Sapphire Jubilee Bridge-Tunnel
The Sapphire Jubilee Bridge-Tunnel is a 233.73-kilometer combined bridge and tunnel connection under construction between Buenaventura in South Lyrica and Estefania in the Islas de la Libertad, Nouvelle Alexandrie. Approved by the Federal Assembly in 1748 AN with a budget of NAX€26.8 billion, the project officially began construction on 1.I.1750 AN as the flagship infrastructure initiative of the nation's Sapphire Jubilee, marking 65 years since the federation's founding. The connection consists of 142.73 kilometers of bridge sections and 91 kilometers of tunnels, including a 67-kilometer main tunnel passing beneath the international shipping lane, making it one of the longest underwater tunnels on Micras.
The project extensively utilizes Wechua concrete, a traditional construction material known for exceptional water resistance and compressive strength, requiring approximately 6.8 million cubic meters for the tunnel sections alone. Eight artificial islands serve as ventilation stations and bridge-tunnel transition points, with the largest, Isla Navegación, spanning 22 hectares and housing a maritime control center. When completed in 1755 AN, the bridge-tunnel will accommodate six lanes of vehicular traffic, two high-speed rail lines, emergency lanes, and pedestrian paths on bridge sections, reducing transportation time between the regions by 60 percent while maintaining uninterrupted passage for international shipping traffic through one of the region's busiest maritime corridors.
