2026-07-02T07:17:25-07:00 2025-12-31 472319412 Jensen Smith Certified Public Accountants Inc 661 5th St Ste 101 Lincoln CA 95648 990 2025-01-01 680429132 Sierra Streams Institute SIER 5304777132 117 New Mohawk Rd Ste H Nevada City CA 95959 Jeff Lauder Executive Dir. 2026-07-02 true Jennifer M Jensen CPA P00544955 9164341662 2025 2025-03-06 01:10:19Z Lang Waters 2170645 false X sierrastreamsinsitute.org X 1999 CA To promote community stewardship and advance scientific knowledge of watersheds through reserarch, monitoring and education for the benefit of the Sierra Nevada region and beyond. 10 10 22 0 1977995 2011674 114579 138004 333 16112 3215 2342 2096122 2168132 0 0 928940 996420 0 74291 893608 1269059 1822548 2265479 273574 -97347 889051 1336386 228834 764623 660217 571763 To promote community stewardship and advance scientific knowledge of watersheds through reserarch, monitoring and education for the benefit of the Sierra Nevada region and beyond. false false 1221018 Restoration: Watersheds throughout the Sierra Nevada have suffered impacts to their health, water quality and ecological function as a result of gold mining, residential development, road building, agriculture, diversions, and other activities. Our restoration programs are aimed at correcting these problems, with efforts that include the following: salmon habitat restoration, invasive non-native species removal, restoration of native vegetation, geomorphological restoration, forest health and prescribed fire, and integration of traditional native practices. Our work is focused in the Sierra Nevada, with the goal of increasing community member and multi-stakeholder participation in the restoration process. We have undertaken extensive restoration efforts in our home watershed of Deer Creek in the past, and now work with partners in the Bear River watershed on projects ranging from post-dam removal salmon passage and habitat restoration through endangered or protected plant species protection at current conservation easements throughout the Sierra. In general, our approaches involve what is known as "process based restoration", focusing on restoring the processes that let nature manage itself (such as flooding and fire) as opposed to trying to "restore" arbitrary conditions such as certain plants or aesthetics. 216442 Monitoring and Research: Sierra Streams Institute works with community members to monitor the health of multiple watersheds throughout the Northern Sierra Nevada mountains. These watersheds include Deer Creek, our home watershed, as well as the Bear River, Truckee River, American River, and portions of the Yuba River. This year we expanded into monitoring stream health across even more watersheds, including the Pit, McCloud, Feather, Mokelumne, and Stanislaus rivers. Collecting these data regularly over time allows us to see changes, evaluate restoration efforts, and locate sources of potential problems. Our quarterly baseline monitoring collects data on water temperature, dissolved oxygen, conductivity, pH, and turbidity; these vital signs tell us how the creek is doing and what kinds of life can inhabit its waters. We also check nutrient and bacteria levels, which are important for algae growth and safe swimming. Finally, we use benthic macroinvertebrates (BMI), stream-dwelling insect larvae, as bioindicators of stream health throughout all of the watersheds we monitor, connecting BMI communities to water quality and climate change impacts. Sierra Streams Institute's research programs include studies on fire ecology, climate change impacts, and water quality and biological responses in streams. Our laboratory services include nutrient analysis, bacteria analysis and benthic macroinvertebrate sampling and identification. We are the only non-profit water quality laboratory in the region with the capacity to do the suite of analyses we provide, serving as a community partner and resource. Our research activities have also included prior studies on mine waste impacts on human health, educational outcomes of non-traditional science training, and forest health. 103677 Science Education: The Sierra Streams Education Program offers a variety of science instruction options for the youth of Nevada County and beyond. Rooted in the Yuba and Bear watersheds of Nevada County, our program offers an unparalleled educational experience where students of all ages learn core watershed science principles while exploring the rugged beauty of our landscape and waterways. Our programming is also focused on generating easy-to-use resources for community educators, including curriculum, tools and lesson plans, and databases of public environmental education learning sites. 1541137 true true false false false false false false false false true false false false true false false false false false false false false false false false false false false false false false false false false false false false false false false false false false false false false true 18 0 true 22 true false false false false false false false 0 false false false false false false false X 10 10 false false false false false false false true false false false true true true true false false false false false CA X X Carrie Ammerman 5304706037 117 New Mohawk Road Nevada City CA 95959 Jeffrey Lauder Executive Dir. 40.00 0.00 X X 91530 0 0 John Duff Director 2.00 0.00 X 0 0 0 Marsha Burch Secretary 1.00 0.00 X 0 0 0 Jonathan Farrell Director 2.00 0.00 X X 0 0 0 Leslie Estes Treasurer 2.00 0.00 X 0 0 0 Inge Ivens Director 2.00 0.00 X X 0 0 0 Poyom Riles President 2.00 0.00 X 0 0 0 Lynn Barakos Director 2.00 0.00 X 0 0 0 Alex Palm Director 1.00 0.00 X 0 0 0 Dave Herbst Vice President 6.00 0.00 X 0 0 0 91530 0 false false false 0 2000 1817995 191679 2011674 Fee for Service 127009 127009 Sales Tuition 10995 10995 138004 9298 9298 0 0 0 8891 2077 8891 -2077 6814 6814 0 0 324 436 -112 -112 Other Income, refunds, rewards 2454 2454 2454 2168132 147160 9298 X 0 0 0 0 91529 49518 36415 5596 0 702578 454178 233108 15292 0 136343 136343 65970 41515 22644 1811 0 325 325 18551 18551 0 0 0 940818 897052 16488 27278 0 0 19420 15358 4062 0 92869 87063 5806 39886 19400 18246 2240 0 0 0 0 19592 19592 22214 21540 674 Project Materials / Supplies 29150 29150 Project Misc 25886 25886 Project Lab Supplies 23698 23698 Lab Supplies 10832 10832 25818 740 13546 11532 2265479 1541137 650051 74291 37678 61087 555107 1023587 0 200030 158753 0 0 0 0 0 91811 64782 48698 27029 45544 63934 0 0 0 1994 1996 889051 1336386 56039 86708 147541 653237 25254 24678 228834 764623 X 660217 520236 51527 660217 571763 889051 1336386 -97347 8893 X false false false X 980491 1139982 1393547 1977995 2011674 7503689 63846 96109 114579 138004 412538 0 0 0 980491 1203828 1489656 2092574 2149678 7916227 0 0 7916227 1659 66 564 333 18189 20811 0 1659 66 564 333 18189 20811 0 103290 2054 18805 3215 2342 129706 1085440 1205948 1509025 2096122 2170209 8066744 0.98130 0.97880 0.00260 0.00050 X RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED 5313 4062 1251 86498 60720 25778 27029 Direct Deposit Payable 75 Payroll Liabilities 24537 Sales Tax Payable 66 24678 Form 990, Part VI, Section B, Line 11b No review was or will be conducted. Form 990, Part VI, Section C, Line 19 No documents available to the public.