Lock and Dam No. 24

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

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

{{Infobox dam

| name = Lock and Dam No. 24

| image = Mississippi River Lock and Dam number 24.jpg

| image_size = 250px

| image_caption = Mississippi River Lock and Dam No. 24

| name_official =

| dam_crosses = Upper Mississippi River

| res_name = Pool 24

| location = Belleview Precinct, Calhoun County, Illinois / Clarksville, Missouri, USA

| operator = 24px U.S. Army Corps of Engineers, St. Louis District

| dam_length = {{convert|1340|ft|m|1}}

| dam_height =

| dam_width_base =

| construction_began = July 1936

| opening = March 12, 1940

| res_capacity_total = {{convert|125363|acre feet|km3|abbr=on}}

| res_catchment = {{convert|140900|mi2|km2|abbr=on}}

| res_surface =

| coordinates = {{coord|39|22|36|N|90|54|30|W|type:landmark|display=inline,title}}

| extra = {{Infobox NRHP

| name = Lock and Dam No. 24 Historic District

| embed = yes

| nrhp_type = hd

| nocat = yes

| image =

| caption =

| location = 350 N. First St., Clarksville, Missouri

| locmapin = Missouri#USA

| built = 1940

| architect OR builder =

| architecture =

| added = March 10, 2004

| area = {{convert|102.7|acre}}

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

| refnum = 04000183{{NRISref|version=2010a}}

}}

}}

Lock and Dam No. 24 is a lock and dam located near Clarksville, Missouri around river mile 273.4 on the Upper Mississippi River. The main lock is {{convert|110|ft|m|1}} wide and {{convert|600|ft|m|1}} long with its bottom at an elevation of 430 feet. The auxiliary lock is not operational. Normal pool elevation behind the dam is 449 feet. The movable portion of the dam is {{convert|1340|ft|m|1}} long and consists of 15 submersible, elliptical, tainter gates. A {{convert|2720|ft|m|1}} submersible earthen dike extends from the movable dam to the Illinois shore.{{cite web|title=Lock and Dam 24 Information Sheet|url=https://www.mvs.usace.army.mil/Portals/54/docs/recreation/rivers/NavFactSheets/03Dam24.pdf|publisher=U.S. Army Corps of Engineers|access-date=September 11, 2017}} In 2004, the facility was listed in the National Register of Historic Places as Lock and Dam No. 24 Historic District, #04000183 covering {{convert|1027|acre|km2|1}}, 3 buildings, 15 structures, 4 objects.

align="center" |File:Mississippi River Lock and Dam number 24 east.jpg |

File:Lock and dam 24.png