4-7-220 HILLSIDE SUBDIVISIONS:

A. PURPOSE:

Because of their steeper slopes, the sites of hillside subdivisions ordinarily should have greater attention paid to the potential for drainage, erosion, and slope stability problems than other subdivisions.

B. (Deleted by Ord. 5519, 12-14-2009)

C. STANDARDS:

The following additional standards shall apply to hillside subdivisions:

1. Application Information: Information concerning the soils, geology, drainage patterns, and vegetation shall be presented in order to evaluate the drainage, erosion control and slope stability for site development of the proposed plat. The applicant must demonstrate that the development of the hillside subdivision will not result in soil erosion and sedimentation, landslide, slippage, excess surface water runoff, increased costs of building and maintaining roads and public facilities and increased need for emergency relief and rescue operations.

2. Grading: Detailed plans for any proposed cut and fill operations shall be submitted. These plans shall include the angle of slope, contours, compaction, and retaining walls. Plans shall be consistent with requirements in RMC 4-4-060, Grading, Excavation and Mining Regulations. (Ord. 5828, 12-12-2016)

3. Tracts: Areas of the subdivision deemed to be critical areas due to designation as protected slopes shall be located within a tract or tracts. (Ord. 5745, 1-12-2015)

4. Streets:

a. Streets may only have a grade exceeding fifteen percent (15%) if approved by the Department and the Fire Department.

b. Street widths may be less than those required in the street standards for streets with grades steeper than fifteen percent (15%) if parking prohibition on one or both sides of the street is approved by the Administrator. (Ord. 5745, 1-12-2015)

5. Lots: Lots may be required to be larger than minimum lot sizes required by the Zoning Code. Generally, lots in steeper areas of the subdivision should be larger than those in less steep areas of the subdivision. (Ord. 5745, 1-12-2015)

6. Erosion Control Requirements: Any clearing or grading shall be accompanied by erosion control measures as deemed necessary by the Department. (Ord. 5745, 1-12-2015)