You probably need to correct dates on Jessie - 1818-1891. Is he a son or brother?
It appears that Lora and John married in 1890 so the above dob doesn't match. familysearch.org census shows Lora a widow in 1900, so John died prior. Many miners in that CO area named John McDonald. One below is a possibility, but not much to go on.
United States, Marriages
Groom's Name: John A. Mc Donald
Bride's Name: Lora E. Smith
Marriage Date: 27 Apr 1890
Marriage Place: Saint Augustine Catholic,Antonito,Conejos,Colorado
Indexing Project (Batch) Number: M53978-2
System Origin: Colorado-ODM
Source Film Number: 2695
United States Census, 1900 ED 143 Waukesha city Ward 5-6, Waukesha,
Head Warren H Smith M 59 WI
Wife Amelia C Smith F 56 WI
Daughter Lora Mcdonald F 35 WI widowed
Gradau Jannet Mcdonald F 9 CO
Mo-in-law Caroline Haunt F 74 NY
LAKE COUNTY MINE FATALITIES
MCDONALD, JOHN Death Date: 1899 JAN 11
Yrs Mine Exp:
Age at death:
Mine name: LOUISVILLE
Cause of death/comments: EXPLOSION WARMING POWDER
Burial: No record in Lake Co.