The –Paco–Araneta–Sucat–Paco–Araneta–Balintawak Transmission Line (abbreviated as SA, 8LI1QUE-DIM, 8LI1DIM-MNA, 8LI1MNA-MUN,) also known as Muntinlupa–Manila–Doña Imelda–Quezon Transmission Line, is a 230,000 volt, single-circuit, three-part transmission line in Metro Manila, Philippines that connects Sucat and Balintawak substations of National Grid Corporation of the Philippines (NGCP), with line segment termination at NGCP Araneta substation in Quezon City and Manila Electric Company (Meralco) Paco substation in Paco, Manila.
History
The Sucat–Paco–Araneta–Balintawak Transmission Line began construction in 1996 and went into service in 2000. It is operated by the privately-owned National Grid Corporation of the Philippines (NGCP) since January 15, 2009, and previously by government-owned companies National Transmission Corporation (TransCo) and National Power Corporation (NAPOCOR). It was owned previously by NAPOCOR from 2000 to March 1, 2003 and is owned currently by TransCo since March 1, 2003.
With the construction of the Skyway Stage 3, several steel poles are being replaced by newer ones specifically those along the Araneta segment and also added new poles on certain portions of the line.
Route description
The Sucat–Paco–Araneta–Balintawak Transmission Line passes through the cities of Muntinlupa, Taguig, Makati, Manila, and Quezon City. The Sucat–Paco and Paco–Araneta segments are under NGCP's South Luzon Operations and Maintenance (SLOM) District 1 (South Western Tagalog) while the Araneta–Balintawak segment is under North Luzon Operations and Maintenance (NLOM) District 7 (National Capital Region).
Sucat–Paco
The transmission line starts at Sucat Substation where it parallels Manuel L. Quezon Avenue and Laguna Lake Highway before it turns left. It then passes to Diego Silang Village and parallels with Carlos P. Garcia Avenue. It goes to the left again, passing through Manila American Cemetery and Bonifacio Heights before paralleling to South Luzon Expressway (SLEx) from Maricaban Creek to Magallanes Interchange and Osmeña Highway from Magallanes Interchange to Quirino Avenue. At Magallanes Interchange, it crosses to Epifanio delos Santos Avenue (EDSA). It continues on a straight route and after crossing Gil Puyat Avenue are 7 new steel poles that were used for the relocation of the line due to the construction of Skyway Stage 3. It crosses to San Andres Bukid and Paco. The cut-in connection to Meralco Paco substation is located in this district, where the line's Sucat–Paco section ends.
Paco–Araneta
The line parallels to Tomas Claudio Street (or Paco–Santa Mesa Road), PNR Metro Commuter railroad and Magsaysay Boulevard, turns left to Gregorio Araneta Avenue and run parallel with the said avenue and Skyway Stage 3, and the line's Paco–Araneta section ends at Araneta Substation.
Araneta–Balintawak
The line continues paralleling Araneta Avenue and Skyway Stage 3 until it passes to Valentin Ventura Street, Tuktukan Street, and Kaingin Road before it crosses to EDSA. It turns left and after a few meters is the transmission line's terminus which is Balintawak Substation.
Technical description
The transmission line consists of 214 steel poles (54 on the Balintawak–Araneta segment (1–54) and 160 on the Araneta–Paco and Paco–Sucat segments (1–8, 30-149, 150A, 150B, and 155–185)), 26 lattice towers (9-29, 150, and 151–154), and 1 portal tower located between steel poles 49 and 50 ((8LI1MNA-MUN)97) totaling to 241 transmission structures. Steel poles have flag tower design (suspension and anchor variants), while lattice towers have incomplete tower design. Portal towers are used on portions of the line where it intersects with another power line. It has a length of 34 kilometers (21 mi) and is a single-circuit, double-bundle power line.
From 2000 until the completion of the line's cut-in connection to Manila Electric Company (Meralco) Paco Substation, it was a two-part power line. Due to the construction of the line's cut-in connection to Meralco Paco Substation, two new steel poles were added between poles 143 and 144 of the Sucat–Araneta segment of the line. This cut-in connection to the said substation also made the transmission line from being a two-part to three-part power line.
In 2018, a portal tower located between steel poles 53 and 54 ((8LI1MNA-MUN)92) was removed and retired to give way for the widening of Lawton Avenue in Taguig.