Civil construction site with reinforcement and lifting equipment.

our approach

Primero – St Ives Control Establishment

Culhig Surveying was engaged to establish a reliable survey control network around the St Ives processing plant and Mill building to support ongoing engineering, design and future survey activities.

Project Overview

Survey expertise in practice.

Culhig Surveying was engaged to establish a reliable survey control network around the St Ives processing plant and Mill building to support ongoing engineering, design and future survey activities. The works included transferring survey control from an established external survey mark, establishing a permanent site control network and adopting the GOLDFIELD94 project coordinate system.

DELIVERY

Our role on the project.

Review and adoption of existing published survey control.
Transfer of horizontal and vertical control to the plant site.
Static GNSS observations and processing to establish the site datum.
Establishment of seven permanent survey control points around the plant and Mill building.
Completion and adjustment of a closed-loop traverse through the control network.
Precise differential levelling through all principal control points.
Preparation of final coordinates, reduced levels and QA/QC documentation.
Development of a consistent site control framework for future set-out, as-built and engineering survey works.
As-built survey of the existing plant gridlines within the newly established network coordinate system.

OUTCOME

Delivery that makes a difference.

Achieved a horizontal traverse misclosure of only 1.3 mm over a 555 m traverse, providing a relative accuracy of 1:436,022.
Achieved a level-run closure of just 0.2 mm over approximately 618 m.
Successfully established seven permanent, recoverable control marks around an operational processing plant.
Transferred and validated horizontal and vertical datum using static GNSS, RTK observations, total station traverse and precise levelling.
Established a clearly defined GOLDFIELD94 coordinate framework, reducing the risk of coordinate-system errors in future design, set-out and as-built works.
Completed an as-built survey of the existing plant gridlines in the new network coordinate system, providing a direct relationship between existing plant infrastructure and the newly established survey control.