March 14, 2019
Mayor Ryan Vinciguerra
322 W. Park St.
Marble, CO 81623
Re:

Preliminary Augmentation Plan

Mayor Vinciguerra:
This letter report summarizes our preliminary augmentation estimates and basic
augmentation plan considerations for the Town of Marble.
Project Description and Background
On November 20, 2018, the Marble Water Company received a notice from the Division
of Water Resources providing notice of out-of-priority depletions. The letter stated that in
the future, curtailment of diversions was a possibility and suggested that a plan for
augmentation be developed for replacement water.
This report provides a cursory overview of water rights available to the Town of Marble
and the basic requirements for a plan for augmentation for the relatively junior water rights
currently available to the Town of Marble. Refer to Figure 1 for the location of features
discussed herein.
A typical unit of measurement for municipal water use is the Equivalent Residential Unit,
or EQR. An EQR is the amount of water used by a single family household and typically
assumes 3.5 persons per residence. Irrigation of a limited amount of lawns is sometimes
included at the discretion of the water provider. Municipal water demands are typically
quantified in terms of EQRs. A sample EQR assessment schedule from the Town of
Carbondale Municipal Code is attached.
It is our understanding that the current water system has approximately 80 connections.
Approximately 0.7 acre-feet per month were attributed to indoor demands based on winter
time usage as shown in Table 1. This yields an average indoor demand of approximately
100 gallons per day per service connection. This is somewhat low but not unreasonable
considering the occupancy rate of Marble and the size of the residences. This usage rate
would equate to approximately 0.3 EQR per service connection.

 Water Rights
There are several water rights serving the Town of Marble water system.
Marble Pipeline and Water System
Legal Description (W-1848)
The westerly bank of Carbonate Creek at a point whence the Southeast Corner of
Section 26, Township 11 S., Range 88 West of the 6th P.M., bears South 20°21’ East
4832.1 feet.
This water right was originally decreed in Case No. W-1848 for 6 cfs of which 3 cfs
were originally made absolute. The appropriation date is 1907 but the adjudication
date is 1973.
Marble Water Company Well
Legal Description (79CW361)
Located at a point whence the Northeast Corner of Section 26, Township 11 S., Range
88 W. of the 6th P.M. bears North 32°50’ East a distance of 3108 feet.
The well was decreed as an alternate point of diversion to the Marble Pipeline and
Water System for 0.056 cfs (25 gpm) of the remaining conditional 3.0 cfs. This 0.056
cfs was subsequently made absolute in 86CW67. The Town of Marble was the
Applicant in the cases involving the Marble Water Company Well.
Marble Water Company Well No. 2
Legal Description (94CW117)
In the Northwest ¼ of the Southeast ¼ of Section 26, Township 11 South, Range 88
West of the 6th P.M. at a point approximately 2,565 feet from the South Section Line
and 1,835 feet from the East Section line of said Section 26.
The well was also decreed as an alternate point of diversion to the Marble Pipeline
and Water System for 0.1 cfs (45 gpm) of the remaining conditional 3.0 cfs. 0.056 cfs
of the 0.1 cfs was subsequently made absolute in 17CW3056. The Marble Water
Company, not the Town, was the Applicant in the cases involving the Marble Water
Company Well No. 2.
A total of 0.156 cfs (70 gpm) of the original Marble Pipeline and Water System has been
changed to the wells. Of this 70 gpm 50 gpm has been made absolute. 2.88 cfs remains
conditional of the original Marble Pipeline and Water System water right.
Demands and Depletions
Monthly diversions for the 2018 water year were reviewed as presented in Table 1. For
the water year 2018 a total of approximately 18 acre-feet were diverted by the wells.
Indoor demands were estimated based on the winter time usage rate. It was also
assumed that 50% of the summer time seasonal increase was attributable to domestic
Zancanella & Associates, Inc. 
March 14, 2019 

 

Page 2 

 usage. Outdoor demands were then estimated based on the remaining balance of the
summer time seasonal increase.
The estimated outside seasonal demands between April and October are shown in Table
1. A 10% depletion rate was applied to indoor demands as the Town is served by OWTS
systems and ISDS systems for which a 10% depletion rate is commonly accepted. An
80% depletion rate was applied to outdoor demands which is representative of sprinkler
irrigation. The resulting depletion curve estimate based on an assumed 80 connections
and the estimated mix of indoor and outdoor uses is presented in Table 1.
Water Use Projection and Augmentation Estimate
Table 2 applies the depletion curve developed in Table 1 to a 2x increase in demand, or
160 service connections. A conservative July – October call scenario was assumed for
the senior downstream irrigation rights on the Crystal River. Table 2 considers delayed
pumping effects to the stream from the wells and also considers lagged return flows. The
resulting out-of-priority depletions estimate was 6.64 acre-feet as shown in Column (4) of
Table 3. The estimated Crystal River augmentation reservoir size after considering
evaporation losses is presented in Column (6) of Table 3. Based on these assumptions
and methods we believe an on-site augmentation pond of approximately 11 acre feet is
appropriate for planning purposes.
In average years the controlling water right will be the Cameo Call and Colorado River
augmentation would be necessary. This could be accomplished with Colorado River
Water Conservation District (CRWCD) contract for approximately 6.65 acre-feet. Green
Mountain H.U.P. was considered for Colorado River augmentation based on a 1980
census population of 31 persons in Marble. The benefit of having a CRWCD contract is
that it can be used instead of the onsite augmentation pond in typical years.
The currently decreed diversion rate of 0.12 cfs at the wells is only slightly greater than
the projected peak monthly average demand shown in Table 2 during July. Additional
capacity will eventually need to be developed. We recommend applying for additional
wells as needed to meet demands. A well field water right conterminous with the Town
of Marble parcels located along the Crystal River for 1.0 cfs of the remaining 2.88 cfs
conditional to the Marble Pipeline and Water System would be sufficient.
The remainder of the conditional amounts decreed to the Marble Pipeline and Water
System could be decreed as an alternate point of diversion at or near the upstream
boundary of the same Town of Marble parcels. The point of diversion on the north bank
of the Crystal River would be used as a surface water intake to a reservoir to provide the
approximate 10 acre-feet of Crystal River augmentation. 10 acre-feet of capacity would
likely require a 3-4 acre reservoir, site. Depending on the depth of the reservoir. It is likely
that the reservoir would be relatively shallow considering the topography and depth to
groundwater in the area of the proposed well field. Site reconnaissance would need to
be conducted to gain a better grasp on potential locations for the reservoir. The area of
the Marble Mill would be a potential augmentation reservoir site. We have evaluated some
other potential sites like Beaver Lake owned by the Division of Parks and Wildlife, but

Zancanella & Associates, Inc. 
March 14, 2019 

 

Page 3 

 teaming with other agencies with competing concerns may be difficult to overcome. We
believe that they received a similar letter regarding the out-of-priority depletions resulting
from evaporation associated with Beaver Lake.
Very truly yours,
Zancanella & Associates, Inc.

Jared A. Walter, P.E.
 

Thomas A Zancanella, P.E.

Attachments
ec:

Kendall Burgemeister

z:\2018 jobs\18714 marble water\marble_engineering_report.docx

Zancanella & Associates, Inc. 
March 14, 2019 

 

Page 4 

 TABLE 1
Marble Water Company

Diversion/Depletion Summary
Winter Diversion - Monthly:
Winter Diversion - Daily:
Assume ~ 80 connections:

Inside

2018

0.7
0.02
95.80

ac-ft
cfs
gpd/connection

Outside

Diversion

Depletion
10%

Diversion

Total

Depletion
80.0%

Total
Depletion

cfs
0.01

ac-ft
0.57

ac-ft
0.57

ac-ft
0.06

ac-ft
0.00

ac-ft
0.00

ac-ft

cfs

ac-ft

November

0.57

0.01

0.06

Marble
Depletion
Curve
10.0%

December
January

0.01
0.01

0.70
0.80

0.70
0.80

0.07
0.08

0.00
0.00

0.00
0.00

0.70
0.80

0.01
0.01

0.07
0.08

10.0%
10.0%

February
March

0.01
0.01

0.70
0.76

0.70
0.76

0.07
0.08

0.00
0.00

0.00
0.00

0.70
0.76

0.01
0.01

0.07
0.08

10.0%
10.0%

April
May
June
July
August
September

0.01
0.03
0.05
0.05
0.04
0.03

0.78
1.72
2.71
3.02
2.48
2.06

0.74
1.22
1.71
1.87
1.60
1.38

0.07
0.12
0.17
0.19
0.16
0.14

0.04
0.50
1.01
1.15
0.88
0.68

0.03
0.40
0.81
0.92
0.70
0.54

0.78
1.72
2.71
3.02
2.48
2.06

0.01
0.03
0.05
0.05
0.04
0.03

0.11
0.52
0.98
1.10
0.86
0.68

13.5%
30.3%
36.0%
36.6%
34.8%
33.1%

October
Total

0.03

1.55
17.84

1.14
13.19

0.11
1.32

0.41
4.66

0.33
3.73

1.55
17.84

0.03

0.44
5.04

28.6%

Diversion

Marble Water Company
Summary of Diversions and Depletions
3.50

2018 Diversions
3.00

2018 Depletions
2.50

Acre-Feet

2.00

1.50

1.00

0.50

0.00
November December

January

February

March

April

May

June

July

August

September October

Month

Z:\2018 Jobs\18714 Marble Water\Water Demands, Depletions\
Marble_Diversions.xlsx

Zancanella & Associates, Inc.

By: JAW
March 11, 2019

 TABLE 2
Marble Augmentation Estimate
(1)

(2)

Days
Month

November
December
January
February
March
April
May
June
July
August
September
October
Annual

[no.]
30
31
31
28
31
30
31
30
31
31
30
31
365

(3)

(4)

(5)

(6)

Monthly Parameters
Mixed Use
Pumping
Deep
Depletion
Impact
Percolation
Curve
Factor
Return Flow
Impact Factor
[ft/acre]
[%]
[%]
10.0%
8.0%
8.3%
10.0%
6.2%
7.9%
10.0%
5.9%
7.8%
10.0%
5.6%
7.7%
10.0%
5.4%
7.6%
13.5%
5.3%
7.4%
30.3%
6.6%
7.7%
36.0%
9.7%
8.5%
36.6%
12.3%
9.2%
34.8%
12.7%
9.4%
33.1%
11.9%
9.4%
28.6%
10.5%
9.1%
100.0%
100.0%

(7)

Diversions Delayed Depletions
Total
Total Incurred
Pumped
To Stream

[ac-ft]
1.14
1.41
1.60
1.40
1.51
1.56
3.45
5.43
6.03
4.96
4.11
3.10
35.69

[ac-ft]
2.84
2.22
2.09
2.01
1.92
1.89
2.37
3.47
4.38
4.52
4.23
3.74
35.69

(8)

(9)

Return Flows
Total
Total
Accretion
To Stream
[ac-ft]
1.03
1.27
1.44
1.26
1.36
1.35
2.40
3.48
3.83
3.23
2.75
2.21
25.60

[ac-ft]
2.12
2.02
2.00
1.97
1.93
1.90
1.98
2.18
2.35
2.41
2.40
2.34
25.60

(10)

Depletions
Total

[ac-ft]
0.72
0.21
0.08
0.04
-0.01
-0.01
0.40
1.29
2.03
2.11
1.83
1.40
10.09

Description of Columns:
(1)
Months in water year order.
(2)
Days in each month.
(3)
Mixed use depletion curve from Table 1.
method with Pochop elevation adjustment, normal conditions at site.
(4)
Delayed impact factor for well pumping; calculated with Glover transient well depletion approach for dynamic equilibrium
T = 1,000 gpd/ft S = 0.05 Distance to Crystal River, D = 300 ft
(5)
Delayed impact factor for return flows occurring as deep percolation; calculated with transient parallel drain approach for dynamic equilibri
K = 25 gpd/ft2 S = 0.05 Distance from centroid of return flows to Crystal River, D = 1,100 ft
(6)
Equals 2x the amount from Table 1. Assumes an increase from 80 EQRs to 160 EQRs.
(7)
Equals Column (7) annual value x Column (5)
(8)
Equals Column (7) - Column (7) x Column (4)
(9)
Equals Column (9) annual value x Column (6)
(10)
Equals Column (8) - Column (10)

Z:\2018 Jobs\18714 Marble Water\Water Demands, Depletions\
Marble_Diversions.xlsx

Zancanella & Associates, Inc.

By: JAW
March 11, 2019

 Table 3
2018 Water Monthly Accounting Summary

Depletions
Month
(1)
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Total

Total

Call Days

(2)

(3)

0.72
0.21
0.08
0.04
‐0.01
‐0.01
0.40
1.29
2.03
2.11
1.83
1.40

0
0
0
0
0
0
0
0
31
31
30
15
107

10.09

(units = acre-feet)
Crystal River Augmentation
Out-ofAugmentation
Evap.
Priority
Pond Size
Depletions
(4)
(5)
(6)
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
2.03
2.11
1.83
0.68
6.65

1.13
1.17
0.95
0.80
4.05

Colorado River Augmentation
Out-ofCall Days
H.U.P.
Augmentation
Priority
Depletions
(7)
(8)
(9)
(10)
0
0
0
0
0
15
0
15
31
31
30
31
153

10.69

0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.65
2.03
2.11
1.83
1.40
8.01

0.16
0.05
0.02
0.01
0.00
0.00
0.09
0.30
0.47
0.48
0.42
0.32
2.31

0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.39
1.72
1.79
1.55
1.19
6.64

Column explanation:
(1)
Months in water year order.
(2)
Total depletions from Table 1 Column (10)
(3)
Assumed call scenario for the Crystal River
(4)
Equals Column (2) prorated for the call scenario presented in Column (3)
(5)
Estimated evaporation losses from and average reservoir surface area of 2.5 acres
(6)
Equals Column (4) + Column (5) Annual Values
(7)
Assumed call scenario for the Colorado River
(8)
Equals Column (2) prorated for the call scenario presented in Column (6)
(9)
Estimated Green Mtn. H.U.P. using 1980 Census Population of 31 persons.
(10)
Equals [Column (7) - Column (8)] + 10% transit losses

Z:\2018 Jobs\18714 Marble Water\Water Demands, Depletions\
Marble_Diversions.xlsx

Zancanella & Associates, Inc.

By: JAW
March 11, 2019

 Example EQR Schedule
(Taken from Sec. 13‐3‐20 Carbondale Municipal Code)

1

2
3
4

5
6

Nature of Facility to be Served
EQR
a. Single-family detached residence, not to exceed 1,500 square feet, 1 full
kitchen, 2 outside hose bibs and up to 2,500 square feet of irrigated lawn
1
and garden watered by sprinkler or drip irrigation.
b. Residences over 1,500 square feet will be charged an additional .03
EQR for each increment of 100 square feet over 1,500 square feet, or
0.03
fraction thereof, in building size. There shall not be an adjustment for
fractional increments of less than 100 square feet.
Each additional 100 square feet of irrigated lawn and garden by sprinkler or
0.02
drip irrigation.
Each additional 100 square feet of nonresidential irrigated landscape by
0.02
sprinkler or drip irrigation.
Multifamily residential units, including duplexes, apartments and condominiums:
a. Buffet or studio apartment or condo with 1 kitchen, up to 1,500 square
0.6
feet.
b. Up to and including two bedrooms with up to 1 1/2 baths and 1 kitchen,
0.8
up to 1,500 square feet.
c. Three bedrooms with up to 2 baths and 1 kitchen, up to 2,000 square
1
feet.
d. Each additional 100 square feet or fraction thereof in excess of the above
limits will be assessed 0.03 EQR. There shall not be an adjustment for
0.03
fractional increments of less than 100 square feet.
e. Each coin-operated washing machine up to 12 lbs. capacity.
0.35
f. Common area irrigation and amenities such as swimming pools, club houses and laundry
Each mobile home or mobile home space in a court with not more than
0.8
1,000 square feet of irrigated lawn and garden.
Transient rental units, hotels, motels or rental units within residences:
a. Manager's unit: uses single-family or multifamily classification as
0.4
applicable.
b. Each additional room without cooking or kitchen facilities.
0.5
c. Each additional room with cooking or kitchen facilities.
0.3
d. Washing machine.
0.2
e. 3/4" hose bib.
0.2

7

Dormitories (per each rental bed space) without laundry or kitchen facilities.

8

Recreational vehicle parks:
a. For each camping or vehicle space without sewer hook-up.
0.35
b. For each camping or vehicle space with sewer hook-up.
0.4
c. For common facilities, manager's unit and related facilities, see categories above (spaces
Bars and restaurants:
a. For businesses with less than 25 seats.
2
b. For each additional seat.
0.04
Service stations and gas stations:
a. Service stations per fuel nozzle.
0.4
b. Per garage spaces (per 1,000 sq. ft.).
0.3
c. Per food/retail/office sales (per 1,000 sq. ft.).
0.5

9

10

Page 1 of 3

0.1

 Example EQR Schedule
(Taken from Sec. 13‐3‐20 Carbondale Municipal Code)

11

12

13

14

15

16
17

Commercial retail stores with no processed water, no residences and no
eating facilities of up to 5,000 square feet, including 2 restrooms which
1
have a total of 2 lavatories and 2 toilets (1 each per restroom):
a. For each additional toilet or urinal with manual flush.
0.3
b. For each additional lavatory.
0.15
c. For each shower or bath or combination.
0.3
d. For each manually operated drinking fountain.
0.1
e. For each additional 1,000 square feet of floor space above 5,000 feet.
0.02
Commercial offices (such as banks, professional office space and other low
traffic occupations) with no processed water, no residences and no eating
1
facilities of up to 7,000 square feet, including 2 restrooms which have a total
of 2 lavatories and 2 toilets (1 each per restroom):
a. For each additional toilet or urinal with manual flush.
0.3
b. For each additional lavatory.
0.15
c. For each shower or bath or combination.
0.3
d. For each manually operated drinking fountain.
0.1
e. For each additional 1,000 square feet of floor space above 7,000 feet.
0.14
Industrial, including warehouses up to 8,000 square feet which include 2
restrooms which have a total of 2 lavatories and 2 toilets (1 each per
1
restroom):
a. For every 350 gallons/day of processed water with not more than 15%
1
consumptive use.
b. For each additional toilet or urinal with manual flush.
0.3
c. For each additional lavatory.
0.15
d. For each shower or bath or combination.
0.01
e. For each mop sink.
1
f. For each manually operated drinking fountain.
0.1
g. For each additional 1,000 square feet of floor space above 8,000 feet.
0.13
Schools, including principal's administrative office and school staff, but not including cafeteria,
a. Up to 25 students and staff.
1
b. For each additional student.
0.02
c. Cafeteria, gymnasium and athletic requirements determined on a case-bycase basis at the Town's sole discretion.
Swimming pools up to 25,000 gallon capacity:
a. Year-round operation.
1
b. Summer only (less than 6 months).
0.5
c. For each additional 1,000 gallons of capacity.
0.02
Fire protection sprinkler systems.
0
Irrigation by sprinkler or drip system:
a. Residential per 100 square feet.
0.02
b. Commercial per 100 square feet.
0.02

Page 2 of 3

 Example EQR Schedule
(Taken from Sec. 13‐3‐20 Carbondale Municipal Code)

18

19
20
21
22
23
24
25
26
27
28

Car washes: **
a. For each bay/rack where cars can be washed.
 i. Manual bay
 ii. Automatic bay
Barber shop/beauty salon per chair.
Theater (per 25 seats).
Grocery store per 1,000 sq. ft. floor space.
Church (per 25 seats).
Medical/dental per 1,000 sq. ft. floor space.
Greenhouse/nursery per 1,000 GPD.
Construction yard per 1,000 sq. ft. office space.
a. Construction yard wash equipment.
Nursing home/hospital.
Athletic club per 1,000 sq. ft.
Commercial Laundromats:
a. Each washing machine.

Page 3 of 3

3
15
0.4
0.6
0.3
0.4
1
1.2
1
0.7
2
0.5

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DATE:

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DRAWN BY: CHKD BY:

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Marble Water Co..

ZANCANELLA AND ASSOCIATES, INC.
ENGINEERING CONSULTANTS
POST OFFFICE BOX 1908 - 1011 GRAND AVENUE
GLENWOOD SPRINGS, COLORADO 81602 (970) 945-5700

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