SUBDIVISION PLAN REVIEW CHECKLIST

 

TOWN ADMINISTRATIVE SUBMISSION REQUIREMENTS:

 

o        Names and addresses of all abutters taken from town records not more than five days before filing.

 

o        8 prints of the plat.

 

o        1”=50’ scale.

 

o        3 reproducible mylars of each plat are required.

 

o            Approval for Subdivision issued by the New Hampshire Water Supply and Pollution Control Commission.

 

o        Mylar dimensions are: 17 x 22 inches, or 22 x 34 inches.

 

o        One mylar and two prints will be returned to the subdivider after the Board reaches a final decision on the proposed subdivision.

 

o            Proposed subdivision name or identifying title.

 

o        Name and address of the applicant and the owner, if other than the applicant.

 

o        Name, address and signature of engineer and/or surveyor.

 

o        Scale of drawing.

 

o        Title of drawing sheet.

 

o            WSPCC subdivision approval date and number

 

o        North arrow

 

o        Date of the plan

 

o        Name, license number and seal of the engineer and/or surveyor.

 

o        Names of abutting subdivisions, streets, easements, building lines, parks and public places, and similar facts regarding abutting properties.

 

o        Locus plan showing general location of the total tract within the town and the zoning district(s). Shall include all property lines of all adjacent lots and be shown in scale of 1”=400’.

 

o            Proposed use of each lot.

 

o            Boundaries of the entire parcel of property being subdivided and the location of all permanent monuments identified as to whether existing or proposed.

 

o            Location and profiles with elevations of existing and proposed water mains, sewers, culverts, drains and proposed connections or alternative means of providing water supply and disposal of sewage ad surface drainage.

 

o            Existing and proposed easements, right-of-way, driveways, and buildings or other structures.

 

o            Location of property lines, including entire undivided lot, lot area in square feel and acres, frontage on public rights-of-way, and building setback lines.  Each lot shall be numbered according to the Town tax map and lot numbering system.  Where wetland soils constitute any part of the lot, the plan shall show the total area, in square feet, of each lot and the total, in square feet, of non-wetland soil.  In addition, lot-sizing calculations are required by Section XIII-Bc&d.

 

o        An approval block in the lower left-hand corner and a title block in the lower right-hand corner of each sheet.  The approval block and the title block shall be drawn in accordance with those shown in Appendix A of these regulations.

 

o        Water courses, ponds, standing water, rock ledges, stone walls and other natural features; existing and proposed foliage lines; and open space to be preserved.

 

o            Existing and proposed streets with names, classification, travel surface widths and right-of-way widths.

 

o            Sufficient data to determine the location, bearing the length of every street line, right-of-way line, lot line, easement line and public area line and to permit the reproduction of such lines upon the ground.

 

o        All dimensions shall be shown to the nearest hundredth of a foot and all bearings to the nearest half-minute in arc. 

 

o        The error in closure of the field survey and the final plans shall not exceed 1 in 10,000.

 

o        Final road plan and profiles, and stationing every fifty feet with appropriate curve information, to include the following:

           

            o            A Plan View

                        o            Drawn to scale as 1”=50’ Showing:

                        o            Boundaries of proposed streets and proposed bounds.

                        o            Location of all existing and proposed bounds.

o   Boundaries of all drainage and pedestrian easements.

o   Location, elevation and description of at least two benchmarks per plan view

o   Horizontal location of all drainage structures and required curbing

                       

o               A Profile View

o   Drawn to 1”=50’

o   Existing and proposed center-line profiles of all streets, street stubs, culverts, catch basins and other drainage structures.

o   Size, slope and type of all drainage piping.

o   Rim and invert elevations of all catch basins, culverts, headers and other drainage structures.

 

o  If any part of the proposed development falls within the one-hundred-flood zone, as defined by the Federal Emergency Management Agency, the location of the flood zone must be shown on the plan of development showing the flood zone, the floodway and the floodplain.

 

o  On any lot where an underground storage tank is existing or proposed, said tank must be shown on the plan with a note explaining present or proposed use, size and material content.

           

o   Driveway location and designs shall be shown on the plans for every lot proposed.

 

o  Source of soils information.

 

o   Economic, traffic, and environmental impact studies shall be provided for all subdivision containing 10 or more lots.

 

GENERAL

 

o  Title block complete.

 

o        North arrow and scale on all plan view sheets.

 

o        Proper cross reference is made between plan and detail sheets.

 

o   Grading and drainage has been coordinated with adjacent properties.

 

o        Check to make sure that all right-of-ways and easements are shown, including flowage easements (min width = 20’)

 

o        Show block and lot numbers, also identify tracts, parks, waterways, street names.

o        Show all property dimensions.

o            Roadway and/or driveway alignment is complete.

o        Two benchmarks per plan view.

o               Label existing information to remain, be removed, abandoned, etc.

o               Sheets 22” x 34”

o  Scale shown both in feet & graphically.

o  Is the elevation related to the U.S.G.S.

o  X-sections 5 or 10 scale w 1:1ratio, if required

o  P.E. stamps on plans & calcs.

o  Match lines properly marked on plans.

o  Is lighting plan or note included?

o   Handicap ramp provided at sidewalks.

o  Note: “All work to conform to NHDOT Standard Specifications”

o  Are construction notes appropriate?

o  72-hour Dig Safe notice.

o  “Site Specific” approval?

o   Wetlands approval? Is the wet area marked properly?

o   Subdivision plan checked by LLS.

o  Square footage of lot(s) shown.

o  Is a review by the Traffic Department warranted?

o   Attorney General approval is required for subdivisions greater than 15 lots or condominiums greater than 10 units.

 

ROADWAY:

 

o        Show elevations at all inlets.

 

o            Existing topo is shown, including contours at two-foot intervals.

 

o   Proposed grades are shown.  Make sure that they are at or above flood criteria.

 

o        Check that vertical curves are shown when street grade has a difference of over 1%.

 

o        Show elevations at all low points, high points, break in grade, and intersections.  Also, show distance and slope between points.

 

o            Roadways, driveways, bike paths, walkways are shown.

 

o        Check that proper typical street section applies to road right-of-way.

 

o  If applicable, check that proposed grade lines are properly shown.

 

o        Check that finished floor elevation meet government requirements, building codes, and yard drainage.

 

o   Minimum grade > 0.5%

 

o            Maximum grade < 10%

 

o        2% maximum slope for 100’ approach to intersections connecting to 3% maximum grade.

 

o            Intersection angle between 70 to 90 degrees.

 

o        Sight distances adequate at existing street intersections (See AASHTO – Roadways, State of NH – Driveways) minimum 400’ all season safe sight distance.

 

o        K(min) – crest = 30, sag = 40

 

o            Minimum curve radius 200’

 

o            Minimum intersection radius 25’

 

o        Check cross-sections at existing intersections for conflicts.

 

o        Cul-de-sac or temporary turnaround details shown.

 

o        Are guard rails warranted?

 

o        7” curb reveal shown on granite curb

 

o        5” x 18” granite curb shown.

 

o        Note re: pavement shall be applied to all driveways within the ROW.

 

o        Vertical and Horizontal alignments shown.

 

o        Gutter line grades at transitions to existing pavement & where the normal required x-slope changes.

 

o        If there is a change in existing road grade, then profiles are needed for drives. Check for proper access.

 

o        If road > 500 LF, x-sections showing limits of cuts & fills shall be shown.

 

o        Typical roadway shown.

 

o        Typical driveway shown.

 

o        Cut and fill limits noted on the plan.

 

o        Curb detail, curb line & limits of curb noted.

 

o        Limits of construction & off-site improvements (if required) shown.

 

o            Sidewalk details and limits of construction.

 

o        Does roadway dam up any existing swales?

 

o        Cul-de-sacs less than 560’

 

DRAINAGE:

 

o   Primary drainage corresponds with drainage master plan of the area.

 

o            Direction of runoff is shown.

 

o        All low points have provisions for drainage disposal.

 

o        Label all pipes and show in pipe schedule (if one is used) the following:

 

o                Pipe size

o                Pipe material

o                Length of pipe

o                Headwalls, if needed

o                Flow at  peak if pipe schedule is used

o                Inverts, in and out

 

o        Check that pipe inverts and swale bottom elevations are coordinated.

 

o        Check for conflicts between drainage system and other utilities (water and sewer)

 

o        Proper cover provided on pipes.

 

o        Identify types of inlets.

 

o        Identify type of grates.

 

o        N = 0.015, Vmax = 10 fps w/o special provisions.  Vmin = 2.5 fps flowing 1/3 full.

 

o        RCP Class IV under roadways and Class V or Dip if < 4’ of cover.

 

o        RCP Class III cross-country.

           

o        4’ minimum cover.

 

o        15’ minimum diameter.

 

o                  Minimum slopes:  12”-.00060,  15”-.0045,  18”-.0035,  24”-.0021,  30”-.0018.  36”-.0014; v=2.5 fps when 1/3 full & n=0.015 to 0.5 for swales except level spreaders.

 

o        CB’s spaced at maximum of 300’ & at intersections, change in alignment, grade or size, low points.

 

o            Intercept drainage upstream of intersect.

 

o        Where does outflow from site go? Is flow outletted through a headwall? Is off-site sturdy warranted Are there any adverse affects? Is the swale < 400’ long?

 

o        All profiles and plans shown.

 

o        Check for conflicts w/ utilities.

 

o        Check details for CB’s, DMH’s & HW’s.

 

o            Drainage Calculations:

 

            o            Narrative Provided.

            o            All inflow to site accounted for.

            o   Inflow including off-site areas.      

 

o        Runoff boundaries shown.

 

o        Area labels with: area, C & Q

 

o        Check topography around structures, particularly headwalls of end sections.

 

o        Size, slope & materials of runs shown

 

o        Check details on ditches & swales.

 

o            Drainage designed for 25-yr storm for main lines and culverts, 10-yr for laterals.

 

o        Gasket joints specified for pipe.

 

o        Riprap properly-sized at the outfall(s).

 

o            Elevation drop through the invert > 0.2’.

 

o        Pipe slopes to be accurate.

 

o        Is the swale size and treatment sufficient for the proposed velocity?

 

DETAIL SHEET:

 

o            Complete title block.

 

o        Check all standard details and complete by adding any particular information which may be needed.

 

o        Detail titles and identifications are correct.

 

o        Proper cross reference is provided between plan and detail sheet.

 

o        Check general notes for completeness and spelling.

 

o        Typical roadway and/or driveway sections if different from community engineering standard.

 

o            Pavement design

 

            o            Surface course, type and thickness

            o            Base course, type and thickness

            o            Sub-base stabilization

 

o            Pavement slopes

 

o            Pavement width

 

o            Sidewalks

 

o        Curbs and gutters

 

o        Swales

 

o            Property lines

           

o        All features properly dimensioned.

 

o        Typical grading details if used.

 

            o            Lot grading

            o            Cul-de-sac grading

            o            Green acres

            o            Block grading

 

o        Show section for waterway, lake, ditch, retention basin, etc.

 

            o            Maximum side slopes

            o            Grading up to the property line

            o            Right-of-ways

 

o        Detail all drainage structures and systems which are not part of community engineering standards.

 

            o            Inlets

            o            Grates

            o            French drains

            o            Soakage pit

            o            Slab covered trench

            o            Control structures (weirs, culverts, etc.)

 

o        Check headwall size required to make sure that the area around the structure has been graded properly.

 

o            Provide details of erosion protection systems if required.

 

o            Topographic data, including 150 feet beyond property.

 

o            Building floor elevation and other important elevations.

 

o            Electrical and telephone lines, including pole locations, servicing, locating on or adjacent to the property.

 

o        Outline perimeter of heavily wooded areas.

 

o            Location and site of solitary trees with 6 in. and larger diameter trunk.

 

o        Mean elevations and limits of standing or flowing water.

 

o        Limits of 100-year flood elevation or note, if 100-uear flood does not encroach.

 

o        Identify of flood information source.

 

o        Date of survey

 

o   Certification by surveyor.

 

o            Caption giving property location (local, legal, land subdivision, municipality, County, State).

 

o        Tie to established reference point.

 

o        Parcel  traversed in clockwise direction.

 

o        Type corner markers found and set indicated

 

o            Courses shown if degrees, minutes, and seconds east or west of a north/south line.

 

o            Traverse closed

 

o            Contiguous property owners indicated

 

o        Curve data shown (points at curvature, tangency, and compound curvature; radii; central angle; and length and bearings of long chord).

 

o            Easement descriptions

 

o        Plat scale (1”=50’)

           

o        Date of survey and plat.