BENCH. A relatively level step excavated into earth material on which fill is to be placed.
COMPACTION. The densification of a fill by mechanical means.
CUT. See "Excavation."
DOWN DRAIN. A device for collecting water from a swale or ditch located on or above a slope, and safely delivering it to an approved drainage facility.
EROSION. The wearing away of the ground surface as a result of the movement of wind, water or ice.
EXCAVATION. The removal of earth material by artificial means, also referred to as a cut.
FILL. Deposition of earth materials by artificial means.
GRADE. The vertical location of the ground surface.
GRADE, EXISTING. The grade prior to grading.
GRADE, FINISHED. The grade of the site at the conclusion of all grading efforts.
GRADING. An excavation or fill or combination thereof.
KEY. A compacted fill placed in a trench excavated in earth material beneath the toe of a slope.
SLOPE. An inclined surface, the inclination of which is expressed as a ratio of horizontal distance to vertical distance.
TERRACE. A relatively level step constructed in the face of a graded slope for drainage and maintenance purposes.
- Grading in an isolated, self-contained area, provided there is no danger to the public, and that such grading will not adversely affect adjoining properties.
- Excavation for construction of a structure permitted under this code.
- Cemetery graves.
- Refuse disposal sites controlled by other regulations.
- Excavations for wells, or trenches for utilities.
- Mining, quarrying, excavating, processing or stockpiling rock, sand, gravel, aggregate or clay controlled by other regulations, provided such operations do not affect the lateral support of, or significantly increase stresses in, soil on adjoining properties.
- Exploratory excavations performed under the direction of a registered design professional.
- The nature and distribution of existing soils;
- Conclusions and recommendations for grading procedures;
- Soil design criteria for any structures or embankments required to accomplish the proposed grading; and
- Where necessary, slope stability studies, and recommendations and conclusions regarding site geology.
- A cut surface shall be permitted to be at a slope of
1.5 units horizontal to one unit vertical (67-percent
slope) provided that all of the following are met:
- It is not intended to support structures or surcharges.
- It is adequately protected against erosion.
- It is no more than 8 feet (2438 mm) in height.
- It is approved by the building code official.
- Ground water is not encountered.
- A cut surface in bedrock shall be permitted to be at a slope of one unit horizontal to one unit vertical (100- percent slope).
Where more than two terraces are required, one terrace, located at approximately mid-height, shall be at least 12 feet (3658 mm) in width.
Swales or ditches shall be provided on terraces. They shall have a minimum gradient of 20 horizontal to 1 vertical (5 percent) and shall be paved with concrete not less than 3 inches (76 mm) in thickness, or with other materials suitable to the application. They shall have a minimum depth of 12 inches (305 mm) and a minimum width of 5 feet (1524 mm).
A single run of swale or ditch shall not collect runoff from a tributary area exceeding 13,500 square feet (1256 m2) (projected) without discharging into a down drain.
Erosion control for the slopes shall be installed as soon as practicable and prior to calling for final inspection.