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POL Government Elected Officials Auditor Griffin-Valade Charter, Code & Policies City Code & Charter Online Code & Charter Title 10 Erosion Chapter 10.30 Requirements
10.30.030 Additional Requirements for Special Sites.

(Amended by Ordinance No. 179690, effective November 18, 2005.) When the Director determines that special site conditions may prevent compliance with Section 10.30.020, the Director may require additional erosion, sediment and pollutant control measures.
 
A. Special site conditions may include, but are not limited to, the following:
1. Slopes before development that are greater than 10 percent (1 Vertical:10 Horizontal).
 
2. Ground disturbance of a natural vegetative buffer within 50 feet of a wetland and or water body.
 
3. The development site is located entirely or partially within an Environmental Overlay Zone or Greenway Overlay Zone.
 
4. The development site or development phase will have ground disturbing activity at any one time of 10,000 square feet or more. Single family dwellings and duplex dwellings are exempt from this size limitation.
 
5. The development includes a land division containing 10,000 square feet or more.
 
6. Project timing is such that ground disturbing activity will take place between October 1 and April 30.
 
7. The development involves discharge or offsite disposal of dewatering or trench spoils.
B. Additional requirements imposed by the Director to achieve compliance with Section 10.30.020 A. may include, but are not limited to, the following:
1. Requiring drainage control in compliance with Titles 17 and 24 during all development phases.
 
2. Requiring that a State of Oregon registered professional engineer, other professional certified by the State of Oregon with experience or qualifications in preparing erosion control plans, or a registered CPESC prepare or implement the erosion and sediment control plan.
 
3. Prohibiting ground disturbing activities between October 1 and April 30.
 
4. Limiting the amount of denuded soil at any given time
 
5. Requiring a bond, letter of credit or other guarantee.