Every subdivider shall, at the time of filing the final map, submit therewith two (2) copies of an accurate profile of the center line showing road gradients and vertical curve data, using true elevations above sea level for all streets and roads in said subdivision to be offered for dedication to public use. The plans must bear the signature of a Nevada registered engineer. (Ord. 63, 12-8-1971)
(A) All streets and/or roads offered to the city for dedication as shown on a final map or otherwise shall:
1. Have a right of way extending at least two feet (2') beyond those places where the natural surface of the ground must be excavated or covered with fill dirt and materials in constructing such cuts and fills as are necessary to provide the roadbed and drainage ditches required herein.
2. Have a maximum roadway gradient (except as set forth in chapter 7 of this title) of not more than:
Minimum grade | 0.3 percent |
Primary roads through subdivisions | 10.0 percent |
Minimum crown | 0.3 percent |
3. Provide for the clearing of the entire width of the right of way, of all brush, trees, stumps or other debris.
4. Have a minimum paved surface of thirty feet (30') in case of half right of way boundary streets.
5. Be graded as set forth by the specifications of chapter 5 of this title.
6. Be compacted to not less than ninety percent (90%) of the maximum density obtainable by the use of compaction equipment, and addition of water in proper amounts. The requirements apply also to backfilling of all trenches and other excavations across or along the roadbed or right of way.
7. Be provided with necessary drainage ditches, culverts and structures built according to a drainage plan approved by the engineer, who may require a drainage plan be prepared by a civil engineer registered in the state of Nevada, and duly approved prior to commencement of road grading.
8. Be surfaced as follows: Imported select base material shall be crushed gravel, screened riverbed gravel, or decomposed granite, meeting the gradation requirements specified by the engineer. The base thicknesses shall be determined by the soil classification of the subgrade, and in no case shall be less than six inches (6") for residential streets, or eight inches (8") for collector or major streets. The engineer may require soil classification test data be submitted with the construction drawings at the rate of one test per each seven and one-half (71/2) acres being developed. On the basis of these tests, and/or with field observations of the soils, the engineer shall determine the base thickness required.
(B) A paved surface of plant mixed or road mixed asphalt pavement shall be applied to a minimum width two feet (2') less than the minimum width of the roadbed and to a compacted thickness of at least two and one-half inches (21/2"). The design of the mix shall have the written approval of the engineer before placing the pavement.
(C) A liquid asphalt coat of SC 250 grade liquid asphalt may be applied at the rate of at least 3/10 gallons per square yard to the entire width of the base coat. (Ord. 63, 12-8-1971)
(A) Flow line of the curb or gutter shall have a minimum grade of three-tenths of one percent (0.3%).
(B) Curb returns shall have a minimum radius of five feet (5').
(C) Curbs and gutters shall be three thousand (3,000) pound concrete "L" type with five inch (5") type II gravel subbase.
(D) Valley gutters shall be three thousand (3,000) pound concrete six feet (6') in width on street intersections, and two and one- half feet (21/2') in width in alleys where required by the city engineer, both to be six inches (6") thick.
(E) The subdivider shall provide the necessary means to assure complete drainage in and adjacent to his property by making use of state and city drains, natural watercourses, or constructed tributaries.
(F) Drainage channels shall be so designed as to maintain a minimum velocity of two feet (2') per second, and a maximum velocity of eight feet (8') per second.
(G) The subdivider shall submit to the city clerk's office for checking by the engineer, sufficient information in the form of maps and profiles prepared by his surveyor or engineer to indicate the proper drainage of the surface water to natural drainage courses or into city or state drainage systems. If same is across lands intended to be used as private lots, rights of way and easements must be indicated on the proposed lot. The location and width of easements shall be indicated on the plat to be recorded and marked "Easement Reserved for Surface Drainage". If it is deemed necessary by the engineer, ditching shall be provided. Further, if it is deemed expedient, the drain shall be enclosed in pipe made to design size and specifications, and laid to the grade and depth required by the governmental authority.
(H) Circular culverts shall be reinforced concrete pipe with cement joints or corrugated metal or metal arch pipe.
(I) No drainage structure shall be permitted with a diameter of pipe less than twenty four inches (24").
(J) Standard head walls shall be placed on all circular culverts up to seventy two inches (72") in diameter.
(K) The design, size and material used shall comply in all cases with the specifications of the office of the engineer. (Ord. 63, 12-8-1971)
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