Friends of Nachusa Grasslands
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      • About Community Scientists
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        • Bison
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Ditch and Water Flow
Picture
February 2, 2002
This tree line is the swale (aka the ditch) which runs north to south through the middle of the Big Woods Unit. The old Ditch Crossing is at the right edge just south of the large oak tree. (This tree finally died of oak wilt in the summer of 2012.) Photo looks to the east from East Knob.
Picture
February 2002 - Mike Hanson
Picture
February 2002 - Tom Mitchell
Picture
February 2002 - Gene St Louis
Much of the Ditch was cleared out on the first Big Woods Workday held jointly with the Dot/Doug Unit and Gene St Louis.
Burn piles #6 and #7 were created during that workday.​
Picture
February 9, 2002
Cedar tree at left of photo is large cedar in the middle of the first photo. Photo looks to the west at East Knob (before any cleanup) and at North Knob which is on right side of photo. This date and time was early morning on the first Big Woods workday.
Picture
January 24, 2004
Picture
December 17, 2009
Subsequent panorama photos of South Knob and North Knob. Only one tree remaining in the Ditch from 2002. It has since fallen down. 
Picture
April 13, 2011
Norris is dead but still standing on the north end of North Knob.
Picture
February 17, 2012
Two more dead trees have fallen down since this photo was taken. We can’t remove them without damaging surrounding important prairie forbs. Anyhow, they didn’t fall down until after we became really busy spraying birdsfoot trefoil. The ditch is now lined with nice sedges.

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8772 S. Lowden Road  (mailing address)            
2075 Lowden Road (Visitor Center)           
Franklin Grove, IL 61031

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  • Home
  • About Friends
    • Mission, Leadership, Objectives, and Financials
    • Executive Director – Mike Saxton
    • Friends Annual Meeting 2025
    • Endowments
    • Heritage Heroes Initiative
    • Friends Annual Reports
    • Newsletters >
      • PrairiE–Update (email)
      • A Prairie Calling (print and digital)
    • Commenting Policy
  • Plan Your Visit
    • Hours & Parking
    • Directions and Map
    • Visitor Center
    • Pet Policy
    • Public Bison Tours
    • Bison Viewing
    • Hiking >
      • Hiking Guidelines
      • Hiking Destinations
      • Guided Hikes
      • Stone Barn Savanna Tour
      • Visitor Center Trail
      • Scavenger Hunt
    • Trailhead — Thelma Carpenter Prairie
    • Fall Festival >
      • Yearly Festival
    • What's In Bloom?
    • Exploring Nachusa Grasslands on Your Own
    • Things to Do
    • Places to Eat and Stay
    • Local Sites to Visit and Explore
  • Donate
  • Calendar
  • Volunteer
    • Volunteer Opportunities
    • Thursday and Saturday Workdays >
      • Workday Signup
      • Workdays – November to February
      • Volunteer Workday Safety Protocols
      • Leader Workday Safety Protocols
      • Steward Workday Tips
    • Workday Email List
    • Volunteer Recognition
    • Docents
  • Stewardship
    • Nachusa Stewardship
    • Restorations
    • Planting Histories >
      • Stewardship Unit Planting Histories
      • Planting Histories in Chronological Order
    • Weed Reports
    • Native plant resources
    • Volunteer Stewards
    • Groups and Committees
    • Available Units
    • Controlled Burns
    • Prescribed Fire Recruitment
    • Restoration Publications
    • Stewardship Resources >
      • Seed Collection Guides
      • Invasive Plant Management
      • Invasive Identification
      • Monitoring
      • Resource Links
  • Science
    • Science at Nachusa Grasslands
    • Science Grants 2026
    • Science Grants by Year >
      • Science Grants 2021 to 2025 >
        • Science Grants 2025
        • Science Grants 2024
        • Science Grants 2023
        • Science Grants 2022
        • Science Grants 2021
      • Science Grants 2016 to 2020 >
        • Science Grants 2020
        • Science Grants 2019
        • Science Grants 2018
        • Science Grants 2017
        • Science Grants 2016
      • Science Grants 2011 to 2015 >
        • Science Grants 2015
        • Science Grants 2014
        • Science Grants 2013/2012/2011
    • Science Symposium 2025
    • 2025 Science Symposium Abstracts
    • Potential Research Topics
    • Scientific Publications
    • Anderson Science Award
    • Science Videos
    • Become a Community Scientist >
      • About Community Scientists
      • Butterfly Monitoring
      • Calling Frog Monitoring
      • Dragonflies & Damselflies
      • RiverWatch
  • About Nachusa
    • General Info
    • Nachusa Staff
    • Prairie Smoke Annual Reports
    • Plant Inventory >
      • Common Names
      • Genus Species
    • Animal Inventory >
      • Amphibians
      • Birds
      • Bison Bison >
        • Bison
        • Bison Babies Broadcast Videos
      • Fish
      • Insects
      • Mammals
      • Other Arthropods
      • Reptiles
    • History
    • Jobs
    • Hunting
    • Geology >
      • Geology Part 1
      • Geology Part 2
      • Geology Part 3
    • Websites of Interest
  • Teacher Resources
    • K-2nd grades
    • 3rd-5th grades
    • 6th-8th grades
    • High School
  • BLOG AND MEDIA
    • Nachusa Blog
    • In The News
    • Photo Gallery >
      • Spring Photos
      • Summer Photos
      • Autumn Photos
      • Winter Photos
    • Videos
  • Contact Us / FAQs