Round Barn, Washington Township

Listed on the National Register of Historic Places in 1986.

From the record

“The Round Barn, Washington Township is a historic building located south of Janesville, Iowa in Black Hawk County, United States. The building is a true round barn that measures 60 feet (18 m) in diameter.”
Wikipedia article Round Barn, Washington Township (Janesville, Iowa), CC BY-SA 4.0.

One of 51 National Register listings published here for Black Hawk 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 Wikipedia article

The listing

What is counted as historic. The nomination lists 1 building as contributing to the listing.
Address. Off US 218, Janesville, 50613
When was it listed? June 1986
Category. building
Also known as. Iowa Round Barns: The Sixty Year Experiment TR
Township. Washington township
National Register reference number. 86001417 - 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

4 since 2002

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 4 fires within 5 miles of Round Barn, Washington Township between 2002 and 2017, burning about 76 acres in total. None started naturally. 1 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	2
Arson/incendiarism	1
Equipment and vehicle use	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
3 June 2002	Equipment and vehicle use	under an acre	Iowa State Fire Marshal's Office	not named
18 March 2002	Arson/incendiarism	under an acre	Iowa State Fire Marshal's Office	not named
8 November 2009	Missing data/not specified/undetermined	75 acres	Iowa Department of Natural Resources	not named
19 October 2017	Missing data/not specified/undetermined	under an acre	Iowa Department of Natural Resources	not named

Every fire recorded in Black Hawk County

Mines and quarries near this property

10 of 14 shown

Regional context, not property-specific evidence. The federal mineral resources record lists 14 workings within 5 miles of Round Barn, Washington Township: 12 past producers, 2 producers. 2 still produce. What was taken out: Sand and Gravel, Construction, Stone, Crushed/Broken, Clay. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Site	Commodity	Status
Waterloo and Cedar Falls Brick Co.	Clay	Past Producer
Unknown	Stone, Crushed/Broken	Past Producer
Yokom Quarry	Stone, Crushed/Broken	Producer
Assink Sand & Gravel Pit	Sand and Gravel, Construction	Producer
Dobbs Pit	Sand and Gravel, Construction	Past Producer
Unknown	Sand and Gravel, Construction	Past Producer
Unknown	Sand and Gravel, Construction	Past Producer
Unknown	Sand and Gravel, Construction	Past Producer
Unknown	Sand and Gravel, Construction	Past Producer
Unknown	Sand and Gravel, Construction	Past Producer

Every working recorded in Black Hawk 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

6 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
James Newell Barn	2.7 miles	1976
Cedar Falls Ice House	3.3 miles	1977
Daniel and Margaret Wild House	3.3 miles	2017
Wild Historic District	3.3 miles	2019
Black Hawk Hotel	3.4 miles	2002
Cotton Theater	3.4 miles	1993

Sources for this property

National Archives record	The nomination case file for reference 86001417 in Record Group 79.
Wikipedia article	Community-written account of this property, licensed CC BY-SA.
Black Hawk County	All 51 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.
Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.