Complex sentence: West of the village at Keldgate a reservoir was constructed in 1909 with a capacity of about; representing a day's usage--the reservoir was expanded in the 1930s, with the construction of a second "No.2 reservoir" with a capacity of about.
Split into simpler sentences: West of the village at Keldgate a reservoir was constructed in 1909 with a capacity of about; representing a day's usage. The reservoir was expanded in the 1930s, with the construction of a second "No.2 reservoir" with a capacity of about.