Average Well Yield per Section
Well drillers provide us with information on well yield.
In combination with the well location we can
calculate the average well yield for
specific areas, in this case for
sections.
Salt Springs Reservior
er
Tamarack
er
Ri v
us
i sl a
an
4
o rk
hF
Salt Springs Reservior
er
iv
RD
N
A
No
R
Proof of Ground
Water Map
lum ne
R
i v er
an
i sl a
us
Ri v
er
o rk
hF
er
RD
N
A
rk
Pardee Reservoir
Y2
6
N
AI
RA
NC
New Hogan Reservoir
W
H
Ri
ve
r
49
as
Angels Camp
HW
Copperopolis
45 - 49
Legend
21-50 gpm
1.1 - 5.0
51-100 gpm
5.1 - 20.0
>100 gpm
20.1 - 80.0
80.1 - 2000.0
Y
RD
0.1 - 1.0
RR
11-20 gpm
FE
Yield of ind. Wells (gpm)
HWY 4
S
Data from w ell completion reports
submitted to DWR or CCDEH
Moderate to High
5
!
NE
19%
us
i sl a
an
o rk
Y
hF
RD
N
sR
The recorded information
New Melones Reservior
on well yield, depth etc. in
conjunction with the exact
location of each well can be
Tulloch Reservior
used for a verification and
refinement of the Groundwater
Potential map which is used for
the Proof of Groundwater
Ordinance as established by the
Board of Supervisors in 1999.
Y
33 - 44
BY R
26%
r ee k
HW
Ro c k C
O
5-10 gpm
Murphys
Salt Spring Valley Reservior
Zero to Low
>5 gpm
C
Y4
Y4
HW
Ground Water Potential
17%
A
5
!
er
12 - 32
50 - 59
P
R
Y
16%
Ri v
er
R
EE
HW
17%
St
r
RD
C
D!
5
5
!
Yield rates of
1450 wells in
Calaveras
County drilled
since 1977
4
W
H
D
MO UN T
0 - 11
5%
e
H
San Andreas
ve
Ri
as
er
RR
al a v
u m n e R iv
R
Mountain Ranch
v
ala
FE
Tulloch Reservior
k el
C
rk
Fo
S
Average in gpm
Y
Mo
N
2
k
N
RA
HWY 1
New Melones Reservior
NE
Legend
Fo
r
5
!
5
!
5
!
BY R
HWY 4
th
SH
Valley Springs
O
100 - 600
5
!
49
H WY 1 2
r
uth
So
Copperopolis
Camanche Reservoir
Ri v e
Arnold
9
Y4
Y
20 - 100
S
JE U S M AR IA
HW
ek
HW
5 - 20
So
u
H
Salt Spring Valley Reservior
lum ne
ort
r
ive
sR
D
laver a s Riv er
a
C
H
1-5
5
!
Mok
e
r
No
r
5
!
Y4
HW
Mokelumne Hill H W Y
Nort h
26
Fo r k
rk
RD
RD
Sta
ni s
l au
as
RR
Y4
e
d dle F
26
HW
R ID
GE R
Ri
ve
mn
k el u
Mo
Mi
5
!
Y2 6
Ri
ve
r
Murphys
r
FE
Tulloch Reservior
HW
West Point
o
W
W
H
S
Angels Camp
re
Ro c k C
r th F
o
Y
NE
49
k el
eR
um n
T
OAD LA
F
ve
Ri
as
er
5
!
5
!
iv
R
R
Mo
Y
er
Tamarack
RAIL
R
New Hogan Reservoir
Y2
6
C
R
HW
BY R
C
NC
D
N
MO UN T A I
RA
P
H
San Andreas
v
ala
O
Y
al a v
D!
5
EE
MO
Mountain Ranch
C
rk
Fo
New Melones Reservior
St
4
W
H
5
!
N
HW
Y 12
e
Arnold
5
!
5
!
u m n e R iv
Salt Springs Reservior
RA
Valley Springs
k el
uth
So
49
Mo
N
H
H WY 1 2
k
SH
HW
Y
Fo
r
W
Pardee Reservoir
9
Y4
ee k
th
ort
Fo r k
Nort h
D
laver a s Riv er
a
C
So
u
Y2 6
r
ive
as
26
e
S
JE U S M AR IA
HW
Sta
ni s
l au
sR
Camanche Reservoir
Average in gpm
Mok
e
Y
Mokelumne Hill H W Y
r
H
Salt Spring Valley Reservior
HWY 4
rk
r
r
Murphys
WY 4
Y4
HW
> 1.00
HW
R ID
GE R
Ri
ve
mn
k el u
Mo
5
!
5
!
d dle F
26
H
W
H
Ri
ve
r
Y
49
5
!
Copperopolis
Mi
5
!
RD
RAIL
ROA
AT
D FL
HW
ve
Ri
as
er
5
!
Angels Camp
r
Ro c k C
o
Y
er
Legend
r th F
D
New Hogan Reservoir
West Point
rk
R
C
k el
o
R
H
MO UN T
5
!
N
AI
N
San Andreas
C
AN
Mo
MO
H
R
P
5
!
eR
um n
MO
Y2 6
W
EE
D!
5
Tamarack
r
W
H
St
ive
e
N
RA
H WY 1 2
v
ala
Y2
6
u m n e R iv
C
rk
Fo
C
k el
SH
Mountain Ranch
9
Y4
al a v
Mo
5
!
5
!
2
k
uth
So
HWY 1
i v er
Arnold
HW
Valley Springs
R
lum ne
Y
Fo
r
H
Camanche Reservoir
Mok
e
ort
S
JE U S M AR IA
th
RD
Pardee Reservoir
rk
r
No
r
Ri
ve
5
!
So
u
T
OAD LA
F
Mokelumne Hill H W Y 26
D
R
s
ver
a
a
l
i
v
er
Ca
RAIL
R
Nort h
Fo r k
d dle F
26
HW
R ID
GE R
e
Mi
5
!
Sta
ni s
l au
West Point
o
Y
mn
k el u
o
M
R
o
r th F
In the same way the average yield can be
calculated for all geologic formations,
allowing a rough estimate of the potential
for ground water.
5
!
iv
ke
rk
Mo
ne
l um
Average Yield per
Geologic Formation
49