4 Tex. Admin. Code § 41.21
Quarantined areas are as follows for Hidalgo County. Beginning at a point where the MP Railroad right-of-way intersects the Starr-Hidalgo County line and following the north side of the MP Railroad right-of-way in an easterly direction to where it intersects Old Military Road approximately three-fourths of a mile; thence, following Old Military Road in an easterly direction to where it intersects the IBWC Levee, approximately eight miles; thence, following the IBWC Levee in a southeasterly direction to where it intersects the Old Military Road, approximately 8.5 miles; thence, following the Old Military Road in an easterly direction to where it joins FM Road Number 1016 at Madero, approximately 1 3/4 miles; thence, following FM Road Number 1016 in a southeasterly direction to where it joins the Old Military Road, approximately one mile; thence, following the Old Military Road in a southeasterly direction to the North Granjeno Road, approximately 1 3/4 mile; thence, following the North Granjeno Road in an easterly direction to where it intersects Shary Road, approximately 5/8 mile; thence, south on Shary Road to where it intersects the IBWC Levee, approximately 50 yards; thence, following the meanderings of the IBWC in an easterly direction to where it intersects FM Road 1926, approximately three miles; thence, following FM 1926 in a southerly direction to where it intersects U.S. Highway 281 Spur, approximately 27 miles; thence, following U.S. Highway 281 Spur in an easterly direction to where it becomes U.S. Highway 281, approximately 4.2 miles; thence, following U.S. Highway 281, in an easterly direction to where it intersects the Hidalgo-Cameron County line, approximately 22 miles.
4 Tex. Admin. Code § 41.21