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− | ==Floodplain Mapping and Documentation Minimum Requirements== | + | The following, comprehensive list is presented as a basis for discussion between regulatory authorities and design practitioners. |
| + | {{TOClimit|2}} |
| + | ==Site Description== |
| + | * Location (key plan, municipal address, nearest roads, watershed and subwatershed); |
| + | * Existing Conditions (land use on site and surrounding areas); |
| + | * Natural Heritage features; |
| + | * Proposed Conditions; |
| + | * Drainage Area (for the site, tributary and watershed); |
| + | * Watercourses, wetlands present on site, and type (permanent or intermittent); |
| + | * Drainage patterns and ultimate drainage location/outfall; |
| + | ==Background Information== |
| + | * Pre-submission meeting verification; |
| + | * Reports from pre-consultation with MOECP and other agencies (especially related LID credits); |
| + | * Watershed plans; |
| + | * Sub-Watershed plans; |
| + | * Master drainage plans (MDPs); |
| + | * Other previous reports and relevant SWM requirements; |
| + | * Existing models; |
| + | * Geotechnical report; |
| + | * Hydrogeological report; |
| + | ==Figures and drawings== |
| + | * Location plan in the report; |
| + | * Key plan on the drawings; |
| + | * All watercourses and names of watercourses shown on all figures and drawings; |
| + | * Pre-development and post-development drainage plans for hydrologic model(s) which include: |
| + | **Existing contours; |
| + | **Drainage direction (minor and major system); |
| + | **Catchments ID's; |
| + | **Areas and imperviousness; |
| + | **Uncontrolled areas; |
| + | **100 year capture; |
| + | **Site outlets; and |
| + | **LID facility location and associated tributary areas; |
| + | * Model schematics; |
| + | * Storm drainage, [[grading]] and general servicing plans; |
| + | * LID practice design [[drawings]] and details; |
| + | * [https://sustainabletechnologies.ca/home/erosion-and-sediment-control/ Erosion and sediment control plans]; |
| + | |
| + | {| class="wikitable sortable" |
| + | ! Parameter |
| + | ! Plan |
| + | ! Detail |
| + | ! Profile |
| + | ! Description |
| + | |- |
| + | | Location |
| + | | x |
| + | | |
| + | | |
| + | | Area extent shown on plan view (bump-outs, municipal reserves, private lots, parks) |
| + | |- |
| + | | Surface area |
| + | | x |
| + | | |
| + | | |
| + | | Outlined on plan view drawings and stated in report |
| + | |- |
| + | | Inlet |
| + | | x |
| + | | x |
| + | | |
| + | | shown on plan view and typical details provided ([[curb cuts]], [[level spreader|flow spreader]], ribbon curb) |
| + | |- |
| + | | Materials |
| + | | |
| + | | x |
| + | | |
| + | | Materials specs (soil, drainage layer), depth, hydraulic conductivity, porosity |
| + | |- |
| + | | Vegetation |
| + | | x |
| + | | x |
| + | | |
| + | | Planting plan and [[vegetation]] details (species, mature density, succession plan) |
| + | |- |
| + | | Outlet |
| + | | x |
| + | | x |
| + | | x |
| + | | [[Underdrain]] spec and slope, spill elevation, catch basin type and grate, [[weir]] type and location, [[inlet]] control device details |
| + | |- |
| + | | Catchment |
| + | | x |
| + | | |
| + | | |
| + | | Delineated catchment area directed to [[bioretention]] facility |
| + | |- |
| + | | Subsurface materials |
| + | | |
| + | | x |
| + | | |
| + | | Layer order (filter, [[reservoir aggregate|reservoir]], [[choker course]], [[geotextiles]] (if using)) and specifications (gradation, hydraulic conductivity, void space) |
| + | |- |
| + | | Depth |
| + | | |
| + | | x |
| + | | x |
| + | | Depth of each layer, reservoir retention depth (if applicable), surface ponding depth (if applicable) |
| + | |- |
| + | | Slope |
| + | | |
| + | | x |
| + | | x |
| + | | Sub-base slope and surface slope |
| + | |- |
| + | | Flow Arrows |
| + | | |
| + | | x |
| + | | |
| + | | From contributing area and overflow route |
| + | |- |
| + | | Water depth |
| + | | |
| + | | x |
| + | | |
| + | | Ponding depth and water surface elevation during design storm and maximum prior to [[overflow]] |
| + | |- |
| + | | Inundation |
| + | | |
| + | | x |
| + | | |
| + | | Extent of of inundation during design storms |
| + | |- |
| + | | Erosion control |
| + | | x |
| + | | x |
| + | | |
| + | | Located at inlet, outlet if overland spill |
| + | |} |
| + | |
| + | ==Design Information== |
| + | * Consistent hydrology modelling to be utilized for each development application and/or consistent with MESP/MSP/Studies. |
| + | * Supporting information has been included for all modelling parameters and calculations. |
| + | *Stage-Storage-Discharge calculations provided for each LID facility including design information on control and emergency overflow weirs. |
| + | *Flow and storage summary tables provided which reference the associated drainage area, catchment ID, outlet(s) and differentiate between controlled and uncontrolled areas. |
| + | *Identify and show seasonal high groundwater levels in report and on drawings; |
| + | *Per [https://www.ontario.ca/document/stormwater-management-planning-and-design-manual-0 MOECC SWM manual, 2003] (i.e. Drainage area, required volume, slopes, forebay, etc.); |
| + | *The SWM report and drawings are to include a table summarizing required storage, provided storage and associated elevation and flow for the permanent pool, 25mm (extended detention), and 2 through 100 year return period storm events where applicable for each facility; |
| + | *An operations and maintenance manual (includings a maintenance schedule) should be included in the SWM Report for all LID facilities in accordance with municipal requirements; |
| + | *Complete information on proposed manufactured treatment devices is to be provided including current status under [[Pretreatment#Concentrated underground flow|ETV protocols]]; |
| + | ===Quantity control=== |
| + | *Runoff coefficient or imperviousness calculations; |
| + | *Analysis using appropriate storm distributions; |
| + | *Pre-development peak flow (m³/s); |
| + | *Post-development uncontrolled peak flow (m³/s); |
| + | *Post-development controlled peak flow (m³/s); |
| + | *LID Facility Type; |
| + | *Stage – Storage – Discharge Table; |
| + | *Outlet design and calculations; |
| + | *Total storage required (m<sup>3</sup>); |
| + | *Total storage provided (m<sup>3</sup>); |
| + | *Table comparing provided versus required; |
| + | *Overland flow conveyance and design; |
| + | *External drainage conveyance (100 year and Regional); |
| + | ===Quality control=== |
| + | *Level of protection; |
| + | *Drainage area to facility in hectares; |
| + | *Percentage impervious – total and directly connected areas; |
| + | *SWM facility monitoring and maintenance requirements; |
| + | |
| + | ==Hazard land management== |
| + | *Regional event and 1:100 year flood lines under existing and proposed conditions shown on appropriate plan drawings; |
| + | *Valley top of bank, stream erosion, steep slope allowances and meanderbelt assessed (confined stream systems only); |
| + | *Wetlands and required setbacks determined and identified on plans; |
| + | *Meanderbelt assessment and/or setback determined and identified on plans; |
| + | *Wave uprush and/or wind setup elevations calculated; |
| + | *“Limit of development” shown on plans; |
| + | *Survey and floodplain mapping submitted (see below); |
| + | *Hydraulic modelling and analysis including digital files; |
| + | ==Other== |
| + | *Upon approval of the SWM design, a digital copy of the stormwater drainage plan is to be submitted including the location and size of the SWM facility in GIS format; |
| + | ---- |
| + | ===Floodplain mapping and documentation minimum requirements=== |
| # Hydraulic sections with regulated floodplain elevations and cross-section identification; | | # Hydraulic sections with regulated floodplain elevations and cross-section identification; |
| # Existing and proposed floodplain delineation; | | # Existing and proposed floodplain delineation; |
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| # Natural features such as watercourses and wetlands; | | # Natural features such as watercourses and wetlands; |
| # Floodplain mapping and supporting documentation signed and stamped by a P.Eng. | | # Floodplain mapping and supporting documentation signed and stamped by a P.Eng. |
− | ==Survey Documentation Minimum Requirements== | + | ===Survey documentation minimum requirements=== |
| For any submission which contains drawings or figures that present survey information, the following list of minimum requirements must be included: | | For any submission which contains drawings or figures that present survey information, the following list of minimum requirements must be included: |
| # Document with text descriptor identifying overall approach and methodology; | | # Document with text descriptor identifying overall approach and methodology; |
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| # Digital copy of the survey data when applicable; and | | # Digital copy of the survey data when applicable; and |
| # Submission components to be stamped and signed by an OLS, P.Eng. or C.E.T. as relevant. | | # Submission components to be stamped and signed by an OLS, P.Eng. or C.E.T. as relevant. |
− | ==Geospatial Data Submission Minimum Requirements== | + | |
| + | ===Geospatial data submission minimum requirements=== |
| For a submission which contain drawings, figures, reports, modelling and / or memos that present geospatial information and its analysis; the following list of minimum requirements must be included: | | For a submission which contain drawings, figures, reports, modelling and / or memos that present geospatial information and its analysis; the following list of minimum requirements must be included: |
| # Text summary identifying methodology and software used in geospatial analysis; | | # Text summary identifying methodology and software used in geospatial analysis; |