Diversion Dam and Deer Flat Embankments

Listed on the National Register of Historic Places in 1976.

From the record

“The Diversion Dam and Deer Flat Embankments is the collective name given in the U.S. National Register of Historic Places program to a set of three dams in the western United States in southwestern Idaho, near Boise and Nampa.”
Wikipedia article Diversion Dam and Deer Flat Embankments, CC BY-SA 4.0.

One of 167 National Register listings published here for Ada County · listed in 1976 · category: District.

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

The listing

Address. SE of Boise on Boise River, Boise, 83607
When was it listed? March 1976
Category. district
National Register reference number. 76000666 - 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.

Storms near this property

48 since 1993

Regional context, not property-specific evidence. The National Weather Service names Boise, the town this property stands in, in 48 storm reports between 1993 and 2024: 23 thunderstorm wind, 10 hail, 5 flash flood, 4 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
June 2023	Flash Flood	Boise	$1,000,000	Thunderstorms produced heavy rain across portions of the Lower Treasure Valley, including the city of Boise. Social media, weather spotter, and emergency manager reports indicated localized flooding.
September 1997	Flash Flood	Boise	$60,000	During the evening of September 11, a flash flood occurred in the foothills of the Boise Mountains. The foothills had received significant rainfall all day long. Between 500 pm and 600 pm MST a heavy shower dumped 4 tenths of an inch of rain in 9 minutes on the foothills triggering flash flooding into the north end of Boise. The wall of mud and debris was estimated at 15 feet high as it breached six flood control dams and washed over a golf course. While most of the damage consisted of mud and debris on local roadways, the golf course sustained damage and 12 houses were slightly damaged at the foundations. No injuries were reported. As of publishing , damages to roads in the city and clean up costs were estimated at at least 60,000 dollars.
September 1998	Thunderstorm Wind	Boise	$20,000	no account filed
July 2015	Flash Flood	Boise	$10,000	Heavy rain from slow moving thunderstorms caused flash flooding in the Boise metro area. Over an inch of rain fell in less than an hour across portions of Boise. Flash flooding was reported in the downtown area and in the north and northwest parts of the city.
September 1998	Lightning	Boise	$10,000	no account filed
September 1998	Thunderstorm Wind	Boise	$8,000	no account filed
April 1995	Thunderstorm Wind	Boise	$5,000	no account filed
May 2024	Thunderstorm Wind	Boise	-	A strong outflow boundary from a thunderstorm damaged several power lines around the Boise metropolitan area and Garden Valley. Around 2,000-3,000 people were estimated to be without power in both of those regions due to wind damage.
September 2024	Thunderstorm Wind	Boise	-	A large spruce tree was knocked down at Morris Hill Cemetery.
September 2024	Thunderstorm Wind	Boise	-	The public reported a large spruce tree was knocked down along with old juniper trees. Idaho Power reported that this caused 2000 customers to be without power in the Boise North End.
June 2023	Thunderstorm Wind	Boise	-	A tree fell on Park Center Boulevard and Highland Street, which blocked several lanes.
June 2023	Thunderstorm Wind	Boise	-	An NWS employee measured a wind gust of 50 knots in downtown Boise.
June 2023	Thunderstorm Wind	Boise	-	An NWS employee reported 50 knots of wind in southeast Boise.
May 2023	Thunderstorm Wind	Boise	-	A couple of large trees were knocked down near Quinn's Pond on the Boise Greenbelt.
March 2023	Heavy Rain	Boise	-	The mesonet station GW0891 in Boise measured 1.09 inches of rain.
March 2023	Heavy Rain	Boise	-	The mesonet station at BSUI1 measured 1.32 inches of heavy rain.
August 2013	Thunderstorm Wind	Boise	-	The KBOI ASOS at The Boise airport measured a thunderstorm wind gust of 60 MPH. Downed trees and power poles were reported across Ada County.
August 2012	Thunderstorm Wind	Boise	-	Thunderstorms that moved across Ada County caused damage around the Boise area, including tree tops torn off, a large tree snapped at its base, and residential fences blown down.
August 2009	Hail	Boise	-	A trained spotter reported large chunks of hail a little smaller than golf balls.
May 2008	Hail	Boise	-	A trained spotter reported 50 MPH winds and hail averaging three quarters of an inch and a few stones larger than one inch.
September 2007	Thunderstorm Wind	Boise	-	Gusty winds and rain ripped through the Treasure Valley, causing power outages and knocking down huge trees. KBCI TV reported numerous trees and power lines down across the Boise metro area.
May 2006	Thunderstorm Wind	Boise	-	Boise 7 SE Gust 60K
May 2004	Hail	Boise	-	No know damage
June 2004	Flash Flood	Boise	-	Flooding downtown Boise...see narrative below.
June 2004	Hail	Boise	-	See narrative below.
August 2004	Thunderstorm Wind	Boise	-	Trees and Power lines down.
August 2004	Thunderstorm Wind	Boise	-	Microburst winds...semi truck overturned, trees uprooted and roofs damaged.
July 2003	Thunderstorm Wind	Boise	-	Swan Falls Dam...Gust to were also observed 14SE of Boise.
February 2002	Thunderstorm Wind	Boise	-	A line of thunderstorms produced wind gusts to 44 knots (51 mph) and hail up to 3/4 inch diameter from 10 miles west of Boise into the city of Boise. Numerous trees and power lines were brought down by the storm.
May 1999	Lightning	Boise	-	During the afternoon of May 3rd a thunderstorm over Boise sent a bolt of lightning onto the Crane Creek Country Club golf course. Three golfers were knocked down when a the lightening struck the ground near by. None of the golfers felt an electric shock but the explosion knocked them to the ground. Medical authorities summoned to the scene determined that there were no injuries to the golfers.
July 1998	Hail	Boise	-	A severe thunderstorm produced 3/4 to 7/8 inch hail in Boise. 7/8 inch hail was observed at the Boise National Weather Service Office.
April 1993	Hail	Boise	-	A severe weather spotter reported hail, measuring 1.00 inch in diameter, falling from a thunderstorm 7 miles north of Boise. The storm also produced heavy rains and frequent lightning that lasted for almost an hour.
June 2006	Hail	Boise	-	no account filed
June 2006	Hail	Boise	-	no account filed
July 2002	Thunderstorm Wind	Boise	-	no account filed
July 2002	Flash Flood	Boise	-	no account filed
July 2002	Thunderstorm Wind	Boise	-	no account filed
May 2000	Hail	Boise	-	no account filed
September 1998	Flood	Boise	-	no account filed
September 1998	Flood	Boise	-	no account filed
June 1998	Flood	Boise	-	no account filed
June 1998	Flood	Boise	-	no account filed
July 1998	Thunderstorm Wind	Boise	-	no account filed
July 1997	Thunderstorm Wind	Boise	-	no account filed
July 1997	Lightning	Boise	-	no account filed
June 1997	Funnel Cloud	Boise	-	no account filed
July 1995	Hail	Boise	-	no account filed
July 1995	Thunderstorm Wind	Boise	-	no account filed

Every storm recorded in Ada 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.

Sources for this property

National Archives record	The nomination case file for reference 76000666 in Record Group 79.
Wikipedia article	Community-written account of this property, licensed CC BY-SA.
Ada County	All 167 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.
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.