A. General:
1. Purpose: The preliminary plat of a subdivision is not intended to be recorded. Its purpose is to show graphically all facts needed to enable the planning and zoning commission to determine whether the proposed design of the subdivision is satisfactory. The preliminary plat shall be designed by a professional surveyor licensed in the state and shall comply with the standards listed in chapter 3 of this title.
2. Public Notice:
a. City Policy: Notice shall be in accordance with public notice policy as set forth by the city council upon review and approval of such policy.
b. Posting Of Signs: Signs per city requirements shall be posted facing each means of public access bordering applicant property. Signs shall be posted and maintained by subdivider. Notarized certification of signs being posted continuously for twenty one (21) days prior to planning and zoning commission meeting shall be provided by the subdivider.
3. Representative At Commission Meeting: A representative of the subdivider must be present at the planning and zoning commission meeting for review of the subdivision to proceed.
B. Submission Of Information: The subdivider shall submit three (3) copies of the following information to the planning and zoning commission, with all prints to be in blue line or black and white.
1. Vicinity Sketch: A vicinity sketch, at a scale of one inch equals one hundred feet (1" = 100') showing the relationship of the plat to its general surroundings and showing the following details:
a. Existing or mapped streets within one hundred feet (100') of the subdivision.
b. Proposed streets with connections to existing or mapped streets.
c. Municipal boundaries within one thousand feet (1,000') of the tract.
2. Layout Plan: A plan of the subdivision at a minimum scale of one inch equals two hundred feet (1" = 200'), on a sheet size eighteen inches by twenty four inches (18" x 24") showing the following information:
a. Items pertaining to title.
b. Proposed name of subdivision.
c. Name and address of the developer and surveyor.
d. Graphic scale.
e. Date prepared.
f. North point.
3. Existing Site Conditions Affecting Subdivision:
a. Tract boundaries as surveyed and certified by a registered surveyor to be a closed traverse. Bearings shall be in degrees, minutes, and seconds. Distances shall be shown in feet and hundredths. Curve data shall include sufficient data to re-establish curve on the ground, including chord, bearing and distance. The error of closure shall not be greater than one foot (1') in three thousand feet (3,000'). All congressional townships and lines of incorporated areas shall be shown.
b. Existing rights of way, streets, alleys and easements within one hundred feet (100') of the subdivision.
c. Existing buildings.
d. The names of all subdivisions immediately adjacent, intersecting points of adjacent lots, and the names of owners of record of adjacent acreage with date of filing, book and page.
e. The locations and sizes of any existing sewers, water lines, fire hydrants, and gas mains, on or within one hundred feet (100') of the subdivision, with pipe sizes and grades indicated and invert elevations where necessary.
f. Contours, with vertical intervals of two feet (2') for land with average natural slope of four percent (4%) or less, at vertical intervals of five feet (5') for more steeply sloping land, such information to be related where practical, to USGS benchmarks or other datum as established by the city engineer.
g. Significant tree masses and isolated trees.
h. The location and widths of any streets, public ways, sewer or water lines, the location and size of parks, or other public places; shown upon an official plan adopted by the planning and zoning commission and the location of any improvements on the site shown on the city's official map.
i. Zoning boundary lines, zoning of applicant property, and zoning of adjacent properties within two hundred feet (200').
4. Proposed Improvements:
a. Location and width of all proposed streets, roads, alleys and utility easements.
b. Parks, playgrounds, and other public areas proposed for dedication.
c. Block designations and lot numbers.
d. Proposed street names.
e. Lot lines and approximate dimensions of lots. Number of lots.
f. Designation of streets, rights of way, easements, and other areas proposed to be dedicated or reserved for public use, together with the conditions of such dedications or reservations.
g. Building setback lines.
h. Copies of any proposed protective covenants to be included in the deed. (Ord. 989, 2-8-1999)
5. Drainage Study: A technical drainage study is required. The study shall discuss in detail the existing site hydrologic conditions and the proposed drainage plan to accommodate or modify these site drainage conditions for the development of the site. The study shall include, but not be limited to, the following information:
a. Location And Description Of The Development: The following information shall be provided:
(1) A description of the property including: general location map, legal description, area in acres, existing site conditions (vegetation, drainage facilities, buildings, etc.), topography, any existing drainage facilities (ditches, culverts, streams, etc.), project description, and the nature of adjacent neighboring development.
b. Identification And Description Of Drainage Basins: Identification and description of the drainage basin(s) in which the development is located. The following information shall be included:
(1) Information on off site flows which enter the subject property at both discrete and nondiscrete points;
(2) A discussion on existing and proposed land uses, by type, and intensity of development;
(3) A description of any natural and manmade conveyances in the drainage basin;
(4) Historic on site drainage patterns;
(5) Historic drainage patterns of upstream runoff; and
(6) Historic discharge points at downstream property lines.
c. Identification Of Previous Drainage Studies: Identify any previous drainage studies for the site, or any previous drainage studies that might affect the subject site.
d. Runoff Analysis: Runoff analysis based on soil conservation services method (SCS) which is outlined in a publication entitled "Peak Rates Of Discharge For Small Watersheds, Chapter 2 (Revised 2/85 For New Mexico), Engineering Field Manual For Conservation Practices". The following limitations shall apply:
(1) Minimum initial time: Five (5) minutes;
(2) Time of concentration equal to the sum of initial time and gutter/pipe flow time. The minimum time of concentration is ten (10) minutes;
(3) Overland flow portions of time of concentrations are to be calculated for a maximum reach length of five hundred feet (500'); and
(4) Design storm requirements shall be initial design storm of 10-year rainfall and return major storm period of 100-year rainfall.
e. Calculations For Off Site Peak Flow: Calculations for peak flow from all off site drainage areas.
f. Calculations For On Site Peak Flow: Calculations for peak flow within the proposed development for areas larger than twenty (20) acres.
g. Analysis Of 100-Year Floodplain: Analysis of 100-year floodplain and drainageways.
h. Analysis Of Downstream Facilities: Analysis of downstream drainage facilities.
i. Analysis Of Anticipated Problems And Solutions: Analysis of drainage problems and solutions which are anticipated within the subject development. Indicate areas and show calculations that may be of concern for hydraulic jump in curb and gutter.
6. Detention/Retention Pond And Drainage Plan Required:
a. Detention/Retention Pond: A detention/retention pond is required for any new subdivision in order to control and manage storm water and drainage for the subdivision. Dependent upon the size and complexity of the subdivision, this requirement may be waived, modified or varied by the planning and zoning commission or the city council. Requests to waive or vary or modify this requirement shall be made in writing by the subdivider or his/her authorized agent, and shall set out the reasons in support of the request.
b. Drainage Plan: A detailed drainage plan(s) for the site shall be submitted with the technical drainage study. The plan(s) shall be at a legible scale (1 inch = 20 feet to 1 inch = 200 feet is recommended). A reference to all hydraulic calculations shall be shown on the plan. The following information shall be shown on the plan, except that the off site drainage basin boundaries may be shown at an appropriate legible scale on a separate plan or a key plan.
(1) The subject property and the proposed platting.
(2) Property lines and streets, including right of way widths within one hundred feet (100') of the subject property.
(3) Existing contours and proposed elevations sufficient to analyze drainage patterns extending one hundred feet (100') past the subject property lines.
(4) Any existing drainage facilities and structures including ditches, channels, street flow directions, and culverts. All pertinent information including material, size, shape, slope and location shall be shown on the plan(s).
(5) Limits of existing floodplains and floodways. The federal emergency management agency (FEMA) floodplain map is to be included.
(6) Existing topography per the requirements of subsection B3f of this section.
(7) Location of all streets and rights of way.
(8) Proposed street and ditch flow paths and slopes.
(9) Identification of drainage basins within the proposed development and tributary to the proposed development.
(10) Proposed on site drainage system plan, with layout and design. Information is to include the on site drainage system outlet to downstream facilities or structures.
(11) The location and design of the pond(s) (size, depth, side slopes, capacity, outlet, and control mechanisms for controlling rate of water discharge from the pond), and any other information required by the planning and zoning commission. The design of the drainage system to convey water to the pond(s) shall be shown on the drainage plan.
(12) Details of any proposed system designed to harvest and distribute storm water for domestic use within the subdivision shall be shown on the drainage plan(s).
7. Compliance With Approved Drainage Plan: The subdivider shall implement the drainage plan as approved by the city council as recommended by the planning and zoning commission. All required drainage works shall be carried out under the supervision of the subdivider's professional engineer who shall be licensed in the state of New Mexico. All required drainage works shall be carried out to the satisfaction of the city staff. The subdivider's professional engineer shall provide supervision and inspection during construction of drainage facilities. The subdivider's professional engineer, upon completion of the drainage works, shall provide written certification to the city staff that all drainage work was constructed in accordance with the approved drainage plan(s). The subdivider, or homeowners' association, or individual homeowners through a provision in their deeds, or other legal and liable entity shall maintain the drainage facilities thereafter so that it(they) is(are) remains functional as designed.
8. Landscaping Of Detention/Retention Pond(s): Storm water detention/retention ponds are required. The city may require that on site detention/retention ponds be landscaped when an on site detention/retention pond is to be used as part of a recreational space for a project, or where such pond is to be located adjacent to and/or is visible from a public street, or where there is risk of soil erosion. The proponent shall be required to prepare or have prepared a landscape plan that shall be acceptable to city council, or the planning and zoning commission and/or the city building inspector, as appropriate. All of the following matters may be considered by the planning and zoning commission in recommending approval of the landscape plan:
a. Landscape Plans: Where the city requires landscaping of a detention/retention pond, the proponent shall be required to prepare or have prepared a landscape plan that shall be acceptable to city council with a recommendation of the planning and zoning commission. The plat shall be drawn at a legible scale satisfactory to city staff. The plan shall clearly describe the location, type, size and spacing of all plant materials. The plan shall also indicate the height and canopy size of trees at maturity, and the height and spread of shrubs at maturity. Other proposed landscape features such as walls, fences, and pedestrian or bicycle walkways or trails shall also be shown.
b. Existing Plant Material: To the extent possible, existing vegetation shall be retained, provided such vegetation is not prohibited by subsection B8f of this section.
c. Low Water Use And Drought Tolerant Plant Material Required: All plant material shall be low water use and drought tolerant and shall be plants listed in the following documents which shall be used as guidelines by the city of Deming:
(1) "Low Water Use/Drought Tolerant Plant List", Arizona department of water resources-Tucson active management area, (March 2002 and later editions).
(2) "The Enchanted Xeriscape, A Guide To Water-Wise Landscaping In New Mexico", office of the state engineer (no date specified, but most recent edition at time of application of the provisions in subsection B8 of this section is to be used).
d. Credit For Existing Plant Material: Credit for existing plant material shall be allowed in accordance with the following provisions:
(1) The preservation and retention of existing plant material within the defined pond basin (pond and side slopes and adjacent areas as designated on the drainage plan(s)), is encouraged provided such plant material is material specified in the guideline documents listed in subsection B8c of this section, and provided such plant material is not prohibited material as described in subsection B8f of this section.
(2) Credit for retained material may be given, at the sole discretion of the city council on the recommendation of the planning and zoning commission. Credit may be given on an equal one to one basis for shade trees, shrubs, and ground cover, provided that the retained trees, shrubs and ground cover are not prohibited by subsection B8f of this section.
(3) In order that city officials may make an informed decision with respect to giving a credit for retained existing plant material, the landscape plan required by subsection B8a of this section shall include the type, location, size, and an opinion as to the general health of the plants to be retained. Such opinion is to be provided by a person acceptable to the city staff or the planning and zoning commission.
e. Ground Cover: Ground cover shall be provided where the basin has slide slopes equal to or greater than two to one (2:1) (horizontal to vertical distance), in order to minimize erosion. Rock, stone or cobble may be used as a ground cover in such situations.
f. Prohibited Plant Material: The following plants are prohibited in all developments in the city of Deming:
(1) European olive trees, all fruiting varieties.
(2) Fruitless mulberry trees.
(3) Salt cedar.
(4) Any plant listed on the "New Mexico Noxious Weed List" (September 20, 1999, as amended from time to time), published by the New Mexico department of agriculture.
9. Supplemental Material:
a. Application.
b. Fees. (Ord. 1089, 6-14-2004)