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Msikaba Bridge

The Msikaba Bridge is a cable-stayed bridge under construction in the Eastern Cape province of South Africa, spanning the Msikaba River near Lusikisiki as part of the N2 Wild Coast Toll Road upgrade project.^[1] Featuring a main span of 580 metres supported by two 127-metre-high inverted Y-shaped concrete pylons and 34 pairs of stay cables, it is designed to carry a dual two-lane carriageway with pedestrian walkways and will stand 192 metres above the gorge floor upon completion.^[2] Scheduled for completion by the end of 2025, the bridge represents a significant engineering feat, poised to become Africa's longest cable-stayed main span and the continent's third-highest bridge.^[3]^[4] Initiated in late 2019 by the South African National Roads Agency (SANRAL), the project addresses longstanding connectivity challenges in the remote Wild Coast region, reducing travel times between Durban and East London by up to three hours while boosting local economic development through thousands of direct and indirect jobs.^[5] The design, led by Danish firm Dissing+Weitling Architecture in collaboration with South African engineers, incorporates a composite steel-concrete deck 22.8 metres wide, ground-anchored back spans, and advanced features like a structural health monitoring system and wind-resistant cable arrangements tested in wind tunnels.^[3]^[6] Construction has progressed steadily, with anchor blocks completed by late 2023, pylons reaching approximately 104 metres by May 2025, and deck erection commencing in 2025, despite challenges posed by the site's rugged terrain and the need for a temporary cable car for access.^[2]^[1]^[7]^[8] Beyond its technical specifications—which include 48,500 cubic metres of concrete, 4,300 tons of reinforcing steel, and 1,090 tons of cable stays—the Msikaba Bridge holds broader significance as a symbol of infrastructure investment in underserved areas, fostering tourism, agriculture, and trade while enhancing road safety on a historically hazardous route.^[6] Valued at approximately R1.7 billion as part of the R5.7 billion for the two mega-bridges, it forms one of two mega-bridges in the 560-kilometre toll road initiative, underscoring South Africa's commitment to modernizing its national highway network amid environmental and geological complexities like the Msikaba Gorge's deep valley and rocky foundations.^[4]^[1]

Location and Significance

Geographical Context

The Msikaba Bridge is located at coordinates 31°17′45.07″S 29°47′35.74″E, approximately 23 km east of Lusikisiki in the Ingquza Hill Local Municipality of the Eastern Cape province, South Africa.^[9] This positioning places it within a remote coastal corridor along National Route 2 (N2), connecting key economic hubs like Durban and East London.^[10] The bridge spans the Msikaba River gorge, a dramatic feature plunging approximately 195 meters deep through steep, forested valleys.^[9] The surrounding Wild Coast region exemplifies South Africa's rugged coastal terrain, with sheer cliffs, wide sandy beaches, and numerous river mouths carving deep incisions into the landscape, creating a mosaic of inaccessible headlands and estuaries.^[11] Ecologically, this area is highly sensitive, forming part of the Pondoland Centre of Plant Endemism, where sandy, acidic soils support unique biodiversity, including rare floral species and dense subtropical thickets vulnerable to disturbance.^[12] The Msikaba River and its gorge lie within the historical bounds of the former Transkei homeland, established under apartheid-era policies from 1976 to 1994 as a semi-autonomous territory for Xhosa-speaking populations.^[13] During this period, the region faced severe transportation challenges, including dilapidated gravel roads, limited rail access, and inadequate infrastructure that isolated rural communities and hindered economic activity.^[14] These legacy issues of poor connectivity persisted post-reintegration into South Africa in 1994, exacerbating travel times across the rugged terrain.^[15] The bridge plays a key role in the N2 Wild Coast Toll Highway initiative to address such longstanding barriers.^[5]

Project Overview

The N2 Wild Coast Toll Highway represents a major infrastructure upgrade spanning approximately 410 km from the Mtamvuna River near Port Edward in KwaZulu-Natal to the Gonubie Interchange near East London in the Eastern Cape, aimed at modernizing a critical segment of South Africa's national road network.^[16] This ambitious project, managed by the South African National Roads Agency (SANRAL), incorporates two signature mega-bridges—the Msikaba Bridge spanning the Msikaba River near Lusikisiki and the Mtentu Bridge near Lundini—to facilitate seamless crossings over deep gorges and rugged terrain that have long impeded efficient travel.^[17] By replacing winding, accident-prone sections of the existing N2 and parallel R61 routes with a straighter, more resilient alignment, the initiative addresses longstanding bottlenecks in freight and passenger mobility along the southeastern coastal corridor.^[18] The strategic objectives of the N2 Wild Coast Toll Highway emphasize enhanced connectivity, safety, and economic vitality in one of South Africa's most underdeveloped regions. It is designed to shorten the route by about 85 km compared to the current paths, reducing travel times by 1.5 to 3 hours—particularly benefiting heavy freight vehicles between Durban and Mthatha—while mitigating risks on the notoriously hazardous existing N2, which features steep gradients and frequent accidents.^[19] Furthermore, the project is poised to stimulate regional economic development by unlocking access to isolated communities, supporting tourism, agriculture, and trade, and creating thousands of jobs during construction and beyond, thereby integrating the Wild Coast into broader national supply chains.^[20]^[21] Initiated in the early 2010s as part of SANRAL's broader toll road expansion strategy, the project gained momentum with environmental approvals and feasibility studies around 2010–2011.^[22] The Msikaba Bridge segment marked a key milestone when its construction tender was awarded in October 2018, with groundbreaking and construction commencing in January 2019, signaling the onset of on-site works for this engineering centerpiece.^[23]^[24] The Msikaba River crossing, characterized by its steep gorge and remote location, exemplifies the geographical hurdles the project navigates to achieve these connectivity gains.^[25]

Design and Engineering

Structural Design

The Msikaba Bridge features a cable-stayed configuration with a steel-concrete composite deck supported by steel stay cables anchored to two inverted Y-shaped concrete pylons, each rising 127 meters above the gorge floor. This design allows for a main span of 580 meters, enabling the bridge to cross the deep Msikaba River gorge while integrating a dual two-lane carriageway that is 22.8 meters wide, including pedestrian walkways. The pylons are back-stayed by additional cables anchored into massive concrete blocks, providing stability against the region's high winds and seismic activity.^[1]^[6] The architectural and conceptual design was led by the Danish firm Dissing+Weitling Architecture, selected by the South African National Roads Agency (SANRAL) for its proven expertise in complex, long-span bridges, such as the Nelson Mandela Bridge in Johannesburg. Dissing+Weitling's approach emphasized a minimalist aesthetic that harmonizes with the Wild Coast's rugged landscape, blending functionality with visual elegance to minimize the structure's intrusion on the natural environment. The firm's involvement covered both concept and detailed design phases, in collaboration with engineering partners like SMEC South Africa. This project has been highlighted in National Geographic's "Building Impossible with Daniel Ashville" (Season 1, Episode 2), showcasing the innovative design process.^[26]^[1]^[27] The choice of a cable-stayed design over alternatives like suspension bridges was driven by the need to accommodate the 580-meter span across an approximately 192-meter-deep gorge while reducing environmental disruption in this ecologically sensitive rural area with indigenous vegetation. Unlike suspension bridges, which require extensive mass concrete anchorages and taller towers (potentially up to 60 meters higher), the cable-stayed configuration uses simpler foundations and modular steel strand cables, allowing for less invasive construction in the steep terrain and lowering the overall material footprint. This selection also supports the broader N2 Wild Coast project goals by facilitating efficient highway integration with reduced transit times for local communities.^[6]^[26]

Technical Specifications

The Msikaba Bridge is engineered as a cable-stayed structure with a main span measuring 580 meters, establishing it as Africa's longest cable-stayed bridge by main span length. The overall structure extends approximately 800 meters, encompassing side spans and anchorages. Positioned 192 meters above the valley floor, its deck height positions it as one of the highest bridges on the continent, surpassed by the Bloukrans Bridge at 216 meters.^[3]^[6] Construction materials emphasize durability and efficiency, with 48,500 cubic meters of concrete forming the pylons, anchor blocks, and deck components. The prefabricated box girder deck requires 2,900 tons of structural steel to achieve the necessary strength-to-weight ratio for the expansive span. Additionally, 1,090 tons of stay cables support the structure, distributed across 17 pairs of main stay cables per pylon (34 pairs total for the main span), with additional back-stay cables, to evenly distribute loads.^[6] Supporting infrastructure includes 1.5 kilometers of approach roads to integrate seamlessly with the N2 Wild Coast Toll Road. The project encompasses 650,000 cubic meters of earthworks, addressing the challenging terrain of the Msikaba River gorge. The bridge's design accommodates a dual carriageway configuration with four lanes, each 3.7 meters wide, flanked by 2.5-meter shoulders, ensuring capacity for high-volume traffic while maintaining safety standards.^[28]^[28]^[29]

Procurement and Construction

Contract Award

The procurement process for the Msikaba Bridge was initiated by the South African National Roads Agency (SANRAL) in 2016 as part of the broader N2 Wild Coast Toll Highway project.^[30] The initial tender invitation, under contract SANRAL N.002-200-2016/3, sought proposals for the bridge's construction but received no fully responsive bids, prompting SANRAL to re-advertise the tender in November 2017 with a closing date in March 2018.^[31] This re-tendering ensured compliance with SANRAL's procurement guidelines, emphasizing technical feasibility and value for money. On September 20, 2018, SANRAL awarded the contract to the Concor Mota-Engil Joint Venture (CMEJV), a partnership between South Africa's Concor Holdings (a majority black-owned construction firm) and Portugal's Mota-Engil (an international specialist in bridge projects).^[23] The total contract value was R1.65 billion (approximately US$118 million at the time of award), covering the design, construction, and commissioning of the 580-meter cable-stayed bridge.^[29] The selection criteria included a functionality threshold of 70% based on bidders' technical expertise and methodology, alongside price competitiveness (80% weighting) and Broad-Based Black Economic Empowerment (B-BBEE) status (20% weighting) to promote local empowerment and skills transfer.^[32]^[33] The HVA Joint Venture, led by SMEC South Africa in partnership with CH2M and Axis, was appointed by SANRAL for detailed design oversight, contract administration, and construction supervision to ensure adherence to engineering standards and project specifications.^[1] This arrangement provided independent verification of the CMEJV's work, focusing on quality control and risk management throughout the pre-construction and implementation phases.^[34]

Construction Methods

The construction of the Msikaba Bridge employed innovative techniques to navigate the challenging 195-meter-deep gorge and rugged terrain. A key method for accessing the site during pylon construction was the installation of a temporary gondola lift system, which facilitated safe and efficient transport of workers, materials, and equipment across the gorge, reducing crossing time to approximately eight minutes compared to longer ground routes.^[35] This aerial access was essential for erecting the 127-meter-high inverted Y-shaped concrete pylons, where workers performed formwork, reinforcement, and concrete pouring in phases, often using hydraulic jacking to separate pylon legs for stability.^[2] The bridge deck, comprising a composite structure with steel box girders, utilized extensive prefabrication to minimize on-site risks and assembly time. Steel box girder segments, each measuring about 15 meters long, 22 meters wide, and weighing around 84 to 100 tons, were fabricated off-site in South African facilities using detailed 3D modeling with software like Tekla Structures and analyzed via Straus7 for structural integrity.^[35]^[2] On-site, these segments were assembled incrementally from both banks of the gorge using two specialized 160-ton bridge deck launch gantries, which lifted, rotated (by 90 degrees for alignment), and positioned the segments via the free cantilever method, starting with a reinforced concrete ladder deck base cast into the first steel segment.^[2] This approach allowed for the 580-meter main span to be built symmetrically, with transverse truss-like cross-frames connecting the dual box girders to support the two-lane carriageway. Cable installation for the cable-stayed system involved precise tensioning and anchoring procedures to ensure structural equilibrium. The bridge features 17 pairs of stay cables per side (34 pairs total), fabricated from high-strength steel strands totaling 2,500 tons, which are anchored into the pylons and extend to massive anchor blocks on each bank.^[35]^[2] Installation occurs during the erection phase, with cables set into pre-formed deviators and galleries within the anchor blocks, followed by post-tensioning using specialized hydraulic jacks to apply forces up to 500 tons per strand at 17 anchor points per block, incorporating U-shaped tendons for enhanced capacity and grouting for corrosion protection in the steep inclines.^[36]^[37] Earthworks and approach road construction addressed the unstable coastal soils prevalent in the Eastern Cape region through bulk excavation and stabilization measures. Approximately 1.5 kilometers of temporary access roads were developed on both sides of the gorge, involving up to 20 meters of deep excavations for foundations and anchor blocks, with 650,000 cubic meters of material moved, including hard rock blasting where necessary.^[35] Geotechnical stabilization techniques included layer-by-layer verification of compacted materials for road bases, interlock designs for anchor blocks with the underlying rock mass to resist lateral forces, and ongoing monitoring via drone surveys to mitigate soil instability and erosion in the coastal environment.^[38]^[39] These methods ensured durable approach viaducts integrating seamlessly with the main structure while handling the site's variable soil conditions.

Progress and Timeline

Key Milestones

The Msikaba Bridge project originated as part of the N2 Wild Coast Toll Road initiative, with planning commencing in 2011 to enhance freight transport and regional connectivity along South Africa's eastern seaboard.^[40] The detailed engineering design for the bridge was finalized by 2017, paving the way for the competitive tender process managed by the South African National Roads Agency (SANRAL). In September 2018, SANRAL awarded the R1.65 billion construction contract to the Concor-Mota-Engil Joint Venture (CMEJV), marking the transition from planning to execution. Site mobilization followed shortly thereafter in late 2018, with initial groundwork including access roads and preparatory surveys.^[23] Construction activities ramped up in early 2019, with pylon foundation work beginning that January amid challenging terrain and weather conditions. The project gained international attention through media coverage, including a feature in National Geographic's "Building Impossible with Daniel Ashville" series, which highlighted the engineering feats involved in spanning the Msikaba Gorge. However, progress was hampered in 2019 and 2020 by legal challenges from local communities contesting environmental authorizations and toll implementations, as well as funding constraints amid broader N2 Wild Coast disputes; these issues were largely resolved by early 2021 following favorable court rulings upholding SANRAL's approvals.^[29]^[41] By 2022, significant advancements included the hydraulic jacking of the south pylon legs, a critical engineering milestone that separated the structure's foundational elements for stability. Through 2023 and into 2024, the project achieved completion of the four anchor blocks and pylon bases, with pylon construction progressing to approximately 86 meters by mid-2024, while initial preparations for cable-stayed installations commenced.^[42]^[36]

Current Status

As of the latest available data from a June 2025 parliamentary report (based on a March 2025 oversight visit), construction on the Msikaba Bridge has advanced significantly, with the north pylon reaching 92 meters (72% complete) and the south pylon at 100 meters (79% complete), progressing toward their final 127-meter elevation. The first deck segment was launched in late March 2025. The bridge deck launch gantry is fully operational, facilitating the assembly of the steel deck segments, while stay cables have been delivered to the site, with initial installations commencing as the pylons near completion.^[43] The project, part of the broader N2 Wild Coast Toll Road initiative, is expected to achieve substantial completion by the 2028/29 financial year, enabling full integration into the national N2 highway network and reducing travel times between Durban and East London by up to three hours.^[43] This timeline reflects adjustments from earlier projections due to factors such as supply chain challenges for specialized materials, though no major accelerations have been reported in recent oversight updates.^[43] Safety and quality oversight is managed by the HVA Joint Venture, led by SMEC, which supervises construction activities to ensure compliance with engineering standards and worker protection protocols.^[1] Progress in 2025 has been documented through official photos and videos released by SANRAL and parliamentary oversight visits, highlighting ongoing advancements in pylon erection and deck launching amid the challenging coastal terrain.^[43]

Impact and Challenges

The Msikaba Bridge, integral to the N2 Wild Coast Toll Road project, is anticipated to substantially reduce travel times along the N2 highway between KwaZulu-Natal and the Eastern Cape, shortening the journey from Durban to East London by up to three hours through a more direct, flatter route.^[44] This enhancement in connectivity will also decrease road accidents by mitigating the risks associated with the existing route's steep gradients, sharp curves, and poor conditions, thereby improving safety for both passenger and freight vehicles.^[45]^[46] Economically, the project has generated significant employment during construction, creating approximately 8,000 direct jobs and 21,000 to 28,000 indirect jobs, with 80% of the workforce comprising local residents from the Eastern Cape.^[47]^[43]^[48] Completion of the bridge will further stimulate the regional economy by boosting eco-tourism along the Wild Coast, where improved access to pristine coastal areas is expected to attract more visitors and support local businesses.^[21] Additionally, it will facilitate efficient freight transport, benefiting agriculture through faster movement of livestock and produce, as well as mining activities by reducing logistics costs and enhancing market access for raw materials.^[49]^[50] On the social front, the bridge will alleviate isolation in rural Wild Coast communities by providing reliable access to essential services, including healthcare facilities and educational institutions, which are currently hindered by inadequate road infrastructure.^[43] This improved mobility will empower residents, particularly in underserved areas, to engage more fully in economic opportunities and social networks beyond their localities.^[48] Overall, these benefits position the Msikaba Bridge as a key contributor to South Africa's National Development Plan, advancing infrastructure-led inclusive growth and regional equity.^[51]

Environmental and Engineering Challenges

The construction of the Msikaba Bridge has encountered significant environmental challenges due to its location in the ecologically sensitive Wild Coast region of South Africa's Eastern Cape province. The project area falls within the Pondoland Centre of Endemism, a biodiversity hotspot encompassing approximately 1,885 km² and hosting around 200 endemic plant species, including endangered ones such as the Pondoland Conebush (Leucadendron pondoense) and Pondo Coconut (Jubaeopsis caffra).^[52] These species face risks from habitat fragmentation and loss caused by bridge foundations and access roads encroaching on the Msikaba River gorge ecosystem, which supports unique wetlands, grasslands, and riverine habitats critical for local biodiversity.^[52] Additionally, the broader N2 Wild Coast Toll Road development has raised concerns over threats to sacred sites like the Isinuka and Sibhenga pools, used for cultural rituals, potentially impacting cultural and spiritual practices alongside ecological degradation such as soil erosion and water pollution.^[52] To address these issues, comprehensive environmental impact assessments (EIAs) were conducted prior to 2017, with the initial EIA in 2004 rejected for lacking independence and a revised one approved in 2010 by the Department of Environmental Affairs.^[53] Mitigation strategies included search-and-rescue operations for rare plants from September 2016 to February 2017, translocation of endangered species to protected nurseries, and habitat rehabilitation plans in collaboration with the South African National Biodiversity Institute and Eastern Cape Parks and Tourism Agency.^[53] Offset agreements were also established to conserve equivalent biodiversity areas, ensuring minimal net loss to the region's endemic flora and fauna.^[53] Engineering challenges stem from the site's rugged topography in a seismically active zone with unstable soil conditions and extreme weather. The Msikaba Gorge's steep inclines and fractured rock formations posed risks of soil instability, addressed through deep anchor block foundations—each 49 m long, 10 m wide, and 17 m deep, interlocked with in-situ rock for enhanced lateral stability and seismic resistance.^[1] Seismic activity in the Eastern Cape, including potential for moderate earthquakes, necessitated adaptive structural monitoring via Internet of Things (IoT) sensors to detect and respond to ground movements in real time.^[54] High winds, frequently exceeding 80 km/h in the gorge, threatened construction and operational stability, mitigated by extensive wind tunnel testing to optimize the cable-stayed design's aerodynamics and the use of high-strength, corrosion-resistant structural steel in the composite deck to withstand coastal exposure.^[1]^[55]^[56] Project delays from 2019 to 2021 were exacerbated by community protests, funding constraints, and the COVID-19 pandemic, halting progress on the broader N2 Wild Coast Toll Road program. Community unrest, particularly over perceived cultural disruptions and inadequate consultation, led to work stoppages similar to those at the adjacent Mtentu Bridge site in 2018–2021.^[57]^[58] The COVID-19 lockdown imposed a construction moratorium in 2020, while funding shortages arose from contractor terminations and tender irregularities, prompting SANRAL to re-tender and secure government backing.^[59]^[60] These issues were resolved through legal settlements addressing interdicts, extensive stakeholder engagements including a 2022 imbizo with traditional leaders, and additional government funding allocations to restart activities by late 2021.^[43]^[57] However, as of March 2025, the project remains only 40% complete, with completion now projected for the 2028/29 financial year due to ongoing supply chain and international trade challenges, further postponing anticipated economic and social benefits.^[43]

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Sep 23, 2021 · There is the job creation benefit. Work on the N2 Wild Coast Project will lead to the creation of 8,000 direct full-time jobs and between ...
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#DidYouKnow, that so far, the Msikaba Bridge project has benefitted ...
Jan 27, 2025 · DidYouKnow, that so far, the Msikaba Bridge project has benefitted 44 local suppliers, 48 service providers and 61 subcontractors with over ...
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N2 Wild Coast Toll Road development | South Africa - Zutari
The N2 Wild Coast Toll Road development project falls within the Ingquza Hill Local Municipal area of the OR Tambo Municipal District in the Eastern Cape.
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Infrastructure development and environmental risk perceptions in ...
The Wild Coast region is located in the Eastern Cape province of South Africa. The area lies between the Great Kei River in the South and the Mthamvuna River in ...Missing: gorge | Show results with:gorge
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Controversial Wild Coast Toll Road: Environment will be first priority
Sep 29, 2016 · A second EIA assessment was conducted and in 2010 the Department of ... The project also includes two mega-bridges across the Msikaba and Mtentu ...
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IoT at Msikaba Bridge - SMEC
To read more about the Msikaba Bridge project, click here. View the full schedule of sensor types deployed at Msikaba Bridge. Download our technical paper ...
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Iconic Msikaba Bridge makes steady progress - Crown Publications
Feb 10, 2023 · The first 24 m of the deck on either side of the gorge is a reinforced concrete ladder deck that is cast into the first steel deck segment, ...
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Msikaba project harnesses local steel - Engineering News
Jul 7, 2023 · Among other products, the bridge is being fabricated using “world-class” heavy gauge structural steel sections from the ArcelorMittal Rail and ...
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CROSSING BOUNDARIES - Engineering News
Jan 19, 2024 · There were also delays in the construction of the Msikaba bridge because of Covid-19, and the contract was also impacted on by delays caused by ...
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Communities, SMMEs main beneficiaries of Msikaba Bridge ...
Sep 23, 2021 · This as work at the project's Mtentu Bridge construction site was halted due to community unrest. President Ramaphosa said although ...Missing: 2019-2021 funding
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Work Begins on South Africa's 'Mega-bridge' Project
Sep 9, 2020 · The agency said that the Covid-19 pandemic has caused some delays to the project but activities have now resumed following the easing of ...Missing: 2019-2021 | Show results with:2019-2021
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Almost inconceivable' cancellation of Sanral projects to lead to ...
The cancellation of R17.47-billion in tenders by the South African National Roads Agency Limited (Sanral), will lead to major delays in the execution of these ...Missing: legal | Show results with:legal