diff --git a/backend/services/metadata_backfill.py b/backend/services/metadata_backfill.py
index 8117493..303328a 100644
--- a/backend/services/metadata_backfill.py
+++ b/backend/services/metadata_backfill.py
@@ -103,16 +103,20 @@ def _normalise(s: Optional[str]) -> str:
 # their full project_raw and the operator can edit them in the wizard.
 _PROJECT_LOC_SUFFIX = re.compile(
     r"""
-    \s*               # any leading whitespace
-    [-–—]             # hyphen or em-dash (separator before the Loc marker)
-    \s*               # optional spaces
-    (?:loc|location)  # 'Loc' or 'Location'
-    \.?               # optional period
-    \s*               # optional space
-    \#?               # optional '#'
-    \s*               # optional space
-    \d+               # required digit
-    \b                # word boundary
+    \s*                       # any leading whitespace
+    [-–—.]                    # separator: hyphen, em-dash, or period
+                              # (operators use any of these — see
+                              #  "Mont.Dam.Loc 2-R-25")
+    \s*
+    (?:loc|location)          # 'Loc' or 'Location'
+    \.?                       # optional trailing period after Loc
+    \s*
+    (?:no\.?\s*)?             # optional "No." or "No " before the digit
+                              # (e.g. "Loc No. 3", "Loc No 5")
+    \#?                       # optional '#'
+    \s*
+    \d+                       # required digit
+    \b
     """,
     re.IGNORECASE | re.VERBOSE,
 )