The yard
A new quarry on old mining ground.
Locally & family owned.
We're a family developing our own land on Highway 150 in Bessemer. It was once an iron ore mine, which is where the headframe in our logo comes from. Today it holds over a million tons of rock.
So we opened a yard. We're a new operation and an MSHA-certified one, and we'd rather show you what we've got than tell you about it.
How the rock gets sorted
A loader feeds unscreened rock into our screening plant, and a three-deck screen sorts it into four products at once. Those piles get sold or run again through different screens to make more sizes.
That setup lets us mix and match screens to make the size a job calls for, from fines to 6" rock.
Testing
Lab results at a glance.
Independent labs have tested samples of our stone. Here are selected results for your estimator or engineer. Results apply only to the samples tested.
All of our rock is sized to spec. It's not ALDOT-approved. Check these results against your job's spec.
Physical Quality
Independent lab · Compared with ASTM C33 Class 5S limits
Test
#57 Stone
Oct 2025
Coarse aggregate
Jan 2025
C33 5S max
Los Angeles abrasion, %
46.4
35.7
50.0
Sodium sulfate soundness, 5 cycles, %
45.5 — does not meet
25.5 — does not meet
12.0
Clay lumps & friable particles, %
1.6
0.2
2.0
Lightweight chert, %
0.0
0.0
3.0
Coal & lignite, %
0.0
0.0
0.5
Bulk dry specific gravity
2.844
2.853
—
Absorption, %
1.5
1.2
—
Dry-rodded bulk density, pcf
99.5
119.7
—
Both samples exceeded the Class 5S soundness limit. If your job specifies ASTM C33, talk to us before you order.
Base Material
Independent lab · Proposed base sample · December 2025
Modified Proctor, max dry unit weight
151.1 pcf
Optimum moisture
6.4%
Corrected max dry density
157.0 pcf
Corrected optimum moisture
5.0%
Passing 3/4" sieve
80.7%
Passing #4 sieve
33.4%
Chemical Analysis
Independent lab · #57 Stone · ASTM C25 · October 2025
Silicon dioxide (SiO₂)
43.56%
Calcium carbonate (CaCO₃)
24.57%
Iron oxide (Fe₂O₃)
17.04%
Aluminum oxide (Al₂O₃)
6.14%
Magnesium carbonate (MgCO₃)
3.05%
Passing #200 sieve
8.6%
Stockpile Samples
Independent lab · Three samples from the top foot of the pile · June 2024
Sample
Classification (USCS)
Passing #200
Plasticity
Standard Proctor, max dry unit weight
D4S-1
GP, poorly graded gravel
1.2%
Nonplastic
139.8 pcf
D4S-2
GP-GM, poorly graded gravel with silt & sand
10.6%
Nonplastic
144.1 pcf
D4S-3
GW, well graded gravel
2.9%
Nonplastic
134.9 pcf
Need the official reports?
Contact Morgan Duncan at morgan@pynerock.com.
