HomeMy WebLinkAboutMONTAVA - PHASE G & IRRIGATION POND - BDR210013 - SUBMITTAL DOCUMENTS - ROUND 2 - STORMWATER-RELATED DOCUMENTSmemorandum
To: Max Moss, Montava
From: Rachel Kullman, P.E.
Date: March 3th, 2022
Re: Accounting Concepts for Montava Non-potable Irrigation Ponds
In this memorandum I include an overview of the various accounting concepts that will be
required for non-potable irrigation ponds at Montava, including the West Pond, East Pond and
the Farm Pond.
Pond Inflows
• Sources of potential inflow for West Pond only:
o WSSC shares (potentially from both Montava and Fort Collins)
o Groundwater from existing Montava wells (including one Portner well)
o Groundwater from existing Fort Collins wells (including one Portner well)
o Groundwater from proposed new Montava well
o The pond should be constructed so as to prevent long-term retention of
stormwater inflows.
o The planned clay liner will prevent groundwater seepage inflows
• Sources of potential inflow for East Pond only:
o NPIC shares (potentially from both Montava and other entities)
o WSSC shares (potentially from both Montava and other entities)
o Groundwater from existing Montava wells
o Groundwater from proposed new Montava well
o The pond should be constructed so as to prevent long-term retention of
stormwater inflows.
o The planned clay liner will prevent groundwater seepage inflows
• Sources of potential inflow for Farm Pond only:
o NPIC shares
o WSSC shares
o Groundwater from existing Montava wells
o The pond should be constructed so as to prevent long-term retention of
stormwater inflows.
o The planned clay liner will prevent groundwater seepage inflows
• All sources of inflow should be measured at least on a daily basis before delivery to the
pond(s).
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Phone : 505-690-1432 I Email : rachel@kullmanwater.com I Web : www.kullmanwater.com
Address: P.O. Box 5464 Santa Fe, NM 87502
o Each well will need to be measured independently as water is pumped from the
aquifer (it may not be necessary to measure each well separately as delivered
into the pond(s), if piped from the wellhead).
o WSSC and NPIC deliveries to the pond(s) (or property if piped to pond(s)) will
need to be measured. It may not be necessary to separately measure deliveries
by entity in the case of the West and East Pond, if simultaneous deliveries can
be prorated.
Pond Outflows
• Sources of potential outflow for West Pond only:
o Fort Collins’ irrigation uses under the various water sources:
WSSC shares, groundwater from Montava’s existing groundwater wells or
Fort Collins’ existing groundwater well.
o Montava’s irrigation uses under the various water sources:
WSSC shares, groundwater from Montava’s existing groundwater wells
o Groundwater from the new Montava well will be used to fill the pond initially and
to offset evaporation losses during the non-irrigation season. Groundwater from
the new well will not be released from the pond.
o Evaporation losses
Evaporation losses will be calculated using unit daily evaporation rates
and the amount of surface water exposed in the pond on a daily basis.
The surface area will be determined from a staff gage placed in the pond
and an associated stage-area curve/chart.
Evaporation losses will be calculated during the irrigation season and
non-irrigation season on a daily basis. Irrigation season losses will be
deducted from the various water source accounts held in the pond, likely
on a pro-rata basis. Non-irrigation season losses will be deducted from
the stored groundwater pumped from Montava’s new well.
o The proposed clay liner will prevent groundwater seepage outflows
• Sources of potential outflow for East Pond only:
o Montava’s irrigation uses (and other entity uses, if applicable) under the various
water sources:
NPIC shares, WSSC shares, groundwater from Montava’s existing
groundwater wells
o Groundwater from the new Montava well will be used to fill the pond initially and
to offset evaporation losses during the non-irrigation season. Groundwater from
the new well will not be released from the pond.
o Evaporation losses
Evaporation losses will be calculated using unit daily evaporation rates
and the amount of surface water exposed in the pond on a daily basis.
The surface area will be determined from a staff gage placed in the pond
and an associated stage-area curve/chart.
Evaporation losses will be calculated during the irrigation season and
non-irrigation season on a daily basis. Irrigation season losses will be
deducted from the various water source accounts held in the pond, likely
3
Phone : 505-690-1432 I Email : rachel@kullmanwater.com I Web : www.kullmanwater.com
Address: P.O. Box 5464 Santa Fe, NM 87502
on a pro-rata basis. Non-irrigation season losses will be deducted from
the stored groundwater pumped from Montava’s new well.
o The proposed clay liner will prevent groundwater seepage outflows
• Sources of potential outflow for Farm Pond only:
o Montava’s irrigation uses under the various water sources:
NPIC shares, WSSC shares, groundwater from Montava’s existing
groundwater wells
o Evaporation losses
Evaporation losses will be calculated using unit daily evaporation rates
and the amount of surface water exposed in the pond on a daily basis.
The surface area will be determined from a staff gage placed in the pond
and an associated stage-area curve/chart.
Evaporation losses will be calculated during the irrigation season and
non-irrigation season on a daily basis. Irrigation season losses will be
deducted from the various water source accounts held in the pond, likely
on a pro-rata basis. Non-irrigation season losses will not occur because
the Farm Pond is anticipated to be empty during the non-irrigation
season.
o The proposed clay liner will prevent groundwater seepage outflows
• All sources of outflow should be measured at least on a daily basis as released from the
pond(s).
o At a minimum, Fort Collins’ total irrigation uses/outflows and Montava’s total
irrigation uses/outflows should be measured in the case of the West Pond.
o At a minimum, any other entity’s total irrigation uses/outflows (if applicable) and
Montava’s total irrigation uses/outflows should be measured in the case of the
East Pond.
o At a minimum, Montava’s total irrigation uses/outflows should be measured in the
case of the Farm Pond.
o Use of water from Montava’s existing groundwater wells (and Fort Collins’ well
for the West Pond) are restricted to particular locations by permit and decree and
it will be necessary to ensure compliance with these limitations to the extent such
sources are used on the irrigated areas. It may be necessary to meter
groundwater distribution at strategic locations in the non-potable system in order
to quantify and account for these limitations.
o NPIC shares cannot be used for irrigation west of Giddings Road. When
developing the accounting for the East Pond and Farm Pond, this limitation
should be tracked.
o For the West Pond, once irrigated areas for each entity are determined/finalized,
it may be necessary to include additional measurement points as water is
distributed for irrigation in order to accurately account for each entity’s share of
the groundwater and the WSSC shares.
Storage Accounts
4
Phone : 505-690-1432 I Email : rachel@kullmanwater.com I Web : www.kullmanwater.com
Address: P.O. Box 5464 Santa Fe, NM 87502
• For the West Pond, it will be necessary to account for the amount of water stored in the
pond on a daily basis by entity (i.e. Montava vs. Fort Collins), for all sources of water (i.e.
“colors”).
• For the East Pond, it will be necessary to account for the amount of water stored in the
pond on a daily basis by entity (i.e. Montava vs. other entity, if applicable), for all sources
of water (i.e. “colors”).
• For the Farm Pond, it will be necessary to account for the amount of water stored in the
pond on a daily basis for all sources of water (i.e. “colors”).
• In order to quantify the amount of water stored for each entity/color account, it will be
necessary to parse out inflows and outflows into the appropriate accounts. The
methodology used to complete this parsing of sources will be based on various criteria
and limitations associated with both the sources and uses of water (some of which are
described in the next section).
Limitations on Use of Water
• WSSC and NPIC shares:
o Share deliveries should not be stored in the pond(s) more than 72 hours because
the shares will not be decreed for storage purposes in the ponds.
o Share deliveries should not be made on lands that are not within the historical
service area of the ditch system, unless specific approval is granted otherwise.
• Montava’s and Fort Collins’ existing groundwater wells:
o Groundwater from these wells should not be stored in the pond(s) more than 72
hours because the groundwater is not decreed for storage purposes in the
pond(s).
o Each groundwater well will have limitations or restrictions by decree and permit
that will need to be considered and monitored, including:
Decreed/permitted flow rate
Decreed/permitted place of use
Decreed/permitted annual volumetric limit
Augmented annual volumetric limit (if different from decree/permit)
o As previously mentioned, it will be necessary to track/account for groundwater
use from these wells to the point of application at the various irrigation sites in
order to demonstrate compliance. Additional measurement may be necessary in
order to comply.
• Montava’s new groundwater wells:
o Use of groundwater from these well(s) will allow Montava to keep the pond full
during the non-irrigation season.
o The limitation on use from these well(s) will be permitted uses and volumetric
amounts determined under the new augmentation plan decree or substitute
water supply plan.
5
Phone : 505-690-1432 I Email : rachel@kullmanwater.com I Web : www.kullmanwater.com
Address: P.O. Box 5464 Santa Fe, NM 87502
Figures 1 through 3 include schematics of the West Pond, East Pond and Farm Pond,
respectively.
Table 1 includes water rights information associated with Montava’s existing groundwater wells,
as well as Fort Collins’ Portner Well. Figure 4 shows the decreed location for the wells listed in
Table 1.
Figure 1. Montava West Pond Accounting Schematic
Key:
Measurement Point
Inflow / Outflow
Note:
Schematic is provided for conceptual purposes only.
Not to scale.
CLAY LINER = NO
LOSSES
WSSC SHARES
> Montava
>Fort Collins
EXISTING WELLS
> Montava:Wells #s 16-19
> Montava:1 Portner Well
> Fort Collins: 1 Portner Well
> No new augmentation requirements
NEW WELL
> Montava to augment
MONTAVA'S STORAGE ACCOUNTS
> WSSC shares
> Groundwater from Wells #s: 16-19, Portner 1-2
> Groundwater from New Well
WEST IRRIGATION POND
USES BY FORT COLLINS
> WSSC Shares
>Well water (from Montava & Fort Collins wells)
USES BY MONTAVA
> WSSC Shares
>Well water
EVAPORATION
FORT COLLINS' STORAGE ACCOUNTS
> WSSC shares
> Groundwater from Wells #s: 16-19, Portner 1-2
STAFF GAGE TO DETERMINE
SURFACE WATER AREA
Figure 2. Montava East Pond Accounting Schematic
Key:
Measurement Point
Inflow / Outflow
Note:
Schematic is provided for conceptual purposes only.
Not to scale.
CLAY LINER = NO
LOSSES
NPIC SHARES
> Montava
> Other entity
WSSC SHARES
> Montava
> Other entity
EXISTING WELLS
> Montava:Wells #s 16-19
> Other entity groundwater wells, if
applicable
> No new augmentation requirements
NEW WELL
> Montava to augment
MONTAVA'S STORAGE ACCOUNTS
> NPIC shares
> WSSC shares
> Groundwater from Wells #s: 16-19
> Groundwater from New Well
EAST IRRIGATION POND
USES BY MONTAVA
> NPIC Shares
> WSSC Shares
>Well water
EVAPORATION STAFF GAGE TO DETERMINE
SURFACE WATER AREA
OTHER ENTITY STORAGE ACCOUNT (if applicable)
> WSSC shares
> NPIC shares
> Groundwater
USES BY OTHER ENTITY (if applicable)
> WSSC Shares
> NPIC shares
>Well water
Figure 3. Montava Farm Pond Accounting Schematic
Key:
Measurement Point
Inflow / Outflow
Note:
Schematic is provided for conceptual purposes only.
Not to scale.
CLAY LINER = NO
LOSSES
NPIC SHARES
> Montava
WSSC SHARES
> Montava
EXISTING WELLS
> Montava:Wells #s 16-19
> No new augmentation requirements
MONTAVA'S STORAGE ACCOUNTS
> NPIC shares
> WSSC shares
> Groundwater from Wells #s: 16-19
FARM IRRIGATION POND
USES BY MONTAVA
> NPIC Shares
> WSSC Shares
>Well water
EVAPORATION STAFF GAGE TO DETERMINE
SURFACE WATER AREA
1617
87
4 5
6
321
9
1110
1819
32 33 34
05 04
31
0306
2829 2730
Sources: Esri, HERE, Garmin, USGS, Intermap, INCREMENT P, NRCan, Esri Japan, METI, Esri
China (Hong Kong), Esri Korea, Esri (Thailand), NGCC, (c) OpenStreetMap contributors, and the
GIS User C ommunity, Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus
DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community
-
0 0.25 0.5
Miles
FI GU R E 4 . DE CR EE D W E L L L OC AT I O N S
Marc h 2 022
Legend
Decreed Well Location
Section Lines
Montava
Table 1. Montava Well Information
Well Name
Portner Well
No. 1
Portner Well
No. 2
Kluver PS 1:
Well No. 1
Kluver PS 1:
Well No. 2
Fitzsimons
Well No. 1
Fitzsimons
Well No. 2
Bachmayr Well
No. 4
Bachmayr Well
No. 5
Kluver PS: Well
No. 2
Kluver PS 5:
Well No. 1
Kluver PS 5:
Well No. 2 Kluver Well
Albertson Well
No. 10
Albertson Well
No. 11
Albertson Well
No. 12
Map Identification No.7 8 19 18 17 16 10 11 9 1 2 3 6 5 4
T-R-S T8N-R68W-32 T8N-R68W-32 T8N-R68W-32 T8N-R68W-32 T8N-R68W-32 T8N-R68W-32 T8N-R68W-33 T8N-R68W-33 T8N-R68W-33 T7N-R68W-4 T7N-R68W-4 T7N-R68W-4 T7N-R68W-4 T7N-R68W-4 T7N-R68W-4
Quarter Section SW SW SE SE NE NE NW NW SW NW NW NW NE NE NE
Permit No.1-0494 2-0495 19196-R 19196-SR 11370-R 11372-R 328-RD-R 329-RD-R 19197-R 19200R 19200S 1-20143R 28278-F 18056-RR 18053-RF
WDID 0306121 0306863 0305474 0305853 0305972 0306100 0306430 0306433 0305303 0305526 0306199 0306677 0306221 0305001 0305002
Case No.W2896 W2896 CA11217 CA11217 CA11217 CA11217 CA11217 CA11217 CA11217 CA11217 CA11217 W699
W1621 /
85CW184 W1621 W1621
Augmentation Status Poudre Plan Poudre Plan
Coffin: non-
tributary
Coffin: non-
tributary
Coffin: non-
tributary
Coffin: non-
tributary
Coffin: non-
tributary
Coffin: non-
tributary
Coffin: non-
tributary
Coffin: non-
tributary
Coffin: non-
tributary Poudre Plan Poudre Plan Poudre Plan Poudre Plan
Decreed Acreage 90 acres NA
Decreed Place of Use SW33 S4
Decreed Flow Rate 2.11 cfs 1.89 cfs 700 gpm 800 gpm 2 cfs 2 cfs 1.5 cfs 1.5 cfs 1000 gpm 450 gpm 800 gpm 495 gpm 680 gpm 2.3 cfs 2.84 cfs
NE4
155 acres 160 acres 160 acres 320 acres 160 acres 106 acres
SW32 SE32 NE32 N1/2 of 33 NW4