Entity's coords

Code:

BaseEntity[] entities = UnityEngine.Object.FindObjectsOfType<BaseEntity>();
foreach (BaseEntity entity in entities)
{
    if (entity.name.Contains("someEntityName"))
    {
        Debug.Log(entity.transform.position);
        // something clever here
    }
}

Since you mentioned the mining quarry specifically, you could also try..

Code:

MiningQuarry[] quarries = UnityEngine.Object.FindObjectsOfType<MiningQuarry>();
foreach (MiningQuarry quarry in quarries)
{
    Debug.Log(quarry.transform.position);
    // something clever here
}