07/23/2019
Thanks for all the likes and attention to my last post.
Here's some more thoughts on trails. My last post dealt with the importance of getting permission. This time I think I'll talk about the different types of impact that affect the amount of maintenance required to keep a trail in good condition.
Essentially there are a couple types of impact we should always consider when designing or creating a trail. This would apply to re-alignments, new trails and in many cases, even maintenance.
1– Natural impact- this comes in the form of nature’s constant attention to the job of reducing the earth to a gravitational leveling of the surface. Water, wind, and gravity wear away at surfaces causing erosion which deposits sedimentation at the bottom of every hill.
So what I'm trying to say here is water, wind and gravity work together to remove soil from your trail. USERS DON'T CAUSE EROSION. Bold statement, I know, but before you disagree, consider this; The amount of material removed by the users (bicycle tires, horse hooves, hiking boots) is minimal, even in wet situations. It literally takes wind, water and gravity to remove large amounts of material from a trail. Couple this with bad trail design and you have erosion. Motorized use is excepted. Adding a motor controlled by a throttle gives the user the ability to displace large amounts of material.
Most of you who design, build or maintain trails do so in a manner that manages the trail for natural impact. Keeping the elements from eroding your trail will help minimize much of your maintenance, right? Well-l-l, not entirely. In the last decade I've really come to understand there is another side to the coin and we really have to pay attention to how our trail users react to what we've done. Ever wonder why water bars don't work? See #2 for some possible insight.
2– User impact- this comes in many forms, a biker skidding a tire in an attempt to slow quickly, a horse punching deep holes in a soft or wet trail. It could be a hiker walking around a puddle and widening a trail because they don’t want wet feet or short cutting a switch back. Possibly a motorized user turning the throttle a bit too much on a hill or turn causing the tires to spin.
All these examples lead to premature and frequent maintenance through soil displacement, unauthorized trails or muddy trails. The bottom line here is these problems are all negative reactions to decisions you've made on your trail through location, structures you built (or didn't build), or repairs you made. If users go off trail or around obstacles, they are reacting to what you did. Next time you're out there, take a minute to watch how others react to something on a trail. Look for examples of both good and bad. You might be amazed at the insights you can gain.
Although erosion is a natural and unstoppable fact of life, it can be slowed to mimic a more natural process through proper design and construction.
Have fun, be safe.