HomeMy WebLinkAboutPRELIMINARY PLAT DRAWING REQUIREMENTS
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The Preliminary Plat Map must be prepared by a Professional Land Surveyor licensed in the State of Washington and the
following graphic features shall be shown on the drawing:
All drawings hall be neat, uncluttered, legible, and drawn to industry standards, on sheet sizes of 24 x 36 or
22 x 34 inches, drawn with APWA lines/weights and symbols, and at a standard engineering scale.
Indicate boundaries of the subdivision by a heavy line. Use heavier line weight for streets so they will stand
out from the lots and contour lines.
The boundaries and approximate dimensions of all proposed lots and tracts to the nearest foot, Include the
square footage of each. Identify all lots proposed to be created by lot number and tracts by alphabetic
identification, together with the purpose of the tract. Also include the location, width, and purpose of each
new easement to be created.
Location, widths, and names of all existing or proposed streets, public ways, or private streets within or
adjacent to the plat. (City will assign street names after initial review of application and plat)
Location of storm water quality/detention facilities, existing vegetation and infiltrative soils areas to be
preserved, and natural drainage features.
Location of any Critical Areas and Critical Area Buffers.
Location of public and private parks, and open space areas
A section or quarter section breakdown with appropriate ties to the subject parcel(s).
The boundaries of any adjacent property under the same ownership as the land to be subdivided.
All existing property lines lying within the proposed subdivision which are to be vacated.
Where the property has been previously subdivided, the original lots, blocks, street easements, etc., shall be
shown in dotted lines in scale with the proposed subdivision.
Identify setbacks from proposed property lines and easements for existing structures to remain.
Show location of all physical and legal description encroachments affecting the boundary between the
application site and the adjoining parcels. Encroachments may be from the application site onto the
adjoining parcels or from the adjoining parcels onto the application site.
tƩĻƌźƒźƓğƩǤ tƌğƷ ağƦ - List of items to be included:
Name, stamp and signature of the Professional Land Surveyor licensed in the State of Washington who
prepared the preliminary plat drawings.
Section, Township and Range of the subdivision.
Legal description.
Name of sewer provider or proposed sewer disposal system.
Name of water provider or source of water supply.
School district.
Fire district.
Telephone service.
Power source.
Existing zoning designation.
Proposed zoning designation.
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Residential Table - Provide a table with the following information for each zone classification on the site
involving residential land uses:
o Proposed land use (i.e. single family, duplex, multi-family)
o Number of dwelling units proposed
o Density proposed dwellings per net acre
o Gross acreage
o Net acre area (list
o Minimum number of dwelling required. (Minimum Density X Net Acres)
o Maximum number of dwellings allowed (Base Density X Net Acres)
o Bonus Density Credit (if proposed)
o Existing zoning designation
o Proposed zoning designation
o Approximate area of smallest lot
Date plan was prepared and space for revision dates for subsequent resubmittals.
Vicinity Map: A vicinity map sufficient to define the plat location and boundaries.
/ƚƓĭĻƦƷǒğƌ DƩğķźƓŭ tƌğƓ - Provide a conceptual grading plan prepared by a Professional Engineer licensed in the State
of Washington, showing:
Existing and proposed grades with cross sections to demonstrate code compliance.
Location of proposed clearing and grading limits.
Contour lines at 2-foot intervals when slopes are 5% or less and 5-foot intervals for slopes exceeding 5% within
the boundaries of the proposal. Contour lines shall be labeled at intervals not to exceed twenty (20) feet, and
shall be based upon current City Datum in accordance with
contour lines which will be altered through filling or excavation shall be indicated by broken lines (final contour
lines shall be indicated by solid lines).
The conceptual grading/clearing plan must identify grading required on site and within proposed or existing
right-of-way.
Contours for critical area features must be sufficient to accurately determine the existing character and extent
of proposed change.
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ƷźƌźƷǤ tƌğƓ - Water, Sewer, Stormwater and Other - Provide a conceptual utility plan prepared by a
Professional Engineer licensed in the State of Washington showing all utility infrastructure needed to serve the
nsive plans, engineering standards or
ordinance requirements. The Conceptual Utility Plan shall include information to ensure that utilities can be constructed
consistent with the preliminary plat layout and that the facilities will ultimately meet City design requirements including
adequate maintenance and repair access. The plans shall specify the following information:
Background grading contours and adequate horizontal and vertical datum.
The location of all existing and proposed ditches, culverts, catch basins, and other parts of the design for the
control and conveyance of surface water drainage; and existing and proposed water quality facilities.
The location of tracts or easements (or other areas) dedicated for retention, detention, and drainage facilities.
The location and size of existing sanitary sewer, storm sewer, and water lines or other utilities lying within or
adjacent to the proposed subdivision.
The location, size and vertical profile for all proposed sanitary sewer, storm sewer, and water lines or other
utilities to serve the proposed subdivision.
The location of any well used for domestic water supply existing within the proposed subdivision or within one
hundred (100) feet of the boundaries of the proposed subdivision.
The location of other utilities other than those provided by the City.
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If electrical transmission lines cross the subject property, show locations of poles and towers. Identify overhead
electrical, and other facilities that are required to be undergrounded.
Place all regional utility lines crossing the site in tract(s) or easements.
Identify any non-City
proposed subdivision.
9ǣźƭƷźƓŭ CĻğƷǒƩĻƭ tƌğƓ Ή CźĻƌķ ƚƦƚŭƩğƦŷǤ - Provide a plan be prepared by a Professional Land Surveyor licensed with
the State of Washington showing the following:
Existing topography of the land indicated with contours at 2-foot intervals when slopes are 5% or less and 5-foot
intervals for slopes exceeding 5% within the boundaries of the proposal. Identify all slopes 25 percent or greater
on or within 25 feet of the site. Contours for streets abutting the property must also be included. Contour lines
shall be labeled at intervals not to exceed twenty (20) feet, and shall be based upon current City Datum in
defined as healthy evergreen
tree, six inches or more in diameter measured four feet above grade, or a healthy deciduous tree four inches or
more in diameter measured four feet above grade (ACC 15.74.030N.).
Show location and extent of all critical areas; shorelines of the state; FEMA flood designations; hydrologic
features within 200 feet of the boundaries to the site; and required buffers and/or setbacks. Indicate if streams
are intermittent and the limits of any wetlands. Identify the limits of the 25-year floodplain for streams and 100-
year floodplain for rivers. Provide names of all water features and all drainage basins served by or containing
these features. Contours for these features must be sufficient to accurately determine the existing character.
Show all existing structures, including rockeries fences and walls; and parcels both within the proposed
subdivision and within 100 feet of the boundaries of the proposed subdivision. Indicate whether or not the on-
site structures will be removed or relocated.
The location, widths, and purposes of any existing easements including recording numbers, lying within the
proposed subdivision; and any known adjacent easements.
Show the location of existing utilities on the property and within adjacent right-of-way.
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