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HomeMy WebLinkAbout2021-06-30-303.115-146 ARTICLE IX1 ARTICLE IX Required Improvements §303.115. Monuments §303.116. Durable iron monuments shall be placed at all lot and block corners, at all angle points in any line, at each of all curves, and at such other points as may be required by the City’s Engineer in accordance with the survey monumentation of Chapter 355, Code of Iowa. §303.117. The external boundaries of the subdivision, block corners, angle points and ends of curves shall be monumented in the field by iron rods of 1/2" to 5/8" diameter or pipes of 3/4" to 1" diameter at least thirty (30) inches long. §303.118. All lot corners and other points not referred to in Section 303.117 shall be monumented in the field by iron rods of 1/2" to 5/8" diameter or pipes of 3/4" to 1" diameter at least twenty-four (24) inches long. §303.119. All monuments shall be properly set flush with the ground by a licensed land surveyor within one (1) year after approval of the final plat. The surveyor shall affix a cap of inert material bearing an embossed or stencil cut marking of the Iowa registration number of the surveyor on the top of each monument. §303.120. Street Construction §303.121. The Subdivider shall grade and improve all streets within the subdivision to the full right-of-way width of the street. Roadway pavement shall be either full width Portland cement concrete with integral curbs or 30-inch Portland cement concrete curb and gutter sections with rolled stone base and asphaltic concrete surface in accordance with the City of Waukee Standard Specifications. The asphaltic concrete surface option is subject to approval by the City Council. Minimum pavement thickness shall be: Portland Cement Concrete 6-inch reinforced or 7-inch non-reinforced Asphaltic Concrete 8-1/2 inches Pavement thickness requirements in commercial or industrial areas will be evaluated on a case-by-case basis. Construction of all streets shall be in accordance with the Standard Specifications. §303.122. The width of the roadway shall conform to the requirements of its functional classification as specified in Article VIII, Section 303.82. 2 §303.123. Alleys shall be paved with either Portland cement concrete or asphaltic concrete to their full width in accordance with the City of Waukee Standard Specifications. §303.124. All streets shall be sodded or seeded with grass in a manner which shall provide suitable protection from erosion over that area lying between the right-of- -way lines and the back of street curbs in accordance with the City of Waukee Standard Specifications. §303.125. Street profiles and the necessary drainage plans to serve the area shall be determined and designed by a Registered Professional Engineer for the Subdivider. All construction of such facilities shall be in accordance with such profiles and plans and the Standard Specifications and shall be subject to the recommendations, supervision and approval of the City’s Engineer. §303.126. Sidewalk Construction §303.127. The Subdivider or as delegated by the Subdivider to a builder, shall install or cause to be installed sidewalks on each side of surfaced streets (for the full length of blocks). Sidewalks shall be a minimum of four (4) feet wide and located in the street right-of-way with the outer edge one (1) foot from the right-of-way line. Sidewalks or trails will be provided at other locations in the subdivision as determined by the City. A. Sidewalks will be installed by developer on streets adjoining the subdivision and having double frontage lots prior to final plat approval. The sidewalks will be installed on street side that adjoins the subdivision unless waived by the City Council. B. Sidewalks will be indicated on the final plat. The developer of a tract of land shall be responsible for the construction of all trails shown on the Waukee Comprehensive Plan. The exact location of these trails will be determined by the City. The developer shall secure the exact location of the trail from the City and shall show such location on the preliminary plat. If the trail is deemed part of a sidewalk, the trail should be constructed of concrete. (Adding trail development) June 6, 2002 – Ordinance No. 2378 3 §303.128. Water Facilities §303.129. Where a public water main is accessible, the Subdivider shall install adequate water facilities to meet the needs of the development and to provide fire flow protection. The size of water main extensions shall be eight (8) inch minimum diameter or larger as required by the City to provide fire flows. The design and construction of these improvements shall be in accordance with the Standard Specifications and the design standards of the Iowa Department of Natural Resources and as approved by the City Engineer and the Municipal water department. Fire hydrants shall be required in all subdivisions. Fire hydrants shall be located in accordance with the provisions of the City of Waukee Standard Specifications. §303.130. If a public utility system is not available, individual wells may be used, provided that construction is in accordance with the Iowa Department of Natural Resources and the Dallas County Health Department, and that permits are issued approving well water for human consumption. §303.131. Sewer Facilities §303.132. Where a public sanitary sewer is accessible, the Subdivider shall install adequate sanitary sewer facilities (including the installation of house service lines to streets right-of-way lines) in accordance with the City standard specifications. §303.133. Where sewage pumping stations are required, the location will be determined by the City’s Engineer. The Subdivider will install the lift station together with all required appurtenances and force main. The Subdivider will be reimbursed in the proportion of which the area outside the subdivision, but served by the pumping station, bears to the total area served by the pumping station. A. If the Subdivider connects to a sewer leading to a sewage pumping station, Subdivider will be required to pay to the City of Waukee his pro rata share of the cost of the pumping station and force main according to the ratio of area the subdivision has to the total area served by the sewage pumping station. §303.134. Where a public sanitary sewer is not available, the minimum lot areas shall conform to the requirements of the City of Waukee zoning ordinance. The Subdivider shall make, or cause to be made, percolation tests of the soil as required by the Dallas County Health Department and City’s Engineer. These tests shall be the basis for design of individual sanitation facilities. Dry sewer shall be provided in addition to other sanitation facilities unless this requirement shall have been waived by the City Council upon recommendation of the Commission. §303.135. In the future, however, if a public sanitary sewer is accessible and a sanitary sewer is placed in a street, alley or easement abutting upon property, the owner thereof shall be required to connect to said sewer for the purpose of disposing of waste; 4 and it shall be unlawful for any such owner or occupant to maintain upon such property an individual sewage disposal system. §303.136. Storm Water §303.137. When a public storm sewer is accessible, the developer shall install storm sewer facilities. Where no outlets are available within a reasonable distance, adequate provision shall be made for disposal of storm water. Design of all storm sewers shall be based upon a 10-year reoccurrence interval. Minimum pipe size shall be fifteen (15) inches except for intake cross-runs which shall be twelve (12) inch minimum diameter. For storms greater than the 10-year, use the 100-year storm for design of overland flow drainage. The developer may consider detention facilities as recommended by the developer’s engineer, and approved by the City Engineer, and in conformance with the storm water management plan of the City. When storm water detention or retention is deemed to be necessary for any development, the following guidelines shall be followed: A. Where possible, underground detention should be considered to mitigate the visual impacts and maintenance difficulties involved with above ground systems. B. Above ground systems may either be for detention or retention. C. Retention systems shall incorporate landscaping and design so that the area acts as a water feature or amenity and not simply as storm water detention. D. Detention shall be landscaped and equipped to provide for useable space rather than vacant ground. Sidewalks, benches, picnic areas, etc. should be used. E. Landscaping shall follow existing site plan requirements. Planting rates for trees and shrubs may be at 1/3 the site plan rate. F. All retention and detention facilities shall be properly maintained in function and appearance per Section 401.4 of the Waukee Code. G. Where possible, retention or detention facilities shall be incorporated into green space, park or trail facilities to provide for more useable and enjoyable space. H. Where possible, regional detention should be incorporated. Large detention areas are typically preferable to numerous smaller areas. I.Concrete flumes shall be used. J.The bottom of any detention facility must be a minimum of two (2) feet above the seasonal high groundwater table. Storm water detention/retention requirements added February 12, 2002 – Ordinance #2361 §303.138. Sump pumps and footing drains shall be required in all plats approved after effective date of this ordinance, in all construction where the foundation is in excess of 42" in depth. The sump pumps and footing drains shall be installed pursuant to the standard specifications for streets and utility improvements as adopted by the City 5 of Waukee. Footing drains may gravity flow to the storm sewer line or to a drainage channel subject to approval by the City Engineer. If a foundation is to be less than 42" in depth, the construction is only required to have footing drains as long as the footing drains gravity flow to the storm sewer line or to a drainage channel subject to approval by the City Engineer. If the footing drains do not gravity flow to the sewer line or a drainage course, the construction is required to have a sump pump. A. All storm sewer design and construction shall be done in accordance with the City of Waukee Standard Specifications. §303.139. Natural Gas §303.140. The Subdivider shall be responsible for the costs of installing the natural gas system within all new subdivisions. The necessary piping and appurtenances shall be installed by the City and all costs, including costs of all yardage and material handling, engineering, inspection, administrative fees, and all other fees above and beyond the normal construction, shall be billed to and paid by the Subdivider. February 14, 2005 – Ordinance 2501 §303.141. Street Lights §303.142. Street lights shall be installed to illuminate all roadways and sidewalk surfaces as determined by the electrical power company and approved by the City Council upon recommendation of the City’s Engineer, and in accordance with the design of the City of Waukee Standard Specifications. Street lights will be provided along the streets adjoining the subdivision. §303.143. Utilities §303.144. All utility lines, including electric lines, shall be underground. It shall be the responsibility of the Subdivider to contact utility companies to determine the availability of services and to make the necessary arrangements for their installation within necessary rights-of-way and easements. §303.145. Public water, storm drains and sanitary sewer or septic system plans shall be designed by a Registered Professional Engineer for the Subdivider. The facilities shall be constructed in accordance with such plans and the City Standard Specifications and shall be subject to the supervision and approval of the City Engineer. The public improvements, except sidewalks, shall be installed or performance bond posted therefor prior to construction of buildings on the lots. A performance bond will be posted with the final plat for the sidewalks that are to be installed in the future. §303.146. The location and depth of all underground utilities shall be in accordance with the City of Waukee Standard Specifications and the general utility location plan prepared by the City’s Engineer.