A prolonged downturn in the construction industry is leading to a decrease in sand mining off the coast of Incheon, South Korea. Reduced demand for construction materials has directly impacted the volume of sand extracted from the sea. This decline is particularly concerning for Ongjin County, which relies heavily on revenue generated from these mining operations. The decreased income is causing financial instability for the county government. Authorities are monitoring the situation and assessing potential mitigation strategies. The situation highlights the vulnerability of regional economies to fluctuations in the national construction market. Further declines are anticipated if the construction sector does not recover.