Listed on the National Register of Historic Places in 1985.
“W. in Mayville, North Dakota was built in 1900. It was listed on the National Register of Historic Places (NRHP) in 1985.”
Wikipedia article Union Block (Mayville, North Dakota), CC BY-SA 4.0.
One of 22 National Register listings published here for Traill County · listed in 1985 · category: Building.
Sources: the Wikipedia article · 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 3 fires within 5 miles of Union Block between 2013 and 2020, burning about 6 acres 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 |
|---|---|
| Debris and open burning | 3 |
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 |
|---|---|---|---|---|
| 10 July 2020 | Debris and open burning | under an acre | North Dakota State Forest Service | CR#14 & JCT CR#19 DITCH FIRE |
| 7 May 2013 | Debris and open burning | under an acre | North Dakota State Forest Service | 14 |
| 16 April 2019 | Debris and open burning | 5.0 acres | North Dakota State Forest Service | HANSON FARM 477A 154 AVE NE |
Regional context, not property-specific evidence. The National Weather Service names Mayville, the town this property stands in, in 36 storm reports between 1994 and 2025: 19 thunderstorm wind, 10 hail, 3 flash flood, 2 tornado. 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 |
|---|---|---|---|---|
| July 2007 | Thunderstorm Wind | Mayville | $100,000 | A brick silo was blown over onto a parked farm truck. |
| August 1994 | Thunderstorm Wind | Mayville | $20,000 | A radio station had it's roof partially blown off. Rain then damaged equipment inside. |
| August 2001 | Thunderstorm Wind | Mayville | $10,000 | A grain bin was torn from its foundation and blown a mile away. |
| August 2002 | Thunderstorm Wind | Mayville | $5,000 | A 61 foot grain auger was blown over. |
| July 2001 | Thunderstorm Wind | Mayville | $1,000 | Trees were blown down. |
| August 2025 | Thunderstorm Wind | Mayville | - | Power lines down in Mayville. Winds estimated at 75 mph. Time estimated via radar. |
| June 2024 | Thunderstorm Wind | Mayville | - | Numerous trees down in Mayville, power outages, and cars under trees. Time estimated. |
| June 2024 | Thunderstorm Wind | Mayville | - | Trees down in Mayville, no injuries. Power is out, empty grain bins blown about and blocking HWY 200. |
| June 2024 | Thunderstorm Wind | Mayville | - | Video relayed from the media of a tree on a car in Mayville. Time estimated. |
| June 2023 | Hail | Mayville | - | Quarter-sized hail reported in Mayville. |
| July 2023 | Thunderstorm Wind | Mayville | - | NDAWN measurement 2 east of Mayville. |
| June 2021 | Thunderstorm Wind | Mayville | - | The NDAWN 2E of Mayville reported a 58 mph wind gust. |
| July 2021 | Thunderstorm Wind | Mayville | - | Received a report of power out, medium to large tree branches snapped, and a roof vent blown off, via social media. |
| June 2018 | Thunderstorm Wind | Mayville | - | Three 4100 bushel grain bins and a conveyor system were damaged on the north side of Mayville. Scattered trees were blown down over Traill County. |
| July 2017 | Hail | Mayville | - | Wind gusts to 50 mph accompanied the hail. |
| July 2016 | Thunderstorm Wind | Mayville | - | Large branches and power lines were blown down. |
| July 2015 | Funnel Cloud | Mayville | - | The funnel cloud was viewed from six miles west of Buxton. |
| June 2015 | Funnel Cloud | Mayville | - | A persistent wall cloud with funnel were observed near Mayville. |
| June 2012 | Hail | Mayville | - | Numerous quarter to walnut sized hail fell along with strong winds and brief heavy rains. |
| June 2012 | Hail | Mayville | - | A few dime to nickel sized hail fell. |
| June 2008 | Thunderstorm Wind | Mayville | - | The wind broke an apple tree in half. |
| July 2005 | Thunderstorm Wind | Mayville | - | Tree tops were snapped off 20 feet above ground level. |
| July 2003 | Thunderstorm Wind | Mayville | - | Trees were blown down in Mayville. |
| July 2002 | Flash Flood | Mayville | - | Over six inches of rain fell at Mayville, flooding several city streets. |
| August 2002 | Flash Flood | Mayville | - | Street flooding was reported. |
| June 2001 | Tornado (F0) | Mayville | - | A brief touchdown was reported along Interstate 29. |
| June 2001 | Tornado (F0) | Mayville | - | A brief touchdown was reported. |
| August 2001 | Thunderstorm Wind | Mayville | - | 70 mph winds were reported. |
| June 2019 | Hail | Mayville | - | no account filed |
| July 2017 | Hail | Mayville | - | no account filed |
| May 2004 | Hail | Mayville | - | no account filed |
| May 2004 | Hail | Mayville | - | no account filed |
| June 2004 | Hail | Mayville | - | no account filed |
| June 2003 | Hail | Mayville | - | no account filed |
| July 2003 | Thunderstorm Wind | Mayville | - | no account filed |
| June 2000 | Flash Flood | Mayville | - | no account filed |
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 |
|---|---|---|---|
 | Lura Building | under 500 feet | 1985 |
 | Delchar Theater | under 500 feet | 1985 |
 | First National Bank | under 500 feet | 1985 |
| Grinager Mercantile Building | under 500 feet | 1985 | |
 | Mayville Public Library | under 500 feet | 1977 |
 | Goose River Bank | under 500 feet | 1985 |
| National Archives record | The nomination case file for reference 85003353 in Record Group 79. |
| Wikipedia article | Community-written account of this property, licensed CC BY-SA. |
| Traill County | All 22 listed properties in this county. |
Block