Washington Administrative Code
Title 173 - Ecology, Department of (See also Titles 197, 317, 372, and 508)
Chapter 173-518 - Water resources management program for the dungeness portion of the Elwha-Dungeness water resource inventory area (WRIA) 18
Section 173-518-085 - Maximum depletion amounts
Current through Register Vol. 24-06, March 15, 2024
(1) All unmitigated impacts from the consumptive use of water from the reserves and impacts from implementation of ecology approved mitigation plans shall be debited against the maximum depletion amount for each affected subbasin.
(2) The maximum depletion amounts shall not be exceeded.
(3) No new use that would result in impacts to closed surface waters exceeding the maximum depletion amounts during the critical period shall be allowed. If the cumulative impact calculated for a subbasin exceeds the maximum depletion amount, additional mitigation must be achieved before new uses impacting that subbasin can be authorized.
(4) Ecology shall maintain a record of all appropriations that result in deductions against the maximum depletion amounts. Ecology will account for water use from the maximum depletion amounts by debiting the calculated impact to each closed surface water. The impacts to surface water are calculated as a percentage of the consumptive portion of estimated or measured water use. The deductions from the maximum depletion amounts will be determined after consideration of any implemented mitigation.
(5) Maximum depletion amounts are associated with, and not in addition to, the reserve amounts listed in WAC 173-518-070. Table V shows the maximum depletion amounts for each subbasin management unit.
Table V Maximum Depletion Amounts Due to New Groundwater Appropriation
Subbasin Management Unit |
Cubic Feet Per Second |
Gallons Per Day |
||
Bagley Creek |
0.01 |
6,463 |
||
Bell Creek |
0.0023 |
1,486 |
||
Cassalery Creek |
0.0013 |
840 |
||
Dungeness River and Matriotti Creek |
0.76 |
491,201 |
||
Gierin Creek |
0.0109 |
7,045 |
||
McDonald Creek |
0.003 |
1,939 |
||
Meadowbrook Creek |
0.026 |
16,804 |
||
Siebert Creek |
0.022 |
14,219 |
Statutory Authority: Chapters 90.54, 90.22, 90.82, 90.03, 90.42, and 90.44 RCW. 12-23-054 (Order 07-17), § 173-518-085, filed 11/16/12, effective 1/2/13.