Over half a century, Construction Joint Stock Company 47 (CC47) has created a trail of pioneering milestones: the first enterprise in Vietnam to own a TBM, opening the era of modern tunnel construction; the first in Vietnam to apply RCC in irrigation and hydropower projects; the contractor of Bac Ai Pumped Storage Hydropower Plant – the first pumped storage project in Vietnam and the largest in Southeast Asia. And in this 50-year journey of achievements, at the Hoa Binh Hydropower Expansion project, CC47 has written yet another milestone: constructing the largest-diameter water diversion tunnel in Vietnam.
The Hoa Binh Hydropower Expansion – a national key project approved by the Prime Minister under Decision 389/TTg – awarded package 1XL-HB worth over VND 3,100 billion to the consortium of Construction Joint Stock Company 47 – Truong Son Construction Corporation – Lilama 10 JSC. Within this, CC47 plays the leading role in underground works, requiring the highest level of engineering and construction organization.
With a total length of 1,500m and a diameter of 11m, this is the largest-diameter hydropower tunnel in Vietnam. It is a landmark project, posing tremendous geological and engineering challenges, and at the same time a testament to CC47’s capability and resilience in mastering the most difficult tasks.
Water diversion tunnel of Hoa Binh Hydropower Expansion – the largest in Vietnam (Photo source: EVNPMB1)
At the Hoa Binh site, CC47 has completed major items such as a 141.46m-long spillway tunnel, a 461m-long auxiliary tunnel, excavation of the tunnel arch and tunnel foundation, with a total excavation volume exceeding 740,000 m³. Each figure is evidence of unyielding courage, daring to face the harshest geological and construction challenges – a quality deeply engraved in CC47’s half-century journey.
CC47 constructing the spillway tunnel – Hoa Binh Hydropower Expansion Project.
CC47 constructing the water diversion tunnel – Hoa Binh Hydropower Expansion Project.
The success at Hoa Binh Hydropower Expansion affirms the cultural value of resilience, readiness to face challenges, and determination to rise with CC47’s indomitable spirit. It also highlights the company’s pioneering imprint in its 50-year journey, marking “golden milestones” that set new standards in Vietnam’s construction industry.
Half a century of development has been a steadfast journey, laying a strong foundation for CC47’s greater strides ahead. In the era of national advancement, the company aims to conquer key fields such as renewable energy, irrigation, and transport infrastructure – affirming the Vietnamese brand on the international stage. The 50-year journey is not only a proud milestone but also a message to future generations of leaders that: “Every great success begins with thorough preparation and a solid foundation.” With the aspiration of “Breakthrough Transformation – Reaching International Heights,” CC47 is ready to continue writing new, promising chapters.
C47