Underground Utility Surveys2024-04-23T11:54:06+00:00

Underground Utility Surveys

All excavations come with risks such as underground utility strikes.

These risks could be from as little as loss of time to catastrophic loss of life.

ZS Surveys can provide packages to ensure all risks are minimized – even prevented.

A highly accurate utility survey should not be overlooked. This can save time on design and construction, and ultimately save costs.

ZS Surveys have invested extensively to supply our surveyors with the most up to date equipment, to ensure accuracy is of the upmost importance.

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    Types of Underground Utility Survey

    There are numerous types of utility survey that can provide varying levels of detail and information.

    The standard types of underground utility survey that ZS Surveys Ltd provide are as follows:

    • PAS 128 Survey Category Type D – This is a desktop study only; our surveyors will not attend site. The only information received in this is the asset owner records for the area in question. This is a good indication of utilities in a certain area but is certainly not an accurate representation and should not be relied upon.

    • PAS 128 Survey Category Type C – Similar to Type D, however, our surveyors will attend site and will validify the accuracy of the Asset Owner Records. This can be done by location geophysical features that validate the records provided.

    • PAS 128 Survey Category Type B – For a Type B survey, our surveyors will attend site and using Geophysical methods (GPR / EML) will attain the accurate horizontal and vertical position of utilities. The quality of the trace and location will then be depicted using a QLB level 1-4 ensuring the validity of the survey.

    • PAS 128 Survey Category Type A – In addition to Type B, the survey is checked by physically locating the utilities. This is done using safe excavating techniques at the location of the utility; exposing it and documenting it to check the accuracy of the Type B survey.

    Further to this, ZS Surveys Ltd can also provide the following:

    • Clearance Surveys – If you are drilling a series of locations within a site the areas that you are drilling can be mapped to ensure the area in which you are drilling is clear of obstructions.

    • Standard Underground Utility Surveys – Conducted in the same way as PAS128 Type B, however the utility quality grading isn’t applied.

    • GPR Surveys (Ground Penetrating Radar) – The GPR is a tool that detects changes in the geophysical make-up of the ground. This type of survey cannot detect what a utility is but can identify the presence of a ground disturbance. This type of survey is ideal for locating ground anomalies.

    • CCTV Drainage Survey – Location, depths and gradients of existing drainage is ideal for the accurate design of a drainage system on a new development. However, equally as important is the condition within the pipes of what you’re joining to. Defects in existing pipes could cause major issues in safe passage of wastewater. Knowing this information will save time and construction costs in unnecessary work.

    What We Provide

    Do You Have Any Questions? Our Experienced Team Is Ready To Help

    Why Use ZS Surveys For Your Underground Utility Survey?

    ZS Surveys provide an all-inclusive service for all your underground utility survey needs.

    From the first initial enquiry to the final output, our team will help you through the process.

    When using ZS Surveys for your underground utility surveys, we can ensure:

    • A competitive quotation and transparent costings
    • A method statement and risk assessment that reflects the project
    • Qualified and professional surveyors
    • Use of the best and latest equipment
    • Efficient and accurate processing
    • Quick deliverables from the underground utility survey
    • Reactive and proactive project management

    Frequently Asked Questions

    What is an Underground Utility Survey?2024-04-02T12:17:24+00:00

    Underground utility mapping is a survey provided to locate, mark and map locations and routes of utilities as well as below ground features. This can consist of, but not limited to, water, electric, gas, telecoms and drainage.

    Utility mapping can be conducted in a variety of locations from small domestic dwellings to large power stations, ports, stadiums, and city centres.

    If there is a possibility of utilities being found in or leading to your site ZS Surveys will be able to trace them.

    Why do people need an Underground Utility Survey?2024-04-02T12:19:05+00:00

    A detailed utility survey can save at a minimum, money, but ultimately can save someone’s life.

    There are 60,000 utility strikes in the UK each year. This can range from digging through a drain to encountering high voltage cables.

    The utility strikes have come at a cost of roughly £2.4 billion but cost countless lives.

    Some of the reasons you may have to conduct a utility survey could be:

    • Accurate plans for architects. Accurate plans both above and below ground save money in unnecessary unknown build charges.
    • Safe dig plans. If you are planning excavations, accurate below ground plans could save time and lives.
    • New utility laying. Accurate plans of the route could save you time and stop unexpected delays. Knowing what’s in front of you will create accurate design resulting in effective construction.
    • Open trench excavation, drilling, or directional drilling. Safe dig packs will save lives, time, and resources.
    • If your development links to an existing development, knowing where the utilities are will save you time and resources.
    How much does an Underground Utility Survey cost?2024-04-02T12:19:53+00:00

    This all depends on the size of the location and the output you are requiring.

    All locations are different and require varying methods of survey, along with different time scales of site work and processing.

    At ZS Surveys, we will aim to cater for your budget and your needs.

    How long does an Underground Utility Survey take?2024-04-02T12:20:26+00:00

    This is dependent on the size and scale of the site as no location is the same.

    We will give you a detailed breakdown of time on site once we are provided with the relevant information.

    What equipment is used in an Underground Utility Survey?2024-04-02T12:22:38+00:00

    There are various types of equipment that we use to accurately trace utilities and asses the condition of drainage:

    • EML locators
    • GPR (Ground Penetrating Radar)
    • CCTV Drainage CameraS

    These are then mapped using:

    • Total Stations
    • GPS Equipment

    And for processing, we use:

    • Proceq Screening Eagle
    • N4ce
    • CAD
    How accurate is an Underground Utility Survey?2024-04-02T12:24:11+00:00

    An underground utility survey is not without risk.

    However, all items that have been traced and located fall within a high degree of accuracy dependent on the equipment used.

    At ZS Surveys, our utility survey equipment is the most up-to-date and maintained regularly to ensure high accuracy in our surveys.

    What qualifications do your surveyors have?2024-04-02T12:24:46+00:00

    All our surveyors hold a minimum of a Proquol level 3.

    Within our ranks of surveyors, we have TSA qualified surveyors and degree qualified engineers.

    What does the customer receive after an Underground Utility Survey?2024-04-02T12:25:51+00:00

    Once your site work is complete, we will conduct a series of data processing to ensure that your underground utility data is as accurate as possible.

    Once this is complete, we will start the data extraction.

    Dependent on your requirements, we can provide specific files.

    However, our main data format would come in the form of a PDF and CAD file (.pdf/.dwg)

    What areas can be surveyed?2024-04-02T15:07:04+00:00

    Over the years, ZS Surveys have conducted utility surveys in various locations.

    Some of the areas that we have worked in are:

    • Domestic Houses and land
    • Streets within villages, towns, and cities
    • Infrastructure sites:
      • Sub stations (large and small)
      • Power Stations
      • Water treatment and distribution sites
      • Gas distribution sites
    • Dams, head walls and river infrastructure
    • Building and construction location
    • Highways and Motorways
    • Farm and agricultural land
    • Historic England locations and stately homes.
    • National Trust locations

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