Write a eureka moment for William Chapman when he solved the 1787 building problem.
In the late 18th century, builders did their best to always intersect aqueducts and roads at right angles. It would simplify the building process and ensure structural stability. However, the Store Street Aquaduct had to be built on a 45-degree skew. The builders pleaded with the city planners. They needed a workaround to avoid the skew, but the bureaucrats wouldn't say yes.

William Jessop had been an engineer for Benjamin Outram, the lead architect for the project. Jessop suddenly remembered that his old boss, William Chapman, had already laid the roadwork they needed to travel on. Back in 1787, Chapman had a problem to deal with when he was building bridges for the Kildare Canal. When looking at the blueprints on a grid, Chapman suddenly realized he could use create a falsework parallel to the arches that would sustain the structure even with the odd skew. His work turned out successful, but Jessop and Outram had to perfect his plan if they wanted to successfully build the Store Street Aquaduct. Using the timber falsework method, the two builders marked out the position of the courses at the crown and the courses across the remainder of the arch. With that, thanks to Chapman's keen insight and Jessop's quick thinking, Outram completed the Store Street Aquaduct which still exists today.