Please read these requirements before submitting your application. You will need to send the necessary detail with your application (where applicable). We will then make a full technical assessment. It will take up to two months. If you have questions about your submission you can email us at Floodriskmanagement@manchester.gov.uk.
1.0 Plans and Sections requirements
We will need plans and drawings from a competent engineer or surveyor. These must show Ordnance Datum Newlyn (the height above sea level). After you submit your application, you will receive confirmation from us. You will then need to email the drawings and plans to the Lead Local Flood Authority (LLFA) at: Floodriskmanagement@manchester.gov.uk.
The drawings must be no larger than A0 size, and they need to include the following.
1.1 Location Plan
This must be at an appropriate scale. Use an Ordnance Survey map for the basis of your location plan. Show the general location of the site where the proposed work is to take place. Include general features and street names. The plan must also identify the watercourse or other bodies of water in the surrounding area.
1.2 Site Plan (general arrangement)
You must provide a plan of the site showing:
- The existing site, including any watercourses
- Your proposals
- The position of any structures, which may influence local river hydraulics. These will include:
- bridges,
- pipes and ducts,
- ways of crossing the watercourse,
- culverts and screens,
- embankments,
- walls,
- outfalls and so on.
- You must also include existing fish passes, or structures that allow fish to pass upstream and downstream.
- Draw the plan to an appropriate scale. State the scale on the plan.
1.3 Cross Sections
If your planned work encroaches into any watercourse, your plan should include cross sections. They should show both upstream and downstream of the proposed works. Draw these as if looking downstream on the watercourse. Include details of existing and proposed features and water levels.
1.4 Longitudinal sections
We also need longitudinal sections. Take these along the centre line of the watercourse. Show the existing and proposed features including water levels, bed levels and structures. They should extend both upstream and downstream of the proposed work.
1.5 Detailed drawings
These are to show details of the existing and proposed features such as:
- The materials you'll use for any structures
- The location of any proposed service pipes or cables. It's important to show any that may affect the future maintenance of the watercourse
- Details of any tree, shrub, hedgerow, pond or wetland area that the proposed work may affect
- Details of any planting or seeding
- Dams and weirs. (The plan must show the extent of the water held back under normal and flood conditions. We have to assess the possible effect on land next to the river. The plan must also show any land drains that the proposed work may affect)
- Site-specific headwall construction details for new connections into open watercourse
- Manhole schedules for new constructed chambers on existing culverted watercourses.
2.0 Required Survey Details (if applicable)
New connections onto existing culverted watercourses need specific detail. We'll need evidence of your culvert condition / CCTV survey. This must show that the condition of the culvert can support a connection at your proposed location. Consider the existing culvert's construction material in your method statement.
3.0. Construction Details (Method Statement / Temporary Works)
You need separate consent for the permanent and temporary works. Temporary works could include cofferdams (watertight enclosures) across a watercourse. You may need temporary diversions of water while you carry out the work. For any temporary work, we need to know how you are proposing to do it.
Your method statement should include details of how you plan to minimise disruption. It should also explain how you'll reduce any unwanted effects while you do the work. We need to know when you propose to carry out the work and how long you think it will take. When you are planning this work, allow enough time for us to consider your application.
Your method statement must give step-by-step procedures for both construction and temporary works. You should also include pollution protection measures, for example silt fences and sediment traps to prevent silt runoff into the watercourse.
4.0 Programme of works
Alongside your proposed method statement, we'll need an estimated programme of works. This must include estimates for both permanent and temporary working arrangements. Supply it in a Gantt chart format for assessment.
5.0 Landowner approval (if applicable)
If the consent requires work on land that you do not own, we will need approval from the relevant owner(s). Submit this approval with the proposed land drainage consent application. It must contain written / signed consent - from the third party - that they have agreed to the works.
6.0 24-Hour Emergency Contact
You must give us a 24-hour emergency contact number before we determine your application. If that contact changes during approval to construction, you must give an update 7 days before the work begins.