Boise River and Canal Bridge

Listed on the National Register of Historic Places in 2007.

From the record

“The Boise River and Canal Bridge, in Caldwell, Idaho, is a three-span, 390 ft (120 m) Warren camelback through-truss design constructed in 1922 by the American Bridge Company from plans submitted by Caldwell city engineer Fred H. The site is where Oregon Trail pioneers forded the Boise River.”
Wikipedia article Boise River and Canal Bridge, CC BY-SA 4.0.

One of 44 National Register listings published here for Canyon County · listed in 2007 · category: Structure.

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 structure as contributing to the listing.
Address. Plymouth St., Caldwell, 83607
When was it listed? February 2007
Category. structure
Also known as. Metal Truss Highway Bridges of Idaho MPS
Census division. Caldwell
National Register reference number. 07000003 - 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

1 since 1994

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 1 fire within 5 miles of Boise River and Canal Bridge in 1994, burning about 43 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
Arson/incendiarism	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 August 1994	Arson/incendiarism	43 acres	Boise District	SINKER CR.

Every fire recorded in Canyon County

Mines and quarries near this property

10 of 13 shown

Regional context, not property-specific evidence. The federal mineral resources record lists 13 workings within 5 miles of Boise River and Canal Bridge: 6 producers, 4 unknowns, 2 past producers, 1 occurrence. 6 still produce. What was taken out: Sand and Gravel, Construction, 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
Blue Creek Clay Deposit	Clay	Occurrence
Clay Industrial	Clay	Unknown
Caldwell Pit & Plant	Sand and Gravel, Construction	Producer
Gravel Pit	Sand and Gravel, Construction	Past Producer
Gravel Pit	Sand and Gravel, Construction	Unknown
Gravel Pit	Sand and Gravel, Construction	Past Producer
Gravel Pit	Sand and Gravel, Construction	Unknown
Gravel Pit	Sand and Gravel, Construction	Producer
Gravel Pit	Sand and Gravel, Construction	Unknown
Ida State Mine 103	Sand and Gravel, Construction	Producer

Every working recorded in Canyon County

Storms near this property

14 since 1995

Regional context, not property-specific evidence. The National Weather Service names Caldwell, the town this property stands in, in 14 storm reports between 1995 and 2020: 6 thunderstorm wind, 2 lightning, 2 hail, 2 funnel cloud. The reports record 1 death and 5 injuries. 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 2002	Lightning	Caldwell	1 killed, 2 hurt	One man was killed instantly when struck by lightning while moving an aluminum irrigation pipe on an alfalfa farm near Sunnyslope. A second man, standing about four feet away, received serious burns to the head and shoulder.
October 2019	Thunderstorm Wind	Caldwell	2 hurt	The public in Caldwell reported several large trees and power lines down.
June 2001	Wildfire	Caldwell	1 hurt	no account filed
May 2005	Flash Flood	Caldwell	$50,000	no account filed
June 1996	Thunderstorm Wind	Caldwell	$20,000	no account filed
May 1996	Lightning	Caldwell	$15,000	no account filed
May 2020	Thunderstorm Wind	Caldwell	-	Damage was widespread across the valley including downed trees of various sizes.
April 2012	Hail	Caldwell	-	A National Weather Service employee reported one inch size hail and damage to vehicles.
August 2003	Thunderstorm Wind	Caldwell	-	High winds blew down trees and damaged power lines which knocked out power to over 8000 homesas well as traffic signals, tying up traffic in Canyon County during the afternoon and evening. Heavy rain also caused street flooding in Nampa and Caldwell.
April 1998	Funnel Cloud	Caldwell	-	Funnel clouds were observed over Lake Lowell by numerous weather spotters and a local television station. The funnels did not touch down. Numerous showers were in the area at the time.
March 1998	Funnel Cloud	Caldwell	-	Weather spotters and a local television station reported a small funnel cloud near Caldwell.
April 1997	Hail	Caldwell	-	During the afternoon and evening of April 30 1997 a series of strong and severe thunderstorms moved into Southwest Idaho. 3/4 inch hail was reported just south of Caldwell , Idaho and 1 inch hail was reported in just west of the Boise Airport.
April 1995	Thunderstorm Wind	Caldwell	-	,,,,,,,,Blowing Dust
August 1996	Thunderstorm Wind	Caldwell	-	no account filed

Every storm recorded in Canyon 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
A. K. Steunenberg House	1.4 miles	1982
Thomas K. Little House	1.4 miles	1980
North Caldwell Historic District	1.5 miles	1979
Caldwell Historic District	1.5 miles	1982
US Post Office-Caldwell Main	1.6 miles	1989
Caldwell Odd Fellow Home for the Aged	1.7 miles	1982

Sources for this property

National Archives record	The nomination case file for reference 07000003 in Record Group 79.
Wikipedia article	Community-written account of this property, licensed CC BY-SA.
Canyon County	All 44 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.