Sorenson 765kV East and West Transmission Project
Construct 2 new single circuit 765kV transmission lines. Each line will originate from tap points on the existing Dumont-Marysville 765kV line and will terminate at Sorenson Station. The Sorenson 765kV Extension, West line will be 6.46 miles long and will consist of 33 lattice towers. The Sorenson 765kV East line will be 8.16 miles long and will consist of 37 lattice towers.
Puerto Rico hurricane recovery efforts from March 2018 to Present
In February 2018, HELIUS joined the Puerto Rico Recovery Efforts to help restore power due to the hurricanes of 2017. HELIUS is assisting in building a solid energy grid with our MD 600’s and Robinson 44. We are honored to be a part of this major recovery project.
MVP 3 and 4 345kV/161kV Transmission Project
Installed 121 miles of double circuit 345kV / 161kV self-weathering steel monopoles including removal of existing 161kV in existing ROW. Installed / Expanded three 345kV Substations including O’Brien, Kossuth, and Webster. Installed 71 miles of MVP 4 transmission line of DC345/ 161kV self-weathering steel monopoles, including removal of existing 161kV transmission line in existing ROW. Includes one 345kV Black Hawk Substation Expansion. Includes all environmental, access roads, QA/QC, safety, steel monopole structures, conductor, hardware and assemblies, OPGW and static wire. Helicopter aided construction, polymer insulators, large drilled pier (cased and slurry drilled) full length anchor bolt foundations. Major outage and return to service constraints were required. All work, including both the transmission lines and substations were performed on an EPC basis.
Arizona Public Service
Install approximately 38 miles 500 kV transmission line mainly on self-supporting steel tube structures. Installation of drilled pier anchor bolt foundations, SWPPP BMPs, material yards and handling of all material. Construct, improve and maintain all right-of –way access roads as defined. Installation of all insulators, hardware, triple bundle conductor, dampers, grounding and all other necessary appurtenances to construct this project.
Arizona Public Service
Installed a new single circuit 345 kV transmission line, approximately 168 miles in length and supported on single circuit h-frame (majority), monopole and lattice structures, were constructed from Sigurd to Red Butte Substations. This EPC Project included all environmental compliance and helicopter aided construction through the remote access and environmentally sensitive areas. Provided access roads, material yards, site preparation, fencing and gates, foundations, wood, steel and concrete structures, hardware, insulators, conductor, overhead ground wire (OHGW), optical ground wire (OPGW), grounding, clean-up and restoration and all appurtenances such as splices, dampers, and jumpers, all performed on an EPC basis.
Clover Substation to Future Limber Substation 345 kV Transmission Line Constructed a new single circuit 345 kV transmission line, approximately 68 miles and supported on single circuit lattice steel towers, shall be constructed from Clover Substation to the future Limber Substation. This segment shall be designed and constructed to 500 kV standards including lattice towers, insulation, conductors, hardware and clearances, and energized at 345 kV. This line uses triple-bundled, 1949.6 kcmil ACSR/TW “Athabaska” phase conductors, one ½ inch EHS shield wire and one optical ground wire (OPGW). Limber Substation to Oquirrh Substation 345 kV Transmission Line Constructed a new double circuit 345 kV transmission line, on self-supporting double circuit tubular steel poles, near the future Limber Substation and terminate at Oquirrh Substation at a substation deadend structure between circuit breakers 325 and 345. The work at Oquirrh Substation supported three separate and distinct transmission projects for the Mona- Oquirrh transmission project. 1. Terminate a new Terminal- Oquirrh #3 line in bay 6. 2. Terminate a new Terminal- Oquirrh #4 line in bay 5. 3. Terminate the new Clover-Oquirrh line in bay 5. Bay 5 and part of bay 6 are all new, and follow the pattern of bays 7 and 8. A new 200 MVAR 345 kV shunt capacitor bank was added to the 345 kV north bus. The shunt capacitor bank was located in bay 4, on the south side of the north bus. Control and relay panel additions, modifications, and replacements were required to support the 345 kV additions/modifications. All of the panel additions, modifications and replacements occured within the existing 345 kV control building.
Helicopter support- constructed 500/230kV transmission Line from the TS9 Substation located south of State Route 74 east of the Agua Fria River to the Pinnacle Peak Station located on the north side of Pinnacle Peak Rd. west of Scottsdale Rd. Total distance of 27 miles. Constructed a double circuit line of 500/230kV with (3) 1780 ACSR 84/19 (Chukar) conductors per phase for 500kV and (1) 2156 ACSR 84/19 (Bluebird) conductor per phase for 230kV, plus two OPGW wires utilizing Tubular Steel Poles. Install down leads, cushions, cable racks and OPGW defenders.
Salt River Project
Helicopter Support- Constructed 14.1 miles of single circuit 500kV and 37.3 miles of double circuit 500/230kV electric transmission line on self-supporting galvanized steel pole structures from Pinal West Substation (near Mobile, AZ) to the new Duke Substation (SE of Maricopa AZ and adjacent to the existing Santa Rosa substation) then to the new Pinal Central Substation (807 South Eleven Corner Mile Road). The scope also included an additional 3.0 miles from the PCL substation east, to link to the existing 500/230kV transmission line. The transmission line crossed private property and State of Arizona Lands. Approximately 3 miles of the line route paralleled existing 115/230kV transmission lines. Line crossings included 230kV, 115kV, 69kV, distribution lines, Federal and State highways, Union Pacific RR, El Paso Natural Gas pipelines and irrigation canals.