipeline
" Storm Drain Inlet
0 200100
Scale in Feet
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#*
SNYDER AVE
SMOKEHOUSE AVE
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RD
AHWA
HNEE
CT
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OCK
LN
PAIONI CT
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ALVE
ILC T
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CT
ELMOLO OP
63
#16C
#16B
#16A
#16
Figure A-16Test 16
(8" AC - 1981) City of Modesto
Water Master PlanHydrant Test Plan
Last
Save
d: 6/1
2/201
5 1:36
:15 P
M O
:\Clie
nts\41
8 City
of M
odes
to\02
-14-36
Wate
r Mas
ter P
lan\G
IS\Fig
ures\H
ydran
t Tes
t Mem
o\Tes
t16_1
.mxd
: bve
ra
Symbology
*G!. Flow Hydrant
G!. Observed Hydrant!( Hydrant#* Active Well
!( Closed Valve3 Valve
Test PipelinePipeline
" Storm Drain InletPark
Well 63 will need to be manually shut downduring hydrant testing.
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#*
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VERDEA CT
214
#17A
#17
#17B #17C
Figure A-17Test 17
(8" STL - UNK) City of Modesto
Water Master PlanHydrant Test Plan
Last
Save
d: 12
/4/20
15 3:
07:11
PM
O:\C
lients
\418 C
ity of
Mod
esto\
02-14
-36 W
ater M
aster
Plan
\GIS
\Figu
res\H
ydran
t Tes
t Mem
o\Tes
t24.m
xd : b
vera
Symbology
G!. Observed Hydrant!( Hydrant#* Out of Service Well
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Test PipelinePipeline
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#*
COUNTRY VIEW DR
WOODSTONE DR
STON
EGAT
E DR
RIVER NINE DR
H ILL CRE ST DR
282
#18
#18B#18C
#18A
Figure A-18Test 18 (W Del Rio)
(8" PVC - UNK) City of Modesto
Water Master PlanHydrant Test Plan
Last
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d: 12
/4/20
15 3:
09:59
PM
O:\C
lients
\418 C
ity of
Mod
esto\
02-14
-36 W
ater M
aster
Plan
\GIS\
Figure
s\Hyd
rant T
est M
emo\T
est18
.mxd
: bve
ra
Symbology
G!. Observed Hydrant!( Hydrant#* Active Well
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Test PipelinePipeline
Note:1. It is recommended that Well 282 remain online during the test. However, during the hydrant test, water will need to be flushed for a slightly longer period of time until Well 282 has stabilized, since it is pressure controlled. 2. Well 282 will also need to be isolated from Stonegate Dr., as shown on the closed valve details on this figure.
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#19
#19A
#19B
Figure A-19Test 19
(6" St - 2000/1945) City of Modesto
Water Master PlanHydrant Test Plan
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5/201
5 5:29
:20 P
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8 City
of M
odes
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Wate
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ter P
lan\G
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ures\H
ydran
t Tes
t Mem
o\Tes
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ra
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*G!. Flow Hydrant
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#20B
#20A
#20
#20C
Figure A-20Test 20
(10" AC - 1978/1986) City of Modesto
Water Master PlanHydrant Test Plan
Last
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d: 6/1
5/201
5 5:37
:09 P
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:\Clie
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8 City
of M
odes
to\02
-14-36
Wate
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ter P
lan\G
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ures\H
ydran
t Tes
t Mem
o\Tes
t20_1
.mxd
: bve
ra
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*G!. Flow Hydrant
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#21B#21A
#21
#21D
Figure A-21Test 21
(6" AC - 1980) City of Modesto
Water Master PlanHydrant Test Plan
Last
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5/201
5 3:26
:40 P
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:\Clie
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8 City
of M
odes
to\02
-14-36
Wate
r Mas
ter P
lan\G
IS\Fig
ures\H
ydran
t Tes
t Mem
o\Tes
t21_1
.mxd
: bve
ra
Symbology
*G!. Flow Hydrant
G!. Observed Hydrant!( Hydrant
!( Closed Valve3 Valve
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" Storm Drain Inlet
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MELGREN AVE
0 250125
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O LN
PIRRONE RD
VECCHIO WY
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ANADACT
BAUME WY
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BACCHUS CT
PERLWEIN CT
#22D
#22C
#22B
#22A
#22
Figure A-22Test 22
(8" PVC - Unknown) City of Modesto
Water Master PlanHydrant Test Plan
Last
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d: 6/1
2/201
5 2:28
:29 P
M O
:\Clie
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8 City
of M
odes
to\02
-14-36
Wate
r Mas
ter P
lan\G
IS\Fig
ures\H
ydran
t Tes
t Mem
o\Tes
t22_1
.mxd
: bve
ra
Symbology
*G!. Flow Hydrant
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!( Closed Valve3 Valve
Test PipelinePipeline