Chapter 19.90
DRAFTING STANDARDS
Sections:
19.90.020 General requirements.
19.90.010 Introduction.
The items herein contained are the drafting standards, conditions, and specifications of the city of Rock Island, and are to be considered in conjunction with other provisions of city plans and/or regulations governing the submittal of design, construction, survey, or other plans and profiles. The city by this reference adopts the latest edition of the “Standard Specifications for Road, Bridge and Municipal Construction” (hereinafter referred to as the “Standard Specifications”) as prepared by the Washington State Department of Transportation and the Washington State Chapter of the American Public Works Association to govern all aspects of sanitary sewer system improvements including but not limited to materials, labor, equipment for installation, workmanship, testing, etc. Any material, design, standard, or testing not specifically addressed within this document shall be as per the Standard Specifications. (Ord. 01-062 § 5).
19.90.020 General requirements.
The following general requirements shall be met, unless otherwise provided for within this title, when plans are submitted to the city of Rock Island:
A. All final plans shall be prepared on standard double-matte mylar sheets. The standard sheet size is 24 inches by 36 inches by three mil thick. All sheets shall be original or archival quality, Dayrex Dx 11 copy or equal.
B. The professional engineer’s seal, signature, address and phone number shall be placed in the title block area.
C. The drawing shall be in ink on approved mylar. No “sticky-back” or pasted pieces shall be allowed.
D. Use of the NGVD 29 datum for survey reference is required.
E. All existing and proposed improvements shall be located and dimensioned to the Government Land Office monument system, State Plane Coordinates, or Douglas County survey monuments, or a monumentation system approved by the city. Proposed improvements should be referenced to the monument lines and street centerlines. Dimensioning must be done by stationing and offset from these control lines.
F. Scales. The scale shall be a standard engineering ratio.
G. The plan shall be drawn so the north arrow points to the left or to the top of the sheet.
H. The minimum lettering size is one-tenth inch. This is to ensure the plan is legible after microfilming or reduction.
I. The standard Washington State Chapter of the American Public Works Association symbols shall be used.
J. Match lines with matched sheet number shall be provided where the plan is drawn on two or more sheets. Where the plan is shown on three or more sheets, include a total site plan key map at scale one inch equals 100 feet or one inch equals 200 feet to cross-reference portions of the project with their corresponding plan sheet location.
K. All division or phase lines shall be indicated showing proposed limits of construction.
L. Existing and proposed topography contours shall cover the entire site and a minimum of 30 feet beyond the site boundary. Topography contours should be shown at two-foot intervals (five-foot intervals for slopes greater than 15 percent, 10-foot intervals for slopes greater than 40 percent). Elevation labeling shall be shown at 10-foot intervals maximum for two-foot contour intervals, maximum 25 feet for five-foot contour intervals.
M. Show and clearly label property lines (with distances and bearings), right-of-way lines, sensitive areas and setbacks and all existing and proposed easements with their recording numbers. Show any existing and proposed building footprints, when applicable.
N. Label all streets by city of Rock Island names.
O. Plans shall include a key for abbreviations and a legend for symbols where such are used.
P. Preliminary plans should be submitted on a standard size paper, except that nothing larger than 24 inches by 36 inches will be accepted. (Ord. 01-062 § 5).
19.90.030 Drafting standards.
In addition to the general standards listed above, the following information, including but not limited to plan, profile and cross section information, shall be included within the utility and transportation plans as appropriate:
A. Each submittal shall contain the following project information on the cover sheet or first sheet:
1. Title. Project name (add explanatory note if project name has changed).
2. Table of contents (if more than three sheets).
3. Vicinity map (scale sufficient to cover project limits on one sheet or one inch equals 200 feet, whichever is greater).
4. General description of site, including quarter section, township and range.
5. Name and phone number of architect/engineering firm preparing plans.
B. Existing Improvements and Topography. Show all existing underground and surface improvements and topography in proximity to the project. The information must be shown for the full width of the right-of-way or the easement and for a sufficient distance on either side of the right-of-way or easement to show possible impacts on adjacent properties and/or the relationship to related facilities. Information on existing surface and underground city facilities may be obtained from City Hall. For information regarding the location of underground utilities, call 509-683-1112. Other utility information may be obtained from the respective utility owners (i.e., Douglas County Public Utility District, U.S. West, etc.).
C. Sewer, Water and Drainage Improvements. Provide profiles of all proposed sewer, water and drain lines. Show existing underground improvements within 10 feet of where they cross or connect to the new improvements. Show the stormwater drainage discharge point to a public system or natural watercourse. Provide drainage system details whether or not detention of stormwater is required, including biofiltration swales.
D. Grades. All profiles and cross sections should show the proposed as well as the existing grade.
E. Infrastructure not within street right-of-way shall be within easements granted to city of Rock Island or to the responsible utility district in a form acceptable to the city or the utility. The easement widths will vary according to pipe diameter, but shall not be less than 15 feet wide for city maintained facilities. All easements shall be shown on plan sheets.
F. Label all manholes, clean outs and catch basins in sequential number. Label rim and invert elevations and catch basin and manhole size and type.
G. Include flow direction arrows on all gravity lines.
H. Label pipe size, length, material and slope.
I. Include datum and benchmark information on each plan and/or profile sheet.
J. Show spot elevations of pavement in parking lots, and runoff flow direction arrows.
K. Show roof leaders and footing drains connecting into conveyance system.
L. Show all stub-out locations for future connections.
M. Include section details for rockeries in grading/paving plans.
N. Show the following for all stormwater facilities:
1. Show and label at least two cross sections through detention pond. One cross section shall show the control structure.
2. Show location and detail of emergency overflows and spillways.
3. Provide invert elevations of all pipes, inlets, tanks, vaults and spot elevations of the pond bottom. Call out pond volume and dimensions, and design surface elevation.
4. Provide plan and section views and details of all rock protection and energy dissipaters.
5. Section and plan view on restrictor/control structure must be shown and adequately detailed, including size and elevation of orifices, overflow weirs, etc.
6. Show length, width, and bottom width dimensions for all biofiltration and water quality swales and stormwater conveyance swales. Include sectional view, showing side slopes and design depth of flow.
7. Include seeding material information.
O. When required, an erosion and sedimentation control plan (ESCP) shall provide all necessary details to illustrate how the plan is to be implemented (Ord. 01-062 § 5).