Restrictively Classified Areas Within the Willamette Valley (Groundwater Limited Areas) |
Sandy-Boring March 13, 1992 | Shallow Troutdale, Deep Troutdale Formation | Exempt uses only | | 22 sq. mi.
(map) | Clackamas |
OAR 690-502-0170,
Exhibit |
Damascus March 13, 1992 | Columbia River Basalt, Troutdale Formation | Exempt uses only | | 20 sq. mi
(map) | Clackamas |
OAR 690-502-0180,
Exhibit |
Gladtidings March 13, 1992 | Columbia River Basalt | Exempt uses only | | 25 sq. mi
(map) | Clackamas |
OAR 690-502-0180,
Exhibit |
Kingston March 13, 1992 | Columbia River Basalt | Exempt uses only | | 5 sq. mi.
(map) | Linn |
OAR 690-502-0180,
Exhibit |
Mt. Angel March 13, 1992 | Columbia River Basalt | Exempt uses only | | 16 sq. mi.
(map) | Marion |
OAR 690-502-0180,
Exhibit |
Sherwood-Dammasch-Wilsonville March 13, 1992 | Columbia River Basalt | Exempt uses only | | 63 sq. mi.
(map) | Clackamas, Washington |
OAR 690-502-0190,
Exhibit |
Stayton-Sublimity March 13, 1992 | Columbia River Basalt | Exempt uses only | | 72 sq. mi.
(map) | Marion |
OAR 690-502-0180,
Exhibit |
Chehalem Mountain March 13, 1992 | Columbia River Basalt | Exempt uses, 5-year permits on irrigation, fire protection | One ac-ft/ac on irr. Drip efficiency | 104 sq. mi.
(map) | Washington, Yamhill |
OAR 690-502-0200,
Exhibit |
Parrett Mountain March 13, 1992 | Columbia River Basalt | Exempt uses only | | 11 sq. mi.
(map) | Washington,Yamhill |
OAR 690-502-0180,
Exhibit |
Eola Hills March 13, 1992 | Columbia River Basalt | Exempt uses, 5-year permits on irrigation, fire protection | One ac-ft/ac on irr. Drip efficiency | 81 sq. mi.
(map) | Polk, Yamhill |
OAR 690-502-0200, ,
Exhibit |
South Salem Hills March 13, 1992 | Columbia River Basalt | Exempt uses, 5-year permits on irrigation, fire protection | One ac-ft/ac on irr. Drip efficiency | 88 sq. mi.
(map) | Marion |
OAR 690-502-0200,
Exhibit |
Amity/Walnut Hills December 4, 2003 | Columbia River Basalt | Exempt uses, Irrigation by LL | Irr. to estab. crop Efficiency stds | 50 sq. mi.
(map) | Yamhill |
OAR 690-502-0210,
Exhibit |
Other Restrictively Classified Areas |
South Coast April, 1980 | Sand Dune and Bedrock Aquifers | Most exempt uses | | 18.4 sq. mi.
(map) | Coos |
OAR 690-517-0000 (1),
Exhibit |
Ella Butte Jan 25, 1990 | Columbia River Basalt | Exempt uses only | | 151 sq. mi.
(map) | Morrow, Gilliam |
OAR 690-507-0070 (3),
Exhibit |
Fort Rock Feb 23, 1990 | Basin fill / volcanics | Most exempt uses, QM, others (see rule) | | 2,161 sq. mi.
(map) | Lake, Klamath, Deschutes |
OAR 690-513-0060 (2)(n),
Exhibit |
Harney Valley April 15, 2016 | Basin fill / volcanics | Exempt uses only | | 2,416 sq. mi.
(map) | Harney |
OAR 690-512-0020,
Exhibit |
Walla Walla May 11, 2017 | Basin Fill / Columbia River Basalt | Exempt uses only | | 480.3 sq. mi.
(map) | Umatilla |
OAR 690-507-0030,
Exhibit |
Smith River Dec 7, 2017 | Alluvial and Bedrock Aquifers | Exempt uses only | LL possible for Smith R classified uses. | 90.4 sq. mi.
(map) | Curry |
OAR 690-517-0000 (11) |
Critical Groundwater Areas |
Cow Valley Nov 12, 1959 | Alluvial aquifer | Exempt uses only | | 33 sq. mi.
(map) | Malheur |
Special Order Vol.10 Pg 216 |
The Dalles Dec 11, 1959 | Columbia River Basalt | | Exempt uses | 21 sq. mi.
(map) | Wasco |
Special Order Vol.10 Pg 247 |
Cooper-Bull Mtn May 17, 1974 | Columbia River Basalt | Domestic and stock water exempt uses only | Domestic and stock exemption on 10 ac tracts and greater | 41 sq. mi. | Washington |
Special Order Vol.24 Pg 370 |
Ordnance Basalt April 2, 1976 | Columbia River Basalt | Exempt uses only | | 175 sq. mi.
(map) | Morrow, Umatilla |
Special Order Vol.27 Pg 40 |
Ordnance Gravel April 2, 1976 | Alluvial aquifer | Exempt uses only | | 82 sq. mi.
(map) | Morrow, Umatilla |
Special Order Vol.27 Pg 40 |
Butter Creek Jan 27, 1986 | Columbia River Basalt | Exempt uses only | | 274 sq. mi.
(map) | Morrow, Umatilla |
Special Order Vol.40 Pg 1 |
Stage Gulch May 15, 1991 | Columbia River Basalt | Exempt uses only | | 183 sq. mi.
(map) | Umatilla |
Special Order Vol.45 Pg 278 |
Groundwater Withdrawal Areas |
Mosier May 13, 1988 | Pomona & Priest Rapids aquifers of Columbia River Basalt Group | Exempt uses only | No school exemption | 6 sq. mi. (map) | Wasco |
Special Order Vol.76 Pg 489 and
Vol 76 Pg 492 |
Victor Point Sept 28, 2001 | Columbia River Basalt | No new uses | | 1 sq. mi. (map) | Marion |
Special Order Vol.55 Pg 1088 |
Groundwater Mitigation Program Area |
Upper Deschutes Basin September 13, 2002 | All | No restriction | Mitigation required for impacts to Deschutes Scenic Waterway | 4,500 sq. mi.
(map) | Deschutes |
OAR Chapter 690, Divisions 505,
521, and
522,
Exhibit |