Deafblind people communicate in many different ways determined by the nature of their condition, the age of onset, and what resources are available to them. For example, someone who grew up deaf and experienced vision loss later in life is likely to use a sign language (in a visually modified or tactile form).
To burn someone's bridges is too forget about them. Ryan built bridges, meaning he still might want to come back to her. He is telling her to burn them, because he can't seem to do it himself. It isn't easy for him to forget her, and hes asking for her help.
The abandoned span, located across Trinity River and in close proximity to a cemetery, is said to be one of the most haunted sites in the area. The Pratt through-truss bridge, which measures approximately 100 feet, was said to have been burned and damaged by vandals, according to Bridgehunter.com.