I am starting with Walter's parents, John J. & Lauretta Dooley. There are 2 more Dooley's in the directory who may, or may not, be related to Walter's family.

1909 ANACONDA CITY DIRECTORY:

DOOLEY, John J.; foreman, Slime Ponds, Reduction Works; resides at 613 Elm Street (note that the "slime" ponds are the settling ponds used by the ACM Company east of Anaconda--these ponds are now part of the Butte-Anaconda Superfund clean-up site).
DOOLEY, J.W., porter, Schils & Co., resides corner of Cedar and Commercial Avenue.
DOOLEY, Patrick J.; proprietor; Mint Family Liquor Store, 311 E. Park Ave., boards at the Montana Hotel.
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1920 U.S. Federal Census; Montana; Anaconda; Precinct #: 3; Roll: T625_969; Page: 8A; Enumeration District: 25; Image: 0760; Enumerated on January 10, 1920; Lines: 31-35:

Residing at: 313 Locust Street

DOOLEY, John J.; head of household; male; white; 47 years of age; married; born in Ireland (English); both parents born in Ireland (English); immigrated to U.S. in 1889; became naturalized citizen in 1896; occupation: slum pond foreman.
DOOLEY, Lauretta; wife; female; white; 43 years of age; married; born in Illinois; father born in Illinois; mother born in New York; occupation: none listed.
DOOLEY, Elizabeth; daughter; female; white; 20 years of age; single; born in Montana; father born in Ireland (English); mother born in Illinois; occupation: none listed.
DOOLEY, Walter; son; male; white; 14 years of age; single; born in Montana (rest as above).
DOOLEY, John; son; male; white; 7 years of age; single; born in Montana (rest as above).
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1930 U.S. Federal Census; Montana; Deer Lodge County; Anaconda; 1st Ward; Roll #: T626_1255; Enumeration District: 13; Image: 107.0; Enumerated on April 4, 1930; Lines: 78-82:

Residing at: 501 W. 5th Street

DOOLEY, John J.; head of household; rents at $25/month; male; white; 58 years of age; married; first married at 22 years of age; born in Irish Free State; both parents born in Irish Free State; occupation: laborer--reduction works.
DOOLEY, Loretta; wife; female; white; 53 years of age; married; first married at 19 years of age; born in Illinois; father born in New York; mother born in Illinois; occupation: none listed.
DOOLEY, Elizabeth; daughter; female; white; 28 years of age; single; born in Montana; occupation: agent--ladies garments.
DOOLEY, Walter J.; son; male; white; 23 years of age; single; born in Montana; occupation: sampler--reduction works.
DOOLEY, John; son; male; white; 17 years of age; single; born in Montana; occupation: none listed.
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MONTANA DEATH INDEX 1907-1953:

DOOLEY, John J.
Died: 01 Aug 1937 at 64 years of age
Index #: Ana 2859
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1947 ANACONDA CITY DIRECTORY:

DOOLEY, Elizabeth M.; clerk; resides at 314 W. 8th Street
DOOLEY, John A. (Mary B.); teacher--Sr. High School; householder at 314 W. 8th Street
DOOLEY, Lorretta M. (widow John J.); resides at 314 W. 8th Street
DOOLEY, Walter J. (Ann C.); sampler--ACM Company; householder at 720 E. 4th Street (this address is very near the corner of 4th & Ash Streets. St. Peter's Church is located at the west end of this 4th street block at the corner of 4th & Alder Streets).
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MONTANA DEATH INDEX 1954-2002 & SOCIAL SECURITY DEATH INDEX:

DOOLEY, Walter J.
Born: 24 Oct 1905
Died: 15 Oct 1984 at 78 years of age
County(s) of Death & Residence: Deer Lodge County
Marital Status: Widowed
Certificate #: 5054
SS#: 516-01-9047 (Issued in Montana before 1951)

DOOLEY, Ronald W.
Died: 25 May 1997 at 61 years of age
County(s) of Death & Residence: Lewis & Clark County
Father: DOOLEY, Walter John
Mother: ANTONICH, Ann Katherine
Marital Status: Married
Certificate #: 2890
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I was unable to find a death record for Lauretta/Loretta/Lorretta Dooley. I hope you have found the above information useful. I am not related to, nor do I have any personal knowledge of, the Dooley family.