1.4 WTG Access Survey



Identify most suitable access and to each WTG position and optimise required BOP works.


Extent of Clients responsibility extends significantly outside of site, survey errors made by the OEM, poorly negotiated site design negotiated with OEM leading to extra Capex costs for client.

Forte’s Risk Mitigation:

This is done as follows:

1. Acting as technical lead or support for WTG tendering and negotiations
2. Diligent preparation for survey and negotiation of access/site design with OEM
3. Chair value engineering meetings to optimise site access and civil design concepts

1.4 AS -Pic1
1.4 AS -Pic5

√ Validate and optimise all access and design concepts 

√ Ensure viable and safe transport routes



The proposed access to each WTG needs to be carefully considered to avoid unnecessary requirements being imposed on the project developer. Although the WTG supplier will request his requirements be met in full we know from experience there is room for negotiation at “pinch points” with regards to road widths, turning and storage areas along with required platform dimensions and crane assembly areas.

The final agreed design should minimise BOP construction and WTG logistics costs without compromising on the safe transport and erection of the WTGs.


1) Sign a) multiple work package (“EPC Manager”) contract or b) single-work package contract with Forte.

2) Launch WTG tender process and obtain commitments form OEM(s) to attend access surveys

3) Issue all required information to commence survey

4) Arrange all accesses to survey areas with landowner


1. Advise the client on WTG Tender BOP specifications: Forte can provide a list of requirements for the WTG Tender. These will include location of commencement point for access under client’s responsibility (as close to site as possible), onus on WTG supplier to commit to assisting in road design during tender period etc.

2. Analysis of OEMs civil specifications issued with tender: Forte can check the compliance with the employer’s requirements and identify permitted deviations from OEMs standard site requirements.

3. Conduct “point by point” site survey with OEM: Examine each WTG access and erection areas and discuss and agree initial concepts for both.

4. Review and critically assess received site inspection reports: Check received documents are in line with discussion and agreements made before and during the OEM site inspection visit.

5. Chair value engineering meetings and agree optimised site access and civil design concepts with OEM: Identify points of optimisation for discussion with OEM and negotiate improved BOP requirements to minimise clients Capex costs.



OEM Site Inspection Report:

Detailed report including photographic surveys with commentary and proposed remedial measures. Approved report to be included in Turbine Supply Agreement



Wind Farm Design Concept Drawings. These will form basis for later detailed design drawings which will ultimately be included in the WTG supply contract as “Clients provided Infrastructure”

Note: Once the design is agreed Forte can manage any additional onsite investigations relating to identifying and remedying any constraints on site access roads etc. This includes underground and overground services and any discussions with regulatory authorities or utilities.

Result: Identify most suitable access routes and necessary infrastructure (upgrades or new) required for deliveries/equipment access, storage of parts and erection of the WTGs.



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