 On April 18, 1963, I-820 was designated to use existing Loop 217 from SH 121 & SH 183 to Hulen Street, while the section of Loop 217 from Hulen Street to US 377 was designated as Loop 820.On September 1, 1965, another section of Loop 820 from I-20 north and east to I-35W was designated.This section of Loop 820 from I-20 north and east to I-35W became part of I-820 on January 21, 1969, making I-820 a full loop.