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Dirt Jumps: Grey Dirt Resurface Process

Updated: Dec 2, 2020

Set out below is a recommended process for general resurfacing maintenance of the grey lines on the dirt jump pad, and can be performed on lips, landings, and transitions. This process is suitable where there is an existing supply of excess dry sediment available (for example in flat bottoms following a rain event).

  1. Prepare sediment by gentle scraping/agitation. Be careful not to dig into the base trail surface.

  2. Perform minor preparations to surface, such as a gentle sweep to remove any substantial loose material.

  3. Liberally wet down the entire surface.

  4. Throw the dry sediment across surface, aiming to achieve a thin layer all over. A good technique is to throw with a shovel almost parallel to the surface.

  5. Use a broom to gently sweep the dry sediment into the surface. The goal is to achieve a smooth "brushed" look.

  6. Gather excess materials at the base of the surface, or otherwise in a convenient location.

  7. Repeat steps 3 to 6 until a desired finish is achieved. Watering should be gentle on these repeat iterations, so as not to dislodge the new layers of sediment.

  8. Remaining excess material may be used for another surface. However, if the material is predominantly small rocks with minimal fine clay, that should be swept into ruts and the like off the riding line, and compacted into place.

  9. The surface should be lightly watered, and ridden in to achieve compaction via tires. Plate compaction can be used if there is sufficient moisture and bonding to achieve a smooth surface.

An example is shown in the videos below.

When doing this work, be sure to pay attention to flat bottoms as well as lips/landers. All riding surfaces should be kept smooth and compacted.

As always: (i) take your time; (ii) finish what you start; and (iii) have pride in your work. The goal always to strive for the original as-built condition, never to modify or change. Preparation is always key, along with ensuring you have the time and patience to see a job through to the end. Quick fixes never last.

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