BlockFrom the record
One of 33 National Register listings published here for Clinton County · listed in 2024 · category: Building.
Sources: the National Register database, National Park Service
Iowa Mutual Insurance Company Home Office
Listed on the National Register of Historic Places in 2024.
The listing
- What is counted as historic. The nomination lists 2 buildingss, 1 structure as contributing to the listing.
- Still standing. The Park Service records this property as extant.
- Address. 509 9th Street, DeWitt, 52742
- When was it listed? August 2024
- Category. building
- Township. DeWitt township
- National Register reference number. 100010667 - assigned by the National Park Service when the property was listed.
Fires near this property
1 since 2015Regional context, not property-specific evidence. The federal wildfire occurrence database lists 1 fire within 5 miles of Iowa Mutual Insurance Company Home Office in 2015, burning about 15 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 | 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 |
|---|---|---|---|---|
| 14 April 2015 | Debris and open burning | 15 acres | Iowa Department of Natural Resources | not named |
Mines and quarries near this property
5 within 5 milesRegional context, not property-specific evidence. The federal mineral resources record lists 5 workings within 5 miles of Iowa Mutual Insurance Company Home Office: 4 past producers, 1 producer. 1 still produces. What was taken out: Stone, Crushed/Broken, Sand and Gravel, Construction, Sand and Gravel, Construction, Stone, Crushed/Broken. 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 |
|---|---|---|---|---|
| Behr Quarry | Sand and Gravel, Construction, Stone, Crushed/Broken | Producer | ||
| Piggott Pit | Sand and Gravel, Construction | Past Producer | ||
| Barbers Quarry | Stone, Crushed/Broken | Past Producer | ||
| Scott Quarry | Stone, Crushed/Broken | Past Producer | ||
| Unknown | Stone, Crushed/Broken | Past Producer |
Storms near this property
60 of 88 shownRegional context, not property-specific evidence. The National Weather Service names DeWitt, the town this property stands in, in 88 storm reports between 1995 and 2025: 44 thunderstorm wind, 21 hail, 9 flash flood, 8 flood. 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 1995 | Hail | DeWitt | $175,000 | no account filed |
| June 2008 | Thunderstorm Wind | Dewitt | $25,000 | Wind gusts estimated to be 65 mph blew the shingles and gutters off of about 5 houses on the east side of De Witt, IA near old Highway 30 at 2:50 pm June 7. Some small sheds also sustained roof and structural damage. |
| July 2003 | Thunderstorm Wind | Dewitt | $20,000 | Branches down |
| May 2017 | Thunderstorm Wind | Dewitt | $10,000 | The county emergency manager reported a hoop building had half of its soft roof torn off. |
| June 2010 | Thunderstorm Wind | Dewitt | $10,000 | Wind gusts estimated to be 70 mph blew several trees and limbs down throughout De Witt, IA around 500 am June 23. Some streets were blocked by fallen trees. |
| June 2010 | Flash Flood | Dewitt | $10,000 | Heavy rains resulted in flash flooding of several streets in De Witt, IA during the morning of June 23. The flood waters covered E 11th Street, which prompted its closure. In addition, Silver Creek was out of its banks. |
| June 1997 | Thunderstorm Wind | Dewitt | $10,000 | Thunderstorm winds plowed a broad path of destruction over western Clinton County downing numerous trees across the County and along the Wapsipinicon River. |
| June 1999 | Thunderstorm Wind | Dewitt | $7,000 | Damaging straight line winds near 70 mph downed numerous tree limbs throughout the town. A funeral home suffered damage to its roof when a tree landed on it. Two large umbrellas,valued at $2,000 each, weredestroyed at the Dewitt Aquatic Center. |
| July 2009 | Thunderstorm Wind | Dewitt | $5,000 | Wind gusts estimated to be 70 mph blew down several trees and utility poles in De Witt, IA around 900 pm July 24. |
| November 2005 | Hail | Dewitt | $5,000 | no account filed |
| July 1995 | Tornado (F0) | DeWitt | $5,000 | no account filed |
| June 2005 | Thunderstorm Wind | Dewitt | $4,000 | no account filed |
| June 2006 | Thunderstorm Wind | Dewitt | $3,000 | Large tree down with numerous limbs down and windows broken in one house. An RWIS at the junction of U.S. 30 & 61 recorded a wind gust of 47 knots (54 mph) at 0337 CST with successive gusts of 44 knots (51 mph) through nearly 0400 CST. |
| June 1998 | Thunderstorm Wind | Dewitt | $3,000 | Strong winds downed trees and power lines in Dewitt. |
| July 2007 | Thunderstorm Wind | Dewitt | $2,000 | Winds estimated to be 60 mph blew down some power lines on the northwest side of De Witt. |
| July 2011 | Thunderstorm Wind | Dewitt | $1,000 | Wind gusts estimated to be 70 mph blew down a large tree in DeWitt, IA around 615 am CDT July 11. Power and phone lines were severed. |
| July 2007 | Flash Flood | Dewitt | $1,000 | Three to six inches of rain fell in a short amount of time during the early morning hours of July 4th just south of De Witt, IA resulting in flash flooding. Flood waters 1 foot deep were observed flowing over Old Highway 61 south of town. Considerable standing water was still observed in De Witt around mid-morning. |
| July 1995 | Thunderstorm Wind | DeWitt | $1,000 | no account filed |
| July 2025 | Thunderstorm Wind | Dewitt | - | A trained spotter reported that many small to medium tree branches down. |
| July 2025 | Thunderstorm Wind | Dewitt | - | A COOP Observer reported that a large tree was down across the road in the subdivision. Delayed Report. The time of the event was estimated using radar. |
| April 2023 | Hail | Dewitt | - | An NWS employee reported that hail lasted for 2 minutes. |
| July 2023 | Thunderstorm Wind | Dewitt | - | Estimated wind gust of 60 mph with thunderstorm. |
| July 2023 | Thunderstorm Wind | Dewitt | - | Medium sized tree branches down over the road. |
| May 2023 | Thunderstorm Wind | Dewitt | - | Estimated winds around 60 mph from the thunderstorm. |
| July 2022 | Thunderstorm Wind | Dewitt | - | Wind gust recorded by a Iowa Department of Transportation RWIS. |
| June 2022 | Thunderstorm Wind | Dewitt | - | A large tree branch reported blown down. |
| July 2020 | Thunderstorm Wind | Dewitt | - | A large 3 to 4 foot diameter tree was blown down on 270th Street, southwest of DeWitt. |
| June 2020 | Flood | Dewitt | - | The Wapsipinicon River near De Witt rose above its major flood stage of 12.5 feet around 5 PM CST on June 28 and remained above major flood stage through the end of the month. The river crested at 12.83 feet around 730 PM on June 28. |
| June 2020 | Flood | Dewitt | - | The Wapsipinicon River near De Witt rose above its major flood stage of 12.5 feet around 1030 AM CST on June 6 and fell back below major flood stage around 1245 on June 7. The river crested at 12.57 feet at 5 PM CST on June 6. |
| March 2019 | Flood | Dewitt | - | Heavy rain and snow melt across the region caused the Wapsipinicon River near DeWitt to rise above major flood stage of 12.5 feet late in the day on March 13th. The river fell back below major flood stage very early on the 27th. The river crested at 13.20 feet later in the day on the 14th. |
| May 2019 | Flash Flood | Dewitt | - | Roads closed in DeWitt due to flash flooding. |
| April 2017 | Hail | Dewitt | - | An off duty NWS employee reported 1.50 inch hail. Time of the event was estimated using radar. |
| May 2017 | Thunderstorm Wind | Dewitt | - | The Iowa Department of Transportation measured this wind gust near DeWitt Iowa. |
| July 2017 | Thunderstorm Wind | Dewitt | - | The Clinton County Roads Department reported a few trees had to be cleared from secondary roads around the DeWitt area. |
| March 2017 | Thunderstorm Wind | Dewitt | - | A tree was uprooted on 5th and 11th causing damage to a house. Time was estimated by radar. |
| March 2017 | Tornado (EF2) | Dewitt | - | This is a continuation of the tornado that started in Walcott in Scott County, crossed the Wapsipinicon River into Clinton County, and ended near Goose Lake. Damage was primarily to farm outbuildings and trees. Some power poles were snapped. Max winds were estimated at 115 MPH and the tornado was rated EF2. |
| July 2017 | Tornado (EF0) | Dewitt | - | Tornado was rated EF-0 based on video evidence with peak winds of 65 mph, a path length of 1.25 miles, with a max path width 25 yards. The tornado damaged trees and a swing set. |
| July 2016 | Thunderstorm Wind | Dewitt | - | The De Witt law enforcement reported trees were down in the town. |
| July 2016 | Thunderstorm Wind | Dewitt | - | The emergency manager reported numerous trees were down on the southeast side of the town of De Witt. A few trees fell on the roofs of houses. |
| August 2016 | Thunderstorm Wind | Dewitt | - | An off duty NWS Employee reported an approximately 8 inch diameter tree that was 25 feet tall was pulled out of the ground near their residence. They estimated winds of 45 to 50 MPH. |
| April 2015 | Hail | Dewitt | - | Mostly dime to nickel sized hail fell, but some hail stones were the size of quarters. |
| June 2015 | Flash Flood | Dewitt | - | NWS employee reported the Silver Creek is 2 to 3 feet above its banks. |
| December 2015 | Flood | Dewitt | - | The Wapsipinicon River near DeWitt rose above the major flood stage of 12.5 feet at midnight on December 21 and fell below 12.5 feet around noon on December 24. The river crested at 12.97 feet at 9:15AM on December 22. |
| July 2014 | Thunderstorm Wind | Dewitt | - | Law Enforcement reported a two trees down in DeWitt along with several branches. |
| June 2014 | Thunderstorm Wind | Dewitt | - | Measured by RWIS station. |
| June 2013 | Flood | Dewitt | - | Heavy rain across the region late in June caused a second rise on the Wapsipinicon River near DeWitt. The river rose above the major flood stage of 12.5 feet late in the evening of the 25th and remained there through the end of the month. |
| May 2013 | Flood | Dewitt | - | Heavy rains the last week in May caused a rapid rise on the Wapsipinicon River 4 miles south of DeWitt. The river rose above the major flood stage of 12.5 feet in the morning hours of May 28th and fell below in the early morning hours of May 29th. |
| August 2012 | Thunderstorm Wind | Dewitt | - | Trained spotter reported a 5 inch tree was down. |
| May 2011 | Thunderstorm Wind | Dewitt | - | Wind gusts estimated to be 45 to 60 mph were observed in Dewitt, IA at 544 pm CDT May 22. |
| August 2011 | Heavy Rain | Dewitt | - | This is storm total rainfall. |
| May 2010 | Flash Flood | Dewitt | - | Heavy rains resulted in flash flooding of a city road on the southwest side of DeWitt, IA during the late afternoon hours of May 25. |
| April 2010 | Hail | Dewitt | - | Non-severe hail (<1.0) fell about 1 mile north of De Witt, IA on Highway 61 at 212 pm April 30. |
| June 2010 | Thunderstorm Wind | Dewitt | - | Wind gusts estimated to be 65 mph blew some tree limbs onto power lines in De Witt, IA around 450 am June 23. |
| June 2010 | Thunderstorm Wind | Dewitt | - | Wind gusts estimated to be 70 mph snapped two 18 to 24 inch diameter trees 1 mile west southwest of De Witt, IA around 500 am CDT June 23. |
| June 2008 | Thunderstorm Wind | Dewitt | - | Winds estimated to be 55 to 60 mph were observed in De Witt, IA at 9:57 am June 8. |
| June 2008 | Thunderstorm Wind | Dewitt | - | Wind gusts estimated to be 70 mph blew down some large trees in De Witt, IA at 2:45 pm June 7. This report was relayed by HAM Radio. |
| June 2008 | Thunderstorm Wind | Dewitt | - | Wind gusts estimated to be 60 to 65 mph caused some tree damage in De Witt, IA at 2:46 pm June 7. |
| July 2008 | Tornado (EF0) | Dewitt | - | An EF0 tornado touched down briefly just north of De Witt, IA around 245 pm July 10. No damage was reported. |
| March 2007 | Thunderstorm Wind | Dewitt | - | NWS employee in Dewitt estimated wind gusts to 60 mph. |
| July 2007 | Flash Flood | Dewitt | - | One to three inches of rain fell in a short amount of time during the early evening hours of July 9th in De Witt, IA resulting in some flash flooding. Flood waters over 6 inches deep were observed on residential roads and in widespread low-lying areas. |
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
4 within 8 milesOther 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 |
|---|---|---|---|
 | Ames Creek Bridge | 2.3 miles | 1998 |
 | Farmers and Merchants Savings Bank | 5.6 miles | 2001 |
 | Grand Mound Town Hall and Waterworks Historic District | 5.7 miles | 2001 |
 | Dugan's Saloon | 5.9 miles | 2001 |
Sources for this property
| National Archives record | The nomination case file for reference 100010667 in Record Group 79. |
| Clinton County | All 33 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.
- 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.