Lock and Dam No. 2

{{Short description|Dam on the Mississippi River in Minnesota, USA}}

{{For|the first lock and dam to be built on the Mississippi, which was also called Lock and Dam No. 2|Meeker Island Lock and Dam}}

{{Infobox dam

| name = Lock and Dam No. 2

| image = Mississippi River Lock and Dam number 2.jpg

| image_caption = Mississippi River Lock and Dam No. 2

| location_map = Minnesota

| name_official =

| dam_crosses = Upper Mississippi River

| res_name = Pool 2

| location = Dakota County / Washington County, Minnesota, United States. Near Hastings

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

| dam_length = {{convert|722|ft|m|1}} (movable portion)

| dam_height =

| dam_width_base =

| construction_began =

| opening = {{Start date and age|1930}}

| res_capacity_total = {{convert|787000|acre feet|km3|abbr=on}}

| res_catchment = {{convert|36990|mi2|km2|abbr=on}}

| res_surface =

| coordinates = {{coord|44|45|35|N|92|52|07|W|type:landmark|display=inline,title}}

| extra =

}}

Lock and Dam No. 2 is located along the Upper Mississippi River near Hastings, Minnesota and construction commenced in 1927. The eastern dam portion is {{convert|722|ft}} wide and has 19 tainter gates. A hydroelectric station that produces about 4.4 megawatts is owned by the city of Hastings, while the {{convert|110|×|600|ft}} lock is operated by the St. Paul district of the U.S. Army Corps of Engineers' Mississippi Valley Division. There's also a wide earthen dam on the western side of the facility.

Following construction, the original lock walls settled and began to lean out of alignment, so a replacement lock was built. It was finished in 1948. A rehabilitation phase ran from 1987 to 1995. In 2009, Lock and Dam No. 2 became home to the nation's first commercial, federally licensed hydrokinetic power facility, which is a partnership between the City of Hastings and Hydro Green Energy, LLC of Westmont, IL.

{{multiple image

| align = center

| total_width = 480

| image1 = Lock and dam 2.jpeg

| image2 = Lock&dam 2.jpg

| caption2 = {{center|lock and dam 2 tonnage}}

}}