The regulated areas are listed below:
A. ERZ Watercourses
The regulated area for ERZ watercourses includes the 100-year floodplain for all watercourses. ERZ watercourses include:
1. Watercourses zoned as ERZ;
2. Watercourses that have been designated for preservation in the Tucson
Management Study and are delineated as proposed for ERZ designation or as under review for ERZ designation shall be considered as ERZ watercourses; or
3. The designated, proposed and under review watercourses are shown on the Hydrologic Data and Wash Information maps on the Tucson Department of Transportation internet web site.
B. WASH Watercourses
The regulated area for WASH watercourses includes channel and banks of a watercourse and the area within 50 feet of the top of the bank, or where there is no defined bank, 50 feet from the ten-year flood boundary. WASH watercourses include:
1. Watercourses designated by name in the Watercourse Amenities, Safety and Habitat regulations in Article VIII of Chapter 29.
2. Watercourses that have been designated for preservation in the Tucson
Management Study and delineated as proposed for WASH designation or as under review for WASH designation shall be considered as WASH designated watercourses.
3. The designated, proposed and under review watercourses are shown on the Hydrologic Data and Wash Information maps on the Tucson Department of Transportation internet web site.
4. The regulated area for watercourses under this technical standard 4-02.2.2.B.2 and 3 above shall not extend beyond the 100-year floodplain.
C. Regulatory Floodplain Watercourses
Within floodplains that are not designated as an ERZ or WASH watercourses in accordance with Sections 4-02.2.2.A or B above, the regulated area is the area within the 100-year floodplain for watercourses with flows of 100 cfs or more including, by not limited to, those areas which contain any of the following:
1. Hydroriparian, Mesoriparian, or Xeroriparian Types A, B or C habitats as delineated by Pima County as part of Article X of the Pima County Floodplain and
Hazard Ordinance.
2. Hydroriparian, Mesoriparian, or Xeroriparian High or Xeroriparian Intermediate Habitats as delineated in the TSMS Phase II
Master Plan.
3. Xeroriparian Low Habitats as delineated in the TSMS Phase II
Master Plan or Type D habitat as delineated by Pima County for connectivity between higher habitat classes, if low-volume, high-value habitats are present, including tabosa swales or similar habitats.
4. Unclassified or undocumented riparian habitat of equivalent value to the above criteria.