22. Geological red flags for municipalities? Like environmental studies, water drainage studies, etc

Record details

Video ID

R82nIpJO7ow

Published

2025-12-27

Availability

Public

Duration

1:09

Transcript

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Description snapshot

In this clip of The Pump Track Chat Podcast, Brandon Hetrick is asked about potential geological issues associated with pump track builds that Lititz should immediately be concerned with?

Hear the full conversation at https://youtu.be/6W4qgR5tTQw?si=Fl8RffWXZjd6u7OG

👉 Subscribe for more conversations about local projects, recreation, community development, and the people shaping our towns.

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Key Geological Issues for Pump Track Construction

1. Weak or unstable soils
Soft or loose soils — like sand, silt, clay, or peat — can shift under load, causing settling, cracking, or rutting in the track surface.
Geotechnical sources note that weak soils pose major dangers in construction and often require stabilization.

For a pump track, this can mean:
- Rollers deforming over time
- Berms slumping
- Water pooling in low spots

2. Expansive clays
Expansive soils swell when wet and shrink when dry, which can distort or crack any compacted riding surface.
These are a top problem found in geotechnical investigations.
On a pump track, this leads to:
- Seasonal heaving
- Surface cracking
- Constant maintenance

3. Poor drainage or high groundwater
Waterlogged soils lose strength and can cause erosion or collapse.
Construction guidance warns that unstable clay or sand without proper drainage leads to structural failures.

For pump tracks, this means:
- Rollers washing out
- Berms softening
- Muddy, unusable riding conditions

4. Slope stability and subsidence
If the track is built on a hillside or fill material, the ground may shift over time.

Geotechnical engineering emphasizes understanding ground behavior to prevent settlement or collapse.

This can cause:
- Cracks in asphalt pump tracks
- Uneven riding surfaces
- Long‑term structural instability

5. Need for soil improvement
When soils are weak, engineers often use ground‑improvement techniques like compaction, geotextiles, or soil stabilization.

These methods are commonly used to make marginal land buildable.
For pump tracks, this might include:
- Importing better dirt
- Using geogrid under rollers
- Adding drainage layers

🧭 Why this matters

Pump tracks rely on precise shaping and consistent compaction. If the ground beneath them moves, absorbs water, or fails to support the load, the riding surface quickly degrades.

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Transcript

Are there any immediate red flags for project areas that municipalities may be
project areas that municipalities may be considering like from maybe geological
considering like from maybe geological perspectives or anything?
perspectives or anything? >> Can you elaborate on that?
>> Can you elaborate on that? >> Sure. Like Okay. So, I'm a California
>> Sure. Like Okay. So, I'm a California transplant and everything in California
transplant and everything in California requires an environmental study and very
requires an environmental study and very little progress can be made. I'm not
little progress can be made. I'm not bashing California, right? I'm not
bashing California, right? I'm not trying to do that here. I'm just saying
trying to do that here. I'm just saying a reality is it very seems that very
a reality is it very seems that very little progress can be made because of
little progress can be made because of environmental issues quite often. So in
environmental issues quite often. So in lit as someone who knows this area
lit as someone who knows this area pretty well is there anything that you
pretty well is there anything that you could potentially foresee as being a
could potentially foresee as being a geographical area maybe even like is
geographical area maybe even like is something as simple simple wrong word I
something as simple simple wrong word I don't know the right word maybe we might
don't know the right word maybe we might run into an Indian burial ground site or
run into an Indian burial ground site or an excavation issue or what red flags
an excavation issue or what red flags have you seen in this area that we may
have you seen in this area that we may run into? The only red flag that I've
run into? The only red flag that I've seen in our area is water drainage
seen in our area is water drainage issues and getting a survey on where the
issues and getting a survey on where the water is going to go and what it might
water is going to go and what it might potentially do. Okay,
potentially do. Okay, >> that's that's really the biggest thing
>> that's that's really the biggest thing in our

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