Conservancy Association
Long Valley became notable in Hong Kong when the Kowloon–Canton Railway proposed building the Lok Ma Chau Spur Line across it. This proposal aroused great concern from the Conservancy Association, and other Hong Kong environmental groups that the construction would greatly affect the habitats of the wetland, including waterfowl and water levels. The Conservancy Association launched the "Save Long Valley" campaign and wrote many letters to various Hong Kong government officials urging them to scrap the proposed spur line. Several methods thereafter proposed included a flyover or a tunnel under the wetland. The KCR initially adopted a hostile, non-conciliatory attitude towards environmentalist demands and eventually changed course after failing to get a permit from the Environmental Protection Department. It was finally decided to tunnel under the wetland at great cost.