PAS 128:2014 Specification for underground utility detection, verification and location

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PAS 128:2014

Specification for underground utility detection, verification and location

Status : Current   Published : June 2014



PAS 128:2014 Specification for underground utility detection, verification and location

Inaccurate, incomplete and/or out-of-date information on the existence and location of utility assets reduces the ability of those involved in new or rehabilitation works to make informed decisions. This lack of reliable information during design and construction activities can result in costly conflicts, delays, utility service disruptions, redesigns, personal injuries and even loss of life.

Accurate utility data could also afford the opportunity for as yet unrealized benefits, such as the use of remote robotic techniques to maintain asset networks in busy highways in future to reduce the need for intrusive maintenance practices (road excavations). Similarly accurate mapping of utility networks could improve asset modelling capabilities with more determined outcomes.
This PAS specifies requirements for the detection, verification and location of existing and new underground utilities.

It applies to the detection, verification and location of active, abandoned, redundant or unknown underground utilities and the location of their associated surface features. It applies regardless of where these utilities are located (e.g. in urban or rural areas, in the street, on private sites, such as hospitals or airfields). It applies to utilities buried no deeper than three metres.

This PAS sets out the accuracy to which the data are captured, the quality expected of those data and a means by which to assess and indicate the confidence that can be placed in those data.

More specifically it covers:
a)  project planning and scoping process;
b)  classification system for quality levels based on survey category type, location accuracy, inclusion of post-processing and level of supporting data;
c)  desktop utility records search;
d)  detection;
e)  verification;
f)  location;
g)  deliverables.

It does not cover:

1)  emergency utility works as defined by legislation or where there is imminent risk to life or limb;
2)  underground basements, underground tunnels (including railways, road tunnels, and underground pedestrian walkways), plant rooms and non-utility based features;
3)  above surface utility infrastructure (such as overhead power or telecommunication lines).
This PAS is for use by practitioners (usually a surveyor, geophysicist or subsurface utility engineer). It also might be of interest to clients (such as engineers, constructors, project managers and utility owners), who are responsible for recording information about underground utilities.
Where ground investigation, borehole, trial pit works and other construction works are proposed, a current utility mapping survey conforming to PAS 128 can be used as an indicator of the presence or absence of underground utilities before conducting further ground investigation prior to breaking ground.

PAS 128 was sponsored by the Institution of Civil Engineers (ICE).

The following organizations were on the Steering Group:
• Chartered Institution of Civil Engineering Surveyors
• EuroGPR
• Heathrow Airport Holdings Limited
• Highways Agency
• Institution of Civil Engineers
• National Joint Utilities Group
• National Underground Assets Group
• Ordnance Survey
• The Geological Society
• The Survey Association
• Transport for London
• University of Birmingham
• Utility Mapping Association
• Co-opted members
The Technical Lead was Ian Bush (Black & Veatch). The Drafting Panel included:
• Peter Barker (The Survey Association / Stratascan)
• Nick Zembillas (Cardno TBE)
• John Robinson (Subscan Technology Ltd)
Funding for the PAS was obtained from following organizations:
• Atkins plc
• Cardno TBE
• EuroGPR
• Heathrow Airport Holdings Limited
• Premier Energy Services Ltd
• RSK Group plc
• Subscan Technology Ltd
• SUMO Services Ltd
• The Geological Society
• The Survey Association

Standard NumberPAS 128:2014
TitleSpecification for underground utility detection, verification and location
Publication Date30 June 2014
DescriptorsUnderground, Verification, Planning, Quality, Underground structures, Manholes, Surfaces, Data, Classification systems, Pipes, Electric cables
ISBN978 0 580 79824 5
File Size7.866 MB

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