Listed on the National Register of Historic Places in 1998.
One of 54 National Register listings published here for Clayton County · listed in 1998 · category: Structure.
Sources: the case file at the National Archives · the National Register database, National Park Service · the Wikipedia article
Regional context, not property-specific evidence. The federal wildfire occurrence database lists 1 fire within 5 miles of Mallory Township Bridge in 2006, burning under an acre in total. None started naturally. None was recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.
| Reported cause | Fires |
|---|---|
| Missing data/not specified/undetermined | 1 |
The most recent of them, most recent first, with the day each was reported and the service that recorded it.
| Date | Cause | Size | Reported by | Name on the report |
|---|---|---|---|---|
| 16 December 2006 | Missing data/not specified/undetermined | under an acre | Iowa Department of Natural Resources | not named |
Regional context, not property-specific evidence. The federal mineral resources record lists 11 workings within 5 miles of Mallory Township Bridge: 10 past producers, 1 unknown. None of them still produces. What was taken out: Stone, Crushed/Broken, Phosphorus-Phosphates, Sand and Gravel, Construction. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.
| Where | Site | Commodity | Status | Recorded |
|---|---|---|---|---|
| Hintz Pit | Sand and Gravel, Construction | Past Producer | ||
| Unknown | Sand and Gravel, Construction | Past Producer | ||
| Outcrop | Phosphorus-Phosphates | Past Producer | ||
| Roadcut | Phosphorus-Phosphates | Past Producer | ||
| Roadcut | Phosphorus-Phosphates | Past Producer | ||
| Anderegg Quarry | Stone, Crushed/Broken | Unknown | ||
| Boege Quarry | Stone, Crushed/Broken | Past Producer | ||
| Brown Quarry | Stone, Crushed/Broken | Past Producer | ||
| Morarend Quarry | Stone, Crushed/Broken | Past Producer | ||
| Osterdock Quarry | Stone, Crushed/Broken | Past Producer |
Regional context, not property-specific evidence. The National Weather Service names Osterdock, the town this property stands in, in 9 storm reports between 2011 and 2025: 3 thunderstorm wind, 3 hail, 1 flood, 1 heavy rain. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.
| When | Event | Place named | Harm | What the report says |
|---|---|---|---|---|
| June 2015 | Thunderstorm Wind | Osterdock | $30,000 | Trees were blown down and one home sustained severe roof damage in Osterdock. |
| July 2017 | Heavy Rain | Osterdock | $25,000 | South of Osterdock, and estimated 8.20 inches of rain fell. |
| July 2017 | Hail | Osterdock | $8,000 | Golf ball sized hail was reported south of Osterdock. |
| September 2016 | Hail | Osterdock | $5,000 | Golfball sized hail fell southeast of Garnavillo. |
| July 2011 | Flood | Osterdock | $5,000 | Water from the Turkey River went over several roads near Osterdock causing some minor damage. |
| June 2014 | Thunderstorm Wind | Osterdock | $2,000 | Trees were blown down in Osterdock. |
| April 2025 | Hail | Osterdock | - | The public reported half dollar sized hail 4 miles south-southwest of Osterdock. |
| March 2020 | Funnel Cloud | Osterdock | - | A funnel cloud was sighted southwest of Guttenberg. |
| May 2013 | Thunderstorm Wind | Osterdock | - | An estimated wind gust of 60 mph occurred southeast of Garnavillo. |
No historic map-sheet match is published for this property yet. That does not mean no map exists. This record needs a coordinate-quality review before it can be joined to a sheet boundary. Browse the county's mapped places while that work is pending.
Other National Register properties close enough to walk or drive between, ordered by distance from this one. Both positions come from the same geocoding pass that matched these properties to their map sheets.
| Photograph | Property | Distance | Listed |
|---|---|---|---|
 | Round Barn, Millville Township | 4.8 miles | 1986 |
 | Matt-Bahls House | 5.5 miles | 1984 |
 | Kolker House | 5.6 miles | 1984 |
| Stone Barn | 5.7 miles | 1984 | |
 | Parker House | 5.7 miles | 1984 |
 | Wehmer House | 5.8 miles | 1984 |
| National Archives record | The nomination case file for reference 98000809 in Record Group 79. |
| Wikipedia article | Community-written account of this property, licensed CC BY-SA. |
| Clayton County | All 54 listed properties in this county. |
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