ACCESS TRAILS TO THE SITE

The first step is to clear a path for the construction of the transmission line. This is known as the Right of Way, or ROW. This stage may consist of logging, mulching, burning, and clearing of debris, as well as building access trails to the site

GEOMATICS & SURVEY

Survey crews stake or flag the locations for the towers using predetermined GPS coordinates. The crew will also determine if the planned tower location is actually viable for installation.

MATERIAL DELIVERY

Materials are stored and sorted in laydown areas offsite, and will be delivered to site as they are required

FOUNDATIONS & ANCHORS

There are two main types of towers that may be built: self-supporting and guyed. Self-supporting towers require foundations for each leg of the tower, while guyed towers require one foundation for the tower, and multiple anchors for the guy wires. After they are set, foundations and anchors are tested to ensure that they can bear the loads from the tower.

TOWER ASSEMBLY

The steel towers are assembled on the ground or in a laydown yard near the tower site. Each part of the tower is built separately and then connected together on site.

TOWER ERECTION

Towers are set into place either with cranes or with helicopters, depending on the design of the tower. Some towers are erected as one piece, others are done in multiple pieces. Towers are then secured to the foundation

STRINGING

Stringing refers to hanging and fastening the conductor wire to the towers. This can be done with cranes or helicopters.

SITE CLEARING & GRADING

The ground is cleared in preparation for construction of the substation pad. This stage may consist of logging, mulching, burning, and clearing of debris, as well as building access trails to the site.

SUBSTATION PAD CONSTRUCTION

The top soil on site is stripped to remove any unsuitable native material. Imported fill is then brought in and placed to build up the substation pad. This is completed with heavy equipment.

SUB STATION FOUNDATIONS

There are three types of foundations typically installed in a substation: helical piles installed with an excavator; driven piles installed with a large piling rig; and concrete cast-in-place type foundations where carpenters frame up forms and pour concrete to create the foundation.

ELECTRICAL EQUIPMENT

Major electrical components are installed on the structural steel and foundations. This includes power transformers, breakers, reactors and control buildings trucked in and installed with large cranes.

TESTING & COMMISSIONING

The final stage involves technicians performing tests to ensure all equipment will function when energized. Once this is completed, the substation is turned on and begins to provide power to communities.

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Construction & Project Management Services (CPM) is bona fide occupational qualified contractor and working in Civil and Electrical competence Technology since 1997, during this extensive time period we have concluded several projects.

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