HomeMy WebLinkAbout1.15 Legal Water Supply Report
January 31, 2023
Garfield County Community Development Department
108 8th Street, Suite 401
Glenwood Springs, CO 81601
RE: Water Supply for Spring Valley Ranch PUD –PUD Amendment Application
(our file # 1725A)
Dear Garfield County Planning Staff:
Our law firm provides water counsel to Storied Development LLC (“Storied
Development”). Storied Development is under contract to purchase the property
known as the Spring Valley Ranch located outside of Glenwood Springs, CO, and
comprised of approximately 5,900 acres between four parcels (Garfield County
Parcel Nos. 218716100169, 218720100168, 218726200168, 218733100152)
(“Property”). The Property is owned by Spring Valley Holdings, LLC (“SVH”).
Storied Development, in cooperation with SVH, seeks to amend and revise the
current Spring Valley Ranch Development PUD approvals (SVH and predecessors
are referred to as “Developer” in this letter). This letter is for the purpose of
detailing the legal water supply available to meet the demands of the revised PUD
plan. A report on the physical supply available to the revised PUD plan will be
provided by Roaring Fork Engineering in a separate document.
Spring Valley Ranch PUD Water Supply
I. Summary
This letter summarizes the current legal water supply available for the Spring Valley
Ranch PUD, and demonstrates this water supply is adequate to serve the revised
PUD plan. Water for snowmaking is the one use that conservatively is not covered
by the existing decreed water supply.1 To the extent snowmaking use is not
covered, this letter addresses the plan to supplement the legal water supply in that
regard.
The overall water supply for the development will be supplied from surface water
diversions under senior decreed irrigation water rights out of Landis Creek;
existing and proposed wells and springs; and storage structures, including Hopkins
Reservoir, located on the Property.
1 Snowmaking is a use that arguably fits within the decreed definitions for commercial and recreation. However, to
be conservative and without waiving any rights in this regard, Storied Development will assume snowmaking
requires its own separate legal supply.
Garfield County Planning Staff
January 31, 2023
Page 2
Twenty years of various detailed engineering investigations confirm that surface and groundwater
resources are physically available for the development, and that well diversions will be sustainable,
and not have a long-term negative impact on the Spring Valley aquifer.
In sum, the legal water supply for the development is based on Water Court decrees approving
water rights, changes of water rights, and two plans for augmentation. These existing decrees
provide a legally reliable water supply for the residential development, commercial uses, golf
course, and related potable and agricultural open space irrigation, as shown in the amended PUD
plan. Augmentation water necessary to offset any out-of-priority development depletions will be
provided pursuant to contracts with the Basalt Water Conservancy District. Irrigation of the golf
course and agricultural open space will occur under senior water rights; and will be supplemented
by groundwater as necessary.
II. Surface Irrigation Water Supply:
SVH has senior, surface irrigation water rights decreed to irrigate up to 764 acres within the Spring
Valley Ranch Property. These water rights include irrigation diversions from Landis Creek and
springs, and storage rights in the Hopkins Reservoir.
A. Landis Creek Irrigation Diversions
SVH owns the most senior water rights on Landis Creek (the “Landis Creek Senior Irrigation
Rights”). The Landis Creek Senior Irrigation Rights have priority dates between 1882 and 1885
and have never been out of priority. These rights– the Kendall and Stricklett Ditch, Landis Ditch
Nos. 1 and 2, O.K. Ditch, Forker and Gibson Ditch, and Frank Chapman Ditch – were decreed in
Civil Action 306 for a total of 12.0 c.f.s. and have historically been used to irrigate up to 300 acres.
(Exhibit A; bit.ly/3vSoAZ5). The diversion points for the Landis Creek Senior Irrigation Rights
were transferred to a single consolidated diversion point on Landis Creek in Case No. 81CW193
(the “Landis Creek APOD”) (Exhibit B; bit.ly/3ID9jCV).
SVH’s water right in the Hopkins Ditch also diverts from the Landis Creek APOD. The Hopkins
Ditch right is decreed for 3.0 c.f.s. in Case No. W-3298-A with a 1976 priority date for the
irrigation of 150 acres. (Exhibit C; bit.ly/3iqFpqP).
B. Hopkins Reservoir
The Hopkins Reservoir was originally constructed in 1910 and is filled with water from feeder
ditches, melting snow, and drainage flowing or seeping directly into the reservoir. The Hopkins
Reservoir was decreed in Civil Action 1419 for 119.57 a.f., with the right to fill and refill for
storage and for the irrigation of 300 acres. (Exhibit D; bit.ly/3iyZf3b). The Office of the State
Engineer inspected the Hopkins Dam on June 21, 2021, and the State rated the Hopkins Dam to
have a safe, satisfactory overall condition. (Exhibit E; bit.ly/3Qrx4Qr).
Garfield County Planning Staff
January 31, 2023
Page 3
C. Springs
SVH owns a total of 0.1648 c.f.s. in three springs located within the Spring Valley Ranch PUD.
The Hopkins Spring No. 1, Hopkins Spring No. 2, B-R Hopkins Spring were decreed in Case W-
3121, Case W-3122, and Case W-2395, respectively, for domestic purposes and to irrigate roughly
14 acres. (Exhibit F; bit.ly/3QvaAxJ).
The above surface water rights will be utilized as primary and supplemental sources of supply
within the overall development water supply, as discussed in Section III below.
III. Integrated Development Water Supply
The domestic water supply decreed to serve the currently approved Spring Valley Ranch PUD is
comprised of various water rights that operate as part of an integrated supply system to legally
divert water through a private, largely well-based water system. The integrated water supply
system will have two primary components. The first is a central potable water supply system to
serve in-house domestic needs and a limited amount of irrigation for lawns, gardens, and
community areas. The second is a non-potable system to irrigate the golf courses, open space areas,
driving range, clubhouse areas, and agricultural land.
A. Domestic Water Supply
The potable domestic water supply for the Spring Valley Ranch PUD plan, as revised, will be
provided by the Developer’s interest in the following wells (together, the “SVR Wells”) and
springs:
Hopkins Spring Nos. 1 and 2
Spring Valley Well No. 1
Spring Valley Ranch Well Nos. 2 and 3
SVH Well Nos. 5 through 10
ASR Well Nos. 13 through 16
SVR Well Nos. 17 through 36
The SVR Wells were originally decreed in Case No. 98CW256, but the rights were automatically
canceled by the Court when SVH’s predecessor elected not to file for “diligence” on the water
rights. (Exhibit G; bit.ly/3vTqDfs). SVH has filed an application in Case No. 22CW3009 to
adjudicate new conditional well rights with a 2022 priority date to replace the water rights for the
above structures. (Exhibit H; bit.ly/3GvmHq3).
i. Alternate Points of Diversions
The wells and springs listed above were established in Case Nos. 84CW212 and 98CW255 as
alternate points of diversion (“APOD”) for the Basalt Conduit. (Exhibit I; bit.ly/3iwiwlV). These
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January 31, 2023
Page 4
structures operate first under their own decreed priorities; then as alternate points of diversion
under the Basalt Conduit’s 1957 priority for up to 6.0 c.f.s. pursuant to the decrees issued in Case
Nos. 84CW212 and 98CW255, and when neither of these priorities are in priority, under the
augmentation plans decreed in Case No. 87CW155 and 98CW254.
The 1957 priority for the wells and springs listed above is important since that renders the wells
and springs equal to or senior to other wells in the Spring Valley aquifer in the event there was
ever a “call” on the local groundwater aquifer. Therefore, the wells and springs are only junior to
downstream water rights on the Roaring Fork River and/or the Colorado River; and they are
protected against curtailment by the augmentation plans discussed below.
B. Augmentation Plans
i. First Augmentation Plan – Case No. 87CW155
The augmentation plan decreed in Case No. 87CW155 (the “first augmentation plan”), includes
the Hopkins Spring Nos. 1 and 2, Spring Valley Well No. 1, SVR Well Nos. 2 and 3, and SVH
Well Nos. 5-10 in the Basalt Water Conservancy District’s (“BWCD” or “District”) batch
augmentation plan. (Exhibit J; bit.ly/3Zpgy7y). The augmentation plan relies on Ruedi Reservoir
and Green Mountain Reservoir to supply augmentation replacement water to cover the PUD
development depletions. In order to be included in the plan, the Developer obtained BWCD
Allotment Contract Nos. 43 and 328 that allot a total of 420 a.f. of augmentation water.
The Case No. 87CW155 augmentation plan contemplated Spring Valley Ranch PUD total annual
water requirements of 1371 a.f. diversions; with a total annual consumptive use of 453.6 a.f. These
amounts were based on development density of up to 2,642 residential units (813 a.f.), 90 acres of
domestic irrigation (188 a.f.), 150 acres of golf course irrigation (317 a.f.), and reservoir
evaporation (53 a.f.). The plan also contemplated Wells 1-3 and 5-10 having a maximum direct
flow demand of 6.0 c.f.s., cumulative.
ii. Supplemental Augmentation Plan – Case No. 98CW254
The Developer obtained a second plan for augmentation in Case No. 98CW254 (“supplemental
augmentation plan”) in order to add new wells and other structures; and to increase the augmented
irrigation amount. (Exhibit K; bit.ly/3vU3ucG). The 98CW254 augmentation plan supplements
and works in conjunction with the first augmentation plan to cover the total development demands,
as identified in the supplemental augmentation plan. The 98CW254 case added the ASR Well Nos.
13-16, SVR Well Nos. 17-36, ASR Ditch No. 1 and treated effluent under the Spring Valley
Sanitation District Pipeline water right decreed in Case No. 00CW21, as augmented structures and
sources of supply for the planned PUD development.
Notably, the supplemental augmentation plan increased the irrigation beyond 150 acres allowed in
the first plan for augmentation; but decreased the residential component. Specifically, the plan
Garfield County Planning Staff
January 31, 2023
Page 5
allows for an additional 270 acres of irrigation for golf courses, open space and agricultural areas
for a total maximum of 420 acres to be served by the various junior well and spring structures
identified in the plan.
The supplemental augmentation plan is based on an annual water requirement of 1457 a.f.
of diversions, a total annual consumptive use of 974 a.f., and in a dry year, and an overall
augmentation requirement of 420 a.f. These calculations assume water service for up to 695
single-family residential equivalent units (“EQRs”) mostly treated through the Spring Valley
Sanitation District, 420 acres of irrigation, and 24 acres of pond surface evaporation.
Together, the augmentation plans are designed and approved to serve a Spring Valley Ranch PUD
development density of 577 residential units (including affordable housing units and cooperative
ownership cabins), two 18-hole golf courses, and some limited commercial development. The
augmented irrigation component consists of 90 acres associated with the residential and
commercial development, and 420 acres of golf courses, open space, and agricultural areas.
iii. Augmentation Plan Modifications and Reconfigurations
Importantly, so long as the Spring Valley Ranch PUD consumptive use does not exceed 974
a.f. annually, the 98CW254 decree allows for modifications and reconfigurations of the
number of EQRs and amounts of irrigated acreage allowed under the augmentation plan
without the need to modify the existing water court decrees. If re-mix is desired, the decree
outlines the methods to be used to calculate the development’s overall water demand, consumptive
use, and augmentation. For example, for purposes of changing the mix of uses the following factors
are used to calculate an estimated demand and consumptive use:
1 Residential EQR = 350 gallons per day 2 for in-house use
5% consumptive use of in-house water for EQRs connected to a central wastewater
treatment system
15% consumptive use of in-house water for EQRs utilizing non-evaporative
individual sewage disposal systems
Irrigation consumptive use = 1.79 a.f. per acre
Free water surface evaporation = 2.05 a.f. per acre
1 Commercial EQR = expected in-house water usage of commercial facility
equated to 350 gallons per day.
iv. BWCD Water Allotment Contracts
The augmentation plans are based on two key contracts with the Basalt Water Conservancy District
(“BWCD” or “District”) under BWCD Contract No. 43 and BWCD Contract No. 328 that provide
rights to BWCD water to augment water usage on the property. Contract No. 43 allots 6.0 c.f.s.
from District’s direct flow water rights under the Basalt Conduit water right and 180 a.f. of water
2 Each EQR 3.5 persons each using 100 gallons per day.
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January 31, 2023
Page 6
stored in Ruedi and Green Mountain Reservoirs and controlled by the District. (Exhibit L;
bit.ly/3ir9feP). Contract No. 328 allots 6.0 c.f.s. from the District’s direct flow water rights and
240 a.f. of water stored in Ruedi and Green Mountain Reservoirs and controlled by the District for
the contemplated uses of industrial and commercial use. (Exhibit M; bit.ly/3GTpk6l).
v. Treated Effluent Water Right – Spring Valley Sanitation District Pipeline
By the Pre-Inclusion and Wastewater Treatment Plant Development Agreement, the Developer is
entitled to use treated effluent from the Spring Valley Sanitation District Pipeline as a source of
supplemental irrigation in the amount that corresponds to the amount of wastewater Spring Valley
Ranch PUD generates. (Exhibit N; bit.ly/3CCAcD4). The Spring Valley Sanitation District
Pipeline is an open ditch and gravity flow pipeline that collects and diverts treated wastewater
effluent from the wastewater plant for recycled use. The Spring Valley Sanitation District Pipeline
was decreed in Case No. 00CW21 in the amount of 3.48 c.f.s., conditional, for beneficial use within
the Spring Valley Sanitation District service area. (Exhibit O; bit.ly/3XimtcL).
The use of treated effluent for irrigation will reduce the demand for groundwater and can
supplement aquifer recharge. Currently, the PUD does not generate any wastewater and therefore
does not have treated effluent to use to supplement the Development’s irrigation. Once wastewater
is produced in adequate amounts and it is feasible to reuse the treated effluent, the Developer
intends to install the necessary infrastructure in order to put the treated effluent to beneficial use
in conjunction with the decreed augmentation plans.
C. Case 22CW3009 – Junior Well, Surface and Storage Rights
As mentioned above, SVH filed Case No. 22CW3009 to adjudicate new conditional well and
surface water rights for the Spring Valley Ranch PUD structures that were previously granted
conditional water rights but were canceled by the water court for failure to file diligence. These
structures are covered under the 98CW254 augmentation plan.
i. Junior Well and Surface Rights
In Case 22CW3009, SVH requests conditional water rights to divert up to a cumulative 1,457 a.f.
annually from the structures listed below:
Spring Valley Well No. 1
Spring Valley Ranch Well Nos. 2 and 3
SVH Well Nos. 5 through 10
ASR Well Nos. 13 through 16
SVR Well Nos. 17 through 36
ASR Ditch No.1
The application requests to use water diverted with these water rights for the following uses:
municipal, domestic, livestock, commercial, recreation, aesthetic, fish and wildlife, irrigation (up
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January 31, 2023
Page 7
to 510 acres) of lawns and gardens, shrubs, trees, and golf course and open space property, and
fire protection uses associated with the Spring Valley Ranch PUD water supply system.
ii. Junior Storage Rights
Case No. 22CW3009 requests conditional water rights to construct three new reservoirs and
expand the existing Hopkins Reservoir to store an additional 205.43 a.f. for use within the
development. The Developer intends to use water stored in ASR Reservoir Nos. 1-3 and the
Hopkins Reservoir First Enlargement for immediate application, storage and subsequent
application, exchange, replacement of depletions, and augmentation purposes.
Existing Legal Water Supply Compared to Amended PUD Plan
The purpose of this section is to demonstrate that the existing decreed legal and physical water
supply is adequate to meet the water requirements for the amended PUD plan, except for
snowmaking. With respect to snowmaking, Storied Development will obtain a further,
independent legal water supply for this use, as described below.
IV. Water requirements for Revised PUD Plan
Storied Development seeks an amendment to the previously approved Spring Valley Ranch PUD
to modify components of the planned PUD including the type and number of development units,
irrigation requirements, and to add snowmaking as a use of its non-potable water system. The
water requirements for the revised PUD plan are as follows, below, and as shown on the attached
Tables from Colorado River Engineering. (Exhibit P; bit.ly/3RmUUxh).
A. Residential domestic use: 577 residential units. The in-house domestic demand is 280 acre-
feet per year, with a corresponding 14 acre-feet per year of consumptive use.3
B. Residential site irrigation: approximately 33.8 acres of lawn and garden irrigation in and
around the home sites. This equates to 89.8 acre-feet/year of demand and 71.8 acre-feet of
consumption, based on 80% application efficiency.
C. Commercial: 38.0 acre-feet of estimated potable demand for clubhouse, tennis facilities,
golf course facilities, health club facilities, maintenance facilities and similar. Commercial
consumption will be 5.7 acre-feet per year.
D. Golf Course Irrigation: 124 acres of irrigation for an 18-hole golf course and associated
short course and practice facilities. The golf course designers estimate a demand of 329.4
3 Residential consumptive use is based on 100% of the demand served by Spring Valley Sanitation District (SVSD).
Based on industry standards, SVSD treatment is 5% consumptive. Storied Development reserves the ability to serve
a portion of its development through onsite wastewater treatment systems (which are 15% consumptive) as plans
develop. Such a change would only slightly increase the indoor potable consumption.
Garfield County Planning Staff
January 31, 2023
Page 8
acre-feet from April through October; and 263.5 acre-feet of consumption (based on 80%
application efficiency).
E. Open Space Irrigation: 100 acres.4 This equates to 265.7 acre-feet/year, assuming an
application rate of 2.657 acre-feet/acre 5 and 212.6 acre-feet of consumptive use (assuming
80% application efficiency).
F. Ponds and Hopkins Reservoir: 24 surface acres resulting in 77.6 feet/year of consumptive
evaporation.6
G. Snowmaking: 140 acre-feet of demand for the months of November, December, and
January; with 42 acre-feet/year of consumption. Developer does not currently have specific
water rights for snowmaking. Storied Development will seek an additional or amended
BWCD allotment contract to cover any depletions associated with snowmaking; and
amended well permits to allow for a well and storage based snowmaking system to serve a
ski hill included in the revised PUD. Because the legal water supply for the snowmaking
will be independent, it is not included in the water supply comparison below.
In sum, the total water demand for the revised PUD plan is 1,221 acre-feet/year, with total
consumptive use of 688 acre-feet.
V. Amended Demands and Consumption are within the Approved Limits
Again, the water court approved augmentation plans allow for an annual water requirement of
1457 a.f. of diversions, and a total annual consumptive use of 974 a.f., in a dry year.
The total demand for the amended PUD is lower than the total demands authorized by the decreed
plans for augmentation, as shown below:
Plans for
Augmentation Amended PUD
Potable Water System Demands
In-house domestic use 273 280
Domestic irrigation 200 90
Commercial 0 7 38
Total Potable Water System Demand 473 408
4 Similar to the 2002 and 2007 PUD plan designs, the Storied Development revised PUD plan includes
approximately 220 acres of agricultural land irrigation (mainly in the valley bottom), when water is available, which
will be in most years. This ag land irrigation will be served under existing senior surface water rights from Landis
Creek and is not included in the potable and non-potable water supply demand calculations for the PUD.
5 This rate is more conservative (i.e., higher) than the rate used in the 98CW254 augmentation plan assumptions.
6 Based on the 2.05 acre feet/acre assumption used in the 98CW254 augmentation plan.
7 Previous aug plans contemplated limited commercial use but did not separately quantify such use.
Garfield County Planning Staff
January 31, 2023
Page 9
Non-Potable Water System Demands
Total Non-Domestic Irrigation 935 595
Golf course Incl. 329.4
All other non-domestic irrigation 935 265.5
Pond evaporation 49 78
Snowmaking 0 140
Total Non-Potable Water System Demand 984 813
Total Demands 1457 1221
The total consumption for the amended PUD is lower than the total consumption authorized by
the decreed plans for augmentation, as shown below:
Plans for
Augmentation Amended PUD
Potable Water System Consumptive Use
In-house domestic use 17 14
Domestic irrigation 160 72
Commercial 0 6
Total Potable Water System Depletions 177 92
Non-Potable Water System Consumptive Use
Total Irrigation 748 476
Golf course Incl. 263.5
All other non-domestic irrigation 748 212.6
Pond evaporation 49 78
Snowmaking 0 42
Total Non-Potable Water System Depletions 797 596
Total Consumption 974 688
VI. Conclusion
The Developer’s water rights, court-decreed augmentation plans and change cases, well permits,
and water allotment contracts provide an adequate legal water supply for Storied Development’s
amended PUD. Storied Development’s contemplated water demands and consumptive uses will
not exceed the Developer’s already acquired water rights and water resources available for the
Spring Valley Ranch PUD. To the extent snowmaking use is not covered under existing decreed
augmentation plans, Storied Development will obtain additional BWCD contract, storage and well
permit approvals.
Garfield County Planning Staff
January 31, 2023
Page 10
We hope this information is helpful. Please contact our office if you have any questions.
Very truly yours,
Patrick | Miller | Noto
A Professional Corporation
By:_______________________ Scott C. Miller
miller@waterlaw.com
Lisa A. Claxton
claxton@waterlaw.com
SCM/lac
Enclosures
Indoor Lawn & Commercial Total Golf Course Open Space Surface Water Snowmaking Total
Garden Irrigation Irrigation Evaporation
Month (1)(2)(3)(4)(5)(6)(7)(8)(9)
Jan 23.8 ‐3.2 27.0 ‐‐‐46.7 46.7
Feb 21.5 ‐2.9 24.4 ‐‐0.5 ‐0.5
Mar 23.8 ‐3.2 27.0 ‐‐3.6 ‐3.6
Apr 23.0 6.5 3.1 32.6 24.0 19.3 7.7 ‐51.0
May 23.8 12.0 3.2 39.0 44.1 35.6 10.6 ‐90.3
Jun 23.0 18.9 3.1 45.0 69.3 55.9 13.2 ‐138.4
Jul 23.8 19.4 3.2 46.4 71.3 57.5 13.6 ‐142.4
Aug 23.8 16.0 3.2 43.0 58.6 47.2 11.1 ‐116.9
Sep 23.0 10.7 3.1 36.8 39.1 31.5 9.4 ‐80.0
Oct 23.8 6.3 3.2 33.3 23.1 18.6 6.4 ‐48.1
Nov 23.0 ‐3.1 26.1 ‐‐1.7 46.7 48.4
Dec 23.8 ‐3.2 27.0 ‐‐‐46.7 46.7
Total 280.0 89.8 38.0 407.8 329.4 265.7 77.6 140.0 812.7
Notes:
(1) 577 dwelling units; 2,500 residents (with 7.5% safety factor) each requiring 100 gallons per day;
(2) 33.8 acres of lawn and garden irrigation; CU determined using Blaney Criddle assessment for Bluegrass with
Pochop adjustments under 1990‐2020 observed climate conditions; 80% irrigation efficiency
(3)Estimated demand for clubhouse, tennis facilities, golf course facilities, health club facilities,
and maintenance facilities
(4) Sum of Columns (1) ‐ (3)
(5) 124 acres of golf course irrigation; CU determined using Blaney Criddle assessment for Bluegrass with
Pochop adjustments under 1990‐2020 observed climate conditions; 80% irrigation efficiency
(6)100 acres of open space irrigation; CU determined using Blaney Criddle assessment for Bluegrass with
Pochop adjustments under 1990‐2020 observed climate conditions; 80% irrigation efficiency
(7) 24 acres of free water surface area; determined following SB 120 guidelines for water bodies above
6,500 feet in elevation; gross annual evaporation was based on NOAA NWS Atlas Lines, analyzed in GIS;
effective precipitation was not considered; icing was considered using 1990‐2020 observed climate conditions
(8)Desired snowmaking supply of 46.7 acft Nov ‐ Jan
(9) Sum of Columns (5) ‐ (8)
Total: 1,221 acft
Table 1
Proposed Development Water Demand
Spring Valley Ranch
Potable Non‐Potable
1/27/2023
Colorado River Engineering Project # 1273
Indoor Lawn & Commercial Total Golf Course Open Space Surface Water Snowmaking Total
Garden Irrigation Irrigation Evaporation
Month (1) (2) (3)(4)(5) (6) (7) (8)(9)
Jan 1.2 ‐0.5 1.7 ‐‐‐14.0 14.0
Feb 1.1 ‐0.4 1.5 ‐‐0.5 ‐0.5
Mar 1.2 ‐0.5 1.7 ‐‐3.6 ‐3.6
Apr 1.2 5.2 0.5 6.8 19.2 15.4 7.7 ‐42.3
May 1.2 9.6 0.5 11.3 35.3 28.5 10.6 ‐74.4
Jun 1.2 15.1 0.5 16.7 55.4 44.7 13.2 ‐113.4
Jul 1.2 15.5 0.5 17.2 57.0 46.0 13.6 ‐116.6
Aug 1.2 12.8 0.5 14.5 46.9 37.8 11.1 ‐95.7
Sep 1.2 8.6 0.5 10.2 31.3 25.2 9.4 ‐65.9
Oct 1.2 5.0 0.5 6.7 18.5 14.9 6.4 ‐39.8
Nov 1.2 ‐0.5 1.6 ‐‐1.7 14.0 15.7
Dec 1.2 ‐0.5 1.7 ‐‐‐14.0 14.0
Total 14.0 71.8 5.7 91.5 263.5 212.6 77.6 42.0 595.7
Notes:
(1) Assume 100% of indoor demands are treated by Spring Valley Water and Sanitation District (5% efficient)
(2) 80% irrigation efficiency
(3) 15% commercial efficiency
(4) Sum of Columns (1) ‐ (3)
(5) 80% irrigation efficiency
(6) 80% irrigation efficiency
(7) Surface water evaporation is 100% consumptive
(8)Snowmaking assumed to be 30% consumptive
(9) Sum of Columns (5) ‐ (8)
Total: 688 acft
Table 2
Proposed Development Consumptive Water Demand
Spring Valley Ranch
Potable Non‐Potable
1/27/2023
Colorado River Engineering Project # 1273
(sq ft)acres
Cabin 3.5 2000 0 0 0.00
Estate 4 2500 146 584 8.38
Ranch 4 2500 250 1000 14.35
Mountain 4.5 4000 106 477 9.73
Community Housing (MF)3.5 500 32 112 0.37
Community Housing (SF)3.5 1000 43 150.5 0.99
Total 577 2,323.5 33.82
With 7.5% Safety Factor:2,500.0
Table 3
Proposed Lots
Spring Valley Ranch
Home Size People
Irrigated Lawn
Area No of Lots Total People Total Irrigation
1/27/2023
Colorado River Engineering Project # 1273
In-House Irrigation Total In-House Irrigation Total
Demand Demand Demand Depletion Depletion Depletion
(AF)(AF)(AF)(AF)(AF)(AF)
January 3.23 3.23 0.48 0.48
February 2.92 2.92 0.44 0.44
March 3.23 3.23 0.48 0.48
April 3.12 3.12 0.47 0.47
May 3.23 3.23 0.48 0.48
June 3.12 3.12 0.47 0.47
July 3.23 3.23 0.48 0.48
August 3.23 3.23 0.48 0.48
September 3.12 3.12 0.47 0.47
October 3.23 3.23 0.48 0.48
November 3.12 3.12 0.47 0.47
December 3.23 3.23 0.48 0.48
TOTAL 38.00 38.00 5.70 5.70
Planning Area Building SF gal/day acft/day
"A" - Ranch HQ
"B" - Public Access Area
General Store 3,000 3,000 sf 0.1 gpd/sf 300 0.0009
Sales 1,000 1,000 sf 0.1 gpd/sf 100 0.0003
Info Ctr.1,000 1,000 sf 0.1 gpd/sf 100 0.0003
Comfort Station @ Sports Court 500 20 people 5 gpd/person 100 0.0003
"C" - Community Housing
Community Housing Amenity 7,500 200 people 25 gpd/person 5,000 0.0153
"D" - Middlebench
Golf Clubhouse 8,000
General Store NA
Restaurant 75 seats 50 gpd/seat 3,750 0.0115
Bar/Lounge 35 seats 30 gpd/seat 1,050 0.0032
Employees 20 people 20 gpd/person 400 0.0012
Locker Room 100 people 25 gpd/person 2,500 0.0077
Firestation (4-bay)5,000
FTE 3 people 100 gpd/person 300 0.0009
Equipment Washing 100 gpd 1 100 0.0003
Family Barn (pool, events, fitness)24,000 100 people 25 gpd/person 2,500 0.0077
Starter Pavilion 1,800 100 people 5 gpd/person 500 0.0015
Lodging Units (10)8,250 20 people 50 gpd/person 1,000 0.0031
Sports Court Comfort Station 500 200 people 5 gpd/person 1,000 0.0031
GOLF - Comfort Stations/Snack Shack (2)2,000 125 people 5 gpd/person 625 0.0019
Golf Maintenance 12,000
Employees 10 people 20 gpd/person 200 0.0006
Equipment Washing 200 gpd 1 200 0.0006
OTHER - Entry Gate 750
Metro District Offices/Community Maintenance 15,000 15,000 sf 0.1 gpd/sf 1,500 0.0046
Employees 10 people 20 gpd/person 200 0.0006
"E" - West Ridge
Community Gathering Amenity 6,500 150 people 25 gpd/person 3,750 0.0115
"F" - Southeast Slope
"G" - Aspen Ridge
Mountain Community Amenity 5,000 200 people 25 gpd/person 5,000 0.0153
"H" - North Mountain
Restaurant (Fine Dining) 70-90 seats 4,000 75 seats 50 gpd/seats 3,750 0.0115
TOTAL:105,800 33,925 0.1041
Estimated Water Demand
Unit 1 Description Unit 2 Description
Table 4
Commercial Water Demands
1/27/2023
Colorado River Engineering Project # 1273