Mexico City Drainage Network

Project context

Mexico City's aging combined sewer system in the Cuauhtémoc and Benito Juárez boroughs required rehabilitation across 32 segments totalling 5,400 meters. Surface access was restricted by dense urban infrastructure including subway tunnels, market streets, and listed colonial buildings. Cost efficiency was critical given the project scale, ruling out premium UV-CIPP for the entire scope.

Our solution

Huatao supplied dry felt tube liners impregnated with unsaturated polyester resin — the cost-optimal solution for large-diameter drainage where pH is near-neutral. Steam-cured inversion installation handled segments up to 300 meters in single operations, and the integrated pneumatic inversion system allowed rapid transition between inversion and curing phases. CCTV pre-inspection and dredging robotics handled pretreatment.

Outcomes

• 5,400 meters across 32 segments rehabilitated cost-effectively
• 14-week project schedule maintained despite urban access constraints
• Single-operation installations up to 300 meters reduced manhole-to-manhole logistics
• Polyester resin provided full structural rehabilitation at half the cost of vinyl ester
• Zero subsurface utility incidents
• Local contractor crews trained on Huatao inversion equipment