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.
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§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
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§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;
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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
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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.