A Pumped Storage Hydro Power Plant is currently being constructed near the community of Hatta in the Hajar Mountains, situated approximately 140 km southeast of Dubai. The project entails utilizing the existing Saad Hatta Al Awwal Dam as the lower reservoir, while the upper reservoir will be positioned roughly 150 meters higher. These reservoirs will be interconnected via a 1.2 km long pressure tunnel.
To facilitate the construction, the upper reservoir will feature two roller-compacted concrete dams, standing at heights of approximately 35 meters and 70 meters respectively. Additionally, a powerhouse will be established, housing two units capable of generating a combined net power output of 250MW during a 6-hour generation cycle.
Furthermore, the project encompasses the construction of two road tunnels, measuring around 470 meters and 440 meters respectively, employing blast excavation techniques. The development also includes the creation of reinforced outflow and intake structures, several ancillary buildings, as well as the installation of mechanical and electrical systems.
In recognition of the challenging access areas involved in the high-level works, Spider Access was awarded the project in 2020-2021. Their expertise in utilizing a combination of specialized methods such as lead rock climbing/mountaineering and rope access techniques, along with a trained and skilled team, proved instrumental in ensuring successful execution of the project in these difficult-to-reach locations.
SCOPE OF WORK
Throughout the project, Spider Access encountered numerous challenges, with the most notable ones including:
- Ensuring safe access to work positions.
- Mitigating the risks associated with falling objects.
- Safely lifting heavy equipment.
- Managing the movement of substantial amounts of soil and rocks while considering the continuous flow of construction traffic beneath the work areas.
These works took place in the natural environment of the Hajar Mountains, which is characterized by irregular landscapes and significant weathering of the bedrock. Consequently, the presence of loose stoneson the slopes posed a stability risk.
To overcome these challenges, the Spider Access team utilized lead rock climbing and mountaineering techniques to reach inaccessible areas. Solid bedrocks were selected as anchor points in accordance with IRATA standards. Prior to installing the anchor points, a geologist from the Spider Access team conducted a thorough geological survey to identify the most suitable positions. The focus was on selecting non-weathered solid rocks with minimal open cracks and metamorphic alterations.
Heavy equipment lifting and rescue drills were executed using tension lines for rigging, hauling systems, and petrol-powered winches. Special traffic management procedures were implemented at the work area to minimize the risk of hazardous rocks falling onto the road.
Spider Access successfully addressed these challenges by applying specialized techniques and adhering to strict safety measures. Their comprehensive approach ensured the project’s progress while effectively managing the unique conditions presented by the Hajar Mountains’ landscape.
TEAM
In order to accommodate the diverse scope requirements of the contract and ensure adherence to safety standards, Spider Access maintains a highly competent and versatile on-site team with expertise spanning multiple disciplines. Our team members possess the following credentials:
- Project Management: Our team includes a Ph.D. holder in Geology with extensive experience in Engineering Geology and Geological Survey. This individual has also demonstrated proficiency in managing large-scale rope access projects, effectively overseeing both operational and safety aspects.
- HSE Engineers & Officers: We have qualified professionals holding certifications in NEBOSH and IOSH. These individuals play a crucial role in ensuring strict compliance with our established safety policies and procedures throughout the duration of the project.
- Supervision & Technicians: Our team comprises supervisors and technicians who have received training at various levels. We deploy rope access teams that hold IRATA certification, and we further enhance their skills by providing IPAF and PASMA certifications.
This strategic approach has yielded remarkable success, enabling us to optimize manpower distribution, effectively cover all project scopes, and assist the client in cost optimization. Notably, our rope access team credentials include:
- Multi-skilled individuals certified at IRATA Level 1
- Multi-skilled individuals certified at IRATA Level 2, with additional certifications in IPAF and PASMA
- IRATA Level 3 supervisors with IPAF and PASMA certifications. It is important to mention that all our supervisors are also trained in First Aid, further augmenting their capabilities in emergency situations.
By maintaining a highly qualified and well-rounded team, Spider Access ensures the successful execution of the project while upholding the highest standards of professionalism and safety. Our diverse range of expertise allows us to address the project’s unique challenges and provide exceptional service to our clients.
ACCESS METHODOLOGIES
- Lead climbing using a combination of UIAA and IRATA procedures.
- Rope Access (EN 795 certified anchor points, BS 7883:201 tested).
CONCLUSION
In conclusion, the construction of the Pumped Storage Hydro Power Plant near Hatta in the Hajar Mountains has been a challenging yet successful endeavor undertaken by Spider Access. The project involved utilizing existing infrastructure and constructing new elements such as reservoirs, dams, a powerhouse, road tunnels, and various structures. Spider Access was awarded the high-level works due to their expertise in accessing difficult areas using specialized techniques like rock climbing and rope access. Despite the complex terrain and safety risks, Spider Access effectively addressed challenges related to access, falling objects, heavy equipment lifting, and managing construction traffic. Their highly skilled team, including geologists, project managers, HSE engineers, supervisors, and technicians, played vital roles in ensuring safety, adhering to standards, and overcoming obstacles. With their commitment to professionalism and expertise in various disciplines, Spider Access successfully executed the project and delivered exceptional results.
