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no edit summary
==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;
# 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;
# 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;