SECTION#4
For the following questions, please answer every item pertaining to the sub-base installation, if the sub-base installation was necessary due to the installation of the trail surface material. Leave blank if the response choice is not applicable to you. Some questions require you to fill in the blank with a corresponding answer.
22. Please indicate the date (year) of the sub-base installation:
23. Please indicate the aggregate type used and the depth at which it can be found (choose all that apply):
| Aggregate Type | Depth
0”- 4” |
Depth
5”- 8” |
Depth
>8” |
Depth
“Unknown” |
| Sand | ||||
| Gravel | ||||
| Cinders | ||||
| Crushed brick | ||||
| Unknown |
Other (please specify):
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