Highway Designation File

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


Certified Mileage (Open to Traffic)
25.568 2010

FARM TO MARKET ROAD NO. 518

Minute Order 021215, dated 06/21/1945 (Date of Agreement)

From US 59 in the south side of Houston, southward to the Brazoria County Line.  New Designation.



Minute Order 021215, dated 07/09/1945 (Date of Agreement)

From US 59 in the south side of Houston, southward and eastward to Pearland (State 35); thence to League City and Kemah (State 146).  (Galveston, Brazoria, and Harris Counties)  Extended from Brazoria County Line to Pearland, League City, and Kemah.



Minute Order 021668, dated 01/18/1946

From junction US 75 at League City to Kemah, and from Galveston County Line via Pearland to junction US 59 near Houston.  (Galveston, Brazoria, and Harris Counties)  Cancel that portion from US 75 westward to Brazoria County Line.



Minute Order 026214, dated 01/27/1949

From US 59 on the south side of Houston, southward and eastward to Pearland, thence via League City to Kemah.  (Galveston, Brazoria, and Harris Counties)  Section from League City to Brazoria County Line added (9.5 miles).



Minute Order 060375, dated 01/16/1968; Adm. Auth., dated 04/01/1968; Adm. Cir. 035-1968, dated 04/01/1968

From US 90A (formerly US 59) in Houston, southward and eastward to Pearland; thence via League City to SH 146, a distance of approximately 33.2 miles.  (Harris, Brazoria, and Galveston Counties)  New description; eastern terminus relocated and 1.3-mile section of FM 1266 transferred to this FM, a net decrease of approx. 0.5 mile.



Adm. Auth., dated 09/13/1984; Adm. Ltr. 010-1984, dated 10/15/1984

From SH 288, approximately 4.9 miles west of Pearland, eastward and southeastward via Friendswood, League City, and Kemah to SH 146, a total distance of approximately 24.0 miles.  (Brazoria and Galveston Counties) New description; approx. 8.3 miles of FM 518, from US 90A southward to junction of FM 518, redesignated as FM 865, as requested by District.



Minute Order 105686, dated 06/27/1995; DesLtr 03-1995, dated 06/30/1995
Minute Order 115371, dated 11/15/2018 (Rescinds Minute Order 105686)

Minute Order 105686: Cancelled.  (Brazoria and Galveston Counties)  Mileage transferred to UR 518. ["Transferred" mileage was described on the Highway Designation File page for UR 518 as "From SH 288 eastward to SH 146, a distance of approx. 25.568 miles."]

Minute Order 115371 general description: Minute Order 115371 rescinds Minute Order 105686. The result of this rescission is the elimination of the Urban Road (UR) system. The Farm to Market (FM) and Ranch to Market (RM) roadways which were intended to be redesignated as Urban Roads under the provisions of Minute Order 105686 revert back to their FM/RM designations. Minute Order 115371 declares that the provisions of Minute Order 105686 were never implemented, and although the UR designations were in effect during the interim between these two Minute Orders, the affected roadways continued to be referred to by their FM or RM designations. Only the Highway Designation Files made reference to the UR designations during this interim period. Upon the passing of Minute Order 115371, the affected Highway Designation Files have been updated retroactively to reflect the FM/RM designations.

Minute Order 115371 as it affects FM 518: Any mileage that was previously described as "transferred to UR 518" reverts back to FM 518. This is retroactive to the date of passage of Minute Order 105686. The Highway Designation File page for UR 518 has been removed.