聚落早期天然井，後在東海部隊協助下改造為現代化水井，同時立下題字「閩海多名山、東沙一神泉」之石柱。自來水普及之前，此水井供給聚落民生用水，春夏井水豐沛時，孩子與男人在此盥洗，婦女於此處洗衣，冬季水源不足時，各家戶則輪流分段取水。鮮少居民將此井水做為飲用水，推斷是擔憂鄰近有養豬戶，排泄物可能污染水質。

A modernized natural well owing to the re-engineering of the East Sea Force along with the inscription ‘Minhai Mountains’ and ‘Dongsha Well’ for commemoration. Before tap water service became widely available, this well was the domestic water supply source for the settlement. During the high-flow spring and summer seasons, children and men would wash themselves and women would wash clothes at the well. During the low-flow winter season, households access the well in turns.
Due to concerns about pig farming in the vicinity and the potential fecal contamination, dwellers rarely drink the well water.

一九七〇年代初，曾有六、七戶民宅共同出資購入黑白電視與發電機，置放在水井右方民居窗台邊，入夜後，大浦居民時常搬著板凳聚首於此觀看電視，甚至多次發生為了搶看電視，推擠中不小心跌入排水溝之趣聞。

In the early 1970s, six or seven households pooled their money to buy a monochrome television set and a generator, placing them by the window shelf of the house to the right of the well. Residents of Dapu regularly brought their stools and gathered to watch television in the evening. Over and over again, accidents of people falling into an open street gutter happened amid the crowd’s push toward the television.