Highway Designation File

Transportation Planning and Programming Division
Current Description-Effective Date-Authority


Certified Mileage (Open to Traffic)
10.151 2010

FARM TO MARKET ROAD NO. 550

Minute Order 021215, dated 07/09/1945 (date of agreement)

From Rockwall to Heath and thence to SH 205 (Rockwall County). New Designation.



Minute Order 027188, dated 07/15/1949, Adm. Cir., 001-1951

From US 67 approximately 2.0 miles south of Rockwall southward to Heath, thence eastward to SH 205 near McLendons,  a distance of approximately 9.8 miles. (Rockwall County)  Revised to show a decrease in length of approximately 2.0 miles.



Adm. Auth., dated 11/04/1955

From FM 740 near Heath eastward and northeastward, to FM 1143 at Blackland, a distance of approximately 10.2 miles. (Rockwall County)  Section from US 67 south of Rockwall southward to FM 740 near Heath transferred to FM 740, a decrease of approximately 4.1 miles.



Minute Order 062963, 11/26/1969; Adm. Cir. 023-1974, dated 03/15/1974

From FM 740 in Heath, eastward and northeastward approx. 10.2 miles to SH 276 at Blackland. (Rockwall County)  Redescribed due to FM 1143 being redesignated SH 276.