PLANNING AND DESIGN OF THE TRANSFER TUNNEL FOR THE LESOTHO-HIGHLANDS-WATER-PROJECT

Authors
BONIFACE A MCKELVEY JG NTHAKO S
Citation
A. Boniface et al., PLANNING AND DESIGN OF THE TRANSFER TUNNEL FOR THE LESOTHO-HIGHLANDS-WATER-PROJECT, Tunnelling and underground space technology, 9(1), 1994, pp. 79-89
Citations number
NO
Categorie Soggetti
Engineering, Civil","Construcion & Building Technology
Journal title
Tunnelling and underground space technology → ACNP
ISSN journal
08867798
Volume
9
Issue
1
Year of publication
1994
Pages
79 - 89
Database
ISI
SICI code
0886-7798(1994)9:1<79:PADOTT>2.0.ZU;2-R
Abstract
The Transfer Tunnel forms part of Phase IA of the Lesotho Highlands Wa ter Project. The tunnel has a length of 45 km, an excavated diameter o f 5 m, and is situated at an altitude of nearly 2000 m above sea level . Directly connected to an underground power station, it is probably t he longest headrace tunnel in the world. The tunnel is being excavated through basalt and runs in a northerly direction from an intake struc ture sited on the Malibamatso River, approximately 100 km east of Mase ru. The paper describes the planning and design of the tunnel from the Project Optimization stage to the present.