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Long Term Water Assets - Volume of Water Assets (Details) | Dec. 31, 2017 acre ft | Dec. 31, 2016 acre ft | Dec. 31, 2009 acre ft | Dec. 31, 2008 acre ft
--- | --- | --- | --- | ---
Water held for future use |  |  |  |
Purchased water contracts | 10,137 | 10,137 |  |
Long-term Water Assets, Intangible Water Contracts (Volume) | 80,617 | 64,823 |  |
Total water held for future use and purchased water contracts | 131,316 | 106,567 |  |
Transferable water |  |  |  |
Water held for future use |  |  |  |
AVEK water bank | 6,169 |  |  |
AVEK |  |  |  |
Water held for future use |  |  |  |
AVEK water bank | 13,033 | 13,033 | 6,393 | 8,393
Company water bank | 31,497 | 17,287 |  |
AVEK water for future delivery | 0 | 2,362 |  |
Transferable water | 6,169 | 9,062 |  |
Total water held for future use | 50,699 | 41,744 |  |
AVEK | Transferable water |  |  |  |
Water held for future use |  |  |  |
AVEK water bank | 1,452 |  |  |
Transferable water | 2,137 |  |  |
Transferable water factor | 1.5 |  |  |
Wheeler Ridge Maricopa Water Storage District |  |  |  |
Water held for future use |  |  |  |
Purchased water contracts | 15,547 | 15,547 |  |
Tejon-Castac Water District |  |  |  |
Water held for future use |  |  |  |
Total water held for future use | 49,184 | 33,390 |  |
Purchased water contracts | 5,749 | 5,749 |  |

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