Drainage method statement template: a site-specific form

A drainage method statement should set out the actual work sequence, the ground and service information used, how excavations will be supported or otherwise made safe, whether anyone needs to enter a chamber or sewer, and what happens when conditions change. This blank form helps a competent contractor assemble those decisions. It is not an approved safe system of work, a permit to dig, a confined-space permit or a substitute for the site risk assessment. The person planning the work must fill it from the real site information and brief the team before work starts.

Drainage work spans very different tasks: installing a new run in an open site, repairing a shallow domestic connection, working beside live traffic, or entering a chamber. The hazards and controls cannot be copied wholesale between them. HSE says the safe excavation system begins with planning, locating and identifying underground services, then safe excavation. Its excavation guidance also requires precautions against collapse, falls, falling material, nearby structural damage and water ingress. If a chamber presents a confined-space risk, HSE says avoid entry where possible; if entry is unavoidable, use a safe system of work and emergency arrangements.

The live Complys drainage RAMS guide already explains common hazards and a sample sequence. This page has a narrower, distinct intent: a copyable form and release checklist. It should link to that guide for explanation without repeating its long narrative. The guide's stronger product and legal claims need a separate whole-page review before promotion.

Before using the form

Agree the precise scope: new pipe installation, replacement, connection, CCTV, jetting or another operation. State whether excavation is involved, the trench depth and ground conditions, whether the drainage is live, whether a sewer or chamber will be entered, and the impact on public routes and other services. Obtain current drawings and service-owner information, then check actual positions. A drawing alone does not prove where a cable lies. Use HSE's HSG47 to plan locating and safe digging.

The responsible contractor should determine whether additional plans or permits are needed—such as a permit to dig, traffic management approval, confined-space procedure, lifting plan, temporary-works design or water-company permission. A heading in this template is only a prompt. If a safety-critical input is unavailable, do not turn its blank field into “N/A” to keep the job moving. Record who will investigate it and hold the affected work.

Copyable drainage method statement form

Replace every bracket with the site-specific answer and attach marked-up plans. Identify the competent author, reviewer and site supervisor. Delete only sections that truly do not apply, and state why.

1. Document and work details

2. Site information and design hold points

The site plan should mark the proposed trench and pipe alignment, access routes, spoil areas, protected public routes, nearby structures, known services and any exclusion zone. Record the actual service plans and locating method used. HSE HSG47 treats planning, locating and safe excavation as a connected system; an old drawing or cable-locator reading in isolation is not a complete check. If the alignment conflicts with a service, revise the design or method before work begins.

3. Excavation design and controls

Do not enter an excavation that has not been assessed and made safe. HSE warns that no ground can be assumed to stand unsupported in all circumstances. Support, battering, edge protection and plant position must suit the actual ground and loading. A competent person must inspect at the start of a shift and after events that may affect stability; no work should continue until defects are remedied. There is no universal safe trench depth or simple “two-metre rule” that removes the need for assessment. Keep spoil and machines away from the edge as the design requires, and record the actual separation and protection on the site plan rather than copying a stock number.

4. Drainage task sequence and stage checks

The competent author fills each stage with the approved activity, controls and release point. These rows are a structure, not instructions to perform the task in this order on every site.

If the work is CCTV or jetting without excavation, rewrite the stage table for that actual method. If the task involves a manhole or sewer connection, decide whether entry is needed at all. Entry can introduce a different level of risk and requires a separate assessment; never assume that a shallow opening is harmless or that every drain is automatically a confined space. The legal confined-space duties apply when the relevant risk of serious injury is present.

5. Chamber, sewer or other confined-space interface

Is entry proposed? [No / Yes, with reason]. Can the task be done from outside? [Decision and evidence]. Separate confined-space assessment and permit reference, if needed: [ ]. Competent entry supervisor and team: [ ]. Atmosphere, isolation, ventilation and monitoring controls chosen for this space: [ ]. Communication and entry/exit accounting: [ ]. Rescue plan, equipment, trained rescuers and emergency contact: [ ].

If entry is unnecessary, exclude it and protect the opening against falls and unauthorised access. If entry is unavoidable, the separate safe system and rescue arrangements must be completed before anyone enters. HSE's confined-space guidance requires avoiding entry where possible, a safe system where it is necessary, and adequate emergency arrangements. A line saying “call the fire service” is not an adequate stand-alone rescue plan. Do not have an untrained colleague enter after a collapsed worker. This form cannot select gas-monitor thresholds or rescue equipment for a particular chamber; specialists must do that.

6. Services, sewage, traffic and public protection

Underground services: [plans, locator, marking, trial-hole/exposure method, isolation/owner agreement where needed, permit and supervision]. Any service strike triggers stop work, area control and contact with the service owner under the emergency plan. HSG47 is the primary reference.

Existing sewage and contaminated water: [contact scenario, hygiene controls, washing/welfare, PPE, waste and medical escalation]. Do not assume every drainage project has sewage exposure; assess the actual material. If live flow can flood the work area, define isolation/diversion, weather monitoring and stop criteria.

Traffic and public interface: [highway/footway status, required authority approvals, approved traffic layout, barriers, lighting, access for residents/businesses, pedestrian diversion and emergency access]. A generic “Chapter 8 compliant” line is not enough. Use the project-specific traffic management design and competent provider where required.

Plant and lifting: [machine model, operator, inspection, lifting gear, lifting plan where applicable, exclusion zone, banksman/signaller and ground-bearing checks]. Separate people from moving machines. Define who can change the plant arrangement and what review is needed.

7. People, briefing and emergency response

If the trench moves, water enters unexpectedly, a service is exposed in a different position, or a chamber atmosphere cannot be confirmed safe, stop the affected stage. Move people to safety, preserve the area, obtain competent reassessment, revise the method and rebrief before release. A supervisor's verbal “carry on carefully” is not a replacement for the necessary controls.

8. Inspection, completion and sign-off

Do not pre-sign the form. HSE's excavation guidance explains inspection at the start of shifts and after events affecting stability. The test and handover requirements for a drain depend on the design, asset owner and project specification; this template does not invent a universal pass criterion.

A useful pre-release review

Can the team identify the exact pipe run and ground? Are all services located to a standard suitable for the planned excavation? Is trench support or an alternative safe method specified and available? Are the public and plant kept clear of the work? Is any chamber entry explicitly assessed rather than hidden in “connect to sewer”? Are emergency actions realistic for this location? Is the current revision briefed to the workers who will perform it? If the answer to any safety-critical question is unknown, that is a hold point, not a box to tick.

Complys and related owners

Link to the observed drainage RAMS guide for hazard explanation and the RAMS template for the general combined-document structure. The risk assessment software page is a possible commercial next step once its current implementation and whole-page claims have been independently checked. No software can determine ground stability, locate a live cable, approve a confined-space rescue or make a site-specific method safe on its own. The safe CTA is to complete this form using competent site information, then use a verified document workflow to manage review and issue if it supports the team's needs.

Source, claim, owner, product, links and writer-side QA

Terminal writer-side disposition: READY.