Accurate survey data to STC25 standard

What are Manhole Surveys?

To effectively manage drainage and utilities, it’s essential to have accurate manhole data. Without it, you could overlook hidden issues, leading to costly redesigns or unexpected disruptions to your project.

Manhole surveys capture detailed information about the condition, structure and connectivity of manholes, chambers and pits. These surveys are essential for maintaining accurate records of underground drainage and utility networks.

Using rugged handheld devices and live, cloud-based survey software, we collect reliable data to industry standard STC25. This ensures your data is secure, even in the event of hardware failure, and allows multiple survey teams to work simultaneously, covering large areas efficiently.

We can provide your survey data in a range of formats, including spreadsheets, shapefiles, PDFs, or any other format you need. Tell us how you’d like to see your data and we’ll make it happen.

Typical information captured includes:

• Positional data
• Cover and invert levels of all features (pipes, weirs, overflows)
• Pipe sizes and materials
• Structure materials
• Access and egress (e.g., step irons or ladders) including condition

You can expect clear, visual reports that help you manage risk, plan maintenance and make informed decisions.

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When do you need Manhole Surveys?

Manhole surveys are essential when dealing with issues like deteriorating infrastructure, drainage system repairs, or unexpected disruptions to utility services. They help identify hidden problems in drainage and utility systems, allowing for proactive maintenance before small issues turn into collapsed manholes, severe drainage blockages, or utility failures.

Manhole surveys are valuable at multiple stages of a project or investigation. You might need one if:

• You’re an asset owner confirming existing drainage infrastructure before new development
• You need supporting data for infiltration surveys or to assess risk of Hydrogen Sulfide (H₂S) attack
• You’re a developer who needs clarity on existing assets to plan how your site will drain, or to support feasibility studies
• You want to prevent unexpected disruptions to utilities during upgrades or repairs
• You need to assess the condition of drainage systems after events like flooding or infrastructure failures

While manhole surveys are a specialist service on their own, they’re often even more effective when combined with:

• CCTV drainage surveys
• PAS128 below ground utility surveys
• Drainage investigations

For complex or intricate structures, we can also carry out 3D laser scanning, providing you with accurate CAD models or 2D plans/section drawings depending on your requirements.

Whatever your project, a manhole survey helps you reduce risks, prevent delays and plan smarter.

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How do Manhole Surveys work with SDS?

We use rugged handheld devices and specialist survey software to capture detailed data on manhole conditions, dimensions, and connections. This gives you precise reports and visual records, which can be used to streamline maintenance planning and ensure system reliability.

Get SDS in for Manhole Surveys

At SDS, we’re a long-standing, dedicated surveying business, delivering our services to private and public sectors across Kent and beyond. We specialise in manhole surveys, helping property developers, utility companies, and maintenance teams collect precise data on manhole conditions and connections.

Whether you’re assessing infrastructure for a new project or managing ongoing system maintenance, we help you ensure long-term system reliability.

Contact our team today for more information about our surveying services or to book your Manhole Survey.