House Bill 1657 amends Water Code provisions to authorize the Texas Water Development Board (TWDB) to participate in federal grant programs for state, as well as local, governments for water treatment works, expands the authorized scope of TWDB participation to include water supply projects and flood control measures, as well as treatment works, and includes in that participation federal loans and other assistance as well as grants. The bill removes provisions relating to the construction grant program that required water treatment construction grant applicants to pay the TWDB a grant processing fee.