Utility Services

Transmission Lines


Our TeamECF transmission line professionals have developed, designed, and constructed hundreds of miles of Overhead Transmission Lines as consultants and members of utilities. ECF can provide services from initial concept feasibility and planning studies, conceptual and preliminary engineering, to complete civil, and project management. ECF overhead transmission line services include:

• Use of PLS-CADD Software
• Structural Design and Analysis
• Civil/Foundation Design
• Permitting Support
• Line Route Selection and Evaluation
• Insulators Selection and Specification
• Conductor Selection and Ampacity Evaluation
• Conductor Vibration Analysis
• Construction Packages
• Construction Engineering Support
• Structure Replacement/Hardening
• Conductor Replacement/Upgrade
• Right of Way Clearance Evaluation and Remediation
• Conceptual Line Design and Cost Analysis
• Bid Packages Preparation
• Bid Evaluations
• Grounding and Bonding Studies
• Construction Management



ECF has a unique combination of resources and experience that is ideally suited to successfully meet all of your project needs. With our hands-on experience as owners, operators and consultants, the knowledge we bring to execute efficient design and construction of energy facilities, state, regionally and nationally, will enhance your project team's capabilities. We pride ourselves on our ability to complete projects expeditiously, safely and efficiently.

Examples of projects our employees participated in or had direct relevant and lead technical experiences include the following:

FPL | Levee Substation
Expand the Levee 500kV switchyard to the west to create two breaker and half bays with two additional line pull- off structures.
FPL, FL | Oakland Park-Pompano 138kV
Existing wood pole structures replacement with new round spun concrete poles scope included developing PLS CADD Project model, selecting new route/poles locations, developing permit and construction drawings, cost estimates, construction packages, and ordering poles and materials.
FPL, FL | Oakland Park-Sistrunk #2 138kV
Project initially started as a hardening project consisting of replacing existing wood pole structures with new round spun concrete poles. Due to the inaccessibility for construction and maintenance of existing wood structures to be replaced it was decided to relocate the portion of line on existing road right of way with a portion of the line sharing an existing distribution easement. Project scope included developing PLS CADD model, selecting new route/poles locations, developing permit and construction drawings, cost estimates, construction packages, and ordering poles and materials.
FPL, FL | Lauderdale-Palm Aire 138kV
Project consisted of the replacement of Three wood pole structures including two wood H-Frames structures inside FPL Lauderdale Plant right of way. Project scope included developing PLS CADD model, selecting new route/poles locations, developing permit and construction drawings, environmental permitting support, cost estimates, construction packages, and ordering poles and materials.
FPL, FL | Airport-Dade 138kV
Line Project consisted of the replacement of existing wood pole structures and relocation of a portion of line thru Dade County School Board property/park. Project scope included permitting support for a new easement thru Dade County School Board property/park, replacing/upgrade of existing 556 ACSR conductor to 954 ACSR conductor, evaluation of existing structures and insulators for new conductor size, developing PLS CADD model, developing permit and construction drawings, cost estimates, construction packages, and ordering poles and materials.
FPL, FL | Coast-Myakka 138kV ampacity upgrade
line Currently working on a ampacity upgrade study on a section of line to increase ampacity from 1015A @75C to 1320A @115C and the replacement of five existing double circuit concrete H-Frames with two new single circuit round spun concrete poles. Project scope includes developing PLS CADD model, performing survey point clearance evaluation, selecting poles locations for the double circuit concrete h-frames replacement, developing permit and construction drawings, environmental permitting support, cost estimates, construction packages, and ordering poles and materials.
Alcan, Canada | Grounding and Shielding Study
Performed an evaluation and testing of approximately 50kM of 345kV line counterpoise grounding and bonding system to determine the line risk exposure to lightning strikes and the effective grounding of the towers.
FPL/FL | 500/230kV Poinsett Substation
Modified the 500 and 230kV yards protection for the addition of a 500kV bus tie breaker.
FPL, FL | Bobwhite Substation
Designed and Engineered a New Transmission Substation with five (5) 230 kV 3000A breaker and a half bays.
FPL, FL | Duval and Palatka Substations
Installation of new 230 kV Transmission Capacitor Banks and protective systems.
FPL, FL | Clear sky 500/230kV switchyard
Developed layout for a 6 breaker 500kV yard with two single-phase banks of 500/230kV Autos and a six bay 20 breaker 230kV layout in both AIS and GIS.
FPL, FL | Levee 500kV yard
Reconfigure 500kV yard using CIGT in order to remove the 500kV dead end towers.
FPL, FL | Martin 500kV Switchyard
Engineered the replacement of a breaker, one wavetrap and two sets of CCVT's.
FPL, FL | Various Substations
Replaced existing 138 and 230 kV transmission Capacitor Banks and protective systems.
NextEra, NM | Red Mesa Wind Park Collector System
EPC Contract for the installation of Harmonic Filter Substation and Battery Storage Systems.
NextEra, USA | Various Switchyards
Conducted Relay Loadability review pursuant to NERC PRC-23 "Transmission Relay loadability" requirements.