Looks like 3 types of rock to me. I like seeing the different names for the same thing depending on where you are in this great big world.
Out here on the West coast it looks like a pile of 3/4" crushed nearest the machine, a pile of #3 in the middle, and some facing rock in the larger pile, if you go by the english measurements, as below:
""SECTION 72 SLOPE PROTECTION
516
GRADING OF ROCK SLOPE PROTECTION
Method B Placement
Percentage Larger Than*
Rock Classes
Mass 1T 1/2T 1/4T Light Facing No. 1 No. 2 No. 3
1.8-Tonne {2 Ton} 0-5 — — — — — — —
900-kg {1 Ton} 50-100 0-5 — — — — — —
450-kg {1/2 Ton} — 50-100 0-5 — — — — —
220-kg {1/4 Ton} 95-100 — 50-100 0-5 — — — —
90-kg {200 Lb} — 95-100 — 50-100 0-5 0-5 — —
34-kg {75 Lb} — — 95-100 — 50-100 50-100 0-5 —
11-kg {25 Lb} — — — 95-100 90-100 90-100 25-75 0-5
2.2-kg {5 Lb} — — — — — — 90-100 25-75
0.4-kg {1 Lb} — — — — — — — 90-100
(sorry the table didn't copy right, I fixed it best I could)
* The amount of material smaller than the smallest rock mass listed in the above tables
for any class of rock slope protection shall not exceed the percentage limit listed in
the above tables determined on a mass basis. Compliance with the percentage limit
shown in the above tables for all other rock masses of the individual pieces of any
class of rock slope protection shall be determined by the ratio of the number of
individual pieces larger than the specified rock mass compared to the total number of
individual pieces larger than the smallest rock mass listed in the above tables for that class""
The above is copied from CalTrans standard specs for rock slope protection (rip-rap)
