Manhole Surveys
Our team carries out manhole surveys to accurately record the condition, depth, and connectivity of manhole chambers as part of wider drainage and utility mapping projects. Using STC25 manhole cards alongside CCTV inspection, we capture detailed data on chamber construction, pipe connections, and invert levels, giving contractors and engineers a clear picture of the below-ground drainage network before design or construction work begins.
Our Manhole Survey Process
Our surveyors record each manhole using standardised STC25 cards, capturing dimensions, construction details, pipe connections, and depths to invert for every chamber surveyed. Where a fuller picture of the connecting pipework is needed, we combine this with CCTV drainage surveys, allowing us to provide a complete record of both the chambers and the pipe runs between them.
Why Choose Subvision for Manhole Surveys
At Subvision, we bring more than 3 decades of surveying experience to every manhole survey we carry out, working to SSIP and ISO accredited standards, and Safe Contractor, CHAS, and Constructionline approved methods. Our team supports contractors, developers, and planners nationwide from our Essex base, delivering accurate manhole survey data at competitive rates to inform drainage design, maintenance planning, and asset records.
MANHOLE SURVEY FAQ’S
