106 West Main Street
P.O. Box 146
Phone: 906-475-4631
Fax: 906-475-5561


Thursday, April 13th, 1950 - Sunday, August 23rd, 2020
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Diane Lynn Cassidy, 70, of Carriage Lane, Harvey, passed away peacefully early Sunday morning, August 23, 2020 at the Trillium House in Marquette in the care of her loving family and UP Home Health and Hospice.

Diane was born April 13, 1950 at St. Luke’s Hospital in Marquette to Gordon ‘Corky’ and Elizabeth (Savolainen) Kevern and graduated from Negaunee High School, Class of 1968. She earned her LPN degree from the NMU School of Practical Nursing in 1969 and then lived in Alpena, MI for two years before moving to her home built in Harvey. Diane had two sons with her previous husband, Bill Tresedder. She married Dennis Cassidy in 1982.

A compassionate caregiver to all, Diane worked at Morgan Heights, Marquette General Hospital, for Dr. Mudge and Dr. Tabor throughout her employment career. She loved to cook, bake, enjoyed photography, loved to travel and spent many winters in Lake Havasu City, AZ after she and her husband Dennis retired. Diane loved the holidays and made every one special, especially for her grandchildren. A die-hard Elvis fan, she made a trip to Graceland, and Elvis will be singing ‘Amazing Grace’ at her service. She loved music and listened to it all day. Along with the music she loved to dance. She and her husband loved road trips and exploring, always with the camera in hand. Diane believed in ‘stopping to smell the roses’ and then photographing them. Many photo books and a few cook books compiled over the years. She enjoyed going to camp where she always felt the essence of her Dad. Most of all, Diane loved time spent with her family and friends. Her boys were the sunshine of her life and her girls were the rainbows. Her physical pain never clouded the deep affection for her family. Times weren’t always easy, but their love gave her more than she could ever ask for.

Surviving are her husband, Dennis Cassidy; sons: Bradley (Gina) Tresedder of Wausau, WI and Donald (Jackie Retaski) Tresedder of Gwinn; step-son, Sean (Meghan) Cassidy of White Lake, MI; grandchildren: Tarryn (Maxwell) Holm of California and Sydney Cassidy of White Lake; her sister, Kathy (Ernie) Grasso of Negaunee; nephew, Dean (Karena) Grasso; niece, Dana (Jason) Rivord; great-nephews, Joe Grasso and Kole and Alex Rivord; and great-niece, Mandi (Kenny) Kinnunen. She was preceded in death by her parents.

Memorial services will be held at 1:00 pm on Friday, August 28th at Immanuel Lutheran Church with Rev. Steven Solberg officiating. Visitation will take place from 11:00 am until the time of services at 1:00 pm at the church on Friday. Masks are required inside the church. Interment will take place in the Negaunee Cemetery. In lieu of flowers, memorial contributions may be directed in her memory to UPAWS.

Diane’s memorial page may be viewed at koskeyfuneralhome.com.
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Service Details

  • Visitation

    Friday, August 28th, 2020 | 11:00am - 1:00pm
    Friday, August 28th, 2020 11:00am - 1:00pm
    Immanuel Lutheran Church
    520 Hwy US 41 East
    Negaunee, MI 49866
    Get Directions: View Map | Text | Email
  • Service

    Friday, August 28th, 2020 | 1:00pm
    Friday, August 28th, 2020 1:00pm
    Immanuel Lutheran Church
    Address Not Available
    Masks required inside church.
    Rev. Steven Solberg
  • Interment

    Negaunee Cemetery
    Address Not Available


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Private Condolence
Pam and Phil (Barber) & Joan and John (Sunne) sent flowers to the family of DIANE LYNN CASSIDY (Kevern).
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Lolita R.Barry

Posted at 11:42pm
I wish to extend my deepest sympathy and prayers to Brad, Donny, and Diane's family. It has been several years since I have had contact with you. She will be missed. Lolita Barry

Laurel fetterhoff

Posted at 05:00pm
Diane you will be so missed. You were so sweet and funny and a great baker too! Dennis I am so sorry for your loss, you took the best care of her, I know it meant to world to her......

Silva Jarvinen

Posted at 02:45am
A beautiful soul who left way too soon. Our condolences to the family from Silva and family from Potsdam, Germany and Sirkka and Eikka from Kangasniemi, Finland.

Heartfelt Sympathies Store

Posted at 11:14am
In loving memory... From Darwin and Sue Britton, Darryl and Nicole Britton and family, Kris and Jodi Brugman and family.
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Pam and Phil (Barber) & Joan and John (Sunne)

Posted at 10:41am
To our cherished friend Diane. We love you and will miss you. May you Rest In Peace with the angels.
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Pam and Phil (Barber) & Joan and John (Sunne) purchased flowers for the family of DIANE CASSIDY. Send Flowers


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