13.06.030 Extent and designation of recharge areas and protection zones.
A. Recharge Area and Protection Zone Map. The extent of the recharge areas and the protection zones may be seen on the “Recharge Area and Protection Zone Map,” Exhibit 2, attached to the ordinance codified in this chapter. The “Recharge Area and Protection Zone Map” was completed October 21, 1997, and is incorporated and made a part of this chapter. The recharge area boundary lines have been located along streets and or section lines for convenience of assessing which prohibition and restrictions apply to a specific property. This map shall be on file with the city of Midvale, and shall be maintained by the city and public water systems whose groundwater resources lay within the city of Midvale boundaries and jurisdiction. Any amendments, additions, or deletions to this map shall be by the city and/or the public water system following written notice after approval by the drinking water source protection review committee. Notice shall be published at least thirty days prior to consideration by the committee.
B.
1. Designation of Recharge Areas and Protection Zones. The following recharge areas and protection zones are hereby designated within the city of Midvale:
a. Primary recharge area, as determined by the USGS (see Exhibit 2, attached to the ordinance codified in this chapter).
b. Secondary recharge, as determined by the USGS (see Exhibit 2, attached to the ordinance codified in this chapter).
c. Protection zone 1 shall be the area within a one-hundred-foot radius from the well or margin of the collection area.
d. Protection zone 2 shall be the area within a two-hundred-fifty-day groundwater TOT to the margin of the collection area, the boundary of the aquifer(s) which supplies water to the groundwater source, or the groundwater divide, whichever is closer.
e. Protection zone 3 shall be the area within a three-year TOT to the margin of the collection area, the boundary of the aquifer(s) which supplies water to the groundwater source, or the groundwater divide, whichever is closer.
f. Protection zone 4 shall be the area within a fifteen-year TOT to the margin of the collection area, the boundary of the aquifer(s) which supplies water to the groundwater source, or the groundwater divide, whichever is closer.
2. In determining the location of properties and facilities within the areas and zones depicted on the drinking water source protection overlay map, the following rules shall apply:
a. Property located wholly or partially in a recharge area or a protection zone on the overlay map shall be governed by the restrictions applicable to that recharge area or protection zone.
b. Properties located within more than one recharge area or protection zone as shown on the overlay map shall be governed by the restrictions applicable to the most restrictive protection zone.
C. Review of Recharge Area Protection Zone Map. The “Recharge Area and Protection Zone Map” shall be reviewed at least one time every five years or more frequently if determined appropriate by the city of Midvale. Failure to conduct this review shall not affect the validity of the existing approved map. The basis for updating the map may include, but is not limited to, the following:
1. Changes in technical or scientific knowledge in the areas of geohydrology, hydraulics, and geology.
2. Changes in wellfield configuration.
3. Changes in pumping rates for the wellfield.
4. Development of new wells, wellfields, and/or springs.
5. Changes in water quality. (Ord. 2-17-98 § 4)