Dunn to Winnsboro 230kV Transmission Line Construction 


Entergy Services, LLC


Mesa Line Services, LLC


Delhi to Winnsboro, Louisiana

Period of Performance

April 2020 - August 2020

DDI was engaged in this project well after the commencement of construction. Unseasonal rains and the general low-lying elevation of this project significantly altered the site conditions and required an immediate response, which did not allow for a detailed scope of work or matting plan to be developed. However, once DDI was brought onto this project, our team was able to create a scope of work moving forward. Our new scope included supply, installation, and removal of timber access matting, support of line construction and foundation operations, and site cleanup/restoration of this 24.9-mile new transmission line build. 

As matting was an unbudgeted expenditure, DDI was awarded this work based on proposing to mobilize only 3,500 mats to construct the entire project. DDI executed the project with this minimal amount of matting by constantly “flipping” mats to stay ahead of line construction and foundation crews. DDI’s “flipping” mats approach required detailed planning and coordination with other project coordinators as multiple operations were constantly in progress throughout this project. 

Despite the numerous logistical challenges caused by this approach, DDI crews successfully managed their scope of work without any schedule delays to line or foundation contractors. 



 Zero recordable and/or lost time incidents 

Exceeded the clients’ expectations in meeting all deadlines 

All work on this project was 100% self- performed by Diamond D 


3,500 ea
16’ timber mats 

60 acres
of restoration work completed