Lock and Dam No. 25

39°00′17″N 90°41′11″W / 39.00472°N 90.68639°W / 39.00472; -90.68639Construction began1935Opening dateMay 18, 1939Operator(s) U.S. Army Corps of Engineers, St. Louis DistrictDam and spillwaysImpoundsUpper Mississippi RiverLength1,296 feet (395.0 m)ReservoirCreatesPool 25Total capacity176,000 acre⋅ft (0.217 km³)Catchment area142,000 sq mi (370,000 km²)Surface area18,000 acres (73 km²) Location10 Sandy Slough Rd., Winfield, MissouriArea316.4 acres (128.0 ha)Built1939ArchitectUS Army Corps of Engineers; Griffin, Almern FrederickMPSUpper Mississippi River 9-Foot Navigation Project MPSNRHP reference No.04000184^[1]Added to NRHPMarch 10, 2004

Lock and Dam No. 25 is a lock and dam located near Winfield, Missouri, on the Upper Mississippi River around river mile 241.4. The movable portion of the dam is 1,296 feet (395.0 m) long and consists of three roller gates and 14 tainter gates. A 2,566 feet (782.1 m) submersible dike extends to the Illinois shore. A 5 miles (8.0 km) long dike is part of the facility extending upstream on the Missouri side of the river. The main lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long.^[2] In 2004, the facility was listed in the National Register of Historic Places as Lock and Dam No. 25 Historic District, #04000184 covering 3,164 acres (12.8 km²), 2 buildings, 7 structures, 2 objects.

See also

• Public Works Administration dams list

References

External links

• USGS Reach 2, Pool 25
• Historic American Engineering Record documentation:
  • HAER No. MO-37, "Upper Mississippi River Nine-Foot Channel Project, Lock & Dam No. 25, Cap au Gris, Lincoln County, MO", 93 photos, 9 data pages, 7 photo caption pages
  • HAER No. MO-50, "Upper Mississippi River Nine-Foot Channel Project, Lock & Dam Nos. 24-27, Clarksville, Pike County, MO", 125 data pages