Looking back at the 500kV Lao Cai - Vinh Yen transmission line project after 7 months of construction

Bảo Nguyên |

The 500kV Lao Cai - Vinh Yen transmission line project started on March 3, 2025 and was inaugurated on the morning of October 17, 2025, 8 months ahead of schedule.

The 500kV Lao Cai - Vinh Yen transmission line project is a national key project that has been approved for investment by the Prime Minister.

The project has a total investment of more than VND 7,410 billion, a length of 229.5km, with a total of 468 power pole foundation locations passing through Lao Cai and Phu Tho provinces.

Cac dai bieu tai le khoi cong Du an duong day 500kV Lao Cai - Vinh Yen ngay 3.3.2025
Delegates at the groundbreaking ceremony of the Lao Cai - Vinh Yen 500kV transmission line project on March 3, 2025. Photo: Van Duc

According to Lao Dong in the first days of construction, the transportation of hundreds of tons of steel, wires, and super-school equipment to erect massive electric poles in the middle of high mountain terrain and deep streams encountered many difficulties.

Mot so duong tam co do doc cao, nen dat gap mua de nhao, lun khien xe co gioi khong the di chuyen. Anh: Minh Nghia
Some temporary roads have steep slopes, the soil is prone to rain and subsidence, making it impossible for motor vehicles to move. Photo: Minh Nghia
Chien si Quan khu 2 ho tro don vi thi cong mo duong, truc tiep tham gia van chuyen vat tu, thiet bi phuc vu thi cong Du an duong day 500kV Lao Cai - Vinh Yen. Anh: Thanh Trung
Soldiers of Military Region 2 supported the construction unit in opening the road, directly participating in transporting materials and equipment for the construction of the Lao Cai - Vinh Yen 500kV transmission line project. Photo: Thanh Trung

At the pole locations in Thuong Ha commune, Lao Cai province, specialized vehicles with 3 bridges sloped down the slope, while in front of the excavator, they had to go ahead to remove mud and pull the support cable.

Each meter of road is dozens of minutes of brain-tenching for drivers and technical staff. Many sections are just wide enough for wheels, with deep, steep abyss on both sides.

In some locations such as 78, 79, the entire foundation is located on the top of the mountain in the shape of a hat, the flat surface is narrow, and materials must be transported in small pieces.

Nhung chiec xe tai cho vat lieu len doc phai di kem voi mot may xuc banh xich de vuot doc. Anh: Van Duc
Trucks carrying materials up the slope must be accompanied by a chain reactionor to climb the slope. Photo: Van Duc
Dua xe cau 100 tan tiep can vi tri thi cong trong dieu kien thoi tiet that thuong. Anh: Van Duc
Bring the 100-ton crane to the construction site in unusual weather conditions. Photo: Van Duc

Or like column No. 56, the longer slope, specialized vehicles have to be divided into many small trips, combining both trailers and dump trucks, pulling each section. Every time it rains, the mud is thick, the vehicle can only get by meters.

Tan dung thoi tiet thuan loi, cong nhan tang ca lam viec ban dem. Anh: EVN
Taking advantage of favorable weather, workers work overtime at night. Photo: Van Duc

Mr. Nguyen Van Tuan - a worker at the construction site shared: "D determining that the rainy season affects the construction, we work overtime at night. The main work is digging the foundation, pouring the foundation and perfecting techniques.

Due to overtime, the brothers get additional meals at night as well as increased income. Although it is difficult, our workers clearly define the spirit from the beginning: We must do our best to ensure the project reaches the finish line on schedule.

De nhung thanh thep, cuon cap hay cot dien nay den duoc vi tri dung, tung chuyen xe phai xuyen nui, vuot rung bat ke nang mua. Anh: Van Duc
For these steel bars, cables or electric poles to be erected, each trip has to go through the mountains and over the forests regardless of the sun or rain. Photo: Van Duc
Du troi nang nong tren 37 do C, cong nhan o day van miet mai, hang say lao dong de hoan thanh cac cot mong cuoi cung duong day 500kV Lao Cai - Vinh Yen. Anh: Van Duc
Despite the hot weather above 37 degrees Celsius, workers here are still working hard to complete the final foundations of the 500kV Lao Cai - Vinh Yen line. Photo: Van Duc

According to the workers, spreading 500kV wires and pulling them across rivers and mountains is a difficult period for the electricity industry, this job requires workers to have flexible health and experience to do it.

Cong nhan lap gian giao keo day vuot Quoc lo 4E, dia phan tinh Lao Cai. Anh: Van Duc
Workers install scaffolding to pull ropes across National Highway 4E, Lao Cai province. Photo: Van Duc

"First of all, the electrician will spread ropes along the road, connecting from the top of one pole to the other to make a bidding line. This bidding cable was then stretched to the pillar and then tied to a 500kV power cable to pull it up.

When the wire was removed to the necessary location, 2 workers were waiting to do the task of locating the wire in the porous insulation to securely insulate the electricity. At this time, the worker has completed his work...", said Mr. Vu Quang Chien (Lam Dong power transmission team, Power transmission Company 3), who has 10 years of experience in pulling wires.

De rai day, treo day len dinh cot doi hoi nguoi co kinh nghiem va su dung may toi. Anh: Van Duc
To stretch ropes and hang ropes to the top of a pole, it requires experienced people and the use of a winch. Photo: Van Duc

On August 8, 2025, Permanent Vice President of the Vietnam General Confederation of Labor - Thai Thu Xuong and the working delegation visited and encouraged workers of the National Power Transmission Corporation (EVNNPT) to participate in supporting the construction of the Lao Cai - Vinh Yen 500kV transmission line project.

At the positions, the Permanent Vice President of the Vietnam General Confederation of Labor acknowledged and commended the efforts of EVNNPT and power transmission units in supporting the project.

Ngay 8.8.2025, Pho Chu tich Tong Lien doan Lao dong Viet Nam - Thai Thu Xuong cung doan cong tac da den tham hoi, dong vien nguoi lao dong thi cong Du an duong day 500kV Lao Cai – Vinh Yen. Anh: Dac Cuong
On August 8, 2025, Permanent Vice President of the Vietnam General Confederation of Labor - Thai Thu Xuong and the working delegation visited and encouraged workers constructing the Lao Cai - Vinh Yen 500kV transmission line project. Photo: Dac Cuong

The leaders of the Vietnam General Confederation of Labor also shared the difficulties of workers when having to construct in harsh weather conditions.

However, project participants need to continue to compete in labor with high determination, synchronously deploy items along the entire route to ensure the overall progress of the project.

Ngay 30.9.2025, du an da dong dien thanh cong, vuot tien do 8 thang so voi ke hoach. Anh: Manh Dung

On September 30, 2025, the project was successfully energized, 8 months ahead of schedule. Photo: Manh Dung

After successfully energizing the Lao Cai - Vinh Yen 500kV Line project and the Lao Cai 500kV Transformer Station project and the connecting 220kV lines, EVN, Power Project Management Board 1 will coordinate with relevant units on the construction site to continue completing the project to put it into official operation.

Ngay 17.10.2025, le khanh thanh Du an duong day 500kV Lao Cai – Vinh Yen duoc to chuc tai Tram bien ap 500kV Lao Cai thuoc xa Xuan Quang. Anh: Tuyet Lan
On October 17, 2025, the inauguration ceremony of the Lao Cai - Vinh Yen 500kV transmission line project was held at the Lao Cai 500kV Transformer Station in Xuan Quang commune. Photo: Tuyet Lan

Attending the inauguration ceremony, Mr. Phan Van Anh - Vice President of the Vietnam General Confederation of Labor shared: The 500kV Lao Cai - Vinh Yen Power Line Project, a national key project, is a symbol of the spirit of "Patriotism Emulation", a specific product of the emulation movement "Promoting the development of synchronous and modern infrastructure; practicing thrift and fighting waste" launched by the Prime Minister.

According to Mr. Phan Van Anh, this is a project jointly launched by the Vietnam General Confederation of Labor and EVN with the theme: "Three pioneers - Two responsibilities".

The emulation movement at construction sites has become an inspirational flame, connecting the will of tens of thousands of cadres, engineers, and workers, fostering the spirit of solidarity and determination of workers in the common aspiration of "Completing as soon as possible, safest, most effectively".

Sau khi dua vao van hanh, duong day 500 kV Lao Cai - Vinh Yen co kha nang truyen tai khoang 3.000 MW tu cac nha may thuy dien o khu vuc Tay Bac va cac tinh lan can len luoi dien quoc gia va tang kha nang nhap khau dien. Du an khong chi la cong trinh ha tang, ma con la bieu tuong cua khat vong vuon len, hien thuc hoa chu truong phat trien nang luong ben vung.
The 500 kV Lao Cai - Vinh Yen transmission line project is not only an infrastructure project, but also a symbol of the aspiration to rise up, realizing the policy of sustainable energy development. Photo: Van Duc
Bảo Nguyên
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