Use 1880 fallback start date for ETL loader

daniel-slaugh · daniel-slaugh · commit a7dd1d3b6501 · 2026-02-18T10:10:30.000-07:00
diff --git a/src/hydroserverpy/etl/loaders/hydroserver_loader.py b/src/hydroserverpy/etl/loaders/hydroserver_loader.py
@@ -151,11 +151,11 @@ def _fetch_earliest_begin(
                     else p.target_identifier
                 )
                 datastream = self.client.datastreams.get(datastream_id)
-                raw = datastream.phenomenon_end_time or "1970-01-01"
+                raw = datastream.phenomenon_end_time or "1880-01-01"
                 ts = pd.to_datetime(raw, utc=True)
                 timestamps.append(ts)
         earliest = (
-            min(timestamps) if timestamps else pd.Timestamp("1970-01-01", tz="UTC")
+            min(timestamps) if timestamps else pd.Timestamp("1880-01-01", tz="UTC")
         )
         logger.debug("Found earliest begin date: %s", earliest)
         return earliest

Original file line number	Diff line number	Diff line change
`@@ -151,11 +151,11 @@ def _fetch_earliest_begin(`
`151`	`151`	`else p.target_identifier`
`152`	`152`	`)`
`153`	`153`	`datastream = self.client.datastreams.get(datastream_id)`
`154`		`- raw = datastream.phenomenon_end_time or "1970-01-01"`
	`154`	`+ raw = datastream.phenomenon_end_time or "1880-01-01"`
`155`	`155`	`ts = pd.to_datetime(raw, utc=True)`
`156`	`156`	`timestamps.append(ts)`
`157`	`157`	`earliest = (`
`158`		`- min(timestamps) if timestamps else pd.Timestamp("1970-01-01", tz="UTC")`
	`158`	`+ min(timestamps) if timestamps else pd.Timestamp("1880-01-01", tz="UTC")`
`159`	`159`	`)`
`160`	`160`	`logger.debug("Found earliest begin date: %s", earliest)`
`161`	`161`	`return earliest`