Capitol Complex Construction

If you are planning to visit the Railroad Commission’s Austin offices in the William B. Travis state office building, please be aware of changes to traffic patterns and the availability of metered parking in the area due to the Capitol Complex Construction project.  Click here for additional information.

Washout Factors and Top of Cement

Pursuant to Statewide Rule 13(a)(C) and 13(A)(D), when using a calculation to determine the top of cement, the Railroad Commission of Texas (RRC) uses a baseline washout factor of 20 percent across most of the state, and 30 percent in coastal counties due to higher probabilities of encountering unconsolidated sands in the coastal region. A map showing these factors by county may be found below.

The RRC will also consider lesser washout factors submitted by operators on a case-by-case basis, provided the operator requesting the lesser washout factor submits supporting documentation (see Instruction D on Form W-15). An operator may request approval to apply a lesser washout factor across an area such as a field or county, but each operator’s drilling technology and practices, and supporting washout documentation will be evaluated independently of other operators’ data. Operators requesting a lesser washout factor should submit the request and supporting documentation to the appropriate RRC District Office.

Please click image to enlarge:
Texas washout map

Last Updated: 12/7/2017 9:05:35 AM