Darlaston Strategic Development Access Scheme

Client

Dawnus Construction Holdings Ltd / Walsall Metropolitan Borough Council

Location

Walsall

Value

£80,000

This highways scheme involved four packages of highway improvement works at key locations in Darlaston as part of the overall regeneration strategy. The works were to ensure improved safety at the junctions for pedestrians, cyclists and motorised road users, to reduce queuing and to improve access to key employment sites.

Quantum was commissioned to undertake ground investigation works at the Bentley Mill Way and Bentley Road South sites relating to highways infrastructure improvements. At Bentley Mill Way, it was proposed to construct a new road adjacent to the existing carriageway and deepen approaches to the existing James Bridge Aqueduct, located at the northern end of the site.  At Bentley Road South, the ground investigation works were focused on an area where proposals consisted of re-profiling the highways approach to a canal bridge.

Dawnus was appointed as Principal Contractor for the scheme and undertook the construction of the new highways proposals. RSK Environmental Ltd was appointed as Engineer/Investigation Supervisor for the ground investigation works.

The fieldworks at Bentley Mill Way consisted of the following:

  • 7 machine excavated trial pits.
  • 3 vertical boreholes to 30m depth formed using dynamic sampling with localised open hole drilling and rotary core drilling in rock.
  • 1 vertical borehole to 30m depth formed using dynamic sampling open hole drilling in rock.
  • 2 vertical boreholes to 30m depth formed using open hole drilling methods.
  • 18 vertical windowless (dynamic) sample boreholes to max 7m depth.
  • 3 hand pits not progressed by drilling due to obstructions or other issues.
  • 2 no. deep standpipe installations for gas and groundwater monitoring formed in the rotary boreholes.
  • 7 shallow standpipe installations for gas and groundwater monitoring formed in the windowless (dynamic) sample boreholes.
  • 5 asphalt samples taken using hand held cutting tools.
  • Groundwater sampling from borehole installations.
  • Ground gas and water level monitoring from borehole installations.
  • 4 falling head tests undertaken in selected shallow standpipes.
  • Surface water sampling.
  • Determination of dissolved oxygen, conductivity, pH and temperature using a SmarTROLL device.
  • Determination of the presence of volatiles in environmental soil and water samples using a Photoionisation Detector (PID).
  • GPR and electromagnetic survey for the identification of possible utilities.
  • GPR and electromagnetic survey for the identification of possible unrecorded mine workings/associated features.

The fieldworks at Bentley Road South consisted of the following:

  • 2 vertical boreholes to 15.8m depth formed using dynamic sampling with localised open hole drilling and rotary core drilling in rock.
  • 2 vertical boreholes to max 3m depth formed using dynamic sampling methods.
  • 4 dynamic probe tests taken down to refusal.
  • Standard penetration testing undertaken in boreholes.
  • 2 standpipe installations for groundwater monitoring formed in the rotary boreholes.
  • Groundwater level monitoring from borehole installations.
  • GPR and electromagnetic survey for the identification of possible utilities (pub car park site).