Final answer:
Controlled flow roof drainage requirements vary depending on local building codes and standards. The question lacks specifics, making it impossible to provide a precise figure for a minimum drainage requirement on a 10,000 square foot or smaller roof.
Step-by-step explanation:
The question you've asked pertains to the minimum requirements for controlled flow roof drainage on roofs that are 10,000 square feet or smaller.
While the question doesn't specify an exact number for the minimum requirement, general engineering practices related to such installations often involve calculations based on factors such as the roof pitch, the local rainfall intensity, and the capacity of drainage systems.
Drainage considerations are critical as they ensure that the roof can effectively manage water without causing damage or risk to the structure. It is important to consult local building codes or standards as they can significantly vary. However, without a given standard, it is not possible to provide a precise figure for a minimum requirement.