The department hereby establishes the following stream management units (Table I). The boundaries of the management units are shown in WAC
.
Table I
Stream Management Unit Information
| Stream Management Unit Name; Management Point (MP) No.; Control Station Gage No. | Control Station by River Mile (RM); Section; Township and Range; Latitude (Lat.) and Longitude (Long.) | Stream Management Reach Description |
| Mill Creek MP 1 (Mill Creek at Kooskooskie) USGS Gage No. 14013000 | | RM 21.2;
Section 12;
T6N, R37E;
46°00'29"N,
118°07'03"W | Mill Creek at confluence with Walla Walla River (Walla Walla River, RM 33) to headwaters, including tributaries. |
| | | |
| Walla Walla River MP 5a (Walla Walla River at Detour Road) Department Gage No. 32A100 | | RM 32.4;
Section 31;
T7N, R35E;
46°02'36"N,
118°29'24"W | Walla Walla River, RM 32.4 (below confluence of Walla Walla River and Mill Creek) to state line at Walla Walla, including tributaries. |
| | | |
| North Fork Touchet River MP 6a (North Fork Touchet above Dayton) Department Gage No. 32E050 | | RM 0.5;
Section 32;
T10N, R39E;
46°17'50"N, 117°57'04"W | Mouth of North Fork Touchet River to headwaters, including tributaries. |
| | | |
Touchet River
MP 11 (Touchet River at Bolles)
Department Gage No. 32B100 | | RM 40.4;
Section 7;
T9N, R37E;
46°16'27"N, 118°13'12"W | Touchet River, RM 40.1 to RM 54.9 (confluence of North Fork Touchet River and South Fork Touchet River), including tributaries, excluding North Fork Touchet River and its tributaries. |