Ключевые слова: construction, construction site, construction workers, culverts, dig, digs trench, dirt, drainage, drainage pipe, drainage system, earth, excavation, ground, hole, industry, infrastructure, inserts polypropylene pipe, installation, installing underground, laying, laying drainage, pipe, pipe trench, pipeline, pipes, plastic, plumbing, polypropylene pipe, reinforced construction, repair, sewage, sewer, sewer pipe, sewer pipes, sewer wells, sewerage, storm, trench, underground, underground trenches, utility infrastructure, water drainage, water main, work, worker,