Marker Numbers

As part of a statewide identification and reference system, the THC has assigned marker numbers (also called “Atlas numbers” because they are compiled in the
Texas Historic Sites Atlas
) to all historical markers.
State law (Chapter 442, Texas Government Code, Section 442.0065) requires that all advance and directional historical-marker guide signs that are newly installed or replaced on a maintenance basis include the relevant marker’s identifying number. This requirement affects D7-6, D7-7, D7-8, D7-7a R(L), and related signs (see “Advance Directional Signing Standards” later in this section).
Finding the Number.
 The best way to find the marker number for a sign being replaced on a maintenance replacement basis and which currently does not display a marker number is to use the THC’s on-line
Texas Historic Sites Atlas
. The Atlas can provide a list of historical markers by county. Each marker’s number is listed, along with other pertinent information such as text, site name, and address. To find a marker number, proceed as follows:
  2. Click on the “County” tab.
  3. Choose the county from the drop down box and uncheck everything except
    Historical Markers
    .
  4. Click the
    Submit
    button. The full record of historical markers for the county you selected appears in the right frame of the screen.
  5. Find the marker you’re looking for and click on
    Historical Marker
    . Information about the marker appears with the marker number listed at the very top.
  6. Verify the location by clicking on
    Map
    , if available.
    The web site lists
    all
     historical markers — off-system, on-system, and those within city limits.