Stormwater Management Report

Stormwater Management Report Services | ELMID Design Inc.

Elmid Design Inc. offers stormwater management report services for land development projects. Our experienced team of professionals can provide comprehensive reports that meet all regulatory requirements and exceed your expectations.

Stormwater Management Report Services

A stormwater management report explains how a project will manage rain and melted snow. It reviews how development may change runoff across a property. Therefore, the report helps the project team plan safe drainage and meet local review needs.

Elmid Design Inc. prepares stormwater management reports for residential, commercial, and land development projects across Toronto and the GTA. In addition, our team coordinates the report with grading, servicing, and site plan drawings.

When May You Need a Stormwater Management Report?

A municipality may request a stormwater management report when development changes the land, buildings, hard surfaces, or drainage system. However, the exact requirements depend on the location and project size.

For example, a report may be needed for:

• A new residential development

• A commercial or industrial project

• A site plan application

• A subdivision project

• A new building or large addition

• A parking area or driveway expansion

• A change to the existing drainage system

• A site with known drainage limits

• A project near a watercourse or regulated area

First, our team reviews the project information. Then, we can explain which drawings, studies, and calculations may be required.

What Does a Stormwater Management Report Include?

Each project has different design needs. Still, a typical report may include:

• A description of the existing site

• A summary of the proposed development

• Existing and proposed drainage areas

• Runoff flow calculations

• Stormwater storage needs

• Major and minor drainage routes

• Water balance measures

• Water quality measures

• Proposed outlet and release controls

• Low Impact Development options

• Erosion and sediment control measures

• Supporting plans and design details

In addition, the report may include computer models, design charts, and supporting calculations. The required level of detail depends on the project and reviewing authority.

Main Stormwater Design Goals

Manage Runoff Flow

Development can add roofs, pavement, and other hard surfaces. As a result, more water may leave the site during a storm. The design may use storage and flow controls to manage this change.

Protect Water Quality

Stormwater can carry sediment and other material from roads, parking areas, and construction sites. Therefore, the design may include measures that help improve water quality before discharge.

Support Water Balance

Some projects need measures that allow water to soak into the ground or remain on the site. For example, the design may consider infiltration areas, rain gardens, or other site features.

Provide Safe Drainage Routes

A clear drainage route helps direct water away from buildings and other sensitive areas. In addition, the design considers how larger storms may move across the property.

Stormwater Management Design Options

The best solution depends on the site, soil, available space, and municipal criteria. Therefore, the final design may use one or more measures.

Possible options include:

• Underground storage tanks

• Oversized storm pipes

• Rooftop storage

• Surface storage areas

• Detention or retention facilities

• Flow-control devices

• Infiltration trenches

• Soakaway pits or dry wells

• Permeable pavement

• Rain gardens and bioswales

• Oil and grit separators

• Grassed swales

However, not every option works on every property. Our team reviews the site conditions before selecting suitable measures.

Our Stormwater Management Process

Review the Project

First, we review the survey, site plan, grading plan, servicing information, and proposed development. We also check available municipal comments and design criteria.

Study Existing Drainage

Next, we identify existing drainage areas, outlet locations, ground slopes, and nearby site limits. This step helps us understand how water currently moves through the property.

Prepare the Design

Then, we develop the proposed drainage approach and complete the required calculations. We also coordinate storage, flow controls, grading, and service connections.

Prepare the Report and Drawings

After that, we present the design in a clear report with supporting plans and calculations. The report explains the main design goals and proposed stormwater measures.

Support the Review Process

Finally, the municipality or reviewing authority may provide comments. When needed, Elmid Design Inc. can respond to comments and update its documents within the agreed project scope.

Information We May Need

The required information depends on the project. However, the following items can help our team begin:

• The property address

• A current topographic survey

• The proposed site plan

• Building and parking layouts

• Grading and servicing drawings

• Landscape information

• Soil or groundwater information

• Existing drainage records

• Municipal review comments

• Previous reports or approved plans

First, send us the information you already have. Then, our team can identify any missing documents.

Stormwater Reports Across Toronto and the GTA

Elmid Design Inc. prepares stormwater management reports for projects in Toronto, Vaughan, Richmond Hill, Markham, Mississauga, Brampton, Oakville, and other Ontario municipalities.

However, each municipality may use different targets, methods, and submission standards. Therefore, we prepare each report based on the project location and current review requirements.

Related Engineering Services

Stormwater design often connects with other civil engineering work. Therefore, Elmid Design Inc. also provides:

• Site grading plans

• Site servicing plans

• Functional servicing reports

• Erosion and sediment control plans

• Site plan drawings

• Drainage plans

In addition, we can coordinate these documents when the project scope requires them.

Frequently Asked Questions

What Is a Stormwater Management Report?

A stormwater management report explains how a development will control runoff flow, water quality, water balance, and drainage routes. It also includes the calculations and design details that support the proposed approach.

How Much Does a Stormwater Management Report Cost?

The cost depends on the project size, site conditions, available information, and required design work. Therefore, we review the project details before providing a quote.

How Long Does the Report Take?

The design time depends on the project and the information available. In addition, municipal review time and requests for more information may affect the overall schedule.

Does Every Project Need a Stormwater Report?

No. Smaller projects may only need a grading or drainage plan. However, the municipality or reviewing authority decides what documents are required for each application.

Does Elmid Design Inc. Build Stormwater Systems?

No. Elmid Design Inc. provides engineering design, reports, drawings, and review support. We do not provide excavation, construction, landscaping, paving, or installation services.

Discuss Your Stormwater Project

Do you need a stormwater management report for a development or municipal application? Contact Elmid Design Inc. and share your project information. Then, our team can review the scope and explain the next steps.