The road this bridge belongs to starts at a market town called Skuon, 75 kilometres north of Phnom Penh, where vendors sell fried tarantulas by the bagful to travellers who stop at the junction. Foreigners call it Spiderville. From there National Road 7 runs northeast for hundreds of kilometres, crosses into Laos, and keeps going until it reaches Luang Prabang. On paper it is a leg of Asian Highway 11, one of the continent-spanning routes drawn up to knit Southeast Asia into a single road network. For years it had a gap. The Sekong River, arriving at Stung Treng from the mountains of southern Laos, cut the corridor clean through, and a highway that stopped at a riverbank was not much of a highway at all.
Cambodia's Chinese-funded bridges are numbered, and this one carries the first number. The formal project title reads: 1st Cambodia-China Friendship (Sekong) Bridge. Everything that followed - including the far longer Mekong crossing that opened at the same town in 2015 as number six - descends from this piece of work. The financing came as an interest-free loan through China's Ministry of Commerce, and the contract went to Shanghai Construction Group, the same firm that would return to Stung Treng years later for the Mekong span. Reported figures for what it cost vary depending on whether you count the bridge alone or the highway rebuild it arrived with: the combined project has been put at around 15 million US dollars, while aid-tracking databases record a commitment for the bridge itself of roughly a third of that.
The Sekong deserves more attention than the bridge that spans it. It rises near Hue in Vietnam, runs some 480 kilometres southwest through the provinces of southern Laos, forms part of the Lao-Cambodian border along the way, and finally delivers into the Tonle San only about five miles above the point where that river meets the Mekong. Hydrologists group it with the Sesan and the Srepok as the 3S rivers - the three tributaries that together supply a substantial share of the lower Mekong's flow and carry much of its migratory fish. At the crossing point the water is wide but not Mekong-wide, and the finished bridge came in at 1,056.84 metres, a shade over a kilometre. That is still a serious span by any measure, and it has to stand in a river that rises and falls by several metres between the dry months and the height of the monsoon.
Ground was broken on 18 November 2004, at the start of a dry season, with the bridge and the highway treated as one undertaking. Building through this landscape means working around a monsoon that reliably erases half the year's progress window, and the project took three and a half years. On 29 April 2008 the Sekong Bridge and the rebuilt National Road 7 were inaugurated together in a formal ceremony - the road and the crossing opening as a single continuous thing, which is exactly what they were meant to be. Nobody rides a bridge for its own sake. They ride it because of where the road on the other side goes.
What the bridge really did was change Stung Treng's grammar. Before, the town was an endpoint - the place where a road from the south ran out. Afterwards, it was a junction, sitting on a through-route between the Cambodian lowlands and the Lao interior, with freight and buses passing rather than terminating. Border trade with Laos, already handled by the town's river port, moved onto wheels. Travellers heading north toward Si Phan Don and Pakse began crossing here as a matter of routine rather than adventure. The province had spent centuries being shaped by its rivers, changing hands between the Khmer Empire, Lan Xang and Champasak along the water. A kilometre of concrete over the Sekong quietly ended that arrangement.
The Sekong Bridge stands at roughly 13.538 degrees north, 105.990 degrees east, a few kilometres east of Stung Treng town in northeastern Cambodia. At 1,057 metres it is the shorter and more easterly of the town's two major crossings; use it and the 1,731-metre Stung Treng Bridge on the Mekong as a matched pair to fix your position, with the Sekong-Sesan-Mekong confluence complex between them. National Road 7 runs away from the bridge to the north toward the Lao border, roughly 50 kilometres distant, and southwest toward Kratie. Stung Treng Airport (VDST) is immediately adjacent but has no scheduled flights. Good viewing between 2,000 and 6,000 feet. December through February offers the clearest air; expect afternoon build-ups and reduced visibility from May to October, and haze from agricultural burning in March and April.