Projects

Three landmark sites. Two systems we brought to Nepal.

Rockfall barriers and earth anchors, designed, supplied and installed by GSI where failure is not an option.

Rockfall protection · Sindhupalchowk

Upper Bhotekoshi Hydroelectric Project

Rockfall barrier running along the steep gorge wall at Upper Bhotekoshi
Barrier line along the gorge
Excavator placing a barrier post on the Bhotekoshi slope
Post installation
GSI crew drilling anchors for the barrier foundations
Foundation anchor drilling

The Upper Bhote Koshi run-of-river scheme sits in a steep gorge on the Bhote Koshi, a tributary of the Sun Koshi. GSI designed, supplied and installed the rockfall protection system that shields the project’s infrastructure and people from falling rock.

Client
Bhote Koshi Power Company Pvt. Ltd.
Location
Sindhupalchowk
Scope
Design, supply and installation
System
Rockfall protection

Rockfall protection · EPC · Dolakha

Upper Tamakoshi Hydropower Project

Flexible rockfall barrier above the take-off yard at Gongar
Flexible barrier above the take-off yard, Gongar
GSI crew fixing ring-net panels to the Tamakoshi barrier
Ring-net installation

One of Nepal’s largest hydropower projects, in steep and highly seismic terrain. Above the take-off yard at Gongar, GSI designed, supplied and built a flexible rockfall barrier system as part of the slope stabilization works, protecting the installation and its personnel.

Client
Upper Tamakoshi Hydropower Ltd.
Location
Gongar, Dolakha
Scope
Design, supply and construction
System
Flexible rockfall barrier

Earth anchors · Landslide countermeasure · Kathmandu

Nagdhunga Tunnel Project

Completed anchored slope above the Nagdhunga Tunnel west portal
Completed anchored slope, west portal
Scaffolding erected for anchor drilling on the Nagdhunga slope
Drilling scaffold
GSI crew working on the anchor drilling platform
Anchor installation

On the main road into Kathmandu, the west portal of the Nagdhunga Tunnel needed a permanent fix for an unstable slope. GSI carried out the west landslide countermeasure works, supplying and installing earth anchors and slope protection, with DTH drilling up to 45 m.

Client
Hazama Ando Corporation
Location
Nagdhunga, Kathmandu
Scope
Supply and installation
System
Earth anchors, slope protection

Project atlas

From Mahakali to Ilam.

Where GSI has worked across Nepal. Select a site on the map or in the list.

Map of Nepal showing GSI project locations
Flagship projectOther projectGSI office, LalitpurBoundary as per the official map of Nepal (2020)Locations are approximate

Beyond Nepal

UgandaRockfall protection system design

SingaporeGeological core drilling for Nanyang Technological University, since 2013

Selected work

Hydropower, highways, housing and whole river basins.

More projects from the 2026 company profile.

Slope protection works at the Mai Beni surge tank areaSlope · EPC

Ilam · 9.5 MW

Mai Beni Hydropower Project

Design, supply and installation of slope protection works at the surge tank area.

Samling Power Company Ltd.

Cut slope mitigation at Manav Sewa Ashram, BesisaharLandslide

Besisahar, Lamjung

Manav Sewa Ashram

Landslide mitigation for a cut slope at a building construction site.

Manav Sewa Ashram

Horizontal drains drilled at Chhaling Eco-housingGroundwater

Bhaktapur

Chhaling Eco-housing

Wells and horizontal drains drilled in rock by DTH. The area is now dry and creep has stopped.

Chhaling Land Development Site

Dudh Koshi river basin slopesMulti-hazard

Dudh Koshi River Basin

Dudh Koshi River Basin Study

Deep-seated slope deformation mapping and GIS decision-tree analysis for multi-hazard risk.

Asian Development Bank and Nepal Electricity Authority

Slope protection on the Kathmandu–Terai Fast TrackSlope

Kathmandu–Terai Fast Track

Fast Track Project, Package 3

Slope protection works on Package 3 of the expressway.

Slope stabilization on the Mahakali HighwaySlope

Buditola Bhabar

Mahakali Highway slope stabilization

Slope stabilization works on the Mahakali Highway.

Key project register

No.Project and scopeTypeClient
01Rockfall protection system, Upper Bhotekoshi Hydroelectric ProjectRockfallBhote Koshi Power Company Pvt. Ltd.
02Flexible rockfall barrier above the take-off yard at Gongar (slope stabilization works)RockfallUpper Tamakoshi Hydropower Ltd.
03West landslide countermeasure works, Nagdhunga Tunnel Construction ProjectEarth anchorsHazama Ando Corporation
04Slope protection at the surge tank area, Mai Beni Hydropower Project (9.5 MW)SlopeSamling Power Company Ltd.
05Rockfall protection systems in the Siddhababa area, Siddhartha Highway (volunteered by GSI)RockfallDepartment of Roads, Government of Nepal
06Tower Slope Stabilization of Rasuwagadhi Hydroelectric Project Transmission LineSlopeRasuwagadhi Hydropower
07Slope protection works at the Manav Sewa Ashram building site, Besisahar, LamjungSlopeManav Sewa Ashram
08Pre-feasibility study of road-access tunnels: Dang Valley–Rapti Valley, and Bankas Bash (Kapilvastu)–Kalakate (Dang/Arghakhanchi)StudyMULTI-FBC-GES with ECoCoDE Nepal
09Melamchi headworks damage assessment and catchment hazard mapping: multi-hazard field surveys and landslide studyHazardAsian Development Bank
10Flood risk assessment and build-back-better planning after the 2021 flood, Melamchi, Sindhupalchowk (RFP No. MMSI/DRP/79-01)HazardMelamchi Municipality
11Slope mitigation plan, Ch. 46+600, Mugling–Abukhaireni–Pokhara RoadSlopeMeinhardt Singapore Pvt. Ltd., Nepal Branch
12Groundwater management system installation, Chhaling Land Development SiteGroundwaterChhaling Land Development Site
13Multichannel Analysis of Surface Waves (MASW), Jagdulla Storage Hydroelectric ProjectGeophysicsNEA Engineering Company Ltd.
142D electrical resistivity tomography survey, Kimathanka Arun HEP, Sankhuwasabha (NEC/SQ/074-075-12)GeophysicsNEA Engineering Company Ltd.
15Slope protection at Dusit Thani Himalaya Resort, NamobuddhaSlopeGS Engineering and Construction Company Pvt. Ltd.
16Soil characterization study of Swayambhu Hill for slope stabilizationInvestigationUNESCO
17Geotechnical core drilling at Bardibas, MahottariInvestigationEarth Observatory of Singapore, Nanyang Technological University
18Geological investigation, Sapta Koshi High Dam Multipurpose Project and Sun Koshi Storage-cum-Diversion SchemeInvestigationN.K. Buildon Pvt. Ltd.
19Initial risk assessment of earthquake-induced landslides, JajarkotHazard—