He was the only non-Hispanic member of the Monterrey, Mexico Diocese and was probably assigned his duties because he spoke English.

The San Antonio and Aransas Pass Railroad tracks, laid in the early 1900s alongside what later was designated FM 154, once carried a high volume of passenger traffic to and from Muldoon on a regular basis.

Additionally, the advent of diesel power obviated the need for locomotives to refill their water tanks, which further reduced the number of trains stopping in Muldoon.

In the 1960s, Hurricane Carla severely damaged the old water tower that had served the steam locomotives, and this structure subsequently was removed.

Muldoon once had a thriving business community, including several stores, at least one saloon, a blacksmith shop, a small hotel, and a rock quarry that produced the stone used in the construction of the Galveston jetties.