MADISON, Wis. -- Another recent car accident brought tragedy but with the loss comes a story of sadness and also compassion to others.

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Filmmaker John Gage never got to see his finished product.

On the day he finished shooting for the documentary about this summer's flooding, he was killed in a rollover accident on Interstate 39/90 near Beloit.

This project turned into a mission to help others remember the summer of 2008, and help those in need.

"My father, John Gage, was very committed to helping the victims of the flood of 2008. Unfortunately, he died in a car accident just a week before finishing this documentary," said Emily Gage in the documentary The Flood of 2008.

It was project, with pictures John Gage felt obligated to share.

Gage and his father Howard ran Videogenics, a video production company in Janesville.

"He was up in Jefferson and he said he saw an awful lot of people concerned about this, but then he ran into some people who were actually being hurt by what was going on. He said, 'boy, we should really do something about this,' " said Howard Gage.

Gage turned his passion for video into a passion to help others.

Following the floodwaters, he documented victims' stories, combining his own footage with local news coverage from the Janesville Gazette and WISC-TV to create an hour-long film.

The documentary is contributing to the United Way's flood relief fund.

"The end result will be that a lot of people will get help by it. All the money raise is going right back into flood relief. There's no production cost on our part," said Howard Gage.

"It's very important to the citizens of our county to have this kind of documentary. So for us, it was just a natural fund to develop," said Gail Graham, president of the United Way of North Rock County.

Gage's father said John spent at least 300 hours on the documentary.

Only the final two minutes of the film remained when John passed.

The final piece was finished by a friend and John's daughter.

John leaves behind perhaps his greatest work, and will live on through his final project. It remains a vision to use his skills to improve the lives of others, WISC-TV reported.

The documentary will be for sale starting this weekend at Labor-Fest in Janesville.

Starting next week, it will be available in dozens of stores in Rock and Jefferson Counties

The DVD costs $10, and it all goes to help flood victims.