A. Certain areas of the City are characterized by slope, vegetation, drainage, rock outcroppings, geologic conditions, and other physical factors which, if disturbed for the purposes of development, can cause physical damage to public or private property or both. Therefore, the development of such areas and adjacent land requires special care on the part of the public and private sectors.
B. The standards, guidelines and criteria established by this Chapter shall include, but not be limited to the following:
1. The protection of public from natural hazards of storm water runoff and erosion by requiring drainage facilities and the minimal removal of natural vegetation.
2. The minimization of the threat and consequential damages of fire in hillside areas by establishing fire protection measures.
3. The preservation of natural features, wildlife habitat and open space.
4. The preservation of public access to mountain areas and natural drainage channels.
5. The retention of natural topographic features such as drainage channels, streams, ridge lines, rock outcroppings, vistas, trees, and other natural plant formations.
6. The preservation and enhancement of visual and environmental quality by use of natural vegetation and the prohibition of excessive excavation and terracing.
7. The assurance of an adequate transportation system for the total hillside area to include consideration of the approved Master Street Plan of the City. This system design will consider densities and topography with minimal cuts, fills and other visible scars.
8. The establishment of on-site traffic facilities that ensure ingress and egress for vehicles including, emergency vehicles into all developed areas at any time.
9. The encouragement of a variety of development designs and concepts that are compatible with the natural terrain of the sensitive areas and will preserve open space and natural landscape.
(Ord. 76-15, 5-6-1976; amd. Ord. 85-27, 6-13-1985)
As used in this Chapter, the following words and terms shall have the meanings ascribed to them in this Section:
AVERAGE SLOPE: Shall mean and be determined by the use of the following formula:
A. S = .00229 (I) (L)
A
A
S = Average slope in percent.
.00229 = The conversion factor of square feet to acres.
A = Total number acres in the parcel.
I = Contour interval in feet. The contour interval may not exceed ten feet (10').
L = Summation of the length of all contour lines, in feet, within the parcel.
B. In the determination of the average slope, the average (A) need not include any part of the site having a slope greater than thirty percent (30%). If such areas are excluded from determination of average slope, their acreage shall not be included as part of the total area of the site for purposes of determining the number of dwelling units allowed, but may be included with individual building lots.
C. Areas with slopes exceeding thirty percent (30%) may be:
1. Placed in permanent open space and maintained by a responsible legal entity; or
2. Platted with adjacent approved building lots with an open space easement; or
3. Other proposals may be prepared by the developer and submitted for approval of the Planning Commission.
BUILDABLE LAND: That land within a lot or development site, no part of which has slope exceeding thirty percent (30%).
DEVELOPMENT SITE: Shall mean and include the total perimeters of a subdivision or a planned unit development, or a tract, lot or parcel of land intended to be used as commercial, industrial or institutional use.
GROSS ACREAGE: The total area of the development, including all rights of way and other nonresidential uses.
IMPERVIOUS MATERIALS MATTER: That is impenetrable by moisture.
NATURAL VEGETATION: This term shall include orchards, indigenous trees, shrubs, grass and perennial growth.
NET RESIDENTIAL ACREAGE: All land within a development site devoted exclusively to a residential use.
OPEN SPACE: Includes land area of the site not covered by buildings, parking structures, or accessory structures except recreational structures. May also include any combination of public, private and common spaces.
USABLE OPEN SPACE: Is that which:
A. Has been properly designed;
B. Has been provided with landscaping and perhaps other facilities; and/or
C. Has been provided with a program of continuing maintenance.
(Ord. 76-15, 5-6-1976; amd. Ord. 85-27, 6-13-1985; 1999 Code)
A. Creation: There is hereby created a Sensitive Area Overlay Zone consisting of those areas shaded on that certain plat of the City, dated May 2, 1985, which has been filed with the City Recorder and made a part hereof.
B. Jurisdiction Of Sensitive Area Overlay Zone: The provisions of this Chapter shall apply to all lands in the City which lie within the area designated on the Zoning Map as the Ogden City Sensitive Area Overlay Zone. No building or structure may be erected or reconstructed on land which is designated on the Zoning Maps of the City as sensitive area, nor shall such land be subdivided, graded or otherwise disturbed for purposes of development or subdivision, unless such construction, subdivision or disturbance is undertaken in accordance with this Chapter.
C. Effect Of Provisions: The regulations of this Chapter shall be supplemental to, and not in lieu of, the applicable zoning provisions of the use district in which the land is located and/or general provisions applicable to all zones. However, in the event of conflict between such additional provisions and the provisions of this Chapter, the more restrictive provisions shall apply.
D. Application To Previous Development: The provisions of this Chapter shall have no application to any development or other construction project which has been granted preliminary approval prior to the effective date hereof.
(Ord. 76-15, 5-6-1976; amd. Ord. 85-27, 6-13-1985)
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