Lock and Dam No. 22

{{Short description|Dam on the Upper Mississippi River, US}}

{{Use American English|date=January 2025}}

{{Use mdy dates|date=August 2023}}

{{Infobox dam

| name = Lock and Dam No. 22

| image = Mississippi River Lock and Dam number 22.jpg

| image_size = 250px

| image_caption = Mississippi River Lock and Dam No. 22

| name_official =

| dam_crosses = Upper Mississippi River

| res_name = Pool 22

| location = Cincinnati Township, Pike County, Illinois / Saverton Township, Ralls County, Missouri,
near Saverton, Missouri

| operator = 24px U.S. Army Corps of Engineers, Rock Island District

| dam_length = {{convert|1224|ft|m|1}} (movable portion)

| dam_height =

| dam_width_base =

| construction_began = 1934

| opening = July 22, 1938

| res_capacity_total = {{convert|80000|acre feet|km3|abbr=on}}

| res_catchment = {{convert|137500|mi2|km2|abbr=on}}

| res_surface =

| location_map = Missouri

| coordinates = {{coord|39|38|18|N|91|14|49|W|region:US_type:landmark|display=inline,title}}

| extra = {{Infobox NRHP

| name = Lock and Dam No. 22 Historic District

| embed = yes

| nrhp_type = hd

| nocat = yes

| image =

| caption =

| location = Secondary Rd. E, New London, Missouri

| locmapin = Missouri

| built = 1938

| architect = US Army Corps of Engineers; Abbott, Edwin E., et al.

| architecture =

| added = March 10, 2004

| area = {{convert|126.8|acre}}

| mpsub = Upper Mississippi River 9-Foot Navigation Project MPS

| refnum = 04000182{{NRISref|version=2010a}}

}}

}}

Lock and Dam No. 22 is a lock and dam located near Saverton, Missouri, on the Upper Mississippi River around river mile 301.2. The movable portion of the dam is {{convert|1224|ft|m|1}} long and consists of three roller gates and ten tainter gates. A {{convert|1600|ft|m|1}} long submersible earthen dike extends to a flood control levee on the Illinois shore. The main lock is {{convert|110|ft|m|1}} wide by {{convert|600|ft|m|1}} long; there is also an incomplete auxiliary lock.{{cite web|title=Lock & Dam 22 |url=http://www.mvr.usace.army.mil/Portals/48/docs/CC/FactSheets/Miss/LockandDam22.pdf |publisher=U.S. Army Corps of Engineers |url-status=dead |archiveurl=https://web.archive.org/web/20150122012144/http://www.mvr.usace.army.mil/Portals/48/docs/CC/FactSheets/Miss/LockandDam22.pdf |archivedate=January 22, 2015 }} In 2004, the facility was listed in the National Register of Historic Places as Lock and Dam No. 22 Historic District, #04000182 covering {{convert|1268|acre|km2|1}}, 1 building, 5 structures, 4 objects.

When the northern part of Mississippi froze in the first week of February 2007, upwards of 20 bald eagles flew down to fish in the churning waters below Lock and Dam No. 22.{{cn|date=May 2024|reason=The 20 eagle number is 17 years old and we need a citation}}

align="center" |File:Public Works Administration Project, Army Corps of Engineers, Lock - NARA - 197015.tif and Army Corps of Engineers building Lock and Dam No. 22]] |File:Lock and dam 22.png