Plagmann Round Barn

Listed on the National Register of Historic Places in 1986.

From the record

“The Plagmann Round Barn is an historic building located near Conroy in rural Iowa County, Iowa, United States. It was built in 1912 as a cattle barn by Charles and Richard Plagmann.”
Wikipedia article Plagmann Round Barn, CC BY-SA 4.0.

One of 10 National Register listings published here for Iowa County · listed in 1986 · category: Building.

Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service

The listing

What is counted as historic. The nomination lists 1 building as contributing to the listing.
Address. Off IA 209, Conroy, 52301
When was it listed? June 1986
Category. building
Also known as. Iowa Round Barns: The Sixty Year Experiment TR
Township. Hilton township
National Register reference number. 86001440 - the number the National Park Service assigned this property when it was listed, and the key its nomination file is catalogued under at the National Archives.

Fires near this property

21 since 2009

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 21 fires within 5 miles of Plagmann Round Barn between 2009 and 2020, burning about 81 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
Missing data/not specified/undetermined	14
Debris and open burning	4
Equipment and vehicle use	1
Power generation/transmission/distribution	1
Smoking	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
29 July 2020	Missing data/not specified/undetermined	1.0 acres	Iowa Department of Natural Resources	not named
10 May 2011	Missing data/not specified/undetermined	1.0 acres	Iowa Department of Natural Resources	2249 235TH ST. WILLIAMSBURG, IA 52361, IA
9 April 2009	Missing data/not specified/undetermined	1.0 acres	Iowa Department of Natural Resources	not named
8 April 2009	Missing data/not specified/undetermined	under an acre	Iowa Department of Natural Resources	not named
7 April 2013	Debris and open burning	30 acres	Iowa Department of Natural Resources	not named
5 April 2015	Debris and open burning	2.0 acres	Iowa Department of Natural Resources	not named
25 April 2016	Missing data/not specified/undetermined	under an acre	Iowa Department of Natural Resources	WILLIAMSBURG FIRE
23 April 2016	Missing data/not specified/undetermined	under an acre	Iowa Department of Natural Resources	WILLIAMSBURG FIRE

Every fire recorded in Iowa County

Storms near this property

5 since 2006

Regional context, not property-specific evidence. The National Weather Service names Conroy, the town this property stands in, in 5 storm reports between 2006 and 2012: 3 hail, 2 thunderstorm wind. 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
August 2012	Thunderstorm Wind	Conroy	-	Emergency Manager reported multiple trees down in rural areas between the towns of Marengo and Williamsburg. Time of the event was estimated using radar.
April 2010	Hail	Conroy	-	Non-severe hail (<1.0) fell in Conroy, IA at 520 pm April 5.
June 2008	Thunderstorm Wind	Conroy	-	Wind gusts estimated to be 60 mph blew down a 30 foot tall tree about 4 miles south of Marengo, IA at 6:15 pm June 8.
June 2008	Hail	Conroy	-	Nickel-sized hail fell in Conroy, IA at 5:55 pm June 12.
March 2006	Hail	Conroy	-	no account filed

Every storm recorded in Iowa County

Map coverage status

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.

Listed places nearby

5 within 8 miles

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.

Property	Distance	Listed
David and M. Maria Hughes House	5.1 miles	1996
Iowa County Courthouse	5.1 miles	1981
Upper South Hotel	5.2 miles	1966
Pilot Grove	6.7 miles	1977
Ladora Savings Bank	7.0 miles	1990

Sources for this property

National Archives record	The nomination case file for reference 86001440 in Record Group 79.
Wikipedia article	Community-written account of this property, licensed CC BY-SA.
Iowa County	All 10 listed properties in this county.

Provenance

Listing record. National Park Service National Register of Historic Places, listed-properties dataset, current to 2026-05-22.
Map join. Address geocoded through the United States Census geocoder, then tested against the published boundary of every sheet in the USGS Historical Topographic Map Collection.
How this page is made. Listing fields come from federal records; map-sheet coverage is a labelled coordinate-to-boundary calculation, not a source-field claim.
Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.
Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.