Benchmark - MMMCCCXXXI
| Benchmark Number | MMMCCCXXXI |
|---|---|
| Established In | 1924 |
| Condition | GOOD |
| Latitude | 42.25356 |
| Longitude | -81.90933 |
| Reference Benchmark | No |
| Vertical Datum Code | UNKNOWN |
| Type | PERMANENT_MARKER |
| Setting | HORIZONTAL |
| Description | A G.S.C. survey bolt set in lighthouse, at outer end of concrete breakwater, bolt in north wall, 67 cm from northeast corner and 52 cm above platform and 69 cm east of iron doors. Horizontal Position updated to NAD83CSRS in January 2010.
Horizontal position updated September 2018 based on description and Google Earth. Previous position: N 42.253056, W 81.91. Coordinates and condition updated from 2022 field notes. |
| Date | Elevation | Status | Vertical Datum Code |
|---|---|---|---|
| N/A | 176.306 | ACTIVE | IGLD1985 |
| N/A | 2.794 | ACTIVE | CDIGLD1985 |