Construction Of Greenhouses and Tree Nurseries Around the Volcanoes National Park Tender at International Gorilla Conservation Program (IGCP)

• Tender reference number: 06/05/CGTN/FY26
• Procuring Entity: International Gorilla Conservation Programme (IGCP)
• Procurement Method: National competitive bidding

Background

The International Gorilla Conservation Program (IGCP) is a coalition of three leading international conservation organizations (Conservation International, Fauna & Flora and WWF) which was formed with the mission to protect the mountain gorillas and their habitat in the Democratic Republic of Congo, Rwanda, and Uganda. The programme works in close partnership with the Protected Area Authorities of the three countries; Institute Congolais pour la Conservation de la Nature (ICCN) in Democratic Republic of Congo (DRC), Rwanda Development Board (RDB) in Rwanda and Uganda Wildlife Authority (UWA) in Uganda. 

International Gorilla Conservation Programme (IGCP) is implementing community projects to strengthen ecosystem-based adaptation and conservation efforts. These initiatives support park-edge communities around Volcanoes National Park (VNP) in Rwanda to enhance climate resilience, ecosystem protection and restoration, mitigate zoonotic disease, thus contribute to community wellbeing and sustainable mountain gorilla conservation. 

In this regard, IGCP hereby invites bids from eligible national, competent and reputable bidders who have Electronic Billing Machine, to submit their offers for this tender. This call for proposals (CFP) is open on equal terms to all qualified companies fulfilling the requirement and registered in Rwanda. 

Since the greenhouses and tree nurseries will be managed daily by community members around VNP and directly benefit them, the contractor will be required to work with IGCP-partner Community Based Organizations (CBOs) during the establishment process, whenever possible. This approach aims to strengthen local capacity, foster community ownership and ensure long-term project sustainability.

Tender specifications 

The assignment involves structural design, material supply, construction and technical training regarding maintenance of greenhouse structures and tree nurseries in 12 Sectors from 4 Districts adjacent to VNP: Burera, Musanze, Nyabihu and Rubavu. The greenhouses and tree nurseries are intended for demonstration and commercial production purposes under protected agriculture conditions, fully equipped and ready for intensive vegetable production. To ensure efficiency, the tender is divided into separate lots as outlined below.

Lot 1: Design & Bill of Quantities (BOQ)

• Site analysis
• Structural design of greenhouses and nurseries.
• Preparation of detailed BOQ (materials, labor, equipment)with cost estimates. 

Lot 2: Supply of construction materials

• Supply of greenhouse frames, nursery structures, irrigation equipment, water storage facilities, shading nets, seedling trays, and related materials necessary to ensure the greenhouses are fully operational and compliant with the technical specifications provided in the tender document.
• Delivery to designated project sites.

Lot 3: Construction and installation works

• Assembly and installation of greenhouses and nursery infrastructure.
• Installation of irrigation and water management systems.
• Quality assurance and compliance with safety standards.

Lot 4: Technical training and capacity building

• Training sessions for community members and project staff on greenhouse management, nursery operations, and sustainable practices.
• Development of training manuals and sustainability guidelines.
• Ongoing mentorship and technical support.

Greenhouses technical specifications 

1. Description

Four (4) identical greenhouse structures at 2 different sites (Nyabihu-Kabatwa and Rubavu-Bugeshi) in Western province, each measuring 8 meters x 30 meters (240 m² per unit), fully equipped and ready for crop production, including irrigation and water storage system.

The greenhouse shall be designed for intensive vegetable production under protected agriculture conditions with all four greenhouses complying with the same technical specifications explained in this document

2. Dimensions 

• Type: Single Bay Greenhouse
• Width: 8 meters
• Length: 30 meters
• Total Area: 240 m²
• Gutter Height: 2.8 – 3.5 meters
• Minimum Center Height: 5.5 meters
• Ventilation: Fixed top ventilation
• Side Ventilation: Manual roll-up system on both sides

3. Structural Frame requirements

All structural components must be made of high-quality galvanized steel to ensure durability and resistance to corrosion.

3.1 Vertical Posts

• Type: Circular hollow galvanized steel
• Diameter: 48–50 mm
• Thickness: 2 mm
• Quantity: 22 pieces

3.2 Arches

• Material: Galvanized circular hollow steel
• Diameter: 38–40 mm
• Thickness: 2 mm
• Quantity: 11 pieces

3.3 Internal & External Support Cables

• Material: Galvanized steel
• Thickness: 3–5 mm
• Total Length: 165 meters
• Use: Internal and external structural reinforcement

4. Greenhouse Covering Materials

• Roof Cover

• Material: UV-treated greenhouse polyethylene film
• Thickness: 200 microns
• Coverage: Approximately 700 m²

4.2 Side Netting

• Material: Insect-proof net
• Mesh Size: 50 mesh
• Shade Effect: 25%
• Coverage Area: Approximately 320 m²
• Must allow airflow while preventing pest entry

5. Water Management System

5.1 Rainwater Harvesting Gutters

• Material: PVC
• Diameter: 170–180 mm
• Installed on both sides
• Quantity: 11 pieces

5.2 Water Storage Tank and Stand

• Tank capacity: 5000 Liters
• Tank stand:
  • Height: 2 meters
  • Structure: Steel frame (60x40mm, 40x40mm, 20x20mm sections)
  • Coated against corrosion
• Includes welding works and secure anchoring

6. Irrigation System

The greenhouse must be supplied with a completedrip irrigation kitsuitable for 240 m².

Specifications:

• Drip tape thickness: 8 mil or above
• Maximum flow rate: 12 m³/hour
• Maximum working pressure: 8 bar
• Includes:
  • Irrigation filter
  • All required connectors and accessories
  • Valves and pressure control components
  • Full installation and testing

With the system must ensuring uniform water distribution across all planting rows.

7. Crop Support System (Trellising)

• Square galvanized posts: 50mm x 50mm
• Thickness: 2 mm
• Quantity: 40 pieces
• Includes:
  • Aluminum supports
  • One roll of galvanized wire for trellising

Designed to support climbing crops such as tomatoes and cucumbers

8. Ventilation & Access System

8.1 Manual Side Roll-Up System

• Installed on both sides
• Allows temperature control and air circulation

8.2 Entry Porch

• Double door system
• Size: 8000mm x 1800mm
• Lockable door
• Designed to reduce pest entry

9. Table summarized technical specifications 

Tree nursery specifications

1. General Description

The nursery structure shall provide a protected environment suitable for tree seedling propagation, protecting seedlings from excessive sunlight, pests, and harsh weather conditions, with the following dimensions:

• Width: 15 meters
• Length: 20 meters
• Total Area: 300 m²
• Pole Height: 2 – 2.3 meters

2. Structural Framework

2.1 Main Structural Frame (Steel)

The primary structural framework shall be constructed using galvanized steel columns to ensure durability and resistance to corrosion.

Specifications

• Material: Galvanized steel pipes
• Main vertical columns: Minimum 60 mm diameter steel pipe
• Steel thickness: Minimum 2 mm
• Height above ground: 2 – 2.3 meters

Foundation and Anchoring

• Steel columns must be embedded into concrete foundations
• Minimum depth: 50 cm below ground level
• Concrete base: Minimum 30 cm × 30 cm × 50 cm
• Concrete grade: C20 or equivalent

Structural Stability

• Proper spacing to ensure structural stability
• Installed in the way that improves lateral stability and wind resistance of the structure.
• All steel components must be properly aligned and securely fixed.

2.2 Roof members and rafters

To facilitate easy maintenance and replacement, the roof support members shall be constructed using treated hardwood timber. The timber shall be anti-termite treated, well-seasoned, and free from structural defects, with a suitable rafter section and purlins with a suitable spacing to ensure adequate structural support. The wooden rafters shall be securely fixed to the steel columns or steel beams to ensure strong and stable connections while allowing easy removal and replacement of timber.

3. Body Structure Covering

3.1 Insect Shade Net

• Type: Insect-proof shade net
• Coverage Area: 550 m²
• Material: UV-treated polyethylene
• High durability (minimum 5 years)
• Properly tensioned and firmly fixed to frame
• Must provide protection against insects and excessive sunlight

4. Perimeter Protection

4.1 Wire Fence

• Height: 1.8 meters
• Length: 85 linear meters
• Material: Galvanized steel wire mesh
• Installed around the nursery perimeter
• Firmly fixed with treated wooden or metallic posts
• Purpose: Protection against animals and unauthorized access

5. Water Supply System

5.1 Water Storage Tank

• Capacity: 5,000 Liters
• Material: Plastic (high-quality UV-resistant plastic) including accessories like tap
• Provided with a stand
• Stand must be stable and capable of supporting full tank weight

Sites visit

REQUIREMENTS: 

The bids should be accompanied by the following documents:

1. Certificate of Incorporation or Certificate of Registration.
2. Valid Trading license
3. Tax Clearance Certificate
4. RSSB Clearance Certificate
5. Names of owners /Authorized Company Representative
6. Sole proprietor businesses MUST attach a copy of the national ID and TIN of the proprietor.
7. Three (3) Similar Work Completion Certificates /References.

HOW TO BID / TO APPLY

All bids’ documents, clearly indicating the lot, must be consolidated into a single PDF file and submitted electronically via the email procurement@igcp.organd copy ronek@igcp.org no later than May 29, 2025, at 11:59 pm – Kigali Time. 

Late bids will be rejected and if a company bids on more than one lot, her/his bids should be submitted separately. IGCP reserves the right to reject any bid deemed inappropriate.