How to Stay Safe Around Manholes

Manholes are a critical part of infrastructure across a number of industries, from construction and utilities to roadworks projects. But they also present serious risks if not properly secured and fully visible - from trip hazards and vehicle damage to life-threatening falls and toxic exposure.

Whether you're managing a small roadworks project or a major civil engineering scheme, keeping both workers and the public safe around manholes is non-negotiable.

In this guide, Start Safety’s experts explore why manhole safety matters, outline the essential equipment needed to secure your site, and provide a practical checklist to follow. You'll also find tips and links to safety essentials like manhole barriers and temporary manhole covers, so you can equip your team and site with confidence.

Why Does Manhole Safety Matter?

Manholes can pose a range of hazards if not properly managed:

Falls into open or unstable access points.
Toxic gases such as hydrogen sulphide or methane in confined spaces.
Trip hazards for pedestrians and workers.
Unmarked openings that could catch road users unaware.

Under UK law, employers and contractors are obligated to assess and remove these risks in accordance with regulations from the Health and Safety Executive (HSE). Failure to do so not only puts lives at risk but can result in legal action, site shutdowns, as well as reputational damage.

Real-world incidents involving unsecured manholes have led to severe injuries, fatalities, and costly litigation - reinforcing the importance of prevention through proper planning and equipment.

In April 2025, a dog walker from Wales suffered internal injuries after falling into an uncovered manhole. And in July 2020, a 10-year-old boy sadly died after falling down a manhole on a building site in Glasgow. The building firm operating the site was fined nearly £900,000 for failing to secure the area.

While the number of manhole incidents is not extensively documented, a study funded by the UK Department for Transport in 2023 estimated that injuries from damaged pavements, including defective manhole covers, cost the UK taxpayer up to £500 million annually. This figure includes emergency medical treatment, hospital care, community and social care services, and personal injury claim payouts by local authorities.

Essential Manhole Safety Equipment

Choosing the right tools for the job is the first step in preventing accidents. Here’s what you need to ensure manhole safety:

Manhole Barriers

Barriers are used to clearly cordon off manhole access points and create a physical and visual warning to others. They’re especially important in:

Busy roads or pedestrian-heavy footpaths.
Areas with high levels of vehicle or plant movement.
Jobs where the cover needs to stay open for long periods.

Top tip: Make sure your barriers are stable, visible, and meet the appropriate safety standards for your industry. As well as the barriers themselves, you can buy feet for some products, adding ballast and stability.

Manhole Covers

When a manhole needs to be opened temporarily - or a permanent cover is damaged - a secure, rated replacement is essential to prevent falls.

Look for temporary covers that meet required load ratings for foot or vehicle traffic.

Ensure tight, stable fitting to prevent rocking or dislodging.
Use lockable covers in high-risk areas to deter tampering.

There are also a range of products which allow you to keep staff safe while they are working on open manhole covers. Safety frames are an innovative way to increase safety and protection around manholes, while still allowing access.

Other Safety Accessories

In addition to barriers and covers, consider:

Gas detectors for checking confined space air quality.
PPE like gloves, hi-vis gear, and harnesses.
Lifting equipment (To lift the cover)
Warning signage to alert road users and pedestrians.
Confined space equipment, including tripods and winches where entry is required.

Manhole Safety Checklist

Use this checklist before, during, and after any work involving manholes. It’s a simple but effective tool for improving site safety.

Before accessing a manhole:

Assess the area and check for nearby traffic or pedestrian risks.
Put up appropriate barriers.
Test the atmosphere for toxic or explosive gases.
Wear correct PPE (hi-vis, gloves, harness, etc.).

During the operation:

Keep the work zone clear of debris.
Keep the manhole cover nearby when not in use.
Limit the number of workers near the open access point.
Consider an open manhole guard frame (manhole guardian product)

After the job:

Replace and secure the manhole cover properly.
Only remove barriers once the area is safe.
Log any incidents, hazards, or issues for review.

Start Safety’s Top Tips for Staying Safe Around Manholes

Assume all manholes are in use until inspected and confirmed safe.
Use bolt down or weighted covers in high-traffic or public spaces.
Check barriers regularly to ensure they remain stable and visible.
Never leave a manhole open or unsecured at the end of a shift.
These small actions can make a major difference in preventing serious incidents.

Shop Manhole Safety Products

Don’t take chances when it comes to site safety.

Browse our full range of manhole barriers.
Explore secure manhole covers for temporary works.

Make your next job safer with trusted, compliant equipment from industry leaders. And if you’re unsure about what product is right for your next project, get in touch with the team at Start Safety, who can help you make the right choice.

FAQs About Manhole Safety

What is the legal requirement for securing a manhole?

Employers must comply with HSE guidelines, which require hazards to be properly managed. This includes clearly marking and physically protecting access points with appropriate equipment.

Can I use any barrier around an open manhole?

No. Barriers should meet safety standards and be appropriate for the environment (e.g. vehicle-rated for roads, pedestrian-safe for footpaths).

What types of covers are best for temporary works?

Look for lightweight but strong temporary covers with non-slip surfaces and high load ratings. Bolt down models are ideal in high-risk or public areas.

Do I need gas detectors every time I open a manhole?

If there's a chance of confined space entry or hazardous atmospheres, gas detection is essential. Even seemingly "dry" utilities can contain dangerous gases.

Can I leave barriers in place overnight?

Only if the manhole is fully secured and signage is adequate. In most cases, access points should be fully closed and the site left safe for the public.