Excavation Risk Assessment Generator
By the Riskora Editorial Team · Reviewed against our editorial standards · Last reviewed
Generate thorough excavation risk assessments online. Cover trench collapse, underground services, ground conditions, and plant operations.
UK (RAMS) example document — Two-Storey Rear Extension — 14 Birchwood Lane, Reading. Client: Mr & Mrs A. Whitfield (Private Client). Site: 14 Birchwood Lane, Reading, RG1 5JT. Scope: Construction of a two-storey rear extension (6.4m × 4.2m) to an existing semi-detached dwelling. Works comprise breaking out of existing rear elevation, trench-fill foundations to 1.0m, traditional cavity blockwork to first floor, pre-stressed concrete lintels, timber roof structure with natural slate finish, plus alterations to existing rear wall to form structural opening with rolled steel joist (RSJ 203×102 UB23). Works programmed over 9 weeks with a peak site team of 6 operatives. Hazards assessed: Manual handling — blocks, lintels, plasterboard, Working at height — independent scaffold & roof structure, Buried services strike during excavation, Collapse of excavation / trench wall, Hand-arm vibration (HAVS) — breaking out, drilling, Silica dust — cutting blocks, brick, concrete, Vehicle/pedestrian segregation — narrow domestic street.
Full version
Takes less than 5 minutes
No card required · 1 free PDF · Upgrade any time (completely free)
Every Excavation Is Different
No two excavations are the same. Soil type, depth, proximity to structures, underground services, and weather conditions all affect the risk profile. A generic risk assessment template doesn't capture these variables, leaving gaps that could lead to incidents or enforcement action. Understanding the complete guide to RAMS in the UK helps frame why proper documentation matters.
How Riskora Helps
Riskora generates excavation risk assessments with pre-loaded hazards specific to your type of excavation. Whether it's a shallow service trench or a deep basement dig, the tool suggests relevant risks and control measures based on your project details. You can also use our standalone risk assessment builder or method statement tool.
Who it's for
- Groundworks contractors preparing excavation-specific risk assessments
- Civil engineering firms documenting deep excavation risks
- Utility companies assessing trench work hazards
- Site managers reviewing excavation safety documentation
Understand the Fundamentals
Before you generate your document, these guides cover the knowledge that underpins every good RAMS, risk assessment, and method statement.
UK Legal Requirements for Risk Assessments
What the law requires for risk assessments under MHSWR 1999 and when they must be recorded.
RAMS vs Risk Assessment
When a standalone risk assessment is enough and when you need a full RAMS document.
How to Write a RAMS Document
If your risk assessment needs to be part of a RAMS, this guide covers the full structure.
What Is a RAMS Document?
Learn how risk assessments fit within the RAMS framework used across UK construction.
Risk Assessment Legal Requirements (UK)
The legal framework behind risk assessments in the UK — what the law requires and what 'suitable and sufficient' means.
RAMS vs Risk Assessment — Key Differences
When you need a full RAMS versus a standalone risk assessment, and how the two documents work together.
What UK Law Actually Says
Direct quotes from the named regulations, with plain-English explanations of what each one means in practice.
Regulation 22, Construction (Design and Management) Regulations 2015
“All practicable steps must be taken, where necessary to prevent danger to any person, to ensure that any new or existing excavation which may reduce the security of any structure does not collapse.”
CDM 2015 reg 22 is the operative duty for excavation. Every excavation risk assessment must show how collapse is prevented — typically through stepping, battering, or proprietary support — and how adjacent structures are protected.
Read the source on legislation.gov.uk →HSG47 — Avoiding danger from underground services
“Underground services include gas, electricity, water, telecommunications and oil pipelines. Damage to any of them can put lives at risk. The starting point for any excavation must be to assume that services are present until proved otherwise.”
HSG47 is the recognised standard for service avoidance. The risk assessment must reference plans, CAT-and-Genny scanning, hand-digging the first 600mm, and a safe-digging permit before mechanical excavation starts near known services.
Read the source on legislation.gov.uk →The Numbers Behind the Risk
Why this matters — the most recent published figures from the Health and Safety Executive and ONS.
5 worker fatalities
Annual average construction worker fatalities involving struck-by or buried-by excavation collapse, 5-year HSE average. The cases that reach the press are almost always rooted in inadequate support and an assessment that didn't reflect ground conditions.
Source: HSE — Construction statistics →60+ utility strikes per day
Estimated daily underground utility strikes in the UK across all sectors, based on Energy Networks Association and water-company reporting. Most are preventable with HSG47-aligned controls in the risk assessment.
Source: LSBUD — UK utility strike data →Worked example: 1.8m deep service trench in a domestic front garden
Scope. Connect a new water main to a domestic property. 14m run from highway to meter, mixed made-ground over London clay. Two operatives, a 1.5t mini-excavator, a wacker plate and a vacuum-excavation unit on standby for the final connection. Adjacent gas service runs parallel at unknown depth.
Hazards captured. Trench collapse in made-ground, strike of the parallel gas service, strike of unmarked telecoms, falls into the trench by the homeowner / pedestrians, manual handling of trench boxes, HAVS exposure from the wacker, slips on spoil, plant-operator visibility around the property gate.
Controls in the assessment. Statutory undertakers' plans obtained and reviewed; CAT-and-Genny scan of the full route before any digging; hand-dig the first 600mm and within 500mm of the marked gas; proprietary trench box installed for the full 1.8m depth (manufacturer's installation method to hand); pedestrian heras with covered walkway and signage from the highway; HAVS log against the EAV (2.5 m/s² A(8)); banksman for the mini-excavator on the gate manoeuvre; vacuum-excavation used for the live connection. Permit-to-dig signed before mechanical excavation.
Why it would pass review. Each hazard pairs with a specific, testable control. Depths, distances and standards (HSG47, BS 5837 where applicable) are named. The residual rating sits in the low band only after the trench box and the permit-to-dig are both in place — which the document makes explicit.
Common Mistakes (and How to Avoid Them)
1. Treating 'shallow' service trenches as not needing support
Why it fails: Made-ground in domestic and urban environments collapses well below 1.2m. The HSE has prosecuted firms for collapse fatalities at sub-1m depths.
Fix: Risk-assess on ground conditions, not just depth. If made-ground or wet sand/silt is suspected, design for support from the surface down — battering, trench boxes, or proprietary shoring.
2. Relying on utility plans without scanning
Why it fails: Plans are routinely 10+ years out of date and frequently miss telecoms, district heating, fibre and abandoned services. Striking a live cable on plan-only evidence has been the cause of multiple HSE prosecutions.
Fix: Always combine plans with on-site CAT & Genny scanning, then hand-dig the first 600mm and within 500mm of any marked service.
3. Pedestrian protection added 'on the day'
Why it fails: Public-realm excavations adjacent to footpaths require designed-in pedestrian segregation. Improvised barriers fail at night and in rain, and create liability if a member of the public falls in.
Fix: Specify the barrier type, covered walkway requirement, signage standard and night-time lighting in the assessment itself — not as a 'site supervisor to arrange' note.
4. Missing emergency rescue arrangements
Why it fails: A trench casualty needs extraction within minutes, not hours. Without a documented rescue plan, the assessment cannot demonstrate compliance with CDM 2015 reg 13 'plan and manage'.
Fix: Include a named rescue method (rope and harness, ladder, or specialist call-out), nearest A&E with postcode for emergency services, and rehearsed roles for each crew member.
Excavation depths and the support decision
- 0 – 600mm: Hand-dig zone. No mechanical excavation until services are proven clear.
- 600mm – 1.2m: Support required unless a competent person has assessed the ground as self-supporting (rare in UK urban conditions). Battering, stepping or trench box.
- 1.2m – 2.0m: Trench box or proprietary shoring is the default. Sole-trader 'I'll just be a minute' working is the most common fatality pattern.
- >2.0m: Designed temporary works required, signed off by a competent temporary-works engineer.
Why ground type beats depth as the risk driver
The fatal collapses that reach HSE bulletins are not the deep trenches — those are typically well engineered. They are the 0.9–1.4m service-strike jobs in made-ground, wet sand, soft silt or saturated clay where the operative is in and out 'for a minute'. A 'suitable and sufficient' excavation risk assessment leads with the ground type, not the depth, and drives the support decision from there.
For UK domestic and urban work, treat all made-ground and any saturated soil as collapse-prone from the surface down. The cost of a trench box is trivial against the cost of a fatality investigation.
Key Features
- Excavation-specific hazard libraries
- Ground condition risk factors
- Underground services checklists
- Trench support requirements
- Download to PDF
- Adapt for different excavation types
Common Questions Before Getting Started
Will this take long?
Under 5 minutes. Select your trade, pick hazards, download.
Is it complicated?
No training needed. The guided builder walks you through every step.
Do I need experience?
If you know what work you're doing, you can use Riskora.
Is it free to try?
Yes. The Free plan needs no card — generate, review and download one free PDF. Upgrade any time for branding, DOCX, sign-off and higher limits.
Create your RAMS in under 5 minutes
No onboarding or setup needed — start generating documents instantly
Try Riskora FreeNo card required · 1 free PDF · Upgrade any time (completely free)
All documents generated by Riskora should be reviewed by a competent person before use on site. Riskora provides structured templates — professional judgement is always required.
What your RAMS actually contains
Riskora builds a structured, client-facing document — not a generic AI paragraph. Every section is shaped around your job, your site and your team.
Hazards
Task-specific hazards for the job, captured row by row — not a generic list pulled from an old RAMS.
Controls
Control measures mapped to each hazard with residual risk scoring after controls are applied.
PPE
PPE requirements tied to the activity and site, ready to brief to the team.
Method steps
Step-by-step method statement structured around how the work is actually sequenced on site.
Emergency arrangements
First aid, rescue plan, emergency contacts and site-specific escalation routes.
COSHH prompts
Substance prompts when the work involves chemicals, dusts, fumes or sealants — flagged early, not missed at review.
Sign-off
Operative sign-off captured against the document — names, dates and acknowledgement of the brief.
Version history
Every change tracked so you can show what was issued, when, and which version the team signed.
Approval status
Clear approval state on every document — draft, in review, approved, issued — visible across the team.
Audit trail
Who created it, who reviewed it, who signed it. A complete trail you can hand to a principal contractor or auditor.
From copied-and-pasted to site-specific
The reason RAMS get rejected is rarely the format — it's that the document is obviously generic. Riskora rebuilds it around this job, this site and this task.
Generic template copied from an old job.
- • Hazards and controls that don't match this site or task.
- • Method steps written for a different sequence of work.
- • No emergency arrangements specific to the location.
- • Client flags it as generic and asks for a rewrite.
Site-specific document structured around this job, site and task.
- • Hazards captured from the actual scope you pasted in.
- • Method steps sequenced for how the work runs on site.
- • Emergency arrangements and rescue plan tied to the location.
- • Approved internally, briefed to the team, signed off and stored.
From job details to signed-off document
A four-step workflow used by contractors, consultants and safety teams to turn informal job details into client-ready safety paperwork.
- 1Paste job details
Drop in a client email, a WhatsApp from the site manager, a scope of works or a tender note. Anything that describes the job.
- 2Riskora structures the document
Riskora turns your brief into hazards, controls, method steps, PPE, emergency arrangements and COSHH prompts.
- 3Review, edit and download
You stay in control of every section. Tweak anything, then download a clean PDF or share a link.
- 4Brief the team and record sign-off
Brief operatives, capture their sign-off and keep a full audit trail of who signed which version.
Built by people who've written this paperwork on real sites
Riskora is built by a founder with hands-on site and document experience — designed for contractors, consultants and safety teams who need to issue, brief and prove safety paperwork without losing a day to admin.
- Built for contractors, consultants and teams
Solo trades, principal contractors and in-house safety teams all run on the same workflow. - Supports multiple countries
UK, Ireland, Australia, New Zealand, US and Canada — wording and document types match the local standard. - Not just documents
Sign-off, approvals, version history and an audit trail — the management workflow around the paperwork.
Frequently Asked Questions
Ready? It takes less than 5 minutes.
No training. No complex setup. Just select your trade and go.
Start Your RAMS Now — It's FreeNo card required · 1 free PDF · Upgrade for branding, DOCX, sign-off and audit trails (completely free)
References & Further Reading
Primary UK sources covering the legal and practical framework behind RAMS, risk assessments and method statements.
Create your excavation RAMS free — preview before sign-up
Generate a preview first. Sign up only when you want to save, edit or export.
Final RAMS must be reviewed and approved by a competent person before use.
Riskora is an assistive document preparation tool. All documents generated must be reviewed, verified, and approved by a competent person before use on site. Riskora does not replace professional safety judgment, and no output should be treated as a legal compliance guarantee.