diff --git a/bin/historical/migrations/_common.py b/bin/historical/migrations/_common.py
new file mode 100644
index 000000000..a562c0ee1
--- /dev/null
+++ b/bin/historical/migrations/_common.py
@@ -0,0 +1,42 @@
+import os
+import subprocess
+import importlib
+import logging
+import tempfile
+import time
+
+import emission.core.get_database as edb
+
+DB_HOST_TEMPLATE = os.environ.get('DB_HOST_TEMPLATE', "mongodb://localhost:27017/openpath_prod_REPLACEME")
+
+if 'PROD_LIST' in os.environ:
+    PROD_LIST=os.environ['PROD_LIST'].split(",")
+else:
+    with tempfile.TemporaryDirectory() as tmpdirname:
+        print(f"created {tmpdirname=} to find list of configs")
+        os.chdir(tmpdirname)
+        proc = subprocess.run(
+              f"git clone https://github.com/e-mission/nrel-openpath-deploy-configs.git", shell=True)
+        filenames = os.listdir(f"nrel-openpath-deploy-configs/configs/")
+
+    PROD_LIST = [
+        fname.split(".")[0]
+        for fname in filenames
+          if fname and 'dev-' not in fname and 'stage-' not in fname
+    ]
+print(f"PROD_LIST: {PROD_LIST}")
+
+def run_on_all_deployments(fn_to_run):
+    """
+    Run the given function on the database for each deployment by setting the
+      DB_HOST environment variable in between each function call.
+    The list of deployments (PROD_LIST) is retrieved from the
+      nrel-openpath-deploy-configs repo upon initialization of this module.
+    """
+    for prod in PROD_LIST:
+        prod_db_name = prod.replace("-", "_")
+        print(f"Running {fn_to_run.__name__} for {prod} on DB {prod_db_name}")
+        os.environ['DB_HOST'] = DB_HOST_TEMPLATE.replace(
+            "REPLACEME", prod_db_name)
+        importlib.reload(edb)
+        fn_to_run()
diff --git a/bin/historical/migrations/all_deployments_template.py b/bin/historical/migrations/all_deployments_template.py
new file mode 100644
index 000000000..202e26f6e
--- /dev/null
+++ b/bin/historical/migrations/all_deployments_template.py
@@ -0,0 +1,8 @@
+import emission.core.get_database as edb
+
+from _common import run_on_all_deployments
+
+def print_connect_url():
+    print("Connecting to database URL"+edb.url)
+
+run_on_all_deployments(print_connect_url)
diff --git a/bin/historical/migrations/trim_fluff_from_composite_trips.py b/bin/historical/migrations/trim_fluff_from_composite_trips.py
new file mode 100644
index 000000000..86f6d790a
--- /dev/null
+++ b/bin/historical/migrations/trim_fluff_from_composite_trips.py
@@ -0,0 +1,52 @@
+import emission.core.get_database as edb
+
+from _common import run_on_all_deployments
+
+
+def trim_fluff_from_composite_trips():
+    """
+    Trim unnecessary fields from composite trips in the analysis_timeseries_db.
+    The shape of the remaining fields is unchanged.
+    """
+    print("Trimming fluff from composite trips")
+    analysis_ts = edb.get_analysis_timeseries_db()
+    for ct in analysis_ts.find({'metadata.key': 'analysis/composite_trip'}):
+        # print(f"Trimming {ct['_id']}, {ct['data'].get('start_ts')} - {ct['data'].get('end_ts')}")
+        for l in ct['data'].get('locations', []):
+            trim_entry(l, {
+                'metadata': [],
+                'data': ['loc', 'ts'],
+            })
+
+        for s in ct['data'].get('sections', []):
+            trim_entry(s, {
+                'metadata': [],
+                'data': ['start_ts', 'end_ts', 'sensed_mode', 'sensed_mode_str',
+                         'ble_sensed_mode', 'distance', 'duration'],
+            })
+
+        for key in ['start_confirmed_place', 'end_confirmed_place']:
+            trim_entry(ct['data'].get(key), {
+                '_id': True,
+                'metadata': ['key'],
+                'data': ['enter_ts', 'exit_ts', 'location', 'duration',
+                         'user_input', 'additions'],
+            })
+
+        analysis_ts.update_one(
+            {'_id': ct['_id']},
+            {'$set': {'data': ct['data']}}
+        )
+
+
+def trim_entry(entry, fields_to_keep):
+    if entry is None:
+        return
+    for key in list(entry):
+        if key not in fields_to_keep:
+            del entry[key]
+        elif isinstance(entry[key], dict) and isinstance(fields_to_keep, dict):
+            trim_entry(entry[key], fields_to_keep[key])
+
+
+run_on_all_deployments(trim_fluff_from_composite_trips)