Colorado builds a high accuracy database of the location of underground assets in the public right of way (1)

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• On The Mark Locators, LLC

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Colorado builds a high accuracy database of the
location of underground assets in the public
right of way

• New regulations were released January 14 by the
  Colorado Department of Transportation (CDoT) that
  mandates (1) the electronic submission of high
  accuracy plans showing the location of of
  underground infrastructure prior to commencing a
  construction project and (2) the electronic
  submission of accurate as-builts after completion
  of construction. Last week Rob Martindale,
  Program Manager Utilities/Railroads at CDOT, gave
  a webinar elucidating the revised statutes
  applying to excavation safety.

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• These are the latest revisions to Colorado
  statutes which began a year ago. To date the main
  revisions to Colorado Revised Statues, Title 9,
  Article 1.5 Excavation Safety (C.R.S 9-1.5 ) have
  set a new level for excavation damage prevention.
  First and foremost, for major public civil
  engineering projects it is now mandatory to
  conduct a subsurface utility engineering (SUE) at
  the beginning of a project. In preparation for a
  SUE survey project owners are now required to
  notify Colorado one call (CO 811). Within 10 days
  utility and telecom network owners and operators
  are required to provide records other information
  and mark the ground. After completion of the SUE
  survey the project owner must provide plans
  stamped by a professional engineer (PE) or
  professional land surveyor (PLS) showing the
  location of underground utilities and the quality
  level achieved for each. The target quality level
  is ASCE 38-02 QL B or A. If it has not been
  possible to meet or exceed QL B, documentation
  must be provided explaining what was attempted
  and why it was unsuccessful. Another mandatory
  requirement of the revised statutes is that all
  newly installed utilities must be electronically
  locatable.

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• This generally requires the installation of
  tracer wires or electronically detectable balls.
  To enforce the provisions of the revised statutes
  the Underground Damage Prevention Safety
  Commission was created by the legislation with
  powers of enforcement including civil penalties.
• As of January 14 Term 112 of the new
  regulations mandates the electronic submission to
  CDOT of a digital plan, typically the result of a
  SUE survey, showing all physical offsets, both
  horizontal and vertical, to all existing
  utilities, including laterals to buildings,
  before commencing work on a public construction
  project. Furthermore, Term 116 requires that
  accurate as-builts, stamped by a PE or PLS, must
  be submitted electronically to CDOT within 45
  days of the completion of work on a public
  construction project. The as-built submission
  must conform to CDOT published standards
  including the soon to be released ASCE utility
  as-built standard Recording and Exchanging
  Utility Infrastructure Data. Location accuracy
  in as-builts is required to meet ASCE Quality
  Level 3 (0.3 feet or 100 mm) or better.

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• The mobile application used by CDOT and its
  contractors for capturing and sharing information
  about the location of underground utilities is
  Pointman developed by Prostar, based in Grand
  Junction CO. Pointman runs on handhelds, phones
  and tablets and priced to be affordable for small
  contractors. CDOT has acquired a number of
  Pointman licences that enables it to provide
  Pointman apps to its construction contractors so
  they are all able to view CDOT data in the field
  and also add to the data as new infrastructure is
  installed or existing infrastructure is relocated
  in preparation for a road or highway project.
  Furthermore CDOT now requires that over 150
  utility companies and more than 1,000 utility
  installation stakeholders use ProStars PointMan
  to capture and record the location of underground
  utilities.
• The cloud enterprise application that manages
  this information at CDOT is Transparent Earth,
  also developed by Prostar. In the near future
  Prostar plans to release a new cloud application
  Prostar Pro. One of the important features of
  Prostar Pro is the ability to share data with
  other instances of Prostar Pro. For example, a
  large contractor may have its own instance of
  Prostar Pro which can connect to and share data
  with CDOTs instance of Prostar Pro when the
  contractor is working on a CDOT project.

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• The CDOT infrastructure data stored and managed
  in Transparent Earth is in general accurate to
  ASCE QL 3 (0.3 feet or 100 mm) or better. It also
  contains extensive metadata about each data set,
  referred to as its pedigree. The pedigree
  includes when the data was captures, the
  equipment used, who captured it, the quality
  level, the geographic projection and coordinate
  system, horizontal and vertical precision, and so
  on. The pedigree information is essential because
  it provides information required to assess the
  reliability of the data about each underground
  facility. The provisions of the Colorado Revised
  Statutes has resulted in the reliability of the
  data contained in the CDOT database being much
  higher than is typically found in utility or
  telecom records. The high accuracy underground
  utility data comes from two sources, both
  mandated by the recent Colorado Revised Statutes
  subsurface utility engineering surveys (SUE) and
  as-builts submitted for newly installed utility
  and telecom infrastructure. In addition, in some
  parts of Colorado, for example, the western
  slope, CDOT is inventorying existing underground
  infrastructure in the public right of way to
  support future civil engineering projects

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• . Ultimately it is to be expected that the CDOT
  data will comprise a complete, current, high
  accuracy map of underground assets in the public
  right of way in Colorado. Such a map will provide
  immeasurable benefits to everyone involved in
  construction in the public right of way.

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