Harrison's major life's work consisted in overseeing the immense project known as the Sukkur (Lloyd) Barrage, as chief engineer, from 1923 until its completion in 1931.
The barrage enables water to flow through what was originally a network of canals 6,166 miles (9,923 km) long, with more than 5 million acres (20,000 km2) of irrigated land.
Another report states: "The 5,001 feet (1,524 m) long barrage is made of yellow stone and steel and can water nearly 10 million acres (40,000 km2) of farmland through its seven large canals.
It stated: "Immediately after the ceremony Lord Willingdon announced that a knighthood had been awarded to the British designer of the project: Charlton Scott Cholmeley Harrison.
India seethed with the news that Arnold Musto, native engineer in charge of construction who spent seven hot summers by the dam site, designed much special machinery, was not rewarded at all."
In The Unsung (1945), Maud Diver wrote of their joint achievement as follows: "In Mr Arnold Musto the Bombay PWD produced a man in every way fitted for so mighty a task.
Both men were deservedly knighted for their twofold achievement; and Harrison, in particular, was blest by his assistants for his care and thought in protecting them, as far as might be, from the terrible climate of Sukkur, where the mercury often touched 120 degrees for months on end.
Harrison had the wisdom and humanity to insist on proper housing of his engineers, the common comforts of electric fans and light before he would ask them to begin work; and they, in return, gave of their utmost without flagging ... and in record time they completed their seven canals.
Before that, in England, he had been called to give expert evidence to the Simon Commission, part of the process which eventually resulted in the Government of India Act 1935.
The result was the conversion of the Jamaica Banana Producers Association Limited (JBPA) into a joint stock company with shares issued to members to the value of the contributions they had made to the Co-operative.
The obituary article reporting Harrison's death in The Daily Gleaner,[2] also notes that after returning to Jamaica in December 1933, he was actively engaged in several other aspects of Jamaican life.
After World War II, in about 1947, at the request of his wife, Harrison moved to live in Streatley, Berkshire, England; and died in a nursing home at Goring-on-Thames, 3 July 1951, having suffered a stroke approximately six months previously.