At a minimum, land-disturbing activities regulated by this chapter as defined in Article III shall comply with the standards and criteria contained in Chapter 5 of the manual and provisions contained in this chapter. When standards are in conflict, the most stringent provisions shall apply.
(Ord. 1529 § 4.1, 1991)
In addition to the manual standards, all clearing activities regulated by this chapter as defined in Article III shall conform to the following standards:
A. 
The project shall be designed to minimize clearing.
B. 
All clearing limits shall be delineated and clearly flagged in the field prior to the commencement of any clearing or other construction.
C. 
From April 1st to October 31st, all cleared areas left undisturbed for more than one day shall be stabilized within 10 days, and from November 1st to March 31st, all cleared areas left undisturbed for more than 12 hours shall be stabilized immediately thereafter. Once construction is complete all cleared areas shall be permanently stabilized.
D. 
Sediment and erosion controls consistent with the manual shall be used on the subject property and shall be installed prior to the commencement of any clearing, grading, or other construction.
E. 
The subject property shall have only one construction entrance for clearing and grading operations which shall be protected to prevent severe disturbance of soils around the entrance and to prevent sediment transport onto paved surfaces.
F. 
Temporary sediment and erosion controls shall be maintained by the permittee so that design performance is ensured throughout the duration of the construction.
G. 
Permanent sediment and erosion controls must be established and be in operation as designed within 30 days of the completion of construction. Temporary sediment and erosion controls shall be removed from the subject property within 30 days after permanent stabilization is achieved.
(Ord. 1529 § 4.2, 1991)
In addition to the clearing requirements of SMC § 16.05.430 and the minimum requirements of SMC § 16.05.420, grading activities regulated by this chapter pursuant to Article III shall conform to the following standards:
A. 
The project shall be designed to minimize changes in grade, cleared areas, and volumes of excavation or fill.
B. 
The maximum gradient on any artificial slope shall be two feet of horizontal run to one foot of vertical fall and shall be constructed so that erosion is minimized.
C. 
The permittee shall at all times protect adjacent private properties and public right-of-ways or easements from damage during grading operations. The permittee shall restore public and private property damaged by the project operations to conditions existing at the time of the issuance of the permit.
(Ord. 1529 § 4.3, 1991)
All clearing and grading activities in addition to the requirements of SMC § 16.05.430 and § 16.05.440 shall make provisions for drainage during construction pursuant to the following requirements and those set forth in the manual.
A. 
Drainage facilities for the conveyance of runoff during construction shall be designed to discharge runoff in a natural and safe location.
B. 
Downstream properties shall be protected from erosion due to increases in volumes, rates, or peak flows of runoff due to the activities on the subject property. Conveyance structures, sedimentation basins, and traps shall be designed for volumes and rates of runoff from the two-year 24-hour storm without erosive damage to on-site drainage facilities.
C. 
All runoff from the subject property shall pass through sediment control devices as detailed in the manual before leaving the subject property.
(Ord. 1529 § 4.4, 1991)
If greater than 500 cubic yards of any material defined in subsection A of this section is used in any of the activities defined in subsections A and B of this section, then sediment and erosion controls shall be required. This standard is applicable to both existing and proposed activities with the usages defined in sub-sections A and B of this section, regardless of having to obtain permits or approvals under Article III. The applicable materials and activities are:
A. 
Stockpiling or open storage of topsoil, crushed rock, gravel, saw dust, mulch, bark, wood chips or similar materials.
B. 
Broadcasting or spreading of the materials defined in subsection A of this section.
The amount and type of sediment and erosion controls for these usages shall be determined by the city engineer on an individual basis. At a minimum these usages shall have properly installed and maintained silt fences, staked hay bales, or similar devices around the perimeter of the activity.
(Ord. 1529 § 4.5, 1991)
The city engineer may require sediment and erosion controls in addition to those specifically stated in this chapter or in the manual if in the judgement of the city engineer the existing temporary or permanent controls are not sufficiently minimizing erosion and sedimentation of waterways.
(Ord. 1529 § 4.6, 1991)