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Watershed Planning
Perspectives from an Outsider
Alan Miller, P.E.
Administrator
Hayden Lake Irrigation District
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Idaho Perspectives
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Rathdrum Prairie Comprehensive Aquifer Management Plan
• Sponsor: Idaho Water Resource Board
• Purpose: Provide reliable source of water projecting 50 years.
• Process: established Advisory Committee– Plan drafted over 1 year period– Currently open for public comment– Future Adoption and Implementation
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RP CAMP Findings
• Idaho – – Stable water supply for 50 year planning horizon– Anticipate stable water quality
• There are existing pockets of Arsenic
• Washington –– Current issues regarding timing and location – Study to appropriate water from northern reaches of
the aquifer
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RP CAMP Unknowns• Climate
– Is this aquifer system a storage type or flow through type? How would climate change affect the aquifer system? Projections call for wetter warmer winters, earlier runoff and reduced summer precipitation.
• Forest Practices– Removal of vegetative cover may move the
hydrograph to earlier runoff and reduced soil storage.
• Lake Coeur d’Alene– Change in the lake from aerobic to anaerobic could
release metals from the lake bottom sediments
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Washington Perspectives
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Aquifer Planning in Washington
• Washington Planning– Watershed Planning Act (RCW 90.82)
• Water Resource Inventory Area (WIRA)– WIRA 55/57 Middle Spokane River completed 2005
• Identify Future Water Needs• Determine if Sufficient Water Exists• Identify Management Strategies to Achieve Needs
• WIRA 55/57 – Currently in the implementation stage
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The Region Wide Approach
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Compare and Contrast
• Planning in both states recognizes– Need for adequate water supplies– Change in historical use
– Agriculture to Suburban / Urban Residential Use
• Planning differs in each state– Idaho is ground water focus
• Planning is top down but local based
– Washington is Spokane River focus • Planning is bottom Up
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Human Dimension• Why Plan?
– To avoid something
• Differences in planning and focus – Requires understanding of others perspective
• Political– Washington tends to follow perspective found
west of the Cascades– Idaho tends to follow perspective found in the
dryer southern portion
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Human Dimension• How do we begin managing the aquifer
system on a cooperative region wide basis? – we recognize the resource as a shared
resource not an owned resource as western water law would imply
– An approach that is interdependent, not independent
– Our challenges ahead will be people based, not water based.
• Not due to growth, but due to attitudes and approach
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The Other Reason to Plan
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Thank you