OAR 690-502-0050
Main Stem Willamette River Subbasin


The Main Stem Willamette River Subbasin includes the Willamette River from Willamette Falls near river mile 27 in Oregon City to the confluence of the Middle Fork and Coast Fork Willamette south of Springfield. Stream systems which are tributary to the Willamette River main stem above Willamette Falls are included in the subbasin, except for the major tributary subbasins specified in OAR 690-502-0060 (Middle Fork Willamette River Subbasin) through 690-502-0150 (Columbia Subbasin):

(1)

Surface water classification:

(a)

The following streams and tributaries are withdrawn from further appropriation except storage:

(A)

Second Periwinkle Creek (also known as Cox Creek and Ash Creek) and tributaries near Willamette River mile 118 at Albany are withdrawn from further appropriation by order of the State Engineer dated November 20, 1950;

(B)

Croisan Creek and tributaries near Willamette River mile 84 at Salem are withdrawn from further appropriation by order of the State Engineer dated August 4, 1950;

(C)

Pringle Creek and tributaries near Willamette River mile 84 at Salem are withdrawn from further appropriation by order of the State Engineer dated August 4, 1950;

(D)

Mill Creek and tributaries near Willamette River mile 84 at Salem are withdrawn from further appropriation by order of the State Engineer dated September 22, 1950;

(E)

An unnamed stream and tributaries flowing through Section 24, Township 6 South, Range 4 West, Willamette Meridian, a tributary to Spring Valley Creek in Section 19, Township 6 South, Range 3 West, Willamette Meridian, are withdrawn from further appropriation by order of the State Engineer dated August 18, 1950;

(F)

Corral Creek and tributaries near Willamette River mile 40 are withdrawn from further appropriation by order of the State Engineer dated August 7, 1951;

(G)

Hatlin Creek and tributaries tributary to Potter Creek near Oregon City are withdrawn from further appropriation by order of the State Engineer dated September 22, 1950.

(b)

The Willamette River main stem downstream from the west line of Donation Land Claim 55 in T11S, R4W, upstream from the mouth of the Calapooia River near Albany, except as otherwise specified in subsection (a) of this section, is classified for domestic, livestock, municipal, industrial, agricultural, commercial, power, mining, fish life, wildlife, recreation, pollution abatement, wetland enhancement and public instream uses;

(c)

The Willamette River main stem upstream from the west line of Donation Land Claim 55 in T11S, R4W, upstream from the mouth of the Calapooia River near Albany, to the confluence of the McKenzie and Willamette Rivers, except as otherwise specified in subsection (a) of this section, is classified for domestic, livestock, municipal, industrial, agricultural, commercial, power, mining, fish life, wildlife, recreation, pollution abatement, wetland enhancement and public instream uses from September 1 through June 30, and only for domestic, commercial use for customarily domestic purposes not to exceed 0.01 cfs, livestock and public instream uses from July 1 through August 31;

(d)

The Willamette River main stem above the confluence with the McKenzie River to the confluence of the Middle and Coast Forks of the Willamette River, except as otherwise specified in subsection (a) of this section, is classified for domestic, livestock, municipal, industrial, agricultural, commercial, power, mining, recreation, fish life, wildlife, pollution abatement, wetland enhancement and public instream uses from November 1 through June 30, and only for domestic, commercial use for customarily domestic purposes not to exceed 0.01 cfs, livestock and public instream uses from July 1 through October 31;

(e)

Except as specified in subsection (1)(a) of this rule, tributaries of the Main Stem Willamette River Subbasin are classified for domestic, livestock, municipal, industrial, irrigation, agricultural, commercial, power, mining, fish life, wildlife, recreation, pollution abatement, wetland enhancement and public instream uses from September 1 through June 30, and only for domestic, commercial use for customarily domestic purposes not to exceed 0.01 cfs, livestock and public instream uses from July 1 through August 31.

(2)

For the purpose of maintaining a minimum perennial streamflow sufficient to support aquatic life and to minimize pollution and of attaining the highest and best use of waters released from storage, no appropriations of water except for domestic or livestock uses or waters to be legally stored or legally released from storage shall be made or granted by any state agency or public corporation of the state for the following waters and as shown in Table 1:

(a)

The Willamette River or its tributaries above USGS Gage 14174000 (SW 14 Section 6, Township 11 South, Range 3 West) at Albany, Oregon, for natural flows of the Willamette River below 1,750 cubic feet per second plus waters released from storage of up to 3,140 cubic feet per second measured at the aforementioned gage;

(b)

The Willamette River or its tributaries above USGS Gage 14191000 (SW 14 Section 22, Township 7 South, Range 3 West) at Salem, Oregon, for natural flows of the Willamette River below 1,300 cubic feet per second plus waters released from storage of up to 4,700 cubic feet per second measured at the aforementioned gage;

(c)

The Willamette River or its tributaries above USGS Gage 14198000 (SE 14 Section 23, Township 3 South, Range 1 West) at Wilsonville, Oregon, for natural flows of the Willamette River below 1,250 cubic feet per second plus waters released from storage of up to 4,700 cubic feet per second measured at the aforementioned gage;

(d)

The Willamette River or its tributaries above Willamette Falls at Oregon City for natural flows of the Willamette River below 1,500 cubic feet per second plus waters released from storage of up to 4,700 cubic feet per second measured at or near said Willamette Falls and maintained to the mouth.
[ED. NOTE: Tables referenced are available from the agency.]

Source: Rule 690-502-0050 — Main Stem Willamette River Subbasin, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=690-502-0050.

Last Updated

Jun. 8, 2021

Rule 690-502-0050’s source at or​.us