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a. Survey. All topographic surveys shall be based from an official benchmark acceptable to the City and be based on the NAVD 1988datum. Existing elevation benchmarks that are based on the NGVD 1929 datum shall utilize the appropriate conversion/actor to convert to the NAVD 1988 datum. All temporary benchmarks for construction purposes are to be based off accepted City benchmarks. Based on the NOAA VertCon website, the current conversion (for this area) from 1929 to 1988 datum is about 3.34 feet- see https://www.ngs.noaa.gov/cgi-bin/VERTCON/vert_con.prl for specific conversions by location.

Designs subject to a Public Works Permit shall be based off of a complete topographic survey, including but not limited to the following.

1) Surface features;

2) Subsurface features;

3) Existing utilities (public and private);

4) Property lines & all survey monuments within or adjacent to the limits of the required topographic survey;

5) Right-of-way lines & centerline monuments;

b. Drawing Submittal: The drawing submittal shall include the following as applicable unless otherwise approved by the Director. The following is a general overview of drawing requirements but is not intended to be exclusive. All requirements of the individual divisions of the standards shall be satisfied.

Since projects subject to a Public Works Construction Permit vary g in size and complexity, not all provisions in this section will apply to all projects. For instance, small projects in improved areas which not involving any street improvements or extensions of water, sewer or storm drain mainlines will not need to provide profiles for these facilities. To assist the design engineer, the minimum elements required of all designs subject to a Public Works construction permit are designated as summarized in the sentence below.

All elements not so designated are only required if the project involves improvements or infrastructure referenced in the non-designated paragraphs or sentences. If there are questions due to the unusual nature of a project, these should be discussed with the Director at the predesign conference (PWDS 1.9.b)

1) Construction drawings shall be submitted on 22" x 34" blackline sheets unless otherwise approved by the Director. All drawings submitted for review and/or approval shall be stapled and bound into sets.

2) Cover Sheet

3) Overall drainage, utility and street lighting plan.

4) Site grading plan where applicable.

5) Plan and profile for the following public utilities:

a) Streets;

b) Water as specified;

c) Sanitary sewers;

d) Storm drains;

6) Stamped storm report for drainage and detention calculations, including storm drainage basin maps. Stamped storm drain and detention calculations shall be referenced in the plans

7) Erosion control plan.

8) Standard notes shall be included on the construction drawings.

9) If not submitted in a plan review, a current title report including a list of all existing easements, restrictions, and other encumbrances on the property in question, including copies of any easements or other restrictive documents referenced in that report.

10) Drawings showing all offsite easements and ROW dedication required in conjunction with the project with the exception noted under PWDS 1.9.h.3 for subdivisions or partitions where all public utilities will be constructed prior to the recording of a final plat.

11) Proposed utility plans from all franchise utilities (final review).

12) Engineer's unit price construction cost estimate acceptable to the Director or unit price bid results (preliminary and final review). Cost estimates shall include line items for street lighting and franchise utility trenching & conduit as well as trenching & installation of street lighting conduits, junction boxes and pole bases.

13) The submittal may require a traffic study and a traffic control plan per Silverton Development Code.

14) Traffic Control Plan shall be sent to all respective jurisdictions

15) A written summary of all deviations from the PWDS requirements and written justification for any variance requests (see PWDS section 1.11). It is the responsibility of the design engineer to submit a written request for any proposed deviations or variances from City standards to the Director.

c. General.

1) A title block shall appear on each sheet of the drawing set placed in the lower right-hand comer of the sheet across the bottom edge of the sheet or across the right-hand edge of the sheet. The title block shall include the name of the project, the sheet title and number, the name of the engineering firm, engineer's stamp, date and revision blocks. Revision blocks shall be filled in on each drawing sheet containing revisions from previously submitted or reviewed drawings.

2) North arrows (true north and plan north where applicable) shall be shown on each sheet containing plan views and adjacent to any other drawing which is not oriented the same as other drawings on the sheet.

3) The scale shall be 1"=10', 20', 40' or 50' horizontal and 1"=2', 4' or 5' vertical for all drawings except structural or mechanical drawings. The scale of corresponding plan views and profiles shall be the same.

4) In cases where streets or public utilities exist or will be reconstructed, plan view scales shall not exceed 1" = 20'.

5) Each plan, profile and detail shall be labeled under the drawing. The scale for the plan, profile, or detail shall be noted under the title. Details not drawn to scale shall be so noted.

6) All detail drawings, including standard detail drawings, shall be included on the drawing sheets.

7) A complete legend of all symbols used shall be provided at the front of each drawing set or on the appropriate pages. In general, existing utilities shall be shown with a lighter line weight than proposed utilities.

8) Letter size shall not be smaller than 0.10-inch high.

d. Cover Sheet.

1) The first sheet (Cover Sheet) of all drawing sets shall include the following as a minimum:

a) Project name.

b) Design Engineer's name, address, telephone and fax number, and email address/website.

c) Developer's name, address and telephone number, and email address/website.

d) Vicinity Maps showing the location of the project in respect to the nearest major street intersection and a minimum of 500 feet around the site.

e) Legend including all symbols and line types used on the construction drawings.

f) General construction notes matching format and content of notes in Appendix B. Where there is insufficient room on the cover sheet, the notes can be included on a subsequent sheet.

g) Sheet index located near lower right comer.

h) Include a summary table listing the number of lineal feet of new streets and mainline utilities to be constructed. Do not include existing streets or utilities that are being replaced as part of the project with the same length. Do not include service laterals. Identify the length of new streets and/or utilities under County or ODOT jurisdiction separately from those under City jurisdiction.

i) The City Planning Department file or docket number shall be listed for projects which required land use approval.

e. Overall Drainage, Utility and Street Lighting Plan.

1) The overall drainage and utility plan shall show the following as a minimum:

a) The location and elevation of a National Geodetic Survey, United States Geological Survey, State Highway, Marion County or City of Silverton bench mark which the elevations shown are based shall be shown or noted. Temporary bench marks on or near the project site shall also be shown.

b) Right-of-way lines, property lines, easement lines (including those outside the project but intersecting or within 150 feet of the project boundaries).

(1) This distance can be reduced with written approval from the Director, but in all cases shall extend to the far side of right-of-ways and show property lines and improvements on the far side of the street along the entire property frontage, as well as showing enough of the adjacent properties to clearly illustrate drainage patterns, setbacks and utility issues.

c) Show (& list the recording reference numbers of) all existing easements affecting the property (on-site & off-site), and provide callouts with blanks for the proposed new easements (the recording references for proposed easements are to be inserted at the as-built stage).

d) Existing and proposed streets, curbs, sidewalks, handicap ramps and driveways within the project and within 150 feet of the project boundaries.

e) Existing and proposed sanitary sewers, storm drains, waterlines and appurtenances within the project and within 150 feet of the project boundaries.

f) Existing franchise and private utilities within the project and within 150 feet of the project boundaries.

g) Lot or parcel numbers, street names and other identifying labels (including tax lot and address numbers for all existing properties shown). New street names are subject to the approval of the Director.

h) Location and description of existing survey monuments, including but not limited to street monuments, property monuments, section comers, quarter comers and donation land claim comers within or adjacent to the limits of the work area.

i) Public and franchise/private utilities and other facilities to be relocated.

j) Street light and area light pole locations based on a photometric design acceptable to the City, subject to City location and maximum spacing standards.

k) Existing drainage patterns within the project and within 150 feet of the project boundaries.

l) Floodplain, floodway, and wetland boundaries including floodplain elevation with FEMA map reference.

f. Site Grading Plan.

1) A site grading plan is required for subdivisions, multi-family, commercial or industrial developments, and partitions involving street improvements or fills.

2) A site grading plan is required for projects subject to site design review, including all commercial, industrial, or multi-family developments.

3) The site grading plan shall show proposed finished grade and parcel comer elevations, with the existing and proposed contours shown at one (1) foot intervals and extended a minimum of 100 feet beyond the improvements.

4) The site grading plan shall show all drainage systems and proposed erosion control facilities.

5) Final site grade plan with finished floor elevation of main floor is required.

g. Plan Views.

1) General: Information required on the overall utility plan shall be shown on the plan views as applicable, including tax lot & address numbers of all existing lots or existing parcels shown. In addition, the following shall be shown:

a) Utilities and vegetation in conflict with the construction or operation of the street and public utilities. Vegetation to include trees greater than 6 inches in diameter and landscape plantings within the right-of-way and easement areas.

b) Public and franchise or private utilities to be relocated.

c) Match lines with sheet number references.

d) All existing survey monuments within or adjacent to work areas.

e) Additional information as outlined below or as required by the City based on unique or unusual features of the project.

2) Streets.

a) Street stationing shall be tied to existing property comers, centerline of intersections, and/or existing street monuments.

b) Location, alignment, and stationing of existing streets and proposed street centerline and curb faces. Location of all curbs, driveways, edge of pavement, sidewalks, etc. shall be dimensioned from right-of-way centerline, easement boundary or other means so that its location is clearly defined.

c) Bearing of all street centerlines.

d) Horizontal curve data of street centerline and curb returns, including stationing of point of tangency and point of curvature, length of tangent, length of centerline curve, delta angle, radius point, and centerline radius.

e) Location of existing and proposed street centerline monuments.

f) Centerline stationing of all intersecting streets.

g) Curb return plan view details (scale not to exceed 1" = 10', with all running slopes & cross slopes of sidewalks, pedestrian ramps & landings labeled) and separate curb return profiles (showing gutter grades) for all curb returns with pedestrian ramps, to demonstrate compliance with PROWAG requirements. Where centerline street grades and cross slope street grades of both intersecting streets is less than 1% (including through the entire intersection), the Director may allow plans to show only top of curb elevations along curb returns at quarter­ points on the curb return detail views.

h) Location of the low points of street grades and curb returns.

Crown lines along portions of streets transitioning from one typical section to another.

i) Location, alignment & dimensions of all street frontage sidewalks, including sidewalks to be constructed with the project and sidewalks which are deferred to a future date. Sidewalks to be constructed with the project and those deferred to the future shall be clearly designated, and all required sidewalk easements shown & labeled.

j) For residential projects or multi-tenant commercial projects, the location of CBU mailboxes shall be shown (location must be acceptable to the local postmaster), and the ADA access path to the CBU mailboxes must be designated per OSSC 1111, with a note designating that the CBU and the required ADA access path to the CBU must be constructed prior to City acceptance of the street improvements.

l) Partial street improvements must be based on a full street design (i.e. provide full design as if the entire street were being constructed as part of project, including design of sidewalks & driveway approaches, etc. on both sides), with the portion actually to be constructed as part of the project being clearly designated on the plans.

m) For all streets which are anticipated to experience significant truck traffic (as determined by the Director), and for driveways or access points which will accommodate truck traffic, wheel path templates shall be included on the drawings to demonstrate that the proposed improvements allow vehicular turning movements without encroaching onto sidewalks or crossing curbs outside of the defined driveway or vehicular access path.

3) Storm Drains.

a) Location, stationing, size, and material of existing and proposed storm drains and appurtenances. Show drainage facilities upstream and downstream of the project as required to illustrate conditions affecting the design.

b) Drainage facilities located outside of public right-of-ways shall be stationed from the downstream end. For all manholes, catch basins, etc., located in or adjacent to streets, drainage facility stationing shall correspond to the street stationing.

c) Mainline stationing of all service tees.

d) Location of all manholes, cleanouts, junction boxes, pipelines, ditches, etc. shall be dimensioned from right-of-way centerline, easement boundary or other means so that its location is clearly defined.

e) All manholes and other structures shall be numbered and stationed to facilitate checking the plan views with the profile.

f) Alignment, size and depth at property line or easement line of proposed storm drain laterals.

4) Sanitary Sewer.

a) Location, stationing and size of existing and proposed sanitary sewers and appurtenances.

b) All sanitary sewers shall be stationed from downstream manholes to upstream manholes.

c) Location of all manholes, cleanouts, pipelines, ditches, etc. shall be dimensioned from right-of-way centerline, easement boundary or other means so that its location is clearly defined.

d) Mainline stationing of all service tees.

e) All manholes, cleanouts and other structures shall be numbered and stationed to facilitate checking the plan views with the profile.

f) Existing City manholes numbers shall be used for all existing manholes or mainline cleanouts shown. Following acceptance by the City, each new sanitary sewer manhole and new mainline cleanout shall be identified on the as-builts with a number provided by the City.

g) The following information shall be provided for all sanitary sewer service laterals.

(1) Mainline stationing and material

(2) Alignment

(3) Size

(4) Length of service lateral

(5) Depth at property line or easement line

(6) Distance ties to property comers

(7) Location of property line cleanout.

5) Water Distribution.

a) Location, stationing, size, and material of existing and proposed water mains and appurtenances.

b) Each valve and fire hydrant shall be identified and stationed to facilitate checking the plan views with the profile.

c) Location of all waterlines and hydrants shall be dimensioned from right-of-way centerline, easement boundary or other means so that its location is clearly defined.

d) Waterline stationing shall be independent of the street stationing.

h. Profile Views.

1) General: Profile views shall conform to the requirements and show the information outlined under this section as applicable:

a) Profile views shall be to the same horizontal scale and on the same sheet as the corresponding plan view.

b) Match lines with sheet number references.

2) Streets.

a) Original ground & finish grade profile along the centerline and curbs as appropriate. For off-set or super-elevation cross-sections, both curbs shall be profiled. Ditch invert profiles shall be shown where curbs are not to be constructed. Profiles at intersections or cul-de-sacs shall be extended to the back of the far side PUE as a minimum, and to the top/bottom of cut or fill slopes where applicable.

b) Stationing, elevations and percent slopes for centerline and/or top of curb profiles.

c) Beginning point of all vertical curves, points of vertical intersection, end of vertical curve, length of vertical curve, K-value and design speed, and low point of vertical curve if a sag curve.

d) Projection of the profile of streets that may be extended or reconstructed in the future. The projected profile shall extend a minimum of 200 feet beyond the proposed work limits. The City may require profiles to be extended further where necessary due to topography or to demonstrate ability to tie to existing streets. Projected profiles shall be designed to be compatible with the restraints of the terrain.

e) The top of curb profiles for all cul-de-sacs, including vertical curves for any grade changes exceeding 1%, with a K-value not less than three (3).

f) Separate curb return profiles (showing gutter grades) for intersection curb returns in accordance with requirements under PWDS 1.10.g.2.g. The location of all pedestrian ramps shall be indicated and labeled on the curb return profiles.

g) Unless otherwise approved or required by the City, cross sections showing existing and proposed finish grade shall be shown at 25 foot intervals to demonstrate that the proposed street grades match the surrounding grades and address drainage concerns, as well as to determine the need for slope easements, as well as at existing driveways or other access ways. Unless otherwise approved by the Director in existing developed areas, the cross sections shall extend a minimum of 50 feet beyond the right-of-way line where existing cross slopes are less than five percent (<5%) and a minimum of 25 feet beyond the right-of-way line where existing cross slopes are greater than five percent (>5%).

h) Profiles for partial street improvements shall include information for both the turnpike construction (including ditch profiles as applicable), as well as future street profiles, including cross section profiles.

3) Storm Drain.

a) Profile of existing and proposed ground surface along centerline of pipe and pipeline, with rim and pipe inverts at each manhole, catch basin, etc., and the hydraulic grade line (HGL) as supported by the drainage study.

b) Manholes and other appurtenances shall be numbered and stationed to match the corresponding plan view.

c) Size, slope, pipe material and class, length of storm pipe and class of backfill between consecutive manholes, catch basins, junction boxes or cleanouts.

d) All existing or proposed public and franchise or private utilities crossing the profile and any existing utilities which potentially are in conflict with construction of the improvements.

e) Existing drainage facilities, including offsite facilities upstream and downstream which affect the design (i.e. size and capacity of upstream and downstream system).

f) Profiles for ditch and creek flow lines shall be extended as appropriate to illustrate conditions affecting the design beyond the project, both upstream and downstream. Typical cross sections shall also be shown.

g) Where mainline storm cleanouts are approved for storm lines which will be extended in the future, plan and profile showing the alignment and depth of the anticipated future extension from the proposed cleanout to the next manhole or catch basin shall be included (without mainline grade breaks between structures).

4) Sanitary Sewer.

a) Profile of existing and proposed ground surface along centerline of pipe and pipeline, with rim and pipe inverts at each manhole.

b) Manholes and other appurtenances shall be numbered and stationed to match the corresponding plan view.

c) Size, slope, pipe material and class, length of sewer and class of backfill between consecutive manholes.

d) All existing or proposed public and franchise or private utilities crossing the profile and any existing utilities which potentially are in conflict with construction of the improvements.

e) Where mainline sewer cleanouts are approved (PWDS 4.16.b.1), plan and profile showing the alignment and depth of the anticipated future extension from the proposed cleanout to the next manhole shall be included (without mainline grade breaks between manholes).

5) Water Distribution.

a) Waterline profiles shall be provided for all waterlines within existing right-of-ways or along alignments paralleled (within 15 feet) or crossed by existing public utilities. Waterline profiles will not be required for new waterlines within new right-of-ways unless required to prevent conflicts with proposed utilities. All water lines 12” or greater shall be profiled.

b) Profile of existing and proposed ground surface along centerline of pipe and pipeline, as well as existing and proposed pavement surface of adjacent streets (where applicable).

c) Location of valves, fittings, fire hydrants and other appurtenances with all valves and fire hydrants numbered and stationed to match the corresponding plan view.

d) Size, pipe material and class, depth of cover and class of backfill and surface restoration.

e) All existing public and private utilities crossing the profile and any existing utilities which potentially are in conflict with construction of the improvements.

j. Drainage Calculations.

1) A summary of the drainage calculations including basin maps shall be presented in a clear, concise and complete manner on the site grading or drainage plan sheets. These calculations shall address all runoff into the drainage system and downstream capacity. If required by the City, areas contributing flow to each inlet must be computed separately and each inlet with contributing area shall be designated and shown on an accompanying contour map work sheet.

k. Easements.

1) All recorded easement documents shall include an exhibit map in addition to the legal description of the easement area (except for easements created by a plat, in which case the recorded easement documents may reference the easement as shown on the plat).

2) Easements shall include minimum ten (10) foot public utility easements (PUE) for :franchise utilities along all lot lines :fronting public or private streets, as well as easements for sidewalks, utility vaults, light poles, mail boxes, meter boxes, fire hydrants, lateral clean-outs, etc. that are not within the public right-of­ way. Since new right-of-ways typically result in the back of sidewalk being close to the right-of-way line, PUEs shall include wording that they are a "utility easement", a "public sidewalk easement", as well as a "waterline, sanitary sewer and storm drain easement to the City of Silverton."

3) Unless otherwise approved by the Director, private utility easements a minimum often (10) feet wide (centered on the utility pipe) shall be provided for all private water, sanitary sewer and storm drains outside of public right-of-ways or outside the boundaries of the property being served.

4) Recorded copies of all required easements shall be submitted prior to start of construction, with the exception noted under PWDS 1.9.i.3 for subdivisions or partitions where all public utilities will be constructed prior to the recording of a final plat.

l. Projects under plan review by the City that go six months or more w/o activity may be required to submit a new project permit application and pay the subsequent plan review fee.