Give runoff a considered path.
New roofs, patios, and driveways can change how water moves across a property. YCG evaluates the existing and proposed site conditions and coordinates stormwater measures with grading, utilities, and landscaping.
Project support can include
- Drainage-area review and runoff calculations.
- Planning for runoff collection, conveyance, and management.
- Stormwater treatment and storage evaluation where required.
- Coordination of drainage features with site grading and available space.
- Erosion and sediment control plans.
- Storm Water Pollution Prevention Plan (SWPPP) support where applicable.
- Responses to drainage and stormwater review comments.
Choose measures that fit the property.
Soils, slopes, groundwater information, available space, and discharge options influence which measures are suitable. We coordinate with your design team and the relevant agency criteria rather than assume a particular system works everywhere.
Permanent drainage and construction controls.
A long-term drainage design and a construction erosion-control plan serve different purposes. The civil scope should identify both the completed site’s needs and any construction-phase documents required for the proposed work.
Start with the proposed changes.
Send the site address, survey, proposed roof and paving areas, soils information, and any drainage comments. These help us determine whether you need a focused calculation, a drainage report, plan revisions, or a wider stormwater scope.
Common questions
Is a drainage report the same as a SWPPP?
No. A drainage report generally evaluates runoff and drainage design. A SWPPP addresses construction-phase pollution prevention. The documents needed depend on the project and applicable requirements.
Can you help with an agency request for runoff calculations?
Yes. Send the actual comment and current plans so we can review the requested criteria and confirm the calculation and report scope.