Because this lake eased the winter dry season, Kuanmiao became one of the places in Taiwan which did spring planting the earliest, an event which became one of the eight wonders of that era in Taiwan.
根據「台灣縣志」水利卷的記載，由於有弼衣潭紓解冬季旱象，關廟成為台灣春耕最早的地方，而「關廟春耨」也被列為當時台灣八景之一。