HOW TO BUILD ON SLOPES

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HOW TO BUILD ON SLOPES
When construction has to be done on steep slopes, Site analysis studies include:

Recommended maximum site ground disturbance;

http://www.cityofgigharbor.net/html/slopes.html

if you have data relevant to any of the above factors, you may use it to prove how harmful construction will be, for example, if the area is prone to earthquakes-low seismic stability, that means very dangerous and accident prone

Steep slopes are prone to erosion if the vegetation on them is disturbed, or if surface runoff is directed toward them. As a result, disturbed slopes often result in siltation of a watercourse or disturbance to land below. Hydrologic functions such as infiltration, frequency and volume of discharges and impacts of the proposed development upon water resources on and off site, must be considered.
Development on steep slopes requires special techniques to prevent soil erosion and to protect water resources. A study of ground and surface water flows of the site may be required to understand possible on- and off-site impacts of a proposed development on the water resources. Landscape work on these sites should be designed to restore native ecologies, to reduce storm water runoff, to enhance infiltration, to increase flood storage capacity, to allow only clean water to exit the site, and to honor natural linkages and natural areas and adjacent water features. Soils must not be permitted to wash from these sites under any circumstances.

The site’s design should incorporate the slopes so that the development complements the character of the landforms, vegetation and topography. Any development must meet all the standards for any other natural features of the site.
http://www.ci.ann-arbor.mi.us/communityservices/Planning/Planning/codes/Slopes%2057-%20NFOC4-28-05.pdf

STEEP SLOPES

Steep slopes are generally defined as land with a slope angle of 20% or greater for a minimum of 30 feet horizontally. These slopes are becoming increasingly popular for home sites as the valleys and flat lands in Utah are lost to development. These steep slopes may make for dramatic home sites, but they also pose problems. Steep slopes are prone to natural disasters, are often expensive to build on, and expensive to maintain. Most likely, they are of aesthetic value to the community below as well (City of Nanaimo 3 Dec. 2004).

Slope failures, erosion, or avalanches may not be as spectacular as tornadoes or earthquakes, but they are usually more widespread. Financial losses from these mass movements of earth and snow are costly. They include not only the direct costs associated with property damage, but also indirect costs such as loss of tax revenues, reduced real estate values, and degraded water quality (Gray 1996). Also, development on steep slopes is often susceptible to wildfire and may be expensive to defend if necessary.

Construction on steep slopes is costly. The costs associated with the cut and fill, earthwork, retaining walls, erosion prevention, etc., is often prohibitive. In cases where cost is not an issue, the maintenance of roads and utilities must be addressed. Cities and towns may be left holding the bill for maintenance costs unless prior arrangements with developers and homeowners have not been made.

It is hard to place an economic value on the aesthetic value and visual quality of steep slopes. If development is to be allowed on steep slopes, care should be taken not to disturb natural scenic features such as cliffs or rock outcroppings. The design of buildings should compliment the natural surroundings and should be placed as to minimize the visual impact (City of Nanaimo 3 Dec. 2004).
Houses built on steep slopes are prone to damage from slope failure.
http://www.governor.utah.gov/planning/CriticalLands/Critical%20Lands%20PDFs/steepslopes.pdf

Land use practices, including forest management and construction of highways, homes and power lines can affect landslide occurrence in unstable terrain.

http://www.forestry.org/or/position/landslides.php

FOR ZYGMUNT WILF NOTHING MATTERS HE CAN BUILD ON ANYTHING. NO STUDIES WERE DONE AS RECOMENDED.

Estimate of storm drainage for preconstruction, during construction and post construction;
Methods to minimize erosion and storm water runoff from site during and after construction;
The seismic stability of the site.