
Our Staff
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Travis Entenman
Executive Director
Nature has been central to my life. My first five years were spent playing on 16 acres in a northern Idaho forest - picking wild raspberries, getting water from a small stream on the edge of our property, and watching bats circle the single yard light. This was the time for a wild young imagination to roam free. At six, I moved to the heart of the northern plains in South Dakota and discovered new aspects of nature. Instead of thick forests and mountain streams, there were rolling grasslands and roaming cows. My environment changed, but my need to be part of it did not.
Growing up in these environments has left me with a deep desire to sustain them. The idea of future generations not having these experiences imparts a sense of responsibility to leave the land as I found it and minimize the impacts of human activities. This drives my want to conserve our native prairies and clean our watersheds while educating the community on the importance of leaving the earth better than we found it, not letting the status quo continue just because, and what is possible when we give a damn.
We only have one earth and we are its stewards. As Aldo Leopold said, “Conservation is a state of harmony between men and land.”
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Emily Oyos
Education and Outreach Manager
The outdoors has always been an integral part of my life. Growing up just outside of Sioux Falls on 10 acres of land provided my imaginative young mind with endless opportunities for adventure. From hunting for antler sheds among the shelterbelt of trees my grandfather planted fifty years before to watching, mesmerized, as fireflies emerged from the alfalfa field at dusk, their blinking lights a sure sign of summer, nature spurred my curiosities about the world. I was hooked on the prairies and rivers of my surroundings and had a strong desire to protect them. Robin Wall Kimmerer explained this feeling best in her seminal work Braiding Sweetgrass, “Knowing that you love the earth changes you, activates you to defend and protect and celebrate. But when you feel that the earth loves you in return, that feeling transforms the relationship from a one-way street into a sacred bond.”
For anyone growing up close to the Big Sioux River, you’re told one thing, “Don’t go in the river. It’s really dirty.” During my time at Augustana University, I experienced this first-hand as I tested water samples from the river for pollutants. Sure enough, the river was highly polluted and not safe for recreational use, let alone drinking water. But what if we could change that? Through Friends of the Big Sioux River, I look forward to working with and educating our community members and lawmakers on water quality and conservation practices to improve our river for all species, both now and for future generations. Together, we can defend, protect, and celebrate this place we call home.
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Rashel Sanjeev
Stewardship and Events Intern
I didn’t grow up near the Big Sioux River. In fact, I grew up on the other side of the world, moving through countries, cultures and coastlines. My relationship with water wasn’t shaped by canoe trips or childhood summers on a riverbank. It was shaped by monsoons, overflowing gutters, and the constant reminder that clean water isn’t guaranteed, not everywhere, not for everyone.
That’s the lens I carry with me as a biochemistry student at Augustana University and a stewardship intern at Friends of the Big Sioux River. I came here to study science, but I’ve stayed because I found something more meaningful: a way to combine research, education, and advocacy to help people care for the places they live in, especially the places they often overlook.
Most of my days include collecting water samples, tracking data, and making sure the science we rely on is accurate and accessible. But this work also shows up in smaller, more human ways. Like watching middle schoolers light up during a water testing demo. Or creating social media posts that don’t just inform people but invite them in. Or just walking alongside the river and seeing how many people still don’t know how much it needs our help.
I care about this work because I’ve seen what happens when water is neglected, and I’ve seen what’s possible when people start paying attention. I didn’t grow up here, but I’ve grown into someone who deeply values what this river means for Sioux Falls. And I’ve learned that stewardship isn’t just about where you’re from. It’s about who you show up for.
So I’m showing up — for the water, for the people, and for the future that depends on both.