The phrase 'is located about' is correct and usable in written English. You can use it to describe the position of something in relation to something else. For example: "The nearest supermarket is located about three miles away from my house."
The location is located about 25 miles east of Lafayette.
It is located about 20 miles east of Sacramento.
The crux is located about eighteen hundred feet above the ground.
This magma layer extends at least 150 square miles and is located about five miles underground.
The present-day Charente is located about 50 km northward of the well-known Gironde estuary.
It is located about 50 miles west of Denver and is easily accessible via major highways.
It is located about 22 miles (35 km) southwest of the Mahanadi River.
It is located about 350 miles (560 km) east of the New Caledonian mainland.
It is located about 15 miles (24 km) east of Maseru, capital of Lesotho.
It is located about 100 miles (160 km) northwest of Surabaya.
It faces the Inland Sea and is located about 15 miles (24 km) west of Tokuyama.
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