Tender Summary: Sewer Gabion Pipe Bridge in Karoo National Park
Objectives
The primary objective is to execute remedial sewer infrastructure works within Karoo National Park. This involves replacing three sections of the existing sewer network with new galvanized steel piping and constructing a gabion-supported pipe bridge to safely cross two watercourses. The project aims to restore functional sewage conveyance while strictly adhering to environmental conservation standards and operational protocols mandated by South African National Parks (SANParks).
Scope of Work
The contractor will replace three sections of the sewer network using 160mm galvanized steel pipes. Two sections require crossing active watercourses, necessitating the construction of a gabion pipe bridge. The scope encompasses site clearance, diversion embankments, excavation, installation of non-woven geotextile filter fabric, assembly and filling of gabion baskets with commercially sourced rock, placement of Reno mattresses, and casting in-situ concrete toppings. Additional tasks include supplying and installing pipe sections with flanges, bolts, nuts, support brackets, and executing make-good connections to existing manholes. All quantities in the Bill of Quantities are re-measurable. The work must be completed within approximately two months of contract award, following a compulsory site inspection. Subcontracting is prohibited without prior written consent.
Technical Requirements
All works must comply with the Standard Specifications for Road and Bridge Works (COLTO 1998 Edition) and SANS 1200. COLTO refers to the Committee of Land Transport Officials, which establishes national standards for road and bridge construction. Pipes must be medium-class galvanized steel with a 150mm nominal bore and 4.3mm wall thickness, manufactured per SANS 62. Gabion construction requires grade 3 filter fabric, properly tensioned wire-mesh cages, and commercially quarried stone; extracting materials within the park is strictly forbidden. Concrete must achieve a minimum compressive strength of 25MPa. Contractors must adhere to a comprehensive Environmental Management Plan (EMP) and Health & Safety Specification aligned with the Occupational Health and Safety Act and Construction Regulations 2014. Mandatory administrative compliance includes CIDB Grading Level 2 CE or higher, a valid COIDA letter of good standing (COIDA provides statutory worker injury compensation), Central Supplier Database (CSD) registration (the national procurement registry), SARS tax clearance, and B-BBEE documentation. The 80/20 preference point system applies, evaluating bids with 80% weight on price and 20% on specific socio-economic goals. Performance security must be provided within thirty days of award, and payment is processed within thirty days of invoice submission.
Skills and Competency Requirements
Bidders must demonstrate proven experience in civil construction, particularly sewer rehabilitation and gabion structure erection in ecologically sensitive environments. The contractor must appoint competent, legally compliant personnel including a Construction Manager, Health and Safety Representatives, Risk Assessors, and certified First Aiders. Expertise in implementing strict environmental controls, traffic management plans, and wildlife hazard mitigation (e.g., managing encounters with large fauna and reptiles) is essential. Familiarity with SANParks’ operational protocols, code of conduct, and ecological preservation guidelines is mandatory. Financial stability, robust project management capabilities, and the ability to accurately execute re-measurable works are required. All personnel must undergo SANParks-specific induction training covering environmental protection, safety hazards, and park regulations before mobilization. EME/QSE status (Exempted Micro Enterprise / Qualifying Small Enterprise) may be claimed for preference points, recognizing smaller businesses that meet specific turnover thresholds.