HomeMy WebLinkAbout12-13-2016 Item 18, CooperUNCI 64 UA
Honorable Mayor Harmon and Council Members, my name is
Allan Cooper and I reside in San Luis Obispo.$'`
With regards to Lake Nacimiento:
The California State Water Resources Control Board undertook
last October an analysis of hydrologic conditions including
reservoir inflow for the Water Year (WY) 2017, 2018, 2019 on
projections based on actual WY 2013, 2014, 2015 conditions
respectively. Their analysis indicates that by the end of Water
Year 2018 Nacimiento will have remaining 6,710 acre feet of
water (see the table on your overhead), 3,590 acre feet below
"dead pool". This means that we will be going into October 2019
totally reliant on Whale Rock water. But no one has done a
similar projection for Whale Rock and we therefore cannot, at this
point, assume we will have ANY water available to us at that
point in time.
Your model projects that you have a greater than five year
supply of water. However, so far Nacimiento has received 2.45
inches to date, only 0.38 inches over what we received last year.
There is no question but that we should have a plan in the event
that California State Water Resources Control Board projections
come true.
I do not mention Salinas Reservoir water, groundwater or
recycled water because these amounts are negligible as
compared to water we receive from both Nacimiento and Whale
Rock.
The Alliance for Water Efficiency put together a report back in
January 2015 stating that the City of San Luis Obispo's water
demand offset program which began in 1990 ended in 2005 due
to the city obtaining a new water supply source (i.e., Lake
Nacimiento). While in effect, the program required a 2:1 offset for
new development and relied on toilet replacements as the
primary demand reduction mechanism, although other efficiency
measures were reportedly allowed and utilized. In light of the
worst case three year projections the State now has for Lake
Nacimiento, it is time to reinstitute this water demand offset
program that we abandoned back in 2005. Thank you!
From:
Allan Cooper
Professor Emeritus, Cal Poly State University, San Luis Obispo, CA
oa
E
w
� a
v
a
e
W C
a
m
a
E
o
E
O
o
c p
u
LL
u
a o
�
`
m
°
u o
w
v
o
v
a"
O Q
v,
o
.'
C 0 ...
M
N
Y
0
m�'^o�y-v
a y
O
•�
�
� O
N
M
A
a
LL
o
O
>
m
Z
Z
O
wCL
m
>
Q
m
m
a
C
O
..moi
H
O
a
C
M K
N
�
oa
N A
_
O
3 N
O
O
O
p Y
u z
A
o ;
a o 0
v E
cQ,
u 3m
v r
�
o
� � v
'� E> LL
0 0
o$ E
w
v E o a
m" �n
F• o
c
o
o
a E a o
v
oa
w $ m
0
m
0 o d g
o
o
O
`1
E
CO U
V >
v v w o
m LL
QI
N
c N K l^O
O N
O O C
O
O
N
LL
V
N
C
N
Y
N K C a?
Q
M E E
O
Q
m° O
3
o o0
w
> z y
L
m Z •-
o
O
o
O
O
o
3 E m v
GJ
E N A
o
ou
° v L
uy z '
m
o
v
c vm
a
w
a`
o c t E` m w
� '« �
m 'o
W> a y LL
a
cn
;
- c ova
W w .3 o E c
N
00 00
N � O � � � � O^ �
Q C Q
3
LD
ry
N
p
w
` N -O p
o o
C V
m. 3
o
ry
a0
o
%u
C m
O k c
M
E
o v o o
C p u
m
Q
N
Z
ar
E
v d y E� .m
o m o:
a 3 a a E 3
m
0 LL
O
,g
!-I c O N y L 'F
L
N � O��
•� N 111
c m¢
y
N
�n
ry
o
M
.�
in
=
u v> ; o
'v v 3 u.
m rl ti
w d
�
C5
0
m L v v
c_ E r
o �°
N w a v° n
VA
3 w
>
Y
c t p > L. aZi
0
a2vm ov r
is c v mL..
.5 00 rq w•i
00 o�
H LL
N
V
Z
E
p J Oa
N� a a N a 7 000 0^ `
Q
N
,a >oa
CL
o
u
o
0000"Ev
m
0
o
n
0
o0
0
Vi a
L y b
E
'E
v .o i `-
`L' a� v E c
(U
ko ID W
eY` O m v1 m N a 0 � 0
0 %
07
�
O
t'
N
N
\
rl
\
N
Z
N rtl V U N p
m m �. N .0
t0
m N� m 0 0 0 0
o
o
m
o
0
E
m v v E a v
3
C
v
L
_
0
W m a N o 0 u
a o N a o 0 0� Z
0
m
} a
E
°
:° v0
2- °°° u •Y
C
>
i
�
« H
c
v
v
w
v E v w t o
LL
n
u
m
3
v
u o_
oo v= v
:9 0.
r`-
o c
f0
c_C
N � G
c
N
Z
,
C
-00 ° m � 10 N m
CML
}
d
>
>
>>>
E
4 o o W
a s 3
N
>
—
O
?
C
N
O O
O '� N v C
a
Q
z
Q
oca
v N N
v- 30:
°°0_L)
E
O
O
o
O� v N Y Z ZH
Ll
-6
W
a
m�'^o�y-v
•�
�
O
N
M
A
d
v,
O
m
..moi
H