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Mitigation credits, conserved-water projects and the HCP: what Bend learned about securing municipal groundwater
Summary
At the advisory meeting, OWRD staff described how the Deschutes mitigation program, conserved-water allocations and the Habitat Conservation Plan shape municipal access to groundwater: mitigation credits are scarce, the program sunsets in 2029, and winter release targets will increase reservoir constraints.
Oregon Water Resources Department staff told Bend's Water Advisory Group that mitigation credits and conserved-water programs are central to how cities can access additional groundwater, and that federal habitat protections and program sunsets are tightening operational flexibility.
Carolyn Suffet and Angela Reinhold outlined the basics: the Deschutes mitigation program allows retiring surface-water rights (often via purchases or transfers) to generate mitigation credits that can offset new groundwater use. Cities typically purchase permanent mitigation credits to support new groundwater rights because temporary credits are more commonly used in agriculture.
OWRD told the group that the mitigation program has a statutory or program cap the department identified in its materials (the presentation cited a 200 cfs cap on mitigation activity over time) and that the program is scheduled to sunset in 2029. Suffet said permanent mitigation credits are "very hard to come by right now," and city staff present said municipalities will likely need to secure credits for anticipated groundwater needs in the coming decades.
The department also described conserved-water and legal-enlargement projects historically used in the region. In much of central Oregon, conserved-water projects routed most or all saved conveyance losses to instream flows; locally, many publicly funded piping projects historically dedicated 100% of conserved water to instream restoration, producing measurable summer-flow gains in tributaries.
Federal habitat protections (the HCP) now impose additional winter flow targets intended to protect species such as the Oregon spotted frog and bull trout. Presenters described a sequence of Wickiup Reservoir winter-release targets discussed in the presentation: at least 100 cfs in winter currently, increasing to roughly 300 cfs in 2028 and higher releases later in the planning horizon; staff said that trajectory makes a full Wickiup refill in some years unlikely and reduces operational flexibility for district managers and irrigators.
Practical local impact: city staff said that municipal infrastructure and long-term planning depend on reliable, permanent credits rather than short-term temporary credits. OWRD noted the Deschutes River Conservancy manages many temporary and permanent credits and that allocation decisions and legal frameworks (including recently adopted Division 8 groundwater allocation rules) are shaping how conserved-water benefits are shared among irrigation, municipal and environmental users.
Next steps identified in the meeting included continued policy work around the mitigation program's extension, negotiation and mapping of conserved-water projects, and close coordination between cities and the Deschutes River Conservancy to locate potential mitigation-credit opportunities.
