Ukiah Zoning Code § 9229.12 Required Riparian Trees (CA)

Table 26: Required Riparian Trees, identifies the tree species required to be planted in riparian areas. There is no alternate tree list for riparian areas. In order to plant a tree species that is not included in Table 26, Planning Commission approval of a major exception is required.

A. Exception Review and Considerations: The request for an exception shall be reviewed by the Planning Department, Public Works Department, and the Electric Utility Department. The exception application shall include the following information in addition to the information required by Table 29.

Why species from the required tree list cannot be planted;
Why the alternative species proposed is a preferred and appropriate substitute; and
Other information as determined by the decision making body or reviewing departments.

Table 26: Required Riparian Trees

Common Name Scientific Name	Average Height (feet)	Average Spread (feet)	Evergreen or Deciduous	Drought Tolerance	Native (Yes/No)	Canopy Type	Location Requirement	Modification to Standard

Arroyo Willow Salix lasiolepis	25 ft.	25 ft.	Deciduous	No	Yes	Round	Gibson Creek	Major Exception
Big Leaf Maple Acer macrophyllum	50 ft.	40 ft.	Deciduous	Moderate with deep soil	Yes	Spreading	Gibson Creek	Major Exception
Buckeye Aescukus californica	25 ft.	25 ft.	Deciduous	Yes	Yes	Round	Gibson Creek	Major Exception
California Bay Umbellularia, californica	30 ft.	30 ft.	Evergreen	Yes	Yes	Round	Gibson Creek	Major Exception
California Black Walnut Julgans californica hindsii	60 ft.	40 ft.	Deciduous	Yes	Yes	Spreading	Gibson Creek	Major Exception
Red Willow Salix laevigata	30 ft.	25 ft.	Deciduous	No	Yes	Round	Gibson Creek	Major Exception
Valley Oak Quercus lobata	70 ft.	70 ft.	Deciduous	Yes	Yes	Spreading	Gibson Creek	Major Exception
White Alder Alnus rhombifoloia	50 ft.	40 ft.	Deciduous	No	Yes	Fastigiate	Gibson Creek	Major Exception

(Ord. 1139, §2 (Exh. A, 10.130), adopted 2012)

Explained in plain English