The rating on Plano, Texas' bonds reflects the service area's historical growth and economic diversity, a stable revenue stream, low drainage rates, and strong historical coverage of annual debt service requirements. Currently, the rating is limited by quickly increasing debt. Plano ('AA' GO debt) is a suburb of Dallas, with an estimated population of 202,020. The city continues to experience strong population growth. Similarly, assessed valuations have demonstrated strong growth. The drainage utility was established in 1992 in response to EPA storm water drainage rules. Fees are based on impervious surface area. Most residential customers pay a low $2 flat monthly charge that is billed with water and sewer charges. Rates were last increased in 1994 and are not expected