Description of the Similarity

Prepare all surveys, studies, design, and required project documents.

Water:

• Drilling of the four wells.
• Supply and installation of two pumps.
• Supply and installation of pipes for water conveyance inside the pump station.
• Works included related ancillary elements such as valves, chambers, and meters.

Built Environment:

• Construction of boundary walls for each well.
• Construction of operator rooms.
• Construction of electricity generator rooms.
• Quality control activities.

Amount

Water:

• The total cost of the water network works is USD 89,800.

Built Environment:

• Construction cost of the boundary walls is USD 16,200.
• Buildings: USD 32,100.

Physical Size

Water:

• The four wells are of dimensions 25 m², depth 15 m, and net length 16 m.
• The walls are of height 1.9 m and length 1.2 m for each.
• The operator rooms are of area 18 m².
• The electricity generator rooms are of area 16 m².
• The two pumps are featured with 120 m head and 25 m³/hour flow each.
• The pipes are of diameter 3 inch and 60 m length for water conveyance inside the pump station.

Complexity

• High surface water level, which led to continuous water drainage.
• Poor soil type, which required soil reinforcement during excavation.
• The well was deep, requiring equipment and personnel to be sent down without affecting the project timeline.
• The initial pipeline design interrupted lands that required expropriation, so the horizontal and vertical pipeline was redesigned.
• Adverse weather conditions occurred during the rain season in Socotra from May to October.
• Ships do not enter the island for five months.

Methods / Technology

• Used the traditional method.
• Used heavy equipment in drilling.
• Working hours were arranged in three shifts.
• Used suction pumps to remove surface water.

Other Characteristics

N/A