HomeMy WebLinkAbout04/16/1991, 1A-PT.2 - RECONNAISSANCE REPORT ON NACIMIENTO RESERVOIR WATER DIVERSION AS A WATER SUPPLY FOR THE CITY OF SAN LUIS OBISPO. �II�IUI�yIIIWIIIIIIIuIiIIUIU ".7 r MEETING DATE:
Cio san lues osispo April 16, 1991
COUNCIL AGENDA REPORT ITEM1.4
NUMIfff
BER:
FROM:
William T. Hetland, Utilities Director U�
Kenneth M. Weathers, Water Division Manage
Gary W. Henderson, Utilities Enginee3��
SUBJECT:
RECONNAISSANCE REPORT ON NACIMIENTO RESERVOIR WATER
DIVERSION AS A WATER SUPPLY FOR THE CITY OF SAN LUIS OBISPO.
CAO RECOMMENDATION:
Staff recommends that the City pursue as expeditiously as
possible obtaining water from Nacimiento Reservoir. The initial
step is to obtain a formal water entitlement from the County and
determine the feasibility of other agencies participating in a
joint project. Preliminary design and environmental review would
then be contracted for with outside firms.
REPORT IN BRIEF
The County of San Luis Obispo has entitlement to water at
the Nacimiento Reservoir. The City of San Luis Obispo in
interested in obtaining a portion of those rights to meets its
long term and short term emergency water needs. This is a
reconnaissance level report which reviewed the feasibility of
using Nacimiento water. The report relied heavily on existing
data. It identifies two alternatives for obtaining water from
Nacimiento Reservoir. The first is a pipeline alignment that goes
from the Nacimiento Reservoir south to the Whale Rock Reservoir
where the existing conveyance system would send it into San Luis i
Obispo. The second alignment would run south from Nacimiento
reservoir to an afterbay, then to the Cuesta Grade where it would
tie into the existing Salinas Reservoir pipeline then to the
City's treatment plant. It was assumed that only the City would
participate in this project. Inter governmental agreements were
identified as a potential problem. Some environmental concerns
were identified including construction and growth inducing
impacts. The project is estimate to cost $25, 000,000 and would
take approximately 45 months to complete.
BACKGROUND
At the March 19, 1991 City Council meeting, Council
requested staff to provide information for a meaningful and in-
depth discussion of the Nacimiento Project from existing
information. Staff efforts included studying existing reports,
updating information, determining adequacy of existing reports,
and meeting with county and city officials.
This report addresses two alternatives for providing water
to the City from San Luis Obispo County's allocation of water in
Nacimiento Reservoir. For simplification the alternatives assume
that the City would develop a system to deliver 3, 000 of per year
�►►�ai�►►�IIIIIII�I��II�III city of San tuts OBISPO
COUNCIL AGENDA REPORT
with no participating agencies to share in the delivery
expense of water. The assumption was also made that the County
would provide a 3, 000 of allocation to the City.
GENERAL PROJECT INFORMATION
Nacimiento Dam and Reservoir are owned and operated by the
Monterey County Flood Control and Water Conservation District
(Monterey District) .
San Luis Obispo County is entitled to 17, 500 acre-feet of
water from Nacimiento Reservoir under an agreement between San
Luis Obispo County Flood Control and Water Conservation District
(District) and the Monterey District executed in 1959. 11300
acre-feet has been contracted for use around the lake area,
leaving 16, 200 acre-feet available for distribution to other
parts of the County.
There has been no allocation of the remaining 16, 200 acre-
feet to potential users within the County. In 1979, steps were
initiated for a vote by the electorate on a bond issue for
constructing a distribution system to deliver water from
Nacimiento Reservoir throughout the county. At that time the
water was 45% oversubscribed for by potential water agencies
within the County.
Because the District holds an entitlement to Nacimiento
water, it is making payments to the District. These include $9
per acre-foot as capital repayment for construction of the dam
and approximately $3 to $4 per acre-foot for operation and
maintenance. The capital portion of the cost will be fully
repaid by 2004. This results in a total annual cost of $39, 000
for 3, 000 AF. The cost of distribution would be added when
facilities are built.
There have been no treatment or transportation facilities
built to distribute this water.
RELIABILITY
The capacity of Nacimiento Reservoir is 350, 000 of with
annual releases of approximately 190,000 of per year to Monterey
County. The agreement with Monterey District provides that under
critical conditions San Luis Obispo County has first priority for
its water entitlement and further, that at least one-half of the
water required for the following years' entitlement will be held
over in storage in the lake. Since the reservoir was completed
in 1957 the County's entire 17,500 acre foot allotment could have
been delivered with the possible exception of 1977. Additional
analysis is needed to verify the reliability.
In this extended period of drought the City is very
conscious of water sources dependent upon local rainfall. Any
Nacimiento alternative is dependent on rainfall in this region.
WATER QUALITY
Water quality in the lake is affected by the recreational
facilities around the lake, seasonal drawdowns, and periods of
rapid runoff in the winter months. Water quality would be
���ti�ib►►►�NIIIII�� �����II MY Of san tuts OBISPO
COUNCIL AGENDA REPORT
improved through settlement by retention in Nacimiento and Whale
Rock reservoirs. The mineral content of the Nacimiento water is
slightly better than either the Salinas or Whale Rock reservoirs.
All additional drinking water quality standards have been tested
by San Luis County. All presently regulated water quality
standards, including Mercury levels, are well below Maximum
Contaminant Levels.
The County has no records which would indicate whether the
Nacimiento water would meet proposed standards for THM levels.
COUNTY PARTICIPATION
As stated earlier the San Luis Obispo County Flood Control
and Water Conservation District has the entitlement to the
Nacimiento water. Any utilization of the District's Nacimiento
rights by the city of San Luis Obispo could occur only with
cooperation of the District. At the very least this would
involve an allocation being made to San Luis Obispo for the City
to transport water in any way it deemed feasible. At the most,
the City would be one part of a larger project and would share in
an allocation of water and expenses of the project undertaken by
the District. In the former case the City would control the pace
of the project. In the latter case the County would most likely
be the lead agency. The present permit from the State Water
Rights Board addresses diversion of Nacimiento water to "Zone 211 .
This zone does not include the City, therefore transportation of
water to the City would require that the County obtain approval
from the State Water Rights Board.
The County has not yet made a decision on the State Water
Project. The "San Luis Obispo County Master Water Plan Update, "
March 1986, recommended several actions. The first action was to
"request that the Department of Water Resources conduct a study
of implementation of the State Water Project's Coastal Branch for
San Luis Obispo County's full entitlement; this would meet the
projected demand (with conservation) for the supplemental water
to about year 2010. " The sixth action was to "Start planning now
to develop local resources to meet water demands beyond year
2010. specifically, consider construction of a pipeline to bring
water from Nacimiento Reservoir as the next logical step for
meeting demand up to about 2025 . . . . ". It is unclear how the
County would view use of part of their Nacimiento allocation
relative to the proposed State Water Project.
OTHER PARTICIPATING AGENCIES
For the purpose of this report it has been assumed that the
City could not participate with other agencies. There exists a
potential of participation with either alternative. Alternative
No. - 1 (Whale Rock) has a clear potential of participation with
Cayucos, Morro Bay, CMC, Cal Poly, the County, and possibly
others. Alternative No. 2 (Cuesta Grade) has a clear potential
i��N���i►►�Illllll�p1iP11u���Ulll city of san Luis osIspo
Wii% COUNCIL AGENDA REPORT
of participation with Paso Robles, Templeton, Atascadero, Santa
Margarita, the County, and possibly others.
Participation with other agencies has the advantage of
recognizing economies of scale in construction and sharing
operating and maintenance costs. Participating with other
agencies may also have a benefit in obtaining support from the
County.
Participation also has disadvantages of contributing to the
complexity of the project, requiring inter-agency agreements, and
significantly increasing the growth inducing environmental
impact. All of these factors would add delays to implementation
of any project.
Participating with other agencies would most likely result
in the County being the lead agency in the project.
ALTERNATIVE SUPPLY ROUTES
This report will address two alternative supply routes.
Although other routes may be possible, existing reports and
studies do not provide sufficient detail to accurately compare
other alternatives.
The two routes are the Nacimiento to Whale Rock Reservoir
route (Alt 1) , and the Nacimiento to San Luis Obispo route via
Paso Robles and Cuesta Grade (Alt 2) . Schematic drawings of the
approximate route locations are enclosed as attachments #1 and #2
respectively.
ROUTE COMPARISON
The two alternate routes are compared relative to their
construction cost, operating and maintenance (O & M) cost,
environmental considerations, and total time to obtain water.
Some of the cost factors used are common to cost factors used in
the desalination study. This was done in order to provide some
scale of comparison of these two alternative routes with the cost
of desalination.
Both of these alternatives were evaluated assuming no other
agency was participating in the project. Both of these
alternatives have some potential for power recovery but that has
not been addressed in this report because of limited information.
The scope of all previous studies was different than the
City of San Luis Obispo would probably undertake. Costs used in
this report are general in nature and were derived from existing
studies. Preliminary engineering has not been completed on
either of these alternatives. For these reasons care should be
taken in making direct comparisons between these alternatives and
other alternatives.
a -
����i���H►�IIIIIII�Pp1 ��I�U City OF San tins OBISPO
COUNCIL AGENDA REPORT
ALTERNATE NO. 1 (Nacimiento to Whale Rock Reservoir)
GENERAL:
The Nacimiento water is pumped through 24 .4 miles of 18"
diameter high pressure pipe from Nacimiento Reservoir to a
tributary creek just above Whale Rock Reservoir. The water then
gravity flows down into Whale Rock Reservoir (see Attachment #1) .
From Whale Rock Reservoir it is pumped through the existing Whale
Rock pipeline to the City water treatment plant.
In evaluating this alternative it is assumed that the
existing Whale Rock facilities are capable of transporting the
Nacimiento water in addition to the Whale Rock water. If
alternative No. 1 was selected the Whale Rock agreement would
most likely need revision. The revisions might compensate the
other participants in the Whale Rock project for capital and
operating costs and would also revise operating procedures.
COST FACTORS - CONSTRUCTION
The major facilities constructed include pipeline and a pump
station. The construction cost estimate for all facilities was
derived from existing reports. Base costs for similar projects
with similar facilities were used with adjustments made using ENR
Construction Cost Index. Percentage (%) cost factors for
engineering, legal, administration, and contingencies were the
same as used in the desalination project. This was done to
facilitate comparison between the alternatives. Each cost was
developed using several approaches to insure that the final costs
were correct in order of magnitude. Details of the capital costs
are included in Atch. No. 3 .
Total capital cost for Alt. # 1 was $25, 631, 000. Amortized
over twenty years at eight (8%) percent interest would result in
an annual cost of $2,417,795 or $806 per acre foot.
COST FACTORS - Operating and maintenance (O&M)
The operation of this system would be similar to that
presently undertaken by City employees at Whale Rock Reservoir.
The major O&M costs include labor and materials, replacement
costs, County reimbursement fees, and power consumption. There
were no studies found which contained sufficient information to
develop reliable O&M costs for Alt. No. 1. Reliable cost
information for Alt. No. 2 . appears later in this report. Some
general statements comparing the O&M cost of the two alternatives
can be made.
Relative to Alt. No. 2, Alt. 1 has less head to pump, has
more distance to pump, and less opportunity for power recovery.
The general conclusion is that power consumption may be slightly
less for Alt. No. 1.
Alt. No. 1 could utilize the present facilities, equipment,
and personnel at Whale Rock. This would avoid some duplication
and improve efficiency on a per AF basis relative to Alt. No. 2.
'��Hai�►►►�IIIiI(Ipp��u►�����N MY of San lU1S OBISp0
COUNCIL AGENDA REPORT
Utilization of these personnel and facilities would require an
agreement with the Whale Rock Commission. Overall labor costs
for Alt. No. 1 should be less than Alt. No. 2 .
Replacement cost for Alt. No. 1 would be slightly less than
Alt. No. 2 because there would be fewer capital facilities.
There would be some cost incurred in Alt. No. 1 to reimburse
Whale Rock Commission for the use of their capital facilities.
The shared cost with the Whale Rock Commission on Whale Rock's
portion of the line may reduce the per AF replacement cost.
County reimbursement charges would be the same for either
alternative.
Because of the lack of more precise information we can
conclude that O&M cost for Alt. No. 1 are probably less than Alt.
No. 2 . The total O&M cost for Alt. No. 2 is $246/AF.
ENVIRONMENTAL CONSIDERATIONS:
The construction of pump stations and pipe lines raises
issues of disturbance of soils and plants. These issues would be
addressed in an EIR.
Water diversion between basins may be determined to be a
significant impact.
White Bass presently exist in Nacimiento lake and do not
exist in Whale Rock Reservoir. The introduction of White Bass
into Whale Rock through pumping of water would be detrimental to
the present fish population in Whale Rock Reservoir. This item
would have to be addressed in the EIR.
Additional stream flow would be added to a tributary to Whale
Rock Reservoir. It is not known if this would be a significant
impact. If it is determined that this would be a significant
impact the pipe line could be extended an additional 2 miles to
the reservoir.
Growth inducement is a factor that has to be addressed in
relation to any new permanent water source. Participation with
other water agencies on this project would increase and
complicate the growth inducing impact and would require
additional environmental review.
Economic effect on the recreational value of Nacimiento
Reservoir could be negative. Much of the recreational value of
the reservoir relies upon a volume of water in the reservoir
which is conducive to water sports and is aesthetically pleasing.
Any use of water by any County water agency could be detrimental
to the recreational value of the reservoir. This impact would be
more severe in a period of drought.
Economic effect on property values of the land adjoining and
in the immediate vicinity of Nacimiento Reservoir could be
negative. Much of the value of this property is derived from its
proximity to the lake and its recreational value. There is at
least one group of property owners in the area (N.R.W.M.A.C. ) who
have expressed concern about the present and future diversions
lA �
11111111IIIIIIIIP� 11111 city of San LUIS OBIS130
COUNCIL AGENDA REPORT
from the reservoir.
ESTIMATED TIME SCHEDULE:
The estimate of time to complete this project is based upon
past experience with similar projects and from other sources.
For clarity the total project time schedule is broken into blocks
of time for different phases. These phases include governmental
agreements, preliminary design, E. I.R./permits,
design/R.O.W./permits, and shop drawings/construction. A time
line for all of these phases is shown in Atch. #5.
Governmental agreements include the time to negotiate and
obtain an agreement between the City and the County of San Luis
Obispo. This includes the minimum time for preliminary
communications, meetings, public hearings, decision making,
formal negotiations, and final agreements. Participation with
other agencies would extend this schedule considerably. The
estimate of 6 months for this process is a minimum time estimate.
There are many factors which could extend this time considerably.
Preliminary design includes the time to select engineering
firm, develop and analyze alternative designs, hold public
hearing, and select a preferred alternative. This process should
not begin until the governmental agreements are complete. The
preliminary design phase is estimated to require 9 months.
Environmental Impact Statement/permits include the time to
prepare and process the E.I.R. Writing the E.I.R. could commence
when the preliminary design is approximately two-thirds complete
and a scope of project has been defined. The County
Environmental Coordinator estimated that this would require 10 to
12 months.
Design/R.O.W./bidding includes the selection of an
engineering firm, R.O.W. definition and acquisition, preparation
of plans and specifications, and bidding of the construction
project. This process could commence when the E.I.R. was
approximately one-half complete. The design is estimated to
require 12 months to complete.
Shop drawing/construction includes the entire process of
construction from award of bid to completion. This phase could
not begin until design is complete. Shop drawings for a project
of this size would take about 4 months. Pipe manufacturers have
estimated it would take about 8-10 weeks to begin delivery of
this pipe and that it could be produced at the rate of 1, 000 feet
per day. Construction would not start until a significant supply
of pipe was in inventory on site. Actual construction is
estimated to progress at a rate of 1,200 feet per day using three
crews, each installing 400 feet per day.
Total time to complete this project is estimated at 44.5
months. If the project commenced on May 1, 1991, water could
flow into the City on Jan. 15, 1995.
!&A) r
"1111NVIIIII�$IXI111 city of San Luis OBlspo
1 COUNCIL AGENDA REPORT
ALTERNATE NO. 2 (Nacimiento to San Luis Obispo via Paso
Robles and Cuesta Grade)
GENERAL:
The water is pumped by two pump stations through -33 miles
of 18" diameter high pressure pipe from Nacimiento Reservoir
through Paso Robles, down Hwy 101 to a point where it connects
with the existing City water line from Salinas Reservoir. This
point of connection is approximately 3 miles north of the Cuesta
tunnel. From this point the water gravity flows through the
tunnel and on to the City water treatment plant at San Luis
Obispo. A 500 of afterbay would be constructed to hold the water
for a total of 30 days after leaving Nacimiento. (see attachment
#2) . The afterbay is required by the State since Nacimiento is a
body contact reservoir.
In evaluating this alternative it was assumed that the
existing City water line from Salinas Reservoir has sufficient
capacity to carry the additional water from Nacimiento.
Additional analysis will be necessary to verify this.
Modification to the existing Cuesta tunnel may also have to be
made since the State Water Project Coastal Branch is currently
designed to share use of the tunnel.
COST FACTORS - CONSTRUCTION
The major facilities constructed include pipeline, an
afterbay, and two pump stations. The construction cost estimate
for all facilities was derived from existing reports. Base costs
for similar projects with similar facilities were used with
adjustments made using ENR Construction Cost Index. Percentage
(%) cost factors for engineering, legal, administration, and
contingencies were the same as used in the desalination project
to facilitate comparison between the alternatives. Each cost was
developed using several approaches to insure that the final costs
were correct in order of magnitude. Details of capital costs are
included in Atch. #4 .
Total capital cost for Alt. # 2 was $36,980, 000. Amortized
over twenty years at eight (8%) percent interest would result in
an annual cost of $3,488. 092 or $1, 163 per acre foot.
COST FACTORS - OPERATION AND MAINTENANCE (O&M)
The operation of this system would be similar to that
presently undertaken by City employees at Whale Rock Reservoir.
The major O&M costs include labor and materials, replacement
costs, County reimbursement fees, and power consumption. All
cost estimates presented are the best preliminary estimates that
staff is able to develop from available information. More
accurate cost estimates depend upon completion of preliminary
design.
Power consumption is the major component of operating costs.
The cost of power is based upon a $ . 10 per KWH power rate plus a
"����►�►ii�llillll�In ���pl MY Of San lues OBI SPO
UNCas COUNCIL AGENDA REPORT
10% demand charge. The California Energy Commission estimates
the cost of power to increase 6-10 % per year for the next 5-10
years.
There is a possibility that energy costs could be reduced by
constructing an additional storage reservoir on the south side of
Cuesta Grade and thereby taking advantage of a 50% savings for
non-peak hour power rates. This alternative was not evaluated in
past reports or studies. Energy recovery was factored into this
cost analysis.
Labor and material cost estimates were based upon the
estimated personnel requirements plus 35% for labor overhead and
60% for general expenses. Employee duties would be similar to
those performed at Whale Rock Reservoir.
An annual cost allowance was made for contributions to a
replacement of pumps and power recovery equipment during the
project repayment period.
The County pays fees to the Monterey District and also may
incur additional costs relative to this project which it would
pass on to any agency using water. The charges to the County
from the Monterey District include a $9 per AF capital
improvements charge and a Monterey District 0&M charge of about
$4/AF/Yr. In addition, there is an assumption that there may be
an additional charge by San Luis Obispo County estimated at $4
/AF/Yr.
All AF costs were based upon 3,000 AF/Yr. Labor costs per
AF would decrease if the amount of water pumped per year was
increased due to participation with other agencies.
OPERATING AND MAINTENANCE COST SUMMARY
Cost Est.
Description Per AF
Power consumption $ 121
Labor 91
Replacement 17
County reimbursements 17
Total $ 246
ENVIRONMENTAL CONSIDERATIONS:
The construction of pump stations and pipe lines raises
issues of disturbance of soils and plants. These issues would be
addressed in an EIR. These issues are directly proportional to
the amount of disturbance of land for construction for new
facilities. For this reason Alt. No. 2 could have a more
significant impact than Alt. No. 1.
Water diversion between basins may be determined to be a
significant impact.
������►�N►�IIIIIII�I►il���l city of San tins OBlspo
COUNCIL AGENDA REPORT
White Bass are not a significant environmental consideration
in Alt. No. 2
Growth inducement is a factor that has to be addressed in
relation to any new water source. Participation with other water
agencies on this project would increase and complicate the growth
inducing impact and would require additional environmental
review.
Economic effect on the recreational value of Nacimiento
Reservoir could be negative. Much of the recreational value of-
the Reservoir relies upon a volume of water in the Reservoir
which is conducive to water sports and is aesthetically pleasing.
Any use of water by any County water agency could be detrimental
to the recreational value of the reservoir. This impact would be
more severe in a period of drought.
Economic effect on property values of the land adjoining and
in the immediate vicinity of Nacimiento Reservoir could be
negative. Much of the value of this property is derived from its
proximity to the lake and its recreational value. There is at
least one group of property owners in the area (N.R.W.M.A.C. ) who
have expressed concern about the present and future diversions
from the reservoir.
ESTIMATED TIME SCHEDULE: The estimate of time to complete
Alt. #2 is the same as that for Alt. No. i except for two major
time factors.
Alt. #2 includes the construction of a dam and afterbay.
This facility would require significantly more time for dam
permitting and environmental review. This additional time is
estimated at 6 months.
Alt. #2 includes 8. 6 more miles of pipeline to construct
than Alt. #1. It is estimated that this would require about 2
more months to construct.
Total time to complete this project is estimated at 52.5
months. If the project commenced on May 1, 1991, water could
flow into the City on Sept. 15, 1995.
r A
������►►i�ullllllllll�►'�°►9�U111 city of San Luis OBlspo
AMara COUNCIL AGENDA REPORT
SUMMARY
----------------------------------------------------------------
DESCRIPTION ALT NO. 1 ALT NO. 2
---------------------------------------------------------------
Capital Cost $25, 631, 000 $36,980, 000
(total)
Capital Cost $806 $1, 163
(per AF)
O&M Cost less than $246 $246
(per AF)
-----------------------------------------------------------------
Total Cost
(per AF) less than $1, 052 $1, 409
----------------------------------------------------------------
Time Schedule 44 .5 mos. 52.5 mos.
"Completion Date" Jan. 15, 1995 Sept. 15, 1995
Other Significant
Factors Whale Rock comm. Afterbay
White Bass Power consumption
8.6 miles pipeline
Cuesta tunnel
PROJECT ALTERNATIVES
Nacimiento Reservoir offers a viable alternative to the City for
increased water resources, even though the above analysis shows
Nacimiento to be expensive if the City does it on its own.
Alternative approaches to the Nacimiento Reservoir currently
available to the City are summarized below:
• Approach the County to develop 3000 AF of the
Nacimiento Reservoir Project as a permanent water
resource for the City.
• Approach the County to develop the Nacimiento
Reservoir Project in conjunction with other local
agencies that may also be interested in
development in the near-term future.
►►H�i�►►��IlNlll�lli�u'ui�����U city of San IDIS OBISpo
COUNCIL AGENDA REPORT
• Negotiate a separate independent agreement with
Monterey County to expand Nacimiento Reservoir.
• Do not pursue developing the Nacimiento Reservoir
at this time but keep it as one of the City's
potential long term water resources.
The City has identified that an additional safe annual yield of
6,540 acre feet is necessary to meet the needs of the community
based on the current general plan. In order to meet this
requirement the City will need to bring on line a number of new
water resource projects. Nacimiento Reservoir has always been
one of the City's long term water resource options and is now the
only large scale project available to the City. Using Nacimiento
water is consistent with the Council 's policy of having multi-
source water resources.
There also exists a possibility of the enlargement of
Nacimiento Dam. The enlargement could add 3 , 300 - 4, 000 af. at
$730 - $1130 per of development cost (per SLOC March 1986 cost) .
This could be an alternative for the City in the event that the
County would not provide the City with an allotment from their
existing allocation. This alternative would require that the
City negotiate directly with Monterey County for additional
rights.
In addition, the current reservoir storage has about 18
months of supply until the City may be in the same position that
it was in November 1990; limited reservoir supplies and potential
for the continuation of the drought. That would require us to
again have to decide that the only option left would be to
develop a desalination facility. Since it is estimated to take
three and half years to develop the Nacimiento Reservoir it is
necessary that we begin immediately. At this time, the City
should pursue the development of the Nacimiento Project as
quickly as possible.
a -I
o�na�rNl�lllllll�l►jIIUI�I city of San Luis OBISpo
COUNCILAGENDA REPORT
--------------------APPENDIX------------------------------------
----------------------------------------------------------------
SOURCE INFORMATION
1. ) Engineering-Science "City of San Luis Obispo Water Supply
Study", April 1977.
2. ) Dept of Water Resources study "San Luis Obispo
County Master Water Plan Update", March 1986. (SLOCA)
3. ) Mtg. with SLO County engineering staff.
4. ) Mtg. with SLO County environmental coordinator.
5. ) Co. of SIA Engr. Dept. "Facts about the Nacimiento Water
Supply Project, Measure IN"' Nov. 5, 1974.
6. ) SLO Co. Flood Control and Water Conservation District,
"Report on Feasibility of Utilization of Water from Nacimiento
River within SLO County. " Vol. I, II, and III April 1965.
7. ) Engineering letter from Bookman-Edmonston Engineering,
Inc. dated March 11, 1980 to San Luis Obispo Co. , subject
"Estimate of Cost for Nacimiento Water Supply" .
/ a -
M 0 N T E R EY ,° C 0 U N T Y
SAN L U I S ( O B I S P 0 C O U N T Y
�iJ SAN \ '
MIGUEL \ I
I NACIMIENTO O p `�
PUMPING PLANT
NACIMiMO
Is 1 L_t
RESERVOIR 1...—I
7 O : N E
I
J
PASO ( r
R08LE5 ,I
NACIMIENTO- r� Q
WHALE ROCK
CONDUIT ' r..—_.J T W r J J
J,CCN i 1,
CAMBRIA �•�\�} '
�'•• , �'dL" 0.)TEMPLETON I
Aa CRrc
O ATASCADERO
1
4 WHALE ROCK •l I
RESERVOIR
Cl 1 Q GARDEN FARMS
\ I
,n \ .SANTA MARGARITA
Q li ( SAUNAS
�
MORRO RESERVOIR
� ` ` �•••��
BAYyrs L r�+
7,�
0 SAN LUIS\ ��� 1
EXISTING OBISPO ` I'^-' 7
WHALE ROCK Or "`•..
CONDUIT
9 SCALE IN MILES V
,y I O I x 3 + s
ALTERNATE NO. 1
L E O E N 0
RECONNAISSANCE REPORT
PROPOSED CONDUITS
EIISTING CONOIRTS on .
I
PROPOSED PUMPING PLANTS
PROPOSED RES[IIYOIRS NACIMIENTO .
CWTINO RESERVOIRS INCLUDED IN PLAN WATER DIVERSION
ESISTING RESERVOIRS NOT INCLUDED IN PLAN
ATTACHMENT 1
M , CR c •ra° C O T
S SAN l U l i 0.'B I S P 0C0UNT T
°
SAN
MIGUEL
c L o
NACIMIENTO
\`-, —PUMPING PLANT
AND AFTEItBAY y
\.°b of as t•° NKIYICNTO
RESCRVOIR
SAN SIMEON
�a•/ PASO
J ROBLEL
o*
�•,•
cAMBwA •�` .�� �"� NAMIENTO-
f•1_ aF + SANCILUIS OBISPO
t
CONDUIT
"�i •• TEYPL[TON
fir• t•tt. ° .
S "
\�ATASCADERO
�� ew
CATUCOS
_ O J SANTA MARGARITA '�•,
WHALE ROCK a+'� PUMPING PLANT
RESERVOIR O GAq DEN FARMS
c=
° SANTA MARGARITA
a
SAUNAS
4 CUCSTA RESERVOIR
YORRO BAT WATER '••'\
TUNNEL
t
P •0 c°tt' / 1
.p BATTIOOD SAN LUIS \
PARK OBISPO O zm a��.,••Y_
E' .000/
••4 1
AVILA �} +� L L N ^ ��
9 a+�
y
SHELL BCKN r
°
PISYO BEACH O O.�r
GROVER CITY O / ARROYO GRANDE
OCCANO ')
7 H R E E.
NIPOYO
1_ O
/�
•°•at .. .wt, .00
I a I L . • t
ALTERNATE NO. 2
L It t 1 ° 0
RECONNAISSANCE REPORT
.AA.Auo •...... ��,/ On
♦P� +IMOf[P A/ttwOwt
I,N,I°I Attl+T,ue +if I° Mft,,
NACIMIENTO
tsnH+rMU bI PCloS[0 W +Y
W +
WATER DIVERSION
ATTACHMENT 2 .
NAC IMIENTO RESERVOIR WATER DIVERSION PROJECT
Alternative No. 1
Pipelines: assumptions - 18" dia. steel, 24.4 miles, $16,104,000
$125 per foot based on consultant
estimates of $110-125 per foot
(pipe cost at factory = $65/ft.)
Pump Station: from 1977 Engineering Science Report (ES),the $850,000
cost was $450,000, based on the ENA Construction
Cost Index: 1977 = 3161.75 and 1991 = 5930.24,
therefore the cost was increased by 1.88 based on
the ratio of these values.
SUBTOTAL $16,954,000
Environmental Impact Report and Permitting: based on the cost $200,000
of the desalination EIR and permitting which
was $252,000.
Engineering, Legal, and Administration (30%)*: $5,086,200
Contingencies (20%)*: $3,390,000
* Based on values used for the desalination project
TOTAL $25,631,000
ATTACHMENT- 3
NACIMIENTO RESERVOIR WATER DIVERSION PROJECT
Alternative No. 2
Pipelines: assumptions - 18" dia. steel, 33 miles, $219780,000
$125 per foot based on consultant
estimates of$110-125 per foot
(pipe cost at factory = $65/ft.)
Pump Station: from 1977 Engineering Science Report (ES), the $1,700,000
cost was $450,000, based on the ENR Construction
Cost Index: 1977 = 3161.75 and 1991 = 5930.241
therefore the cost was increased by 1.88 based on
the ratio of these values. This alternative requires
two pump stations.
Afterbay: from ES report the cost was $500,000 which was $940,000
increased by 1.88 as noted above.
Pressure Reduction Station: from ES report the cost was $55,000 $100,000
which was increased by 1.88.
SUBTOTAL $24,520,000
Environmental Impact Report and Permitting: based on the cost $200,000
of the desalination EIR and permitting which
was $252,000.
Engineering, Legal, and Administration (30%)*: $7,356,000
Contingencies (20%)*: $4,904,000
* Based on values used for the desalination project
TOTAL $36,9803000
ATTACHMENT 4
sHINOW 9*"�loi
O
a N
o:
_ _(1) O �11
LUo Cc
_ o>. 0 y v, w W
CA J m U H
Z Q
co 0
2 LL Z Z
ty rz p F- LLJ
o: v
Lui
z
r O
ss}:
J I:
: > 41 I. Q W
LLI _ n<: S
W CL
T{.
rj
I s.
W - o'< w0 J
_ � �
W Qto
ktU
p y
fry. 0 0 V• r
•214,-
Cl 4 'KLL
_
_ m
# r N
O �L
d FJ- t
a . �R Q Q
+� ATTA/^LA■C1JT e
MEETINGAGENDA
DATE NREM /ACZ
April 16, 1991
Mr. David Blakely, Chair
San Luis Obispo County Board of Supervisors
County Government Center F
San Luis Obispo, CA 93408
Dear Chairman Blakely:
The City of San Luis Obispo is presently pursuing permanent
alternative water supply sources. The City has reviewed a number
of alternative water resource projects. We believe that
Nacimiento Reservoir offers an effective local water resource
that should be developed. On April 16, 1991, the San Luis Obispo
City Council directed staff to pursue development of a San Luis
Obispo County Nacimiento Project.
Since the City potentially would need an additional water supply
within the next three-to-four years if the drought were to
continue, the City would like to pursue one of two alternatives
with the County. The first would be to participate with the
County and other agencies in a water diversion project from
Nacimiento for the benefit of all agencies. The second
alternative would be for the County to provide a portion of their
existing 17,500 AF allotment to the City. The City could then
develop a project to deliver this entitlement to the City in the
most feasible manner.
The City requests that initial discussions commence concerning
these two, or possibly other alternatives that could provide
Nacimiento water to the City of San Luis Obispo. The purpose of
this discussion would be to outline alternatives whereby the City
and any other agencies with an interest in near-term permanent
water could commence in developing a delivery project.
By this letter the City of San Luis Obispo is making a formal
request for the County to initiate the planning, design, water
and cost allocation of the Nacimiento Lake Water Project. Please
let us know at your earliest convenience your suggestions for how
the County and the City should proceed on this matter of mutual
concern.
COPHSTO:
Sincerely, ❑•D=Ws Amon L�X11 M
rd'
CAO FQV.DIR
CAO 0 FM QEF
RON DUNIN ;: EC F
eI sw du 0 Pouac t
Mayor MGMT.TEM 11RXI DR
AP��RLL11"``1 A 1991 ��D�
CITY CLERK
''AN LUIS OBISPO,CA