Dear Ms. Temkin,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located Reports of Site Locations, 1837 - 1950 in the Records of the Post Office Department, 1773 - 1971 (Record Group 28) that includes the file Colorado: Summit - Yuma with information about Weld County post offices. These records have been digitized and may be viewed online using the Catalog. Documents pertaining to the Hereford Post Office begin with image 745, but they do not identify the type of business located there in 1920.
We also located the Population Schedules for the 1920 Census in the Records of the Bureau of the Census (Record Group 29) that indicates E Wayne Hiatt lived in Hereford, Weld County, Colorado. His occupation is listed as Postmaster, but his industry listed is difficult to read. We are attaching a copy of this section of the census schedule to the end of our reply. In the Population Schedules for the 1910 Census, Hiatt is listed as a farmer in the general farm industry. In the Population Schedules for the 1930 Census, Hiatt was living in Glendale, California and is listed as a carpenter in the building construction industry. For more information about the Post Office Department and Census Records, please contact National Archives at Washington, DC - Textual Reference (RDT1) at Archives1reference@nara.gov.
We located his 1918 draft card in Draft Registration Cards, 1917 - 1918 in the Records of the Selective Service System (World War I) (Record Group 163). The card lists his occupation as a farmer. For more information about the draft registration records, please email National Archives at Atlanta (RE-AT) at firstname.lastname@example.org.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RDT1 and RE-AT. We apologize for this inconvenience and appreciate your understanding and patience.
Federal Census records and World War I Draft Registration Cards may be searched on Ancestry.com. In response to the COVID-19 pandemic, the National Archives has partnered with Ancestry to make the vast majority of their NARA-digitized holdings freely available to the public. Anyone with Internet access may create an account, access NARA records, and use other Ancestry resources, such as their educational offerings and family tree-maker application. For more information see Ancestry’s announcement -- “Free At-Home Education Resources From Ancestry® and Access to Nearly 500M National Archives Records”.
Using Ancestry, we also determined that his full name is Elijah Wayne Hiatt, that he was born 3 Jul 1884 in Lee Twp, Madison Co, Iowa, USA. He died 21 Nov 1963 in Truro, Madison Co, Iowa, USA. His grave is listed on Find-A-Grave. Ancestry also has additional biographical details about him, some of which have been consolidated in user generated family trees.
For information about Hiatt’s business while he was the postmaster, we suggest contacting local and state history sources such as the Weld County Court, the High Plains Library District, the Colorado State Library, and the Colorado State Archives, and local or state historical and genealogical societies.
We hope this information is helpful. Best of luck with your research!