(Amended by Ordinance No. 179690, effective November 18, 2005.) The following
minimum requirements apply to all development and ground disturbing
1. No visible and measurable sediment or pollutant shall
exit the site, enter the public right-of-way or be deposited into any water
body or storm drainage system.
2. Depositing or washing soil into a water body or the
storm drainage system is prohibited.
3. Ground disturbing activities requiring a permit shall
provide adequate public notification of the City’s Erosion Control Complaint
1. Install measures intended to keep soil on site or out
of water bodies, storm drainage systems or the public right-of-way as the
first step in any development. These measures shall be made functional prior
to any upslope development taking place.
2. Remove any soil that enters the public
3. Protect stormwater inlets that are functioning during
the course of the development by approved sediment control measures so that
sediment-laden water cannot enter the inlets without first being filtered.
4. Apply permanent or temporary soil stabilization to
denuded development site areas in conformance with the following schedule.
Permanent non-permitted ground disturbing activities may achieve compliance
with this schedule by installing and maintaining approved permanent Best
Management Practices (BMPs) that meet the purpose of this Title.
a. Between October 1 and April 30, all denuded sites
shall be provided with either temporary or permanent soil stabilization as
soon as practicable, but in no case more than two days after ground
disturbing activity occurs.
b. Between May 1 and September 30, temporary erosion and
sediment control measures to reduce dust and sediment transport shall be
applied as soon as practicable, but in no case more than seven days after
ground disturbing activity occurs.
c. Ground cover shall be installed on any portion of a
site that is denuded for more than six months. Sports fields or playgrounds
surrounded by vegetative cover or permanently installed curbing are exempt
from this requirement.
d. Temporary measures shall be maintained until
permanent measures are established.
e. Ground disturbing activity taking place between
October 1 and April 30 for sites located in the Balch Creek Subdistrict of
the Northwest Hills plan district is prohibited, and is not subject to
Alternate Methods review per Section 10.40.040. (See Chapter 33.563 of the
City of Portland Zoning Code.)
5. Plant replacement vegetative cover that does
not include plants listed in either the Nuisance or the Prohibited Plant List,
as set forth in the City of Portland Plant List. Permanent non-permitted
ground disturbing activities are exempted from this requirement.
6. Secure or protect soil stockpiles throughout
the project with temporary or permanent soil stabilization measures. The
responsible party is accountable for the protection of all stockpiles on the
site, and those transported from the site. Depositions of soil may be subject
to additional regulations requiring permit, review or erosion and sediment
7. Select BMPs from the Erosion Control
8. Post signage on the site of the permitted
ground disturbing activity that identifies the City’s Erosion Control
Complaint Hotline number or the responsible City project manager/inspector.
Permanent non-permitted ground disturbing activities are exempted from this
a. Post a sign on the site that is clearly
visible from the right-of-way. The sign shall be at least 18" by 18" and
made of materials that shall withstand weather for the duration of the
project. Lettering shall be at least 3" high and easily readable. Signs
shall be color coded or otherwise marked to identify the appropriate
enforcing bureau; or
b. Another visual notification method approved
by the Director of the designated enforcing bureau.
9. Demonstrate that any trench dewatering and
trench spoils will be managed onsite or provide discharge approval from the
Bureau of Environmental Services for offsite discharge.
10. Identify sites where potential pollutants will
be stored, used, or disposed. Such sites must provide adequate containment to
prevent the release of non-soil pollutants.