OAR 690-507-0010: Definitions

The following meanings apply to the terms as used in these rules for the Umatilla Basin Program. Other rules of the Department may define these words differently: (1) "Classification" or "Classified" means the allowed and preferred beneficial use(s) of a given surface or groundwater source for which future appropriations of water shall be permitted. (2) "Commission" means the Water Resources Commission. (3) "Department" means the Oregon Water Resources Department. (4) "Director" means the Water Resources Director. (5) "Minimum Perennial Streamflow" or "Minimum Streamflow" means an administrative rule that establishes a flow necessary to support aquatic life, recreation or minimize pollution. The rule includes a priority date and specifies streamflow levels for all or any period of the year. It establishes priority for instream use over future appropriations and identifies flow objectives for future management in streams where shortages occur. (6) "Statutorily Exempt Groundwater Uses" means those uses for which no groundwater application, permit, or certificate is required under ORS 537.545. These uses are for: (a) Stockwatering purposes; (b) Watering any lawn or noncommercial garden not exceeding one-half acre in area; (c) Watering the grounds, three acres in size or less, or schools that have less than 100 students and that are located in cities with a population of less than 10,000; (d) Single or group domestic purpose in an amount not exceeding 15,000 gallons a day; (e) Down-hole heat exchange purposes; or (f) Any single industrial or commercial purpose in an amount not exceeding 5,000 gallons a day. (7) "Subbasin" means any subarea of a basin defined by surface drainage patterns such as the drainage basin of any tributary, or the area draining to any point on a river or draining between two points on a river. (8) "Umatilla Basin" means the area comprised by the Walla Walla River, Wildhorse Creek, Upper Umatilla River, Birch and McKay Creeks, Columbia-Umatilla Plateau, Butter Creek, and Willow Creek subbasins as shown on Water Resources Department map number 7.6. (9) "Withdrawal" or "Withdrawn" means an order of the Commission, or State Engineer or a Legislative act prohibiting all new appropriations for particular uses from a source for part or all of the year. A withdrawal can be set for a prescribed length of time or indefinitely until modified by the Commission. [ED. NOTE: To view attachments referenced in rule text, click here to view rule.]