Interstate Groundwater Agreements Utah Water Law Conference March 10, 2008
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Transcript of Interstate Groundwater Agreements Utah Water Law Conference March 10, 2008
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Interstate Groundwater AgreementsUtah Water Law Conference
March 10, 2008
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What is Sustainability?
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How do you measure recharge?
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What is the function of gw storage?
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NVUT
How do you divide it?
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Groundwater Flow in Soil
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• Recharge– Precipitation
– Runoff
– Return flow from irrigation
• Discharge
–Evapotranspiration
–Springs
–Underflow
–Wells
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What is reasonable?
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Safe Yield
• “Safe Yield” means the amount of groundwater that can be withdrawn from a groundwater basin over a period of time without exceeding the long-term recharge of the basin or unreasonably affecting the basin’s physical and chemical integrity. 73-5-15(1)(b)
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Areas of Concern
with shared
aquifers
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Utah/Nevada Water Right Negotiations
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Snake Valley Negotiations are NOT
• Sale or conveyance of Utah Water to Nevada
• Utah approval for SNWA to pump wells
• Taking Utah water rights for Nevada
• Trade of water in Snake Valley for consideration elsewhere
• A subversive effort by government to disenfranchise citizens
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Agreement (PL 108-424)
Prior to any transbasin diversion from ground-water basins located within both the state of Nevada and the State of Utah, the State of Nevada and the State of Utah shall reach an agreement regarding the division of water resources of those interstate ground-water flow system(s) from which water will be diverted and used by the project. The agreement shall allow for the maximum sustainable beneficial use of the water resources and protect existing water rights.
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Agreement Concepts
• Opportunity to plan and work together on a solution• Agreement Elements
– Geographical Extent– Define Water Right Protection– Development Future in Both States– Sustainability– Sensitive Species Issues
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Agreement Area Boundary
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Fish Springs27,000 af
Gandy Springs12,000 af Twin Springs
2000 af
Big Springs24,000 af
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Snake Valley Characteristics
Utah Nevada
Recharge 30% 70%
ET 70% 30%
Existing Rights 55,000 af 15,000 af
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Agreement Process
• Hydrology and water resource features
• Existing uses and water rights
• Division methodology
• Assuring sustainability
• Avoiding other unacceptable consequences
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In the end,there is only so much water.