Central and West Coast Basin Water Rights Calculator
Walnut Park Mutual: Administrative Year (AY): 2024-25
Groundwater Rights AY 2024-25
Walnut Park Mutual | Central Basin | Alpha No. 5610
All values in acre-feetAnnual Rights
Total Rights Next Year
2673.35
2673.35
Total Rights
Storage (Start AY)
1,077.91
1,077.91
Withdrawn (AY)
0.00 a.f.
0.00 a.f.
Historical LeasesAll values in acre-feet
| Date | To | From | Flex/No Flex | Amount | Start | End |
|---|---|---|---|---|---|---|
May 12, 2022 | Walnut Park Mutual Water Company | Tract 180 Mutual Water Company | Lease With Flex | 150.00 | July 01, 2022 | June 30, 2026 |
September 12, 2018 | Walnut Park Mutual Water Company | Tract 180 Mutual Water Company | Lease With Flex | 250.00 | July 01, 2018 | June 30, 2022 |
January 10, 2014 | Walnut Park Mutual Water Company | Tract 180 Mutual Water Company | Lease With Flex | 400.00 | July 01, 2013 | June 30, 2018 |
November 13, 2012 | Walnut Park Mutual Water Company | Central Basin Municipal Water District | Lease With Flex | 4.00 | July 01, 2012 | June 30, 2018 |
November 13, 2012 | Walnut Park Mutual Water Company | Los Angeles, City of Dept of Water and Power | Lease With Flex | 46.00 | July 01, 2012 | June 30, 2018 |
May 22, 2014 | Tract 349 Mutual Water Company | Walnut Park Mutual Water Company | Lease With Flex | -75.00 | July 01, 2013 | June 30, 2014 |
April 14, 2014 | Tract 349 Mutual Water Company | Walnut Park Mutual Water Company | Lease With Flex | -120.00 | July 01, 2014 | June 30, 2015 |
January 22, 2014 | Tract 349 Mutual Water Company | Walnut Park Mutual Water Company | Lease With Flex | -100.00 | July 01, 2013 | June 30, 2014 |
Historical Sales All values in acre-feet
| Date | To | From | Type | Amount |
|---|---|---|---|---|
June 18, 2018 | Walnut Park Mutual Water Company | S&M Mellano 1036 PACIFIC LLC | Annual Water Right | 4.33 |
June 14, 2018 | Walnut Park Mutual Water Company | Mellano, G et al | Annual Water Right | 8.67 |
June 18, 2018 | Walnut Park Mutual Water Company | S&M Mellano 1036 PACIFIC LLC | One-Year Carryover | 6.67 |
June 14, 2018 | Walnut Park Mutual Water Company | Mellano, G et al | One-Year Carryover | 13.33 |
Storage All values in acre-feet
| Date | Type | Amount |
|---|---|---|
April 01, 2016 | Storage | 497.00 |
June 01, 2018 | Storage | 7.50 |
June 01, 2018 | Storage | 363.10 |
June 01, 2019 | Storage | 210.31 |
Wells All values in acre-feet
List of wells active in current Adminstrative Year
2024-2025 Leases
Groundwater leases are temporary assignments of rights to other parties to produce groundwater in the Central and West Coast Basins. Two different types of leases are commonly used: Standard Leases and Leases with flex
For more information please visit our Lease Reports page.
For more information please visit our Lease Reports page.
| To/From | Type | Date | Amount |
|---|---|---|---|
| From: Tract 180 Mutual Water Company | Flex | 2022-05-12 | 150.00 |
2025-2026 Leases
Groundwater leases are temporary assignments of rights to other parties to produce groundwater in the Central and West Coast Basins. Two different types of leases are commonly used: Standard Leases and Leases with flex
For more information please visit our Lease Reports page.
For more information please visit our Lease Reports page.
| To/From | Type | Date | Amount |
|---|---|---|---|
| From: Tract 180 Mutual Water Company | Flex | 2022-05-12 | 150.00 |
2024-2025 Carryover
One-Year Carryover(OYC)
One-Year Carryover are unused pumping rights carried over from the previous year. In the Central Basin, rights holders are allowed to carryover unused rights up to 60% of their APA. In the West Coast Basin the amount is 100% of their Adjudicated Rights. The total amount of One-Year Carryover will be reduced if a party elects to do carryover conversion during the year.
Drought Carryover (DCO, DCO'77, DCO'91)
This type of carryover is only possible during years in which the Water Replenishment District declares a Water Emergency. Once accumulated, drought carryover does not expire and remains with a pumper until it is used or sold.
Read More >>
One-Year Carryover are unused pumping rights carried over from the previous year. In the Central Basin, rights holders are allowed to carryover unused rights up to 60% of their APA. In the West Coast Basin the amount is 100% of their Adjudicated Rights. The total amount of One-Year Carryover will be reduced if a party elects to do carryover conversion during the year.
Drought Carryover (DCO, DCO'77, DCO'91)
This type of carryover is only possible during years in which the Water Replenishment District declares a Water Emergency. Once accumulated, drought carryover does not expire and remains with a pumper until it is used or sold.
Read More >>
| Type | Amount |
|---|---|
| One-Year Carryover (OYC) | 231.80 |
| Drought Carryover '91 | 204.64 |
| Drought Carryover '77 | 0.00 |
2024-2025 Water in Storage
Under certain circumstances, rights holders are allowed to convert one-year carryover(OYC) into stored water. Please refer to our Storage section for more information.
| Account | Amount |
|---|---|
| Individual Storage Account Capacity | 504.50 |
| Community Storage Account Capacity | 1,513.50 |
| Total Put Into Storage | 1,077.91 |
| Withdrawn From Storage | -0.00 |
| Total Individual Storage | 504.50 |
| Total Community Storage | 573.41 |
| Total Storage | 1,077.91 |
2024-2025 Sales
| To/From | Type | Date | Amount |
|---|
Unused Rights
Unused rights are rights owned in the current AY but were not pumped and not carried over to the next AY. In general, unused rights are not effected by carryover conversion unless a large amount OYC is converted and the lower limits of a pumpers' one-year carryover limit are increased by the amount of the Annual Pumping Right (in the Central Basin, the minimum carryover limit is 20 acre-feet or 20% of APA+Leases with Flex, whichever is greater). Usually, Unused rights can only be reduced by pumping, sales or leasing.
Non-Consumptive Rights
Unused rights are rights owned in the current AY but were not pumped and not carried over to the next AY. In general, unused rights are not effected by carryover conversion unless a large amount OYC is converted and the lower limits of a pumpers' one-year carryover limit are increased by the amount of the Annual Pumping Right (in the Central Basin, the minimum carryover limit is 20 acre-feet or 20% of APA+Leases with Flex, whichever is greater). Usually, Unused rights can only be reduced by pumping, sales or leasing.
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Converting Carryover to Storage
If a party has one-year carryover (OYC), they may choose to convert all or part of that carryover to storage. Parties who own water rights (an annual pumping allocation in the Central Basin or an annual right in the West Coast basin) can transfer one-year carryover into their individual storage account. If the individual storage account is full, they may use their community storage if space is available. Drought carryover (DCO) is not eligible for conversion. Please see the Storage section for more information.
| Storage Accounts for Walnut Park Mutual Water Company | Amount |
|---|---|
| Individual Storage Account Capacity | 504.50 |
| Community Storage Account Capacity | 1,513.50 |
| Total Put Into Storage | 1,077.91 |
| Withdrawn From Storage | -0.00 |
| Total Individual Storage | 504.50 |
| Total Community Storage | 1,234.00 |
| Total Storage | 1,738.50 |
Production to Date
If a party has one-year carryover (OYC), they may choose to convert all or part of that carryover to storage. Parties who own water rights (an annual pumping allocation in the Central Basin or an annual right in the West Coast basin) can transfer one-year carryover into their individual storage account. If the individual storage account is full, they may use their community storage if space is available. Drought carryover (DCO) is not eligible for conversion. Please see the Storage section for more information.
| Production | Amount |
|---|---|
| Total Production | 626.62 |
| Storage Withdraws | -0.00 |
| Net Production (Used to calculate next year's OYC) | 626.62 |