HomeMy WebLinkAbout18 Review of Martis Valley Groundwater Management Plan Annual Report AGENDA ITEM #18
Public Utility District m
MEETING DATE: August 2, 2023
TO: Board of Directors
FROM: Chad Reed, Water Utility Director
SUBJECT: Review of the Martis Valley Groundwater Management Plan Annual
Report
APPROVED BY:
Brian C. Wright, General Manager
RECOMMENDATION:
Receive and comment on the Martis Valley Groundwater Management Plan annual
report prepared by GEI's staff.
BACKGROUND:
The District has a long history of stewardship and collaboration in managing water
resources. A major tenant of local water resource management has been to use the
best available science to inform the decision-making process. This has resulted in
decades of monitoring and scientific study, including the Desert Research Institute's
Martis Valley groundwater model/report as part of the Federal Truckee River Basin
Study. This effort was supported by the District, Northstar Community Services District -
NCSD, and Placer County Water Agency - PCWA (Local Water Agencies) and was a
key component of the collaboratively adopted 2013 Martis Valley Groundwater
Management Plan (GMP).
In 2014, California passed into law the Sustainable Groundwater Management Act
(SGMA) which applied to all Medium and higher Priority basins (Martis Valley was at
the time designated Medium Priority). This, in effect, put the implementation of the 2013
GMP on hold. The District, PCWA, NCSD, Town of Truckee, Nevada County, and
Placer County (local SGMA agencies) in the Martis Valley Groundwater Basin (MVGB)
put forth an Alternative Submittal in December 2016 in compliance with SGMA. The
local SGMA agencies hired a licensed engineering firm (GEI Consultants) to certify the
MVGB Alternative Submittal.
The Alternative Submittal and supporting GEI Consultants report documents that the
MVGB has operated within its sustainable yield for at least 25 years. Subsequently, in
April of 2017, a first-year SGMA Annual Report was submitted while the ongoing review
by the California Department of Water Resources (DWR) of the Alternative Submittal
continued.
Page 1 of 3
Page 49 of 165
In early 2019, while the Alternative Submittal review still continued, DWR was required
to review basin prioritization. The MVGB was again initially prioritized medium but, upon
review and engagement with DWR by the local SGMA agencies, the MVGB was re-
prioritized to `Very Low' and was no longer required to comply with SGMA.
The local SGMA agencies agreed to formally withdraw the Alternative Submittal from
DWR consideration and to go back to the 2013 Martis Valley GMP framework, including
reconvening the Stakeholder Working Group which was active in the development of
the plan. It is believed that this local GMP framework is a much more effective and
efficient process to manage groundwater resources than the heavy hand of SGMA
regulation.
The three Local Water Agencies worked with our local partners to develop a plan to go
back to the GMP framework. This included updating the Stakeholder Working Group list
to reflect the local agencies or groups with a direct interest in Martis Valley groundwater
resources. In general, the stakeholders fall into three categories: local public agencies;
major water users/pumpers; and local non-profits/interest groups.
A GMP Stakeholder Working Group kick-off meeting was held on October 3, 2019,
where the three Local Water Agencies reviewed the 2013 Martis Valley GMP and the
key meetings and actions that would occur going forward. This includes an annual
report tracking the performance and long-term sustainability of the groundwater basin
along with an update to the GMP to occur during 2024. Given the significant amount of
work and reporting during the SGMA Alternative Submittal, it was agreed that the start
of the GMP would now be in 2019. It was also agreed that the first GMP annual report
would cover the past two water years (October - September 2017/2018 and 2018/2019)
which would provide continuity from the last SGMA annual report. This GMP annual
report was conducted over the winter months with the annual Stakeholder Working
Group meeting in the spring to review the results.
The Local Water Agencies solicited a proposal from GEI Consultants who had
previously done work in the Martis Valley on sustainable yield, the SGMA Alternative
Submittal, and the SGMA Annual Report. GEI Consultants is very familiar with both the
Martis Valley and the Local Water Agencies. The Local Water Agencies have decided
to keep the presentation of the annual report on a Spring cycle and secured a proposal
from GEI to prepare an annual report covering water years 2019/2020 and
2020/2021. The annual report included in this staff report is for October 1, 2021,
through September 30, 2022, which is denoted as water year (WY) 2022. The District's
Board awarded a contract to GEI Consultants at the November 2, 2022 Board meeting
for a total not to exceed the amount of $23,650 which to be split equally amongst the
Local Water Agencies.
ANALYSIS AND BODY:
The Local Water Agencies continue to pursue the GMP framework as the best way to
manage and steward the Martis Valley groundwater resources. The GEI Consultants'
annual report has been completed (See Attachment 1) and the Stakeholder Working
Group meeting was held at the Truckee Donner Public Utility Districts headquarters on
Page 2 of 3
Page 50 of 165
Wednesday, June 28, 2023. The meeting included attendance and a presentation on
the annual report results by GEI's lead technical expert. Below are key highlights:
WY '22 received approximately 26 inches of precipitation, which is only slightly below
the 28.77 inches classified as normal per the Truckee Ranger Station. In contrast, WY
'21 was one of the driest years on record. This significant difference in a wetter year
has caused "groundwater levels throughout the Basin (to) increase". Groundwater
usage was also reduced for the same period of time by 700 acre-feet (AF), which
allowed all "monitoring wells remained above their lowest measure groundwater levels"
for WY 2022.
In an effort to both increase the resolution of the well monitoring and capture seasonal
variation, monthly monitoring has voluntarily been implemented by the local water
districts starting in 2018. During WY 2022, the "total groundwater pumping in the Basin
was 6,900 acre-feet (AF)". Which was a decrease of 14% or approximately 700 AF,
when compared to WY 2021. The net change of groundwater storage for WY 2022 was
an increase of approximately 6,000 AF, whereas during WY 2021 the storage declined
by about 6,800 AF. This would denote that the Basin largely recovered in WY 2022
from WY 2021, due to the higher precipitation and that precipitation significantly
impacts the basin. The 6,900 AF of groundwater extracted during WY 2022 from the
Basin is significantly less than the published safe yield of 23,000 AF per year. The
MVGB GMP data indicates the basin is very responsive to normal-heavy precipitation
water years and is recovering nicely from the previous droughts. Due to the holistic
approach of partnering with different agencies in the Martis Valley Groundwater Basin
and utilizing the best science, the basin is being managed in a sustainable and resilient
manner.
GOALS AND OBJECTIVES:
District Code 1 .05.020 Objectives:
1. Responsibly serve the public.
3. Provide reliable and high-quality water supply and distribution system to meet
current and future needs.s.
5. Manage the District in an environmentally sound manner.
District Code 1 .05.030 Goals:
1. Manage for Financial Stability and Resiliency
2. Environmental Stewardship: Create a sustainable, resilient environment for all our
communities.
FISCAL IMPACT:
No additional fiscal impact is associated with this item.
ATTACHMENTS:
1. Annual Report for the Martis Valley Groundwater Basin Water Year 2022
Page 3 of 3
Page 51 of 165
r
s •�.i
dM
.- - Asti � y�'.•:'�" �.Y� � .
GEI Consultants
Consulting
Engineers and
Scientists
Martis Valley Groundwater Basin Annual Report
Water Year 2022
Prepared for:
Truckee Donner Public Utility District
On behalf of Truckee Donner Public Utility District, Northstar Community Service District,
and Placer County Water Agency collectively referred to as the MVGB Agencies.
Prepared by:
GEI Consultants
2868 Prospect Park Drive, Suite 400
Sacramento, CA 95670
June 22, 2023
Page 53 of 165
TRUCKEE DONNER PUBLIC UTILITY DISTRICT
MARTIS VALLEY GROUNDWATER BASIN ANNUAL REPORT
WATER YEAR 2022
Certifications and Seals
This report and analysis was prepared by the following GEI Consultants Inc.professional geologists.
Report sections contained herein based on available data and were prepared by:
Date: June 22, 2023
S Storey --
Geologist-hi-Training No. 812
"AL
OF �Fo
aD H
HYDF14[iBCLMI�f
CF CA►-IF44
Date: June 22, 2023
Richard W. Shatz
Principal Hydrogeologist
California Certified Hydrogeologist
C.H.G. No. 84
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 i
Page 54 of 165
[This page intentionally left blank.]
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 ii
Page 55 of 165
Table of Contents
Tableof Contents ......................................................................................................................................................i
Abbreviations and Acronyms.................................................................................................................................iii
ExecutiveSummary............................................................................................................................................ES-1
1. Introduction................................................................................................................................. 1-1
1.1 Martis Valley Groundwater Basin.................................................................................... 1-1
1.2 Climatic Conditions.......................................................................................................... 1-2
1.3 Surface Water Conditions................................................................................................ 1-2
2. Groundwater Conditions ........................................................................................................... 2-1
2.1 Groundwater Levels ........................................................................................................ 2-1
2.2 Groundwater Flow........................................................................................................... 2-7
3. Groundwater Extraction............................................................................................................. 3-1
4. Surface Water Diversions.......................................................................................................... 4-1
5. Groundwater Recharge.............................................................................................................. 5-1
6. Total Water Use .......................................................................................................................... 6-1
7. Change in Groundwater Storage .............................................................................................. 7-1
8. Groundwater Management Activities....................................................................................... 8-1
9. Conclusions................................................................................................................................ 9-1
10. References ................................................................................................................................ 10-1
Attachment A. Monitoring Well Hydrographs................................................................................................. 10-3
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 i
Page 56 of 165
List of Figures
Figure 1-1. Martis Valley Groundwater Basin Location .................................................................................. 1-3
Figure 1-2. Annual Precipitation Deviation from Mean: Truckee Ranger Station No. 049343 for 1988 to 2022
...................................................................................................................................................... 1-5
Figure 2-1. Martis Valley Groundwater Basin Monitoring Well Locations....................................................... 2-3
Figure 2-2. Martis Valley Groundwater Basin Historical Groundwater Level Elevations, Water Years 1989-
2022.............................................................................................................................................. 2-5
Figure 2-3. Martis Valley Groundwater Basin Historical Groundwater Level Elevations, Water Years 2015-
2022.............................................................................................................................................. 2-6
Figure 2-4. Martis Valley Groundwater Basin Spring 2022 Groundwater Elevation Contours....................... 2-9
Figure 2-5. Martis Valley Groundwater Basin Fall 2022 Groundwater Elevation Contours.......................... 2-10
Figure 3-1. Martis Valley Groundwater Basin Locations of Groundwater Extractions.................................... 3-3
Figure 3-2. Martis Valley Groundwater Basin Community Water System Monthly Pumping Totals.............. 3-5
Figure 7-1. Martis Valley Groundwater Basin Change in Groundwater Elevation, Spring 2021-Spring 2022 7-3
Figure 7-2. Estimated Change in Storage and Groundwater Use.................................................................. 7-6
List of Tables
Table 3-1. Groundwater Pumping for Water Year 2022 (values in acre-feet)............................................... 3-2
Table 4-1. Surface Water Usage Reported for Water Year 2022 (values in acre-feet)................................. 4-1
Table 5-1. Estimated Groundwater Recharge from T-TSA for Water Year 2022 (values in acre-feet)......... 5-1
Table 6-1. Total Water Use for Water Year 2022 (values in acre-feet)......................................................... 6-1
Table 7-1. Estimated Change in Storage....................................................................................................... 7-1
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 ii
Page 57 of 165
Abbreviations and Acronyms
AF acre-feet
Basin Martis Valley Groundwater Basin
CASGEM California Statewide Groundwater Elevation Monitoring
DWR California Department of Water Resources
GMP Groundwater Management Plan
MVGB Martis Valley Groundwater Basin
MVGB Agencies MVGB Local Water Agencies
NCSD Northstar Community Services District
SGMA Sustainable Groundwater Management Act
T-TSA Tahoe-Truckee Sanitation Agency
TDPUD Truckee Donner Public Utility District
TRBWG Truckee River Basin Working Group
TROA Truckee River Operating Agreement
TSD Truckee Sanitary District
WY water year
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 iii
Page 58 of 165
[This page intentionally left blank.]
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 iv
Page 59 of 165
Executive Summary
This report provides annual monitoring data and an assessment of groundwater conditions in the Martis
Valley Groundwater Basin (MVGB or Basin) for water year 2022. A water year (WY) is defined as
October through September of any year.
The MVGB does not have to comply with the Sustainable Groundwater Management Act(SGMA), as the
Basin was re-classified in 2018 as a very low priority basin. However, the MVGB Local Water Agencies
(MVGB Agencies) recognize the importance of groundwater management and are continuing to
implement their 2013 Groundwater Management Plan.
Groundwater levels, groundwater extractions, surface water conditions, groundwater recharge from
locally derived and imported wastewater, measured and estimated total water use, and groundwater
storage change estimates were compiled and analyzed. Climatic conditions were also evaluated as to their
effects on groundwater levels.
WY 2022 received about 26 inches of rainfall but slightly below normal, about 29 inches. Groundwater
levels throughout the Basin increased due to precipitation and subsequent reduced groundwater use. In
WY 2022, all monitoring wells remained above their lowest measured groundwater levels. The historical
record for these wells is limited as prior to 2017 monitoring was only done in the spring and fall, whereas
since then the participating agencies have substantially increased the intervals of measurement to monthly
at a minimum. The detection of the groundwater levels exceeding the lowest levels previously recorded
would not have been detected without the MVGB Agencies increasing groundwater level monitoring
frequency to a monthly and, in some cases, daily basis.
Total groundwater pumping in the Basin in WY 2022 was 6,900 acre-feet AF. Groundwater pumping in
the Basin decreased by about 14 percent, about 700 AF less compared to the previous WY 2021, which
was the driest year on record and required more reliance on groundwater pumping. Change in groundwater
storage for WY 2022 increased by about 6,000 AF, due to the decreased groundwater pumping(about 700
AF) and mostly from recharge of almost normal precipitation (about 5,300 AF). In comparison,
groundwater in storage declined by about 6,800 AF in WY 2021 due to the dry climate conditions and
greater groundwater pumping. The total groundwater pumped in WY 2022 was much less than the
sustainable yield of 23,000 AF per year,which suggests that the long-term groundwater levels and storage
will recover after above normal and wet precipitation year(s). In WY 2022,the basin groundwater storage
almost recovered from WY 2021, but has still not fully recovered from the drought conditions in WY
2020.
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 ES-1
Page 60 of 165
[This page intentionally left blank.]
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 ES-2
Page 61 of 165
1 - Introduction
The Martis Valley Groundwater Basin(MVGB or Basin) groundwater resources have been evaluated for
many years starting in earnest in the 1990s. In 2013, a Groundwater Management Plan (GMP) was
developed for the Basin(Brown and Caldwell 2013). In 2014,the Sustainable Groundwater Management
Act(SGMA) classified the MVGB as medium priority basin,which required compliance with the SGMA
regulations. In December 2016, an Alternative Submittal to a Groundwater Sustainability Plan was
submitted to the California Department of Water Resources (DWR)by the Truckee Donner Public Utility
District (TDPUD) on behalf its MVGB SGMA Local Agencies, which include TDPUD, Northstar
Community Services District (NCSD), Placer County Water Agency (PCWA), the Town of Truckee,
Nevada County,and Placer County.As referenced in the MVGB Alternative Submittal, scientific analyses
determined the Basin has at least a 25-year history of sustainable groundwater operations and conditions,
despite several periods of drought. In compliance with SGMA requirements, an Annual Report for water
years (WYs) 2016 and 2017 were developed and submitted to DWR.
Prior to DWR completing its review of the MVGB Alternative Submittal and Annual Reports, DWR was
required to review basin prioritizations as part of implementation of SGMA. The MVGB Agencies
reviewed DWR's initial prioritization of the Basin and worked extensively with DWR staff to ensure
accurate information was being used. In 2018, DWR re-evaluated the Basin and changed its priority to
very low priority, thus the Basin was no longer required to comply with SGMA. The MVGB Agencies
recognize the importance of groundwater management and have subsequently reconvened to implement
the 2013 GMP. As part of this plan, Best Management Objective #1 is to compile an annual report to
summarize groundwater conditions and to share the information with interested stakeholders. Since
WY 2018, the MVGB Agencies have prepared annual reports and have shared them with stakeholders.
This document provides a summary and interpretation of groundwater conditions for WY 2022. This
annual report provides historical data for reference along with a more detailed assessment of the conditions
since implementation of the GMP.
1 .1 Martis Valley Groundwater Basin
The MVGB, Basin No. 6-67, as defined by DWR in Bulletin 118 Interim Update (2016), is a 35,600-acre
(57-square-mile) intermontane, fault-bounded basin east of the Sierra Nevada crest. Figure 1-1 shows the
location of the MVGB and pertinent geographic features.
The MVGB Agencies use groundwater almost exclusively for water demands, although several major
surface water bodies are present within the Basin. The Truckee River traverses the Basin from the
southwest to the northeast in a shallow, incised channel. Principal tributaries to the Truckee River within
the MVGB are Donner Creek,Martis Creek, and Prosser Creek; as well as discharge from Boca Reservoir
slightly before the Truckee River leaves the Basin. Surface water storage reservoirs inside MVGB include
Martis Lake and Prosser Reservoir. Donner Lake and Boca Reservoir lie just outside the MVGB
boundaries but release surface water into the MVGB. Although surface water released from reservoirs is
not used to satisfy local demands, it is a major and highly regulated component of the Basin's hydrologic
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 1-1
Page 62 of 165
system. Surface water within the MVGB is under the purview of the Truckee River Operating Agreement
(TROA), a Bi-State, multi-party Federal Agreement enacted by the US Congress which sets limits on the
consumptive use of both groundwater and surface water in the Basin.
Wastewater is generated within the MVGB, within the Truckee River watershed, and outside the
watershed (Lake Tahoe area) and sent to a treatment facility operated by the Tahoe-Truckee Sanitation
Agency (T-TSA). The treated water is recharged into the groundwater system via two leach fields
(Figure 1-1), increasing the groundwater contribution to downstream Truckee River flows.
1 .2 Climatic Conditions
Water year types were developed for the MVGB using local precipitation data from Truckee Ranger
Station No. 049043. Its location is shown on Figure 1-1. WY 2022 was considered below normal. The
average precipitation at the Truckee Ranger Station (1988-2021) was 28.77 inches while WY 2022
received 25.36 inches, about 12 percent less than normal. The deviation of annual water year precipitation
from the mean is shown on Figure 1-2.Wet conditions were set at more than one standard deviation above
the mean annual water year precipitation total. Above normal conditions were defined as annual
precipitation between the mean value and one standard deviation above it. Likewise, below normal
conditions were defined as an annual precipitation between the mean value and one standard deviation
below it. Dry conditions were defined as an annual precipitation total more than one standard deviation
below the mean. WY 2022 was defined as below normal, but was almost double the total in WY 2021,
which was the driest on record. Since precipitation is the major source of recharge in the Basin, and
precipitation was almost normal in WY 2022, groundwater levels increased in comparison to WY 2021.
1 .3 Surface Water Conditions
The Truckee River is the dominant hydrologic feature in the MVGB. It conveys hundreds of thousands of
acre-feet (AF) of surface water through the Basin and flows along the lowest portions of the Basin. The
measured outflow of the Truckee River at the edge of the Basin was about 700,000 AF in WY 2022.
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 1-2
Page 63 of 165
U
C
N
C
_N
7
C
O
U
W
e+ o r r C7
u1
EL
o u oar 0 t_7
c [] 3 O Lt_ Z
in mu
LL
Z a(o U� zC)U5 a ❑ (3m U O
LU
- - _ - , - ,
7 z
O
w r5. Sf• — �i �` ... .. 4
e a b Q
L �1 I.
s LLJ
---- 7
LU
� I
Ea 0
I I �
a �
r j ti.7 o
F CL N N A
z+
= 4 75
r' L 010
' r
CL
co
r
I
l � _
a+
O � Q
d ; m
f0 1 - �• �
54V5 Pxw:a=n�!�,OZ7Z P.dea!en..VIvj-5'�D—O-Pp H" i
O N
O
T N
r = (6
T (o a)
L
N
_T
LL
lc� >
c
Page 64 of 165
U
C
C
(0
C
O
U
W
C7
a>
O �
N
17
O
to
H
0
a
N
c
c
Q
c
0]
a�
is
c
� N
O
N
N �
(6
(0 N
IE
Page 65 of 165
zqz � /
| &
!ez . \
/
o3z §
0
6mZ 2
B2z o
z2z
gmz
�
sIn MENEM*
#qz
2 i v@z Memos |
~ z@!
2 |
7 E �m rmz
/ 0 o@z e 0
% o
n R \ 6«z |
Iq o o
CV) $ w&Z ' ' |
!mz W
o !
fgmz ! }
&mz | {
\
k tmz
§
■ Z&z
�
\ IOU
F- &z
R o |
b wK!
2 MkT
§ zG!
4-
Er gs I
k uRI 0
. y
V66I -
a
% § y+! . § (
\ 7 } z±! � > § \
2 I&! � / k i
u I � \
& < . ok! : !
k / 6+! � \ \
7
, B&! \ y
� ' � \
2 / E % 2 g ° 1 / \ \ \ /
\ bAkQumm dQadu�V4 LUo}, ugm@DO \ k
LL / \
Page 66 G 165
U
C
U
C
(6
U
C
O
U
W
C�
A
cd
4.1
N
N
N
bQ
cd
H
u
O
Q
N
ry
(6
C
C
Q
C
(6
m
L
O N
O
Q� L
a)
_E
c�
L
Page 67 of 165
2. Groundwater Conditions
Wells used for groundwater level monitoring (labeled as CASGEM wells or piezometers) in the MVGB
are shown on Figure 2-1. Groundwater levels at these wells are monitored by the MVGB Agencies and
DWR and are reported to the California Statewide Groundwater Elevation Monitoring (CASGEM)
program. These wells are used to help assess the sustainability of the MVGB. Data from the wells were
used to generate hydrographs to show groundwater level elevation trends over time at each monitoring
location. Groundwater levels in the Basin range from within a few feet of ground surface to as much as
100 feet below ground surface and have consistently remained within this range.
Historically, groundwater level measurements were taken in the spring and fall. In 2017, the MVGB
Agencies voluntarily implemented monthly monitoring of groundwater levels for all wells in the
CASGEM program. This proactive move to monthly monitoring was, in part, to investigate and address
uncertainties in seasonal variations. Monthly groundwater measurements illustrated that peak summer-
time groundwater pumping temporarily lowers groundwater levels below the previous fall measurements,
as would be expected, but are not depleting reserves. In WY 2022, groundwater level measurements
remained above monthly summertime lows.
This evaluation continues to utilize spring and fall measurements to assess the health of the Basin,to show
whether the basin has refilled in the spring, and the effects of pumping in the fall. Because of climatic
conditions groundwater levels may vary from year to year but should fully recover during above-normal
to wet precipitation years. In WY 2022, many wells were monitored daily, to provide a greater resolution
of groundwater data.
Three of the CASGEM monitoring wells(TH-Fibreboard,TH-Prosser Village, and TH-Martis Valley)are
located near municipal supply wells that at times affect their measurements. Well 17N 17E 19K001 M was
destroyed sometime during the winter of 2021 and is therefore no longer reporting groundwater level
measurements. In addition to the CASGEM wells, six temporary piezometers were constructed near
Martis Creek for a restoration project and provided some additional information about the groundwater
conditions in the Basin. In WY 2019, groundwater level measurements were discontinued at these
piezometers.
The MVGB Agencies' monitoring network has good regional distribution (covering over 70 percent of
the Basin) and is monitoring groundwater levels near areas of pumping, inflow and outflow. The network
has over 30 years of data that can be used to assess changes in the Basin and monitor aquifers that are
being used for municipal and industrial purposes.
2.1 Groundwater Levels
Long-term hydrographs, from 1989 through 2022 for all 14 monitoring wells, are presented on Figure 2-2
along with the water year types. Figure 2-3 provides a shorter time period than Figure 2-2 to further
assess these seasonal variations in groundwater levels. Hydrographs for each individual monitoring well
are presented in Attachment A.
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 2-1
Page 68 of 165
Based on spring to spring and fall to fall measurements,groundwater elevations,depending on the location
in the Basin, are generally stable remaining within their historical ranges and some levels have increased
by more than 3 feet on average since the previous year. In WY 2022, three wells were below their
historically low groundwater levels in the fall, this is most likely due to recent groundwater pumping at
the time of measurements (17N17EO7PO01M, 18N17E33LO01M, TH-Prosser). Seasonal fluctuations due
to climate and pumping patterns are apparent.In general,spring groundwater levels increased overall from
WY 2021 to WY 2022, primarily in response to predominately wetter climatic conditions and reduced
groundwater pumping (as described in Section 3).
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 2-2
Page 69 of 165
U
C
N
C
(0
7
c
C
O
U
� W
[6 m Cv
Q_ dy ° W
2: CC
C �
C _
m y
E Q ru
U u� N m d
3 Z N N 3 M m m• m
a ++� 0 W + CY U)
❑ t (Wj z �
z U co V] LY U V a
4 3 I i - -_---------- ---- -- --- - - - - - - � � o
L ------ - — n _ O J
.a,
w
J �
�` 1 ... •.at J Z
4
{ I
� + v
w
y Z
m ::D
IE
V F; tiiUt
ClOi
a �I
r-
LLI
a
Oc Lli
�I I
� � .. i 'off ■ � NI I Jr
z
o e, o
$ G W >
a p p
s 09 Q m i c3
µxx y C c c I IL N c�
a Ii F d
O
r y x x +
Y N N V 47 Q7
ry ° a I to ELa
67
x bo rA
Y' m
a a•r. w m
oo i a`2 m I x
4 " m o >
x I
p
z 0 rl 7;;F4' Rive
H
fn
- a Q5 o k a
� I �
m I p
N I 0
V , O
72
LL
�W.
p .• —
m
[L'
O ,
v co
00
c0
c
3W5 Pxursuo!ieao"111sM 6upoliuory-E e�M15ri1ZZOZ iroda211ertuW col sart5!�•A�aP�H 5uiWoM4cellaAs9�eW BLE069L19772fu,d4Z ZZUUdVEU
O N
O
N
r N L
N (0 N
m > CU
L
3 � �
Page 70 of 165
U
C
N
C
(0
7
C
O
U
17
C�
a>
O �
N
to
.fi
O
Q
N
7
C
C
Q
C
0]
N
C
� N
O
N
N �
(6
(0 N
IE
Page 71 of 165
U
d Y LZ > Cli
..
8 0 8 8 0 8 0 0 0 M > 10 0 8 E �,
LL. m x " Y a c� Y o > Sc ❑ c
n a) ry ti Oi rn rn m 0 n m Ln Q d o;
r4 ry � p .1 rn r-i � � -r p z m O
n k n n n n � a O f* LD n ? } U
iT d ti ti
z z z z z z z z z z z a
rn n 00 n n rn rn 00 n 2 2 2 n n Q m Q W
,°�� U'
I I I I � � I I I I I I I ■ ■ ■ ■ ■ �
a
ZZUZIOT
T ■ TZOZ/OT
t
= aE OZOZ/OT c
N o o
N ■ 6TOZ/OT
8TOZ/OT u
00 ■ m
m LTOZ/OT o
i 9TOZ/OT m
S TOZ/OT ❑
+; tTOZ10T
- £TWOT
ZTOZIOT
° 110z1oT
OTDVOT
w
- ■ � 600ZIO1 rn
> — 800Z/OT N
d
J
— — ■ IOOZIOT
goo Z/OT
3 ° ■ Sa0Z/DT
p - ■ b00Z/OT
(D £OOZ/OT
v • 44 ZOOZ/OT
•L
° TOOZ/0T
D00ZIOT
c
N 666T/UT
m ■ .4 8661/OT
L66T/0T
- 966T/OT
p - : S66T/OT Q
b66T/OT
d £661/OT m
■ Z66T/OT
N T66T/OT
ca
� ■ � 066T/OT a N
N —M 686T/OT CD
N F 8 8 4 8 S o � Q)
a) ; G > �
L Ln LM Ln Ln Ln U) U) Lr1 Lr1 cn
(ISwe-14)UQIIenalj Iana7 jalempOnoig " Q)
U-
Page 72 of 165
U
C
$ o g o v o o m o m mtlp
w ❑ �'
w co
LL O > p
N M V7 M
NLLJ mw u w w w w w LLJ z
r, r. o � m
oIn
z z z z z z z z z z �, v o r 3
r. r. 00 rn rn rn n n 2 2 2 n rn a 0
.-- .--i .� .--i .--i � N r- r-� F F F •-� •-� � Q m Obi v7 o�p CJ
I I I I I � � I I I I ■ ■ ■ ■ � U
€Z-uef 3
ZZ-00 N
ZZ-Inf
N ■ ZZ-ady o
N r
o — ZZ-uef v
N f Y
— TZ-3nD IT
0 0
N TZ-Inf a
■ TZ-adV a
� } Y
L 3 v TZ-uef
d
— OZ-33,D
OZ-I of
C o ■ OZ-ady af°,
} o oZ-uef r`a
3
w 5T-33,0
6T-Inf ro
m
J a 6T-ady N
6T-uef 0
- 8T-130
AL
C cc — — ST-Inf
a ST-adV
v
8T-uef
o — LT-430
r
y LT-I n f
2
C LT-ady
m 9T-naq
y - 91-100
to
3 9T-Inf 76
76
c 9T-add c
3 c
9T-uef Q
G
ST m
d i m
Si-Inf
N ST-add
❑` N
■ tiT-3�E] o
p p N
M g 8 $ Ln an a)N m C ao oQ n
d f Ln tin vi r- to vi uS vi Ln an > }
3 (ISWe-)3f UOIJena13 Ianal ialeMpunoig A ?
LM
m �
LL
Page 73 of 165
2.2 Groundwater Flow
Seasonal groundwater level elevation contours for spring and fall 2022 are shown on Figures 2-4 and
2-5. These contours reflect pumping, recharge, geologic conditions, and discharges to surface water.
Monitoring well groundwater levels and bed elevations of gaining surface water reaches were used to
develop the groundwater elevation contour maps. Groundwater levels at 17N16E13K003M were used for
contouring as 17N 16E 13K001 M appears to reflect groundwater levels in a shallower portion of the aquifer
at the same location.
As expected, spring groundwater contours show higher elevations than fall contours. The fall contours
exhibit lower groundwater level elevations in the central portions of the Basin, relative to spring
conditions, due to increased pumping and less natural recharge.
The groundwater flow patterns remained generally the same compared to previous water years, with flow
from the perimeter of the MVGB towards the Truckee River. The groundwater contours show pumping
has changed this regional pattern near the airport, but this is not a new development as the historical
contours have also reflected this pumping depression. The pumping depression appears to be caused by
the Martis Valley municipal well. The extent and depth of the depression has decreased slightly due to the
wetter conditions in WY 2022.
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 2-7
Page 74 of 165
[This page intentionally left blank.]
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 2-8
Page 75 of 165
U
C
C
(0
C
O
U
� C7
o @
uJ
U y
C '8
CL
? ��.. N ram.. a3 ��+ 3 Z v J
Q �m 2 3: ` E 3 � ink m LL
W �m o � o (v oni oo mow [fl
Z F �� U C7wUN C7� �C9m 5 ly- z
t W
IO �Y
1 ` r0V UJ
i \ LL J z
" I CD Lu
Lu CO
I
ti i f -J
❑
� Z)
cr— o
w I <
U
uJ,a
t 6 r
r
a JWz AID
M J 0. 0
�- nti - Qom o9w c o
zn
LLJ
CO
'Lou
nJ G
l '3�r � N
t i4 -- g._
In
ti a `ho
rL
In In
4
N
21 lb
Ccp
C
Jr] r y�00
co 7N0 C �m rn O tl] O
LL m 0
In CDLU
y
I NI d J
O W��4?
y
ti rc j4 t z
W r
, I �
1
z
O I
N G v4
NO 11 i , ��: cv
N
rL
O f
I
a
o � Q
m
L -IWO
�
SWS Pxw-ZZOZ535M-El—LUZDDE uoda��enu�rp wl sanEiji�a�apdH-9u vML�aklee�9greW 61FA191}epelu�lZ EZOZeunffiL
O N
O
N
� N L
N cu N
m > }
L
3 � �
LL 3:
Page 76 of 165
U
C
C
C6
7
C
O
U
(] W
N
a d m Ld
•� U w Q7 __ � � �
LL _ LL
Q � ° 3 = LE 3L � 3 Ca
w pd o � o � moQ 20 m2cz o CO
z H zME 2 t7WUni C7LL C7m U C� z
I I W ❑
i
L-J z
O �
z � �,
❑ n,
w
� �
d
W W
� J
4
W
z
q a 4i I v
w
a I Z
r � -
k I > h+°+
_ � .•�' _ -
W 0,
u M
�.... .�" W 2
F - QQQ� 7fn d1 +a
u+ w
AF
Y a
M $ e L1J
an
� ��� 4�
yF rZ w t ur inr.1r CIE �.
C..
Ln
W G 1Z+
i111 G r N .zl r
{gip T IG:Z {M+ -l9 CW I + [4
4'J~ p vy a7 FLram"^ ! [1
❑
- 1 � � i. �mlr O>• tl7 1 L)
C LD LLCD
� ��� 'p+o ro _ - Q ID R N
TCD
x�eG- ` r 0xP L Y7 [ —� [p n1
co co
rA 2
w O
` N � I IL4�yp1
Y �� 1 r'
x ar N
_ � G
-- M
u� �c
ti
r 1 y
O
O I
>
U
:4 i t3
R V '
� � e
N
N
N � I
U— :sii Z
r all '. m
' � Q
1 d ^ I o
co
IC 51N5 F'�w LZ6Z�33M-L ernoijfZ��Z y+odaa len�uq rc�sein6ijioa'Jo�W N�ui oM4hasels!yalN 6LEDi9l'.suaiad51 EZQUdvgl
O N
O
N
L
N ca aa)
d > }
L
N
_T
c� >
U- c
Page 77 of 165
3. Groundwater Extraction
Groundwater extractions for various water use sectors are presented in Table 3-1 for WY 2022. The
methods used to measure extraction data are noted along with water use sector totals. The total water use
is based on metered and estimated pumping. The general locations of the community water service areas
and non-community water purveyors, along with the location of golf courses, are shown on Figure 3-1.
Total groundwater extraction in the MVGB was about 6,900 AF for WY 2022,well below the sustainable
yield estimate of 23,000 AF.
Metered municipal groundwater extractions made by TDPUD and NCSD account for about 70 percent of
the total extractions; therefore, total groundwater extraction is well quantified. Groundwater extraction
estimates for non-community uses and golf course irrigation were developed by others and are reported
annually to the DWR, State Water Resources Control Board, and TROA program. These estimates are
developed on a calendar-year basis,not by water years.The calendar-year extraction data is approximately
equal to water year estimates due to the annual cycle of climatic conditions, including freezing
temperatures and significant amounts of snow and other precipitation, which typically limits the need to
pump groundwater in the winter,spring,and fall months of each year. These estimated values are provided
in Table 3-1.A full reporting of WY 2022 estimates is not currently available, so estimates were obtained
from the most recent data contained in the Annual Inventory of Water Use,Lake Tahoe and Truckee River
Basins, Calendar Year 2021 report(DWR 2022).
The locations of wells for the public and community water systems, and general locations of golf courses
and non-community entities that also use groundwater in the MVGB, are shown on Figure 3-1. The
distribution of groundwater extractions for the wells are illustrated by the size of the symbol (magnitude)
and color (pumping entity). The largest volume of water extracted at any location in the MVGB is from
the Martis Valley municipal well, located near the airport, and has altered the regional groundwater flow
direction. Three other wells north of the Truckee River and east of the town of Truckee are the next largest
producers in the valley. Groundwater pumping decreased on average by about 700 AF during WY 2022
from WY 2021, decreasing the severity of the groundwater depression. Figure 3-1 is also useful for
comparison with the groundwater contours (presented in Section 2) and corresponds with the pumping
data.
Graphical representations of monthly and annual pumping for TDPUD and NCSD wells are presented on
Figure 3-2. Seasonally, groundwater demand peaks in the summer and declines to approximately one-
third to one-quarter of that amount during the winter and spring. This distribution suggests that calendar
(for non-community users and golf course irrigation) and water year pumping estimates are typically
similar in magnitude for this Basin, hence the tabulated totals in Table 3-1 with calendar year pumping
estimates are defensible surrogates to approximate water year pumping estimates. Figure 7-1 also shows
that the overall pumping volume fluctuates from year to year but overall remains consistent unless dry
conditions persist, varying by about 1,000 AF over the last 4 years. Groundwater use was higher in
WY 2021 than in WY 2022, due to almost double the precipitation in WY 2022.
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 3-1
Page 78 of 165
Table 3-1. Groundwater Pumping for Water Year 2022 (values in acre-feet)
2021 2022 Annual
Metered
Agency Estimated Oct Nov Dec Jan Feb Mar Air May Jun Jul Aug SeR Total Percent
ublic Utility Water Purveyors 1
Truckee-Donner PUD
Potable Water Year
1.Airport Well Metered 49 22 49 51 37 54 0 0 64 54 52 44 476
2.Martis Valley Well Metered 132 126 106 97 104 45 68 98 105 130 124 113 1,248
3.South Side Well Metered 0 0 0 0 0 0 0 0 0 0 0 0 0
4.Glenshire Dr Well Metered 0 0 0 0 0 10 18 33 53 112 95 56 377
5.Hirschdale Well Metered 1 0 1 1 1 1 1 1 0 0 0 0 7
6.Prosser Annex Well Metered 12 0 0 0 0 0 0 11 21 25 23 20 112
7.Prosser Heights Well Metered 9 0 0 0 0 0 0 4 17 18 18 17 83
8.Sanders Well Metered 0 0 0 0 0 0 0 13 39 34 31 23 140
9.Prosser Village Well Metered 41 27 41 41 41 61 57 65 88 104 93 76 735
10.Northside Well Metered 0 0 0 0 0 0 0 0 3 3 3 13 22
11.Old Greenwood Well Metered 37 43 46 66 45 64 68 77 84 102 95 82 809
12.Well 20 Metered 6 0 0 0 0 0 0 7 14 17 16 12 72
13."A"Well Metered 0 0 0 0 0 0 0 0 0 0 0 0 0
Non Potable
14.Fibreboard Well Metered 23 0 0 0 0 0 13 72 91 112 92 58 461
15.Donner Creek Well Metered 10 0 0 0 0 0 2 21 46 55 47 24 205
16.Southside Well ill Metered 0 0 0 0 0 0 0 0 0 1 1 1 3
17.Tahoe Donner GC Wells Metered - - - 0 0 0 0 7 11 3 4 2 27
Subtotal 320 218 243 256 228 235 227 409 636 770 694 541 4,777 69%
Community Water Purveyor
Northstar C.S.D. Water Year
TH-1 Metered 6 0 2 0 0 2 1 15 5 2 20 17 71
TH-2 Metered 5 0 0 7 0 0 0 9 41 51 25 20 157
Well Metered 18 8 11 1 3 2 0 0 34 41 42 33 192
Well Metered 17 3 4 11 9 9 10 32 33 39 37 32 235
Well Metered 0 0 0 0 0 0 0 0 0 0 0 0 0
Subtotal 46 11 16 18 12 13 11 56 113 133 124 102 655 10%
Calendar Year
Hobart Work Center Estimated 0
Aggregates Martis Valley Estimated 120
Subtotal 120 2%
Calendar Year
Gray's Crossing° Estimated (Served by TDPUD and included in their reported pumping) 200
Old Greenwood Estimated (Served by TDPUD and included in their reported pumping) 335
Ponderosa(9-hole Course) Estimated (Private wells not operated by TDPUD,monthly pumping not available) 21
Coyote Moon Estimated (Served by TDPUD and included in their reported pumping) 232
Schaffer's Mill Estimated 202
Lahontan Estimated 328
Northstar Estimated 202
Martis Camp Estimated 340
Tahoe Donner Estimated (component of demand provided by TDPUD from wells in basin) 242
Subtotal 1,335 19%
Total 6,887
'Values reported in gallons and converted to acre-feet
2Values reported in million gallons and converted to acre-feet
3Estimated and obtained from Annual Inventory of Water Use Lake Tahoe&Truckee River Basins Calendar Year(DWR 2022)
"Groundwater use already accounted for in TDPUD reported pumping and not included in golf course demand subtotal
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 3-2
Page 79 of 165
U
C
N
C
(0
7
C
O
U
CL
w v a m a R
F- � m a W
c w 3 a� m CC
?�' ° ro n t o `° a ? °' sa o
m � — E — s� xLL xxLL xLL m 6 3 m ❑_
❑ - d O itl W d Ll7 W N a Z
O d — r t c c c X °o Q N O w d 3 W
4� a m o ul d ma t`c � o `c F,a m m M o o C]
e a n r ]m v c`a ) an d
ti a cn M I W X
-J W
4ff
W
---- --� — -- ---- - 0 Q
- - - --- - - — ---- ---------: - ------------- -------- i----- ------ ------ m 3
} � i ° o
in �4 � ❑
LU
LU Iy
LL
J (J
Z
O
F � 4
� 4
w
S L J z
� I
i
k m dl w o
Uj1,4 U - u
aJ
y1a rr c�
144 i LLJ
;1:, �lfurq".
b ivzrC L
..' J G7a L6 r L+
o -
s
fu _
w ti o z
r�ny� i7 O m C 1 a N
a 1
Quo a m2 CL U
op yi
:,. F �` N m ❑ •� Jam: r O
47 i�
UI {p Q C S7 A
to — ` D
1 Gty m$ 5' m
b
J� A , LL
0,00
d
I 9aa
o x wr a r � O
�� � �v m
N
o g
F 2 � �.�i[ketnRdv�er
O
x I— ❑
W � r
0 s I
N x ,•s N
O �� ty
.N I
Tim
£ ♦ ` i -"tea. (�
L { F
SAS Rxw9imry�erfx3�epempunmij psuoryeao7-g em5jlZZPZ uodBa lenuuy�o14ain6��ioa�eiplµ{Tu!kMi�RMs!3�aW fiL£O L9 LLT1�fO1dCZ EZOZunf�L
O N
O
N
� N L
M (0 N
> }
L
LL
3 � �
c� >
c
Page 80 of 165
U
C
N
C
(0
7
C
O
U
W
C�
x
O
O �
co
N
O
bIJ
H
u
O
Q
N
7
C
C
Q
C
0]
N
C
Z5
N
O
N
N �
(0 w
IE
23:
Page 81 of 165
U
C
C
rp W r0 Q Z LPL
❑ � � � Lll � LZ � tll �
~ d Q } y
8 8 8 8 8 8 C)
m ry .� o w
c�
AL rr
N LL ■ N rc'y
N Q • ry LL_ •
�Oj n • O Q ■
7 n ■ N L nAL
N Q ■ CV LL
8 LLn . n 0
o �► OF"
f- ■
c Q• o U-
0 rY1• ` p a • n'
•E O■ f N Fn • J�
7 Ln• i� t' W ■
>+ AL
c •
O ri Q ti LL ■ r
O a Q
• ■ .p6 w ch
N . GNr
f% �r o
00
N N ■ N Ol • ?,
c 1*
G(b, °
E
° ¢• a ¢• r�Y� m
V (N a)• N Lnr- in V
• w
c Ln
a
ca r
LC1 y O o
CBn [] Q• o Q■ 40 70-
W• N• 9� i. c
O 3 W• Ln■ �a� o Q
CO c m
s
m 1. � m
� � ag Sly, 3
sr,a6 N
I I I i- m T o
CN
M 8 8 8 8 8 8 8 8 8 ��b
co a)
0) 00 n lD Lr1 cr M N -4
(yluoW jad)laaj ajay ,
T
U-
Page 82 of 165
U
C
C
N
U
C
O
U
W
C�
cd
N
O
y c'>
N
N
bQ
cd
.s
H
u
O
O_
N
O
7
C
C
Q
C
0]
N
C
O N
O
T N
N CU
(6
(0 N
ccu
>�
Page 83 of 165
4. Surface Water Diversions
Although the Truckee River and multiple tributaries course throughout the MVGB, surface water
constitutes less than 1 percent of Basin water supply. The total surface water diverted for use is about
590 AF in WY 2022, but not all was diverted within the MVGB.. Estimated surface water diversions are
listed in Table 4-1 for WY 2022.
NCSD has water rights to use water from Big Springs, which is located outside the Basin but within the
watershed as shown on Figure 3-1. Northstar Resort uses water from the spring, primarily for
snowmaking. A portion of this water supplies recharge to the Basin aquifer by storing water as snow,
which later melts,becomes runoff, and infiltrates into the Basin. Water from the spring is also used in the
Basin, at the Northstar Golf Course, along with other commercial and domestic uses. The amount of
groundwater recharge attributable to surface water from Big Springs cannot be quantified at this time.
A second surface water source, from within the MVGB, is used for irrigation at the Ponderosa Golf
Course, but its diversion point is unidentified. Some deep percolation from turf irrigation also provides
groundwater recharge within the MVGB.
Table 4-1. Surface Water Usage Reported for Water Year 2022 (values in acre-feet)
2021 1 2022 1 Annual
Metered
Agency Estimated Oct Nov Dec Jan Feb Mar Air May Jun Jul Amu Sep Total
Public Utility Water Purve ors _1116�
Truckee-Donner PUD' Metered 0 0 0 0 0 0 0 0 0 0 0 0 0
Subtotal 0
ommunity Water Purvey stimated using most recent data for calendar year 2021,DWR 2022)
Northstar C.S.D.z (M&I) Metered 7.3 5.7 1 0 0 0 0 0 0 0 0 0.4 14
Non-PUD Community Purveyors Estimated (From Non-PUD Community Purveyors) 409
l' Subtotal 423
rpn-Community Water Purvetp� (Estimated using most recent dataf�dar year 2021,DWR 2022)
Hobart Work Center Estimated 0
Aggregates Martis Valley Estimated 105
Subtotal 105
��ourses (Estimated using most recent data for calendar year 2021,DWR 2022)
Ponderosa Golf Course Estimated 62
Northstar Golf Course(from Big Springs)Z Estimated 0
Subtotal 62
Total 590
n/a=Not Applicable
'TDPUD has an allocation of Truckee River flows but does not use it,has no infrastructure to access it,and has no plans to use it.
2 NCSD holds ripariain water rights for use of Big Springs,which is outside of the MVGB.A portion of this water is used for limited municipal use within the MVGB and Northstar Golf Course.
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 4-1
Page 84 of 165
[This page intentionally left blank.]
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 4-2
Page 85 of 165
5. Groundwater Recharge
Wastewater is exported from the North Lake Tahoe area and is sent to the T-TSA wastewater treatment
plant,located in the MVGB.Total estimated monthly wastewater imports to the MVGB from areas outside
the Basin, as well as metered wastewater (weir) derived from within the MVGB, from the Truckee
Sanitary District(TSD), were provided by T-TSA and are listed in Table 5-1 for WY 2022. About 1,700
AF of wastewater was imported into the MVGB in WY 2022.
The treated water from the T-TSA is recharged into the MVGB groundwater system through subsurface
leach fields (pipes with holes surrounded by gravel) under permit with the Lahontan Regional Water
Quality Control Board. The locations of the leach fields are shown on Figure 1-1. About 3,700 AF of
treated water was recharged into the MVGB in WY 2022. Wastewater from TSD is partially derived from
groundwater pumping within the MVGB and partially offset impacts of local pumping near the Truckee
River.
Table 5-1. Estimated Groundwater Recharge from T-TSA for Water Year 2022 (values in acre-feet)
2021 2022 Annual
Tahoe-Truckee Sanitary Agency Actual
(T-TSA)Sources of Inflows 1 Estimated Oct Nov Dec Jan Feb Mar Apr May Jun Jul Lug SeR WY Total
Lake Tahoe Area(Imported water) Estimated 150 140 140 140 150 160 150 140 140 180 120 90 1,700
Truckee Sanitary District(TSD) Metered 120 120 150 190 170 190 170 170 200 220 170 130 2,000
Total 3,700
'Deliveries to treatment facility from outside the MVGB provided by T-TSA and are converted from million gallons to acre-feet
2 Metered readings from Granite Flats used to calculate imported wastewater from Lake Tahoe area
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 5-1
Page 86 of 165
[This page intentionally left blank.]
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 5-2
Page 87 of 165
6. Total Water Use
The total estimated groundwater and surface water use in the MVGB by sector is summarized in
Table 6-1. Over 85 percent of the water use was provided from groundwater, with a total water use of
6,887 AF in 2022.About one-half of the groundwater pumped was returned to the Basin after being treated
by T-TSA.
Table 6-1. Total Water Use for Water Year 2022 (values in acre-feet)
Water Use Sector 2022
Municipal and Industrial (M&I) 6,081
Groundwater Metered 5,432
Groundwater Estimated 120
Surface Water Metered 14
Surface Water Estimated 514
Golf Courses 1,397
Groundwater Estimated 1,335
Surface Water Estimated 62
Subtotal Groundwater 6,887
Subtotal Surface Water 590
Total Water Use 7,478
T-TSA Groundwater Recharge 3,700
Total 3,778
Note: Only includes water sources in MVGB,see Table 4-1 and does not include
evapotranspiration from native vegetation.
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 6-1
Page 88 of 165
[This page intentionally left blank.]
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 6-2
Page 89 of 165
7. Change in Groundwater Storage
An empirical approach was used to calculate change in storage using spring groundwater elevation
contours for 2016 through 2022. The spring contour surfaces from WY 2021 and WY 2022 were then
subtracted to produce water level change distributions. The use of spring-to-spring water level differences
was deemed to be the most appropriate when assessing ambient groundwater conditions, because it has
less influence of temporal, localized changes due to pumping adjacent to monitoring wells.
Figure 7-1 spatially shows the estimated groundwater elevation changes (current year elevations
subtracted from previous year elevations). Portions of the Basin (northwest, southwest, and southeast
corners) with no significant pumping nor groundwater level monitoring wells were not contoured.
According to DWR files(DWR 2023)there are no irrigation,municipal or domestic wells in the northwest
and southwest corners of the Basin. In the southwest corner there are four domestic wells, but their logs
show that they encountered lava flows and ash layers, and no sediments so it is unknown whether these
wells would provide representative groundwater levels with the rest of the Basin.
Change in storage estimates are dependent upon the assumed specific yield(the percent of sediments with
pore space that contains water that can be drained by gravity) or storage coefficient (similar to specific
yield but used when aquifers are more confined as is typical with depth) of the aquifer formation. Given
the complex and often interbedded nature of the MVGB aquifer system, an average of depth storage
coefficients(ranging from 0.1 —0.05)were used for the analysis.The results and input values are presented
in Table 7-1. Groundwater in storage in the MVGB increased in WY 2022 and almost replenished the
loss of storage in WY 2021. Most of the change in storage is likely due to the increased groundwater
recharge due to the wetter conditions in WY 2022, since groundwater pumping only decreased by 700
AF, with the greatest increase being located north of the Truckee River. The change in storage estimates
could also be affected by the loss of monitoring at the destroyed well (I 7N I 7E I 9KOO I M).
Table 7-1. Estimated Change in Storage
Table 5 Estimated Change in Storage
Basin Area Used Average Estimated Change
Time Periods for 1 Groundwater Average Storage
Groundwater Level in Analysis Level Change Coefficients in Storage
Elevation Comparisons (acres) (feet) (AF)
Spring 2020-Spring 2021 24,500 -3.72 0.075 -6,841
Spring 2021-Spring 2022 24,500 3.25 0.075 5,972
Total Cumulative Change 2021 and 2022 WYs -869
1 Basin Area limited to extent of MVGB with groundwater elevation data to limit interpolation error
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 7-1
Page 90 of 165
[This page intentionally left blank.]
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 7-2
Page 91 of 165
U
C
N
C
_N
7
C
O
U
I i W C7
Z Z
o U}
ua
cad N
z ly- GJO
UJ J CV
d
QW (�
vN N w
- � O O
fk r9 LO w
G
Q1 = 2 a7 1 z
L4
° daa 000
>- 0 C
Ld Qr N
..'N, �1
❑ n S. /w/� a_I V N C co V 3 C
Z � m ao U <
f-"I < 2 m
iLLJ
I -J
ro
1 z
I
R � � . t-71u O' -
.r.,r 41 W m o
7 iG O CI V
r mp: Ki W 14J N
r �I a W
waz
v
z a Do-
F A ti. 10- x x
W .. W `.
C+ r r z � I
�z
O
t'Ali,
. I ,.�:
' � m �� j r. 2 0 �
W. 4
�CL
@
1
CDZ Q
W 9r,
2'. W a
z^^ '� iC0 j •3 m � � �
N Z co
r jl
O r LCL R e
N
tm
Q r I
r x r
N
t
W __ �•�
_s
G }y G! I
c
.yl.,
v U j
.S
� I
1
S - 4
I
R I �
m I N
•1 �. O -� Q
I JaD C
G � 1
I N co
�+ C
xw ai nE� oda enuu �o;sarn� oa r 6ul rfa sl e - afa
£ZCIL un
C SWS P SZ-Ld55�-01 �4ZZOZlJ al tl �4 '.39P+L{I 'Va7JA Ile/i 3� W 61EOL9LLsW" d�:1 fdL O N
G O
T N
T (U >-
cu LU
L
N
T co M
LL 2 �:
Page 92 of 165
Historical trends in the estimated annual and cumulative change of groundwater in storage, along with
water year type and annual groundwater use, are shown on Figure 7-2. The annual change in storage was
based on groundwater elevation change and specific yield as described above. Storage change and
groundwater use estimates prior to WY 2016 used a different method and therefore are not shown. Over
the last water year, groundwater in storage increased by about 6,000 AF as a result of wetter conditions in
WY 2022,with increased recharge and less groundwater pumping. Groundwater in storage in the MVGB
increased in WY 2022 and almost replenished the loss of storage in WY 2021 but not the losses that
occurred during WY2020. For perspective, the Basin has approximately 484,000 AF in storage, so the
overall change in WY 2022 is relatively small (about 1 percent increase) in comparison to the total water
stored in the Basin.
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 7-4
Page 93 of 165
[This page intentionally left blank.]
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 7-5
Page 94 of 165
Total Annual Groundwater Extractions(acre-fe @� /
\ \
_ / 00 0
§
0
E
O
e
. ±z
e
q \ § Imz
E &
\ \ k
q ƒ °
7 / Qj
/ 07
V) 2 2
.& 4-- C
� (D CL � 9
m $ E »
u 5 [
® S
Bmz
2
�
/
»
\ Qp
o
tQ } mz
= o ° =
C VI ea
W b5
& m —
�
o - - 5 }
G 22 2k % \
) k 27 / °
k kK [ ` /
/ \ kCO /LU / \ ®
j
\ soon �
}
E
� 9
I 9m3 / /
c o »a
C3 R E g �
c_ o o c R o e
\ $ $ \ / /
(@q-a 2)mei ojS 2 @mpuno g pa»&iIs] \LL \
Page 95 of 165
U
C
N
C
7
C
O
U
W
C�
A
cd
N
O
N
�i
N
bQ
cd
.s
H
u
O
Q
N
7
C
C
Q
C
0]
N
C
O N
O
T N
N CU
(6
(0 N
cu
Page 96 of 165
8. Groundwater Management Activities
The MVGB Agencies continue to invest in the stewardship of the Basin and practicing of adaptive
management to proactively ensure that the Basin operates within its sustainable yield. This includes
frequent monitoring of key data points and interactions with local stakeholders' meetings.
The most significant management action has been the voluntary implementation of monthly and/or daily
monitoring of groundwater levels for all wells in the CASGEM program. This proactive move to monthly
monitoring over 5 years ago and well before the mandate was, in part, to investigate and address
uncertainties in seasonal variations. Without this proactive change the lower groundwater levels during
the summer months noted in previous water years would not have been detected. The results and trends
from this improved monitoring program are presented in this report, and both TDPUD and NCSD, who
are responsible for the monitoring,intend to continue this monthly monitoring going forward as an MVGB
adaptive management strategy.
The MVGB Agencies continue to interact with local environmental interests and MVGB stakeholders to
provide information and hear concerns. Primarily, this has been done by the participation in the Truckee
River Basin Working Group(TRBWG).The TRBWG was formed with the passage of the TROA 20 years
ago and has been strengthened with the support of the newly formed DWR-TROA division. The TRBWG
is comprised of the California stakeholders in the river watershed including water purveyors, local
governments, environmental interests, recreational interests, DWR, California Department of Fish and
Wildlife, United States Forest Service, and others.
The MVGB Agencies shared the findings from the previous Annual Report with stakeholders and are
planning to share this report and discuss the findings in the near future.
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 8-1
Page 97 of 165
[This page intentionally left blank.]
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 8-2
Page 98 of 165
9. Conclusions
Groundwater levels increased in the MVGB through WY 2022 in response to the wetter conditions and
decreased pumping. Groundwater levels in most monitoring wells have remained above their respective
historical low levels when compared to historical spring and fall levels. Only three wells were below most
likely due to recent groundwater pumping at the time of measurements (17N 17E07P00l M,
18N17E33L001M, TH-Prosser). Summer groundwater levels dropped below their historical low fall
groundwater level at TH-Fibreboard, however, the monthly and daily monitoring showed groundwater
levels quickly recovered, indicating the lower groundwater levels were a localized effect due to pumping.
Groundwater pumping decreased by about 14 percent, averaging 700 AF, compared to the previous water
year. In response to the decreased groundwater use in this area the pumping depression that formed during
the dry conditions of the previous 2 water years (WY 2020 and WY 2021) has reduced in size.
With an overall increase in groundwater storage due to increased precipitation and lower groundwater use
in WY 2022 compared to previous water years, the MVGB is rebounding from the critically dry years of
WYs 2020 and 2021, which is similar to other northern California groundwater basins. During this water
year, groundwater in storage increased by about 6,000 AF, or about 1 percent of the total storage in the
Basin. The increase in storage, when compared to WY 2021, shows pumping only decreased by 700 AF,
therefore the increase in precipitation and recharge in WY 2022 was the predominant factor of the
recovered storage. The Basin partially recovered in WY 2022 but not enough to balance the losses in
storage over the last two drought years.
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 9-1
Page 99 of 165
[This page intentionally left blank.]
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 9-2
Page 100 of 165
10. References
Brown and Caldwell. 2013. Martis Valley Groundwater Management Plan (GMP).
California Department of Water Resources (DWR). 2016. California's Groundwater. Bulletin 118-
Interim Update 2016.
2022. Annual Inventory of Water Use, Lake Tahoe and Truckee River Basins, Calendar Year
2021.
2023. California Groundwater Live. Accessed May 2023.
htt2s:Hsgma.water.ca.gov/CaIGWLive/#wells
GEI Consultants, Inc. (GE). 2018. Annual Report for the Martis Valley Groundwater Basin, Sustainable
Groundwater Management Act Alternative Submittal, Water Years 2016 and 2017. March 2018.
2021. Annual Report for the Martis Valley Groundwater Basin, Water Years 2018 and 2019.
January 2021.
2022. Annual Report for the Martis Valley Groundwater Basin, Water Years 2020 and 2021.
June 2022.
Truckee Donner Public Utility District(TDPUD). 2016. Martis Valley Groundwater Basin Sustainable
Groundwater Management Act Alternative Submittal. December 2016.
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 10-1
Page 101 of 165
[This page intentionally left blank.]
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022 10-2
Page 102 of 165
Attachment A. Monitoring Well Hydrographs
Martis Valley Groundwater Basin Annual Report GEI Consultants, Inc.
Water Year 2022
Page 103 of 165
17N16E17F002M
5,950
5,900
N
E 5,850
C6
I
C— 5,800
0
a--+
C6
QJ 5,750
W
i
N
5,700
Q 5,650 --------
L
GS Elevation
5,600 —WSE
Historic Low WSE
5,550
Ol O r-I N M Ln lD I, 00 Ol O r1 N M Ln lD I, 00 Ol O r-I N M 't Ln %D n 00 m O r-I N
00 Ol Ol Ol Ol O) O) Ol Ol Ol Ol O O O O O O O O O O -4 ci -4 -4 ci ci ci -4 -i c-1 N N N
Ol O) O) Ol Ol Ol Ol M m m Ol O O O O O O O O O O O O O O O O O O O O O O O
r-I r-I r-I 1-1 -4 -1 -1 -4 -4 -4 -1 N N N N N N N N N N N N N N N N N N N N N N N
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci r-I ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci
Water Year
Page 104 of 165
17N17E29B001M
5,950
5,900 —
N
E 5,850 -
C6
i
5,800 -
O
aj
Cu
5,750
W
i
N
Cu 5,700 ------
Q 5,650
L
GS Elevation
5,600 WSE
Historic Low WSE
5,550
M O 1 N rn Ln l0 r- 00 m O -1 N rn t Ln l0 I, 00 0) O 1 N M 'T Ln l0 I" 00 0) O -1 N
00 Ol Ol Ol Ol 01 01 Ol 41 Ol Ol O O O O O O O O O O �--I a--I a--I r-I a--I a--I r-I a--I a--I r-I N N N
Ol Ol m Ol 01 01 a> 01 a> -1 O O O O O O O O O O O O O O O O O O O O O O O
a--I N N N N N N N N N N N N N N N N N N N N N N N
\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
Water Year
Page 105 of 165
18N16E22H001M
5,950
5,900
N
E 5,850
C6
I
5,800
0
aj
C6
(3) 5,750
W
i
N
j 5,700 ------
Q 5,650
L
GS Elevation
5,600 —
WSE
Historic Low WSE
5,550
M O r-I N rn m l0 n m m O r-I N M -0 m %D n m m O r-I N M 'T m %D n W m O r-I N
00 Ol Ol Ol Ol 01 01 Ol 41 Ol Ol O O O O O O O O O O �--I a--I a--I r-I a--I a--I r-I a--I a--I r-I N N N
01 01 01 01 01 1-I 1 01 -1 01 -1 -1 O O O O O O O O O O O O O O O O O O O O O O O
.- r-Ia--I r-I a--I a--I N N N N N N N N N N N N N N N N N N N N N N N
\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
a--I r-I r-I
Water Year
Page 106 of 165
17N16E11F001M
5,950
5,900
N
E 5,850 - —
C6
I
5,800
0
a--+
C6
5,750
LU
i
N
C6 5,700
0 5,650
L
GS Elevation
5,600 WSE
Historic Low WSE
5,550
M O r-I N rn m l0 n 00 M O r-I N M -0 m l0 n 00 m O r-I N M 'T m l0 r, 00 m O r-I N
00 Ol 0) 0) 0) 0) 01 Ol 01 Ol Ol O
m (n Ol m m M M M 0) M M O O O O O O O O O O O O O O O O O O O O O O O
-1 r-I -1 -1 N N N N N N N N N N N N N N N N N N N N N N N
\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
r-I r-I r-I
Water Year
Page 107 of 165
17N17E19K001M
5,950
5,900
N
E 5,850
C6
I
5,800
aj
C6
5,750
W
i
N
j 5,700 ----
Q 5,650
L
GS Elevation
5,600 WSE
Historic Low WSE
Note: Well was destroyed, no measurements after Dec 2021 -
5,550
M O r-I N rn * M l0 n M M O r-I N M -0 M %D n M M O r-I N M 'T M %D n M M O r-I N
00 Ol Ol M Ol M M M a1 M M O O O O O O O O O O 0 0 0 0 0 0 0 0 0 0 N N N
01 01 01 01 01 11 01 -1 01 -1 -1 O O O O O O O O O O O O O O O O O O O O O O O
.--I r-I a--I r-I a--I a--I N N N N N N N N N N N N N N N N N N N N N N N
\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
r-I r-I r-I
Water Year
Page 108 of 165
17N17E07P001M
5,950
5,900 -
N
E 5,850
C6
I
5,800
O
71
C6
CU 5,750 -
W
i
N
j 5,700
Q 5,650
L
GS Elevation
5,600 WSE
Historic Low WSE
5,550
rn o rI N m v m LD n 00 rn o r1 N m v m to n 00 m o r1 N m v m a r` 00 M o r-I N
00 0) 0) O 0) 0) O O 0) O O O O O O O O O O O O -4 ci ci ci ci r-I r-I r-I r-I r-I N N N
O) of of of of of O) O) of O O O O O O O O O O O O O O O O O O O O O O O O O
rl i--I -4 r-I -4 -4 r-I r-I -4 -1 -1 N N N N N N N N N N N N N N N N N N N N N N N
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci .-� ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci
Water Year
Page 109 of 165
17N17E18C001M
5,950
5,900
N �
E 5,850
C6
i
5,800
Q
aj
fu
Q 5,750 -
W
L
N
5,700 -
C
Q 5,650 - -
L
GS Elevation
5,600 I I I I WSE -
Historic Low WSE
5,550
m O N N m v in �D r` oo m O N N m a Ln �D r` oo rn O N N m a Ln �D r` oo rn O N N
00 Ql Ql Ol Ql Ql Ol Ol Ql Ol Ol O O O O O O O O O O N N N N N N N N N
Ol Ql Ql Ol Ql Ql Ol Ol Ql Ol Ol O O O O O O O O O O 0 0 0 0 O O O O O O O O O
-I N N N N N N N N N N N N N N N N N N N N N N N
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
Water Year
Page 110 of 165
18N17E33LOO1M
5,950
5,900 -
N
E 5,850 --
C6
I
5,800 -
0 -
t'6
(3) 5,750
7�4
i
N
j 5,700 — --
Q 5,650
L
GS Elevation
5,600 WSE
Historic Low WSE
5,550
rn o r-I N m v m LD n 00 rn o r1 N m v m to n 00 m o r1 N m v m a r` 00 m o r-I N
00 0) 0) O 0) 0) O O 0) O O O O O O O O O O O O r-I r-I r-I r-I r-I a--I r-I r-I r-I r-I N N N
O) of of of of of O) O) of O O O O O O O O O O O O O O O O O O O O O O O O O
r-I i--I 1-I r-I 1-I 1-I r-I r-I 1-I r-I r-I N N N N N N N N N N N N N N N N N N N N N N N
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci .-� ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci
Water Year
Page 111 of 165
17N16E13K001M
5,950
5,900
N
E 5,850
C6
i
5,800 —
0
aj
t'f3
(3) 5,7507T
—
W
i
N
Cu 5,700 -- —
Q 5,650
L
GS Elevation
WSE
5,600 ------
Historic Low WSE
5,550
m O N N ro v in �D r` oo m O N N ro v in �D r` oo m O N N ro a Ln �D r` oo m O N N
00 Ol Ol Ol Ol Ol O O O O O O O O O O N N N N N N N N N
Ol m m Ol m m Ol Ol m Ol Ol O O O O O O O O O O 0 O O 0 O O 0 O O 0 O O O
-I N N N N N N N N N N N N N N N N N N N N N N N
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
Water Year
Page 112 of 165
Fibreboard (TH)
5,950
5,900
N
E 5,850
C6
i
5,800
O
aj
C6
(3) 5,750
W
i
N
j 5,700
Q 5,650
L
GS Elevation
5,600
WSE
Historic Low WSE
5,550
10/2010 10/2011 10/2012 10/2013 10/2014 10/2015 10/2016 10/2017 10/2018 10/2019 10/2020 10/2021 10/2022
Date
Page 113 of 165
Prosser Village (TH)
5,950
5,900
N -
E 5,850
C6
C: 5,800
O
aj
C6
CU 5,750
W -
i
Cu
j 5,700
Q 5,650
L
GS Elevation
5,600
WSE
Historic Low WSE
5,550
10/2010 10/2011 10/2012 10/2013 10/2014 10/2015 10/2016 10/2017 10/2018 10/2019 10/2020 10/2021 10/2022
Date
Page 114 of 165
Martis Valley (TH)
5,950
5,900
N
5,850
C6
i
C— 5,800
0
a--+
C6
QJ 5,750
W
L
N
CO 5,700
Q 5,650
rLn -
GS Elevation
5,600
WSE
Historic Low WSE
5,550
10/2010 10/2011 10/2012 10/2013 10/2014 10/2015 10/2016 10/2017 10/2018 10/2019 10/2020 10/2021 10/2022
Water Year
Page 115 of 165
17N16E13K003M
5,950
5,900
N
E 5,850
C6
I
5,800 -
O
aj
C6
> I I I I
CU 5,750 —
W
i
N
5,700 --
),**"FAAA
Q 5,650
L
GS Elevation
5,600
WSE
Historic Low WSE
5,550 —
rn o r-I N m v m LD n 00 rn o r1 N m v m to n 00 m o r1 N m v m w r, 00 m o r-I N
00 0) 0) O 0) 0) O O 0) O O O O O O O O O O O O -4 ci ci ci ci r-I r-I r-I r-I r-I N N N
O) of of of of of O) O) of O O O O O O O O O O O O O O O O O O O O O O O O O
r-I r-I 1-I -1 -1 N N N N N N N N N N N N N N N N N N N N N N N
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci rl ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci
Water Year
Page 116 of 165
17N17E05D001M
5,950
5,900 -
N
E 5,850 --
C6
I
5,800 -
Q
aj
C6 GS Elevation
Q 5,750 WSE
W
i
Historic Low WSE
j 5,700 ---------
Q 5,650
L
5,600 —
5,550
01 O r-I N rn m l0 n m m O r-I N M -0 m l0 n m m O r-I N M 'T m l0 n W m O r-I N
m 0) 0) a) m 01 0) m 0) m 0) O O O O O O O O O O 0 0 0 0 0 0 0 0 0 0 N N N
Ol Ol m Ol 01 01 -1 01 -1 -1 O O O O O O O O O O O O O O O O O O O O O O O
a--I r-I a--I a--I N N N N N N N N N N N N N N N N N N N N N N N
\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
a--I r-I r-I a--I r-I r-I r-I
Water Year
Page 117 of 165
17N16E17F002M
5,950
5,900
N
E 5,850
C6
I
C— 5,800
0
a--+
C6
QJ 5,750
W
i
N
5,700
Q 5,650 --------
L
GS Elevation
5,600 —WSE
Historic Low WSE
5,550
Ol O r-I N M Ln lD I, 00 Ol O r1 N M Ln lD I, 00 Ol O r-I N M 't Ln %D n 00 m O r-I N
00 Ol Ol Ol Ol O) O) Ol Ol Ol Ol O O O O O O O O O O -4 ci -4 -4 ci ci ci -4 -i c-1 N N N
Ol O) O) Ol Ol Ol Ol M m m Ol O O O O O O O O O O O O O O O O O O O O O O O
r-I r-I r-I 1-1 -4 -1 -1 -4 -4 -4 -1 N N N N N N N N N N N N N N N N N N N N N N N
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci r-I ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci
Water Year
Page 118 of 165
17N17E29B001M
5,950
5,900 —
N
E 5,850 -
C6
i
5,800 -
O
aj
C6
5,750
W
i
N
Cu 5,700 ------
Q 5,650
L
GS Elevation
5,600 WSE
Historic Low WSE
5,550
M O 1 N rn Ln l0 r- 00 m O -1 N rn t Ln l0 I, 00 0) O 1 N M 'T Ln l0 I" 00 0) O -1 N
00 Ol Ol Ol Ol 01 01 Ol 41 Ol Ol O O O O O O O O O O �--I a--I a--I r-I a--I a--I r-I a--I a--I r-I N N N
Ol Ol m Ol 01 01 a> 01 a> -1 O O O O O O O O O O O O O O O O O O O O O O O
a--I N N N N N N N N N N N N N N N N N N N N N N N
\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
Water Year
Page 119 of 165
18N16E22H001M
5,950
5,900
N
E 5,850
C6
I
5,800
0
aj
C6
(3) 5,750
W
i
N
j 5,700 ------
Q 5,650
L
GS Elevation
5,600 —
WSE
Historic Low WSE
5,550
M O r-I N rn m l0 n m m O r-I N M -0 m %D n m m O r-I N M 'T m %D n W m O r-I N
00 Ol Ol Ol Ol 01 01 Ol 41 Ol Ol O O O O O O O O O O �--I a--I a--I r-I a--I a--I r-I a--I a--I r-I N N N
01 01 01 01 01 1-I 1 01 -1 01 -1 -1 O O O O O O O O O O O O O O O O O O O O O O O
.- r-Ia--I r-I a--I a--I N N N N N N N N N N N N N N N N N N N N N N N
\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
a--I r-I r-I
Water Year
Page 120 of 165
17N16E11F001M
5,950
5,900
N
E 5,850 - —
C6
I
5,800
0
a--+
C6
5,750
LU
i
N
C6 5,700
0 5,650
L
GS Elevation
5,600 WSE
Historic Low WSE
5,550
M O r-I N rn m l0 n 00 M O r-I N M -0 m l0 n 00 m O r-I N M 'T m l0 r, 00 m O r-I N
00 Ol 0) 0) 0) 0) 01 Ol 01 Ol Ol O
m (n Ol m m M M M 0) M M O O O O O O O O O O O O O O O O O O O O O O O
-1 r-I -1 -1 N N N N N N N N N N N N N N N N N N N N N N N
\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
r-I r-I r-I
Water Year
Page 121 of 165
17N17E19K001M
5,950
5,900
N
E 5,850
C6
I
5,800
aj
C6
5,750
W
i
N
j 5,700 ----
Q 5,650
L
GS Elevation
5,600 WSE
Historic Low WSE
Note: Well was destroyed, no measurements after Dec 2021 -
5,550
M O r-I N rn * M l0 n M M O r-I N M -0 M %D n M M O r-I N M 'T M %D n M M O r-I N
00 Ol Ol M Ol M M M a1 M M O O O O O O O O O O 0 0 0 0 0 0 0 0 0 0 N N N
01 01 01 01 01 11 01 -1 01 -1 -1 O O O O O O O O O O O O O O O O O O O O O O O
.--I r-I a--I r-I a--I a--I N N N N N N N N N N N N N N N N N N N N N N N
\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
r-I r-I r-I
Water Year
Page 122 of 165
17N17E07P001M
5,950
5,900 -
N
E 5,850
C6
I
5,800
O
71
C6
CU 5,750 -
W
i
N
j 5,700
Q 5,650
L
GS Elevation
5,600 WSE
Historic Low WSE
5,550
rn o rI N m v m LD n 00 rn o r1 N m v m to n 00 m o r1 N m v m a r` 00 M o r-I N
00 0) 0) O 0) 0) O O 0) O O O O O O O O O O O O -4 ci ci ci ci r-I r-I r-I r-I r-I N N N
O) of of of of of O) O) of O O O O O O O O O O O O O O O O O O O O O O O O O
rl i--I -4 r-I -4 -4 r-I r-I -4 -1 -1 N N N N N N N N N N N N N N N N N N N N N N N
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci .-� ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci
Water Year
Page 123 of 165
17N17E18C001M
5,950
5,900
N �
E 5,850
C6
i
5,800
Q
aj
Cu
Q 5,750 -
W
L
N
5,700 -
C
Q 5,650 - -
L
GS Elevation
5,600 I I I I WSE -
Historic Low WSE
5,550
m O N N m v in �D r` oo m O N N m a Ln �D r` oo rn O N N m a Ln �D r` oo rn O N N
00 Ol Ol O Ol Ol O O Ol Ol Ol O O O O O O O O O O N N N N N N N N N N
Ol Ql Ql O) Ql Ql O) O) Ol Ol Ol O O O O O O O O O O 0 O O 0 O O O O O 0 O O O
r-I r-i i--I r-i r-I N N N N N N N N N N N N N N N N N N N N N N N
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
Water Year
Page 124 of 165
18N17E33LOO1M
5,950
5,900 —
N
E 5,850 --
C6
I
5,800 —
0 -
aj
t'6
(3) 5,750
W
i
N
j 5,700 — --
Q 5,650
L
GS Elevation
5,600 WSE
Historic Low WSE
5,550
M O r-I N rn Ln l0 r, 00 M O r-I N M -o Ln ko I, 00 01 O -1 N M t Ln l0 r, 00 01 O r-I N
00 Ol Ol m Ol M M M a1 M M O O O O O O O O O O 0 0 0 0 0 0 0 0 0 0 N N N
01 01 m 01 11 01 a> 01 a> a> O O O O O O O O O O O O O O O O O O O O O O O
.--I r-I a--I r-I a--I a--I N N N N N N N N N N N N N N N N N N N N N N N
\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
a--I r-I r-I a--I r-I r-I a--I a--I r-I a--I a--I r-I r-I
Water Year
Page 125 of 165
17N16E13K001M
5,950
5,900
N
E 5,850
C6
i
5,800 —
0
aj
t'f3
(3) 5,7507T
—
W
i
N
Cu 5,700 -- —
Q 5,650
L
GS Elevation
WSE
5,600 ------
Historic Low WSE
5,550
m O N N ro v in �D r` oo m O N N ro v in �D r` oo m O N N ro a Ln �D r` oo m O N N
00 Ol Ol Ol Ol Ol O O O O O O O O O O N N N N N N N N N
Ol m m Ol m m Ol Ol m Ol Ol O O O O O O O O O O 0 O O 0 O O 0 O O 0 O O O
-I N N N N N N N N N N N N N N N N N N N N N N N
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
Water Year
Page 126 of 165
Fibreboard (TH)
5,950
5,900
N
E 5,850
C6
i
5,800
O
aj
Cu
(3) 5,750
W
i
N
j 5,700
Q 5,650
L
GS Elevation
5,600
WSE
Historic Low WSE
5,550
10/2010 10/2011 10/2012 10/2013 10/2014 10/2015 10/2016 10/2017 10/2018 10/2019 10/2020 10/2021 10/2022
Date
Page 127 of 165
Prosser Village (TH)
5,950
5,900
N -
E 5,850
C6
C: 5,800
O
aj
C6
CU 5,750
W -
i
Cu
j 5,700
Q 5,650
L
GS Elevation
5,600
WSE
Historic Low WSE
5,550
10/2010 10/2011 10/2012 10/2013 10/2014 10/2015 10/2016 10/2017 10/2018 10/2019 10/2020 10/2021 10/2022
Date
Page 128 of 165
Martis Valley (TH)
5,950
5,900
N
5,850
C6
i
C— 5,800
0
a--+
C6
QJ 5,750
W
L
N
CO 5,700
Q 5,650
rLn -
GS Elevation
5,600
WSE
Historic Low WSE
5,550
10/2010 10/2011 10/2012 10/2013 10/2014 10/2015 10/2016 10/2017 10/2018 10/2019 10/2020 10/2021 10/2022
Water Year
Page 129 of 165
17N16E13K003M
5,950
5,900
N
E 5,850
C6
I
5,800 -
O
aj
C6
> I I I I
CU 5,750 —
W
i
N
5,700 --
),**"FAAA
Q 5,650
L
GS Elevation
5,600
WSE
Historic Low WSE
5,550 —
rn o r-I N m v m LD n 00 rn o r1 N m v m to n 00 m o r1 N m v m w r, 00 m o r-I N
00 0) 0) O 0) 0) O O 0) O O O O O O O O O O O O -4 ci ci ci ci r-I r-I r-I r-I r-I N N N
O) of of of of of O) O) of O O O O O O O O O O O O O O O O O O O O O O O O O
r-I r-I 1-I -1 -1 N N N N N N N N N N N N N N N N N N N N N N N
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci rl ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci
Water Year
Page 130 of 165
17N17E05D001M
5,950
5,900 -
N
E 5,850 --
C6
I
5,800 -
Q
aj
Cu GS Elevation
Q 5,750 WSE
W
i
Historic Low WSE
j 5,700 ---------
Q 5,650
L
5,600 —
5,550
01 O r-I N rn m l0 n m m O r-I N M -0 m l0 n m m O r-I N M 'T m l0 n W m O r-I N
m 0) 0) a) m 01 0) m 0) m 0) O O O O O O O O O O 0 0 0 0 0 0 0 0 0 0 N N N
Ol Ol m Ol 01 01 -1 01 -1 -1 O O O O O O O O O O O O O O O O O O O O O O O
a--I r-I a--I a--I N N N N N N N N N N N N N N N N N N N N N N N
\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
a--I r-I r-I a--I r-I r-I r-I
Water Year
Page 131 of 165