On the Pamirss Plateau, snow-capped peaks pierce the clouds, vast stretches of Gobi desert extend to the horizon, crystal-clear skies meet boundless wilderness, and nature’s grandeur shapes the distinctive character of the “Stone City in the Clouds.”

At the westernmost edge of China, builders working on the Taxkorgan Wastewater Treatment Plant Project in Xinjiang, undertaken by China Railway Municipal Engineering under China Railway Engineering Investment, are constructing a modern environmental protection facility at an average altitude of 4,000 meters. Since the second quarter of this year, the project team has seized the short construction season, overcoming fierce winds, sandstorms, oxygen deprivation, and harsh natural conditions. Through technological innovation, rigorous safety management, unwavering quality control, and accelerated construction efforts, they have woven a strong ecological safeguard across the plateau, contributing a vivid chapter to the development of a Beautiful Xinjiang.

Taking Root on the Pamirs Plateau

An average elevation of 4,000 meters may offer breathtaking scenery for visitors, but for builders it is a demanding battleground. In Taxkorgan County of Kashgar Prefecture, known as the “Stone City,” oxygen levels are only about 60 percent of those on the plains. Even a brisk walk can leave newcomers dizzy and short of breath. Yet it is here that the builders are taking on the limits of nature.

The Taxkorgan Wastewater Treatment Plant Expansion Project is far from ordinary. It includes a new wastewater treatment facility with a daily treatment capacity of 10,000 tons, two reclaimed-water reservoirs with a combined storage capacity of nearly 200,000 cubic meters, more than 15 kilometers of pipeline networks, and supporting pumping stations. While such figures may seem routine elsewhere, on the Pamirs Plateau each component presents a formidable challenge.

Days and nights on the plateau are defined by extremes. During the day, intense sunlight beats down unobstructed, heating reflective safety vests until they are hot to the touch and turning gravel into scorching particles beneath workers’ feet. At night, temperatures plunge as strong winds carry fine sand and stones that rattle continuously against temporary structures. As one cook described, “Even if a window is left open by only the width of a hair, the tables will be covered with sand within half a day.”

More challenging than the wind and sand is the thin air. Winter pushes conditions to the extreme. Newly arrived engineers often struggle to walk even 200 meters while carrying survey equipment without stopping to catch their breath. Temperatures can fall below minus 30 degrees Celsius, snowmelt ceases, and the Tashkurgan River nearly dries up. Construction water must be transported from dozens of kilometers away, making every drop precious. On this land shaped by drought and severe cold, simply persevering is an achievement in itself.

In early April, the project officially began construction of its comprehensive administration building. From excavation and reinforcement installation to formwork assembly and concrete pouring, every step raced against the elements. Within less than a month, the structure rose from the barren landscape. A phrase often repeated among workers originated from the project manager: “If you can stand still and breathe comfortably, you’ve adapted to the plateau. If you can work, you’re already part of the iron army.” Through determination and perseverance, these builders from lower-altitude regions gradually adapted to the rhythm of the plateau.

Building on the Gobi Wilderness

If the environment is the first obstacle, construction itself is a contest against the laws of nature. The plateau’s dryness, dramatic temperature swings, and frequent sandstorms all directly affect engineering operations, particularly concrete construction.

Rapid moisture loss is the greatest challenge for concrete curing. In most regions, simple water spraying is sufficient, but in Taxkorgan water can evaporate within half an hour. Through repeated testing, engineers developed a layered curing method. During summer, geotextiles and moisture-retaining membranes are used with regular watering. In autumn, embedded temperature sensors monitor internal concrete conditions, allowing adaptive protection measures. During winter, heated enclosures and curing compounds are employed to ensure the concrete reaches its design strength.

Material transportation presents another challenge. Construction materials such as steel, cement, and pipes must be transported from distant regions. Access roads cross mountain passes where visibility can drop below ten meters during sandstorms. To address this, the project established a dedicated logistics coordination team to monitor weather forecasts and coordinate transport routes. Multi-layer windbreak and dust-control systems were also installed to protect stored materials from erosion and burial by blowing sand.

Basic living conditions also had to be built from scratch. When construction began, there was no reliable water supply, electricity, or accommodation. The project team coordinated with local authorities to install a three-kilometer temporary water pipeline and secure a dedicated 10-kilovolt power line. Fifty prefabricated housing units were assembled within twenty days, rapidly transforming the barren site into a functioning construction base. Today, the office area operates efficiently, living quarters are orderly, and workers can enjoy hot meals despite the harsh environment outside.

Excellence in Every Detail

Managing safety in Taxkorgan requires a different approach from that used in lowland regions. The project team follows two principles: make every worker a safety officer and prioritize incentives over penalties.

One of the most popular initiatives is the “Safety Store.” Stocked with daily necessities such as beverages, gloves, and snacks, the store allows workers to redeem items using safety points rather than money. Points are earned by identifying and reporting safety hazards, such as loose grounding wires, missing edge protection, or improperly secured scaffolding components.

This incentive-based approach transforms safety management from the responsibility of a few specialists into a shared commitment by the entire workforce. While workers look forward to redeeming rewards, the real achievement is the elimination of hidden risks across the construction site.

High-risk operations are managed with equal rigor. With winds frequently exceeding Force 6, activities such as work at height, lifting operations, and hot work must pass through a strict process of application, assessment, briefing, and approval before commencement.

The project site is equipped with wind-speed and dust-monitoring devices. Safety personnel continuously evaluate weather conditions before authorizing work. When conditions permit, additional cranes are deployed to maximize productivity. When winds approach safety limits, lifting operations are suspended immediately and crews shift to ground-based activities. This flexible approach protects workers while maximizing productive construction time. Combined with regular emergency drills and inspections, it provides comprehensive protection against the challenges of the Gobi environment.

The project team’s commitment extends beyond construction. In March this year, when a malfunction at the county water supply plant disrupted local water services, the project immediately dispatched excavators and an emergency repair team. Despite the bitter cold of the plateau in early spring, workers restored water supply in the shortest possible time. While the project may focus on wastewater treatment, its mission of serving local communities remains unchanged.

Looking across the site, the snow-covered summit of Muztagh Ata rises above the clouds while a modern wastewater treatment plant takes shape below. In the near future, domestic and industrial wastewater from Taxkorgan will be treated and transformed into reclaimed water, supplying surrounding green spaces through an integrated pipeline system. During periods when the Tashkurgan River runs low, this resource will help sustain the region’s fragile environment. As greenery gradually spreads across the Gobi landscape and living conditions continue to improve, the plateau’s snow mountains, lakes, ancient trade routes, and restored ecosystems will together create a vibrant ecological foundation for the county’s future development and tourism.