Walla Walla Subbasin Closed to New Groundwater Permits

The Oregon Water Resources Department (“OWRD”) issued amended rules designating the Walla Walla subbasin as a Serious Water Management Problem Area (“SWMPA”).[1] The amended rules, filed on May 22, 2017, specify new groundwater permits will not be issued in the SWMPA and new groundwater uses will only be allowed for the statutorily exempt uses outlined in Oregon Revised Statutes (“ORS”) 537.545.[2] Some of the statutorily exempt uses for which groundwater may be used, as outlined in ORS 537.545, include stockwatering purposes, watering a one-half acre lawn or noncommercial garden, single or group domestic purposes not exceeding 15,000 gallons per day, or a commercial purpose in an amount not exceeding 5,000 gallons a day.

The SWMPA designation applies to the areas shown on the map accompanying the revised Oregon Administrative Rules (“OAR”).[3] Any already existing groundwater well that is drilled into the basalt and develops groundwater from the Columbia River Basalt Group will be required to install a totalizing flow meter on their well by January 1, 2019.[4] The totalizing flow meter measures and displays both the instantaneous flow rate of groundwater produced from the well and the total volume of groundwater produced from the well. The water right holder, well owner, or well operator will also be required to keep a complete record of the volume of water appropriated each month and submit an annual report of those water use measurements to OWRD.

OWRD implemented the new rules because it has tracked that groundwater levels have dropped by up to four feet per year in the deeper basalt aquifer and by about 100 feet over the past 80 years in the deeper basalt aquifer. The stated policy behind the new rules is to attempt to prevent the declining groundwater levels from growing worse and to ensure enough water is available for senior water use right holders. While some drillers and water users have concerns that OWRD did not consider the possibility that additional water is available in deeper basalt levels, some water use right holders have stated they are glad OWRD is taking steps to protect the resource.[5]

An additional concern was that the Walla Walla Subbasin spans the border between Oregon and Washington and that any action taken by Oregon water users to preserve the resource could be undermined by Washington; however, the two states advise that they have been working together to ensure neither state’s water usage undermines the water savings of the other state. OWRD also plans to work with the local community in the Milton-Freewater area to implement a voluntary, long-term water plan.

This is the first SWMPA established in Oregon.

[1] Or. Admin. R. 690-507-0030.

[2] Or. Admin. R. 690-507-0030(3).

[3] Or. Admin. R. 690-507-0030, Exhibit Map 507-1, available at http://www.oregon.gov/owrd/LAW/docs/law/690_507_Exhibitmaps_2017_May_22.pdf.

[4] Or. Admin. R. 690-5070-0030(4).

[5] Mateusz Perkowski, New Agricultural Wells Prohibited in Oregon’s Walla Walla Subbasin, East Oregonian (May 18, 2017) http://www.eastoregonian.com/eo/local-news/20170518/new-agricultural-wells-prohibited-in-oregons-walla-walla-subbasin