According to the October 1916 issue of the Industrial Bulletin Mr. Rockefeller announced his willingness to aid in the building of churches in the company mining camps, which spurred plans to build the Union Protestant Church at Primero Mine. The new church came several years after Primero's first church, that had been shared between both the Catholic and Protestant denominations of the camp. Following the construction of the Protestant Church the Catholic

denomination was given exclusive rights to the original church at Primero. Contributions for the financial cost of the new Protestant Church were arranged by Father August Forster and the Catholic Church in consideration of not contributing to the financial cost of the original church. Many employees of the Colorado Fuel and Iron Company also

contributed to the cost of the new church, the bulletin notes that many of these were immigrants.

Several provisions were made in the management of the new United Protestant Church at Primero. The site for the church was long term leased at a nominal rent by the Colorado Fuel and Iron Company. The conditions of the contributions made by John D. Rockefeller were that neither he, or  the company would assume any control or responsibility over the management of the church. The management instead was made up of a council of members of the congregation. This council was in charge of electing a pastor and drafting a constitution. The Constitution was drafted with the help of David Latshaw a representative of the International Committee of the Y.M.C.A, who was visiting from New York. The Bulletin said of the new pastor prospects he "shall preferably be an ordained minister in good standing in a generally recognized evangelical church."

The members of the congregation employed Rev. W.J. Gregory upon completion of the protestant church the Industrial Bulletin noted in its January 1917 issue. Dr. Gregory, a Presbyterian minister, was previously on the faculty at Westminster College in Denver Colorado. Not only did Dr. Gregory pastor the Protestant Church he also served as the Educational Secretary for the Y.M.C.A at Primero and Segundo.

The dedication ceremony was discussed in the April, 1917 issue of the Industrial Bulletin. The event took place on March 25th, 1917 and was a notable event in both the industrial and religious communities of Southern Colorado. As the church at Primero was the first Protestant church to be completed in the series of proposed Protestant and Catholic churches to be built in the Colorado Fuel and Iron Company's mining camps, the dedication ceremony drew a crowd. The sermon was conducted by Rt. Rev. Irving P. Johnson who was bishop of the Episcopal diocese of Colorado. Among those assisting were Rev. Frank T. Bayley who was pastor of Plymouth Congregational church in Denver, Rev. M. H. Macleod who was state superintendent of the Presbyterian church and the Primero congregation's pastor Rev. W. J. Gregory. Individuals from Primero and nearby camps attended the ceremony as well as officers from the Colorado Fuel and Iron Company and A. Bruce Minear who was the executive secretary of the Y. M. C. A. The Reverends and officers from the Colorado Fuel and Iron Company were greeted at the train station by the Primero Italian brass band, which led to a procession to the church.

In the Industrial Bulletin news section the protestant church is mentioned for the organization of a "Young People's Society." 

About two-hundred people attended a Mothers Day program on May 8th at the Union Protestant Church according to the Industrial Bulletin.