Final answer:
Paving a dirt street in the floodway may require an engineer's "no-rise" certification.
Step-by-step explanation:
Yes, paving a dirt street in the floodway may require an engineer's "no-rise" certification. The purpose of the certification is to ensure that the paving of the street does not contribute to a rise in floodwater levels.
An engineer would assess the impact of the pavement on the water flow and provide a certification if it meets the requirements.