Table 4.1. Tree-Ring Dates, Structure 1, Roy's Ruin
| Tree-Ring Lab Number | Date | Elevation (m) | Vertical Provenience |
| 1027 | 992 vv | 96.53-96.58 | Surface 1, 0 to 5 cm above floor |
| 1035 | 1051 vv | 97.05-96.86 | Stratum 4-level 2 |
| 1025 | 1081 vv | 97.13-97.27 | Stratum 4-level 1 |
| 1015 | 1103 vv | 96.65-96.86 | Stratum 5 |
| 1014 | 1105 vv | 96.65-96.86 | Stratum 5 |
| 1022 | 1138 ++vv | 96.53-96.58 | Surface 1, 0 to 5 cm above floor |
| 1031 | 1138 +vv | 97.05-96.86 | Stratum 4-level 2 |
| 1018 | 1144 vv | 96.65-96.86 | Stratum 5 |
| 1026 | 1162 vv | 97.13-97.27 | Stratum 4-level 1 |
| 1034 | 1162 vv | 97.05-96.86 | Stratum 4-level 2 |
| 1017 | 1163 vv | 96.65-96.86 | Stratum 5 |
| 1012 | 1167 vv | 96.65-96.86 | Stratum 5 |
| 1033 | 1185 ++vv | 97.05-96.86 | Stratum 4-level 2 |
| 1023 | 1197 vv | 96.53-96.58 | Surface 1, 0 to 5 cm above floor |
| 1020 | 1204 vv | 96.65-96.86 | Stratum 5 |
| 1013 | 1206 +vv | 96.65-96.86 | Stratum 5 |
| 1037 | 1206 vv | 96.65-96.86 | Stratum 5 |
| 1024 | 1212 vv | 96.53-96.58 | Surface 1, 0 to 5 cm above floor |
| 1030 | 1213 v | 97.10 | Stratum 4-level 2 |
| 1032 | 1213 r | 97.05-96.86 | Stratum 4-level 2 |
| 1016 | 1223 vv | 96.65-96.86 | Stratum 5 |
Date symbol:
r = less than a full section is present, but the outermost ring is continuous around available circumference.
v = a subjective judgment that, although there is no direct evidence of the true outside on the sample, the date
is within a very few years of being a cutting date.
vv = there is no way of estimating how far the last ring is from the true outside. Many rings may be lost.
+ = one or a few rings may be missing near the outside whose presence or absence cannot be determined
because the series does not extend far enough to provide adequate crossdating.
++ = a ring count is necessary beyond a certain point in the series because crossdating ceases.