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Dredge Surveys


A detailed survey of a specific area (usually a 1 to 2 mile section) of the river. Dredge surveys can be split into two groups: pre-dredge surveys and post-dredge surveys. Pre-dredge surveys are analyzed to determine if dredging is required in a potentially problematic location. If dredging is required, these surveys are then used to layout the dredge cuts and to estimate the volume of material that will need to be moved. A post-dredge survey is completed after dredging has been completed in a specific location to ensure that the problematic area has been removed.

The Dredging Reference Plan (DRP) is intended to be used as a temporary replacement to the District's Low Water Reference Plan (LWRP) during the current extreme low water event. The DRP is based on an analysis of recent low water channel performance and is intended to provide a more accurate and consistent profile between the gages on the Middle Mississippi, using St. Louis as the main reference. The DRP is temporarily replacing the LWRP due to changes in the channel since the LWRP's last full re-calculation and acceptance. The plane was developed between each automated gage site based on recent low-water readings and shifted down to be defined as the plane correlating with a St Louis gage reading of -7.

- MRM 01.5-03.2 (LWRP14): August 25, 2020
- MRM 08.0-09.0 (LWRP14): January 08, 2020
- MRM 10.8-11.8 (LWRP14): January 08, 2020
- MRM 14.7-16.2 (LWRP14): December 07, 2020 
- MRM 15.0-16.2 (LWRP14): October 15, 2020
- MRM 15.0-16.0 (LWRP14): September 16, 2020
- MRM 15.2-16.1 (LWRP14): September 02, 2021 NEW
- MRM 15.3-17.4 (LWRP14): July 21, 2020
- MRM 15.5-16.2 (LWRP14): January 08, 2020
- MRM 21.0-22.5 (LWRP14): January 24, 2021 
- MRM 23.0-23.8 (LWRP14): October 15, 2020
- MRM 23.0-24.6 (LWRP14): November 12, 2020 
- MRM 23.7-24.3 (LWRP14): October 08, 2020
- MRM 23.8-25.0 (LWRP14): August 26, 2021 
- MRM 23.8-25.0 (LWRP14): July 30, 2021 
- MRM 23.9-25.0 (LWRP14): September 10, 2020
- MRM 24.0-24.7 (LWRP14): September 09, 2021 NEW
- MRM 26.4-28.7 (LWRP14): September 10, 2020
- MRM 26.9-28.7 (LWRP14): October 08, 2020
- MRM 27.2-28.7 (LWRP14): December 06, 2020 
- MRM 27.5-29.0 (LWRP14): August 26, 2021 
- MRM 33.5-35.0 (LWRP14): January 17, 2021 
- MRM 34.8-36.3 (LWPR14): September 06, 2021 NEW
- MRM 35.0-39.1 (LWRP14): September 10, 2020
- MRM 35.7-36.4 (LWRP14): October 12, 2020
- MRM 36.8-37.8 (LWRP14): September 06, 2021 NEW
- MRM 37.4-39.0 (LWRP14): October 12, 2020
- MRM 40.6-43.0 (LWRP14): December 14, 2020 
- MRM 40.6-43.0 (LWRP14): October 12, 2020
- MRM 40.6-43.7 (LWRP14): September 09, 2020
- MRM 40.8-42.2 (LWRP14): September 07, 2021 NEW
- MRM 41.4-42.5 (LWRP14): February 02, 2021 
- MRM 41.5-42.5 (LWRP14): January 14, 2021 
- MRM 41.9-42.4 (LWRP14): February 26, 2021 
- MRM 44.0-47.2 (LWRP14): January 05, 2021 
- MRM 45.0-47.0 (LWRP14): March 28, 2021 
- MRM 45.0-47.0 (LWRP14): February 25, 2021 
- MRM 45.0-47.2 (LWRP14): January 19, 2021 
- MRM 45.2-47.0 (LWRP14): September 07, 2021 NEW
- MRM 45.2-47.5 (LWRP14): October 20, 2020
- MRM 45.5-47.0 (LWRP14): February 08, 2021 
- MRM 45.5-47.0 (LWRP14): January 28, 2021 
- MRM 45.5-47.0 (LWRP14): January 22, 2021 
- MRM 46.3-47.0 (LWRP14): December 13, 2020 
- MRM 46.5-47.2 (LWRP14): December 03, 2020 
- MRM 47.7-48.2 SEMO (LWRP14): June 08, 2021 
- MRM 47.8-48.1 SEMO (LWRP14): August 31, 2021 
- MRM 47.8-48.2 SEMO (LWRP14): June28, 2020
- MRM 55.0-57.0 (LWRP14): January 21, 2021 
- MRM 55.7-56.4 (LWRP14): September 08, 2021 NEW
- MRM 56.0-57.0 (LWRP14): January 14, 2021 
- MRM 57.0-58.8 (LWRP14): January 27, 2021 
- MRM 57.8-58.8 (LWRP14): September 08, 2021 NEW
- MRM 57.8-59.0 (LWRP14): October 27, 2020 
- MRM 57.8-59.0 (LWRP14): September 08, 2020
- MRM 74.4-75.4 (LWRP14): November 12, 2020 
- MRM 76.1-76.8 (LWRP14): September 13, 2021 NEW
- MRM 79.5-80.7 (LWRP14): September 1, 2020
- MRM 79.5-80.8 (LWRP14): October 27, 2020
- MRM 79.5-80.8 (LWRP14): November 24, 2020 
- MRM 79.7-80.7 (LWRP14): September 13, 2021 NEW
- MRM 95.5-97.0 (LWRP14): January 06, 2021 
- MRM 101.8-103.5 (LWRP14): August 25, 2021 
- MRM 101.8-103.5 (LWRP14): September 01, 2020
- MRM 101.8-103.8 (LWRP14): June 24, 2021 
- MRM 101.8-103.8 (LWRP14): November 17, 2020 
- MRM 101.8-104.0 (LWRP14): September 21, 2020
- MRM 102.0-103.5 (LWRP14): July 29, 2021
- MRM 102.1-103.2 (LWRP14): September 12, 2021 NEW
- MRM 109.9-111.4 (LWRP14): December 30, 2020 
- MRM 114.3-115.8 (LWRP14): September 12, 2021 NEW
- MRM 115.0-116.0 (LWRP14): January 16. 2021 
- MRM 115.0-116.0 (LWRP14): December 15, 2020 
- MRM 115.1-116.0 (LWRP14): November 12, 2020 
- MRM 115.3-115.7 (LWRP14): December 22, 2020 
- MRM 120.5-124.4 (LWRP14): August 24, 2020
- MRM 122.0-123.0 (LWRP14): August 24, 2020
- MRM 125.0-126.9 (LWRP14): September 14, 2021 NEW
- MRM 128.4-130.0 (LWRP14): December 30, 2020 
- MRM 129.5-130.0 (LWRP14): January 13, 2021 
- MRM 131.8-132.5  (LWRP14): August 24, 2020
- MRM 136.5-137.3  (LWRP14): November 10, 2020 
- MRM 136.5-137.5  (LWRP14): August 24, 2020
- MRM 136.5-137.6 (LWRP14): December 03, 2020 
- MRM 144.8-145.8 (LWRP14): September 03, 2020
- MRM 145.0-145.8 (LWRP14): November 18, 2020 
- MRM 147.0-148.3 (LWRP14): November 18, 2020 
- MRM 147.0-149.0 (LWRP14): September 03, 2020
- MRM 150.0-162.5 (LWRP14): June 30, 2021 
- MRM 162.3-163.6 (LWRP14): September 24, 2020 
- MRM 162.4-163.4 (LWRP14): November 23, 2020 
- MRM 162.5-176.5 (LWRP14): June 30, 2021 
- MRM 162.5-163.6 (LWRP14): August 18, 2020
- MRM 166.0-167.0 (LWRP14): December 23, 2020 
- MRM 166.1-167.1 (LWRP14): September 24, 2020 
- MRM 166.2-167.0 (LWRP14): November 23, 2020 
- MRM 166.4-167.1 (LWRP14): August 18, 2020
- MRM 167.5-171.6 (LWRP14): June 23, 2021 
- MRM 167.5-172.1 (LWRP14): August 17, 2020
- MRM 167.6-169.9 (LWRP14): July 28, 2021 
- MRM 167.7-168.6 (LWRP14): December 23, 2020 
- MRM 167.7-172.0 (LWRP14): December 17, 2020 
- MRM 168.0-168.6 (LWRP14): November 23, 2020 
- MRM 168.5-171.6 (LWRP14): January 07, 2021 
- MRM 168.5-172.0 (LWRP14): November 09, 2020 
- MRM 170.7-171.7 (LWRP14): July 28, 2021 
- MRM 172.5-173.4 (LWRP14): February 03, 2021 
- MRM 172.6-173.8 (LWRP14): January 06, 2020
- MRM 172.7-173.4 (LWRP14): January 18, 2021 
- MRM 172.7-173.4 (LWRP14): January 04, 2021 
- MRM 172.7-173.4 (LWRP14): December 17, 2020 
- MRM 172.7-173.4 (LWRP14): November 23, 2020 
- MRM 172.7-173.8 (LWRP14): August 13, 2020
- MRM 172.8-173.5 (LWRP14): June 23, 2021 
- MRM 172.8-173.5 (LWRP14): July 28, 2021 
- MRM 174.5-176.0 (LWRP14): September 03, 2020
- MRM 174.5-176.0 (LWRP14): August 19, 2020
- MRM 174.5-175.5 (LWRP14): September 18, 2019 
- MRM 174.6-176.0 (LWRP14): December 03, 2020 
- MRM 175.6-177.8 (LWRP14): September 28, 2020 
- MRM 176.3-177.3 (LWRP14): November 23, 2020 
- MRM 176.5-177.2 (LWRP14): January 18, 2021 
- MRM 176.7-178.0 (LWRP14): September 03, 2020
- MRM 176.7-178.0 (LWRP14): August 19, 2020
- MRM 179.0-182.3 (LWRP14): October 05, 2020
- MRM 182.0-183.2 (LWRP14): February 23, 2021 
- MRM 182.0-183.2 (LWRP14): January 26, 2021 
- MRM 182.0-183.2 (LWRP14): December 03, 2020 
- MRM 182.0-185.0 (LWRP14): December 17, 2020 
- MRM 182.1-185.0 (LWRP14): January 12, 2021 
- MRM 182.2-185.0 (LWRP14): November 08, 2020 
- MRM 182.3-184.5 (LWRP14): October 15, 2020
- MRM 182.3-184.5 (LWRP14): October 05, 2020
- MRM 182.3-184.5 (LWRP14): September 07, 2020
- MRM 182.3-186.0 (LWRP14): September 13, 2020
- MRM 182.3-186.0 (LWRP14): September 20, 2020
- MRM 182.4-183.0 (LWRP14): January 04, 2021 
- MRM 182.4-183.0 (LWRP14): December 28, 2020 
- MRM 183.0-185.5 (LWRP14): August 12, 2021 
- MRM 183.5-184.5 (LWRP14): December 03, 2020 
- MRM 183.5-184.7 (LWRP14): January 06, 2020
- MRM 183.5-185.5 (LWRP14): July 23, 2020
- MRM 192.5-194.4 (LWRP14): July 22, 2020
- MRM 193.2-194.2 (LWRP14): September 03, 2020
- MRM 193.5-194.0 (LWRP14): October 13, 2020
- MRM 193.5-194.0 (LWRP14): September 22, 2020 
- MRM 193.5-194.2 (LWRP14): August 09, 2021 
- MRM 193.5-194.2 (LWRP14): November 30, 2020 
- MRM 195.3-196.2 (LWRP14): August 27, 2020
- MRM 195.3-196.3 (LWRP14): August 09, 2021 
- MRM 200.0-200.7 (LWRP14): February 08, 2021 
- MRM 200.0-200.7 (LWRP14): January 6, 2021 
- MRM 200.0-201.1 (LWRP14): November 30, 2020 
- MRM 200.1-200.7 (LWRP14): August 10, 2021 
-MRM 200.4-200.7 (LWRP14): May 15, 2020
- MRM 202.7-203.5 (MP): September 25, 2020
- MRM 217.0-219.0 (MP): April 29, 2021 
- MRM 217.4-219.2 (MP): June 29, 2020
- MRM 217.4-219.5 (MP): April 14, 2020
- MRM 220.0-222.5 (MP): September 17, 2020
- MRM 220.3-225.0 (MP): June 23, 2020
- MRM 220.4-222.4 (MP): May 6, 2021 
- MRM 220.4-222.4 (MP): March 23, 2020
- MRM 226.5-227.5 (MP): June 29, 2020
- MRM 226.8-227.4 (MP): June 21, 2021 NEW
- MRM 228.8-230.0 (MP): June 24, 2020
- MRM 229.0-229.5 (MP): March 23, 2020
- MRM 229.0-229.8 (MP): June 21, 2021 NEW
- MRM 234.0-235.2 (MP): July 28, 2021 NEW
- MRM 234.2-235.2 (MP): June 29, 2020
- MRM 234.3-235.2 (MP): June 21, 2021 NEW
- MRM 236.3-237.0 (MP): June 29, 2020
- MRM 240.5-241.5 (MP): July 7, 2020
- MRM 240.8-241.5 (MP): March 23, 2020
- MRM 241.0-241.5 (MP): June 23, 2021 NEW
- MRM 241.0-241.5 (MP): May 28, 2020
- MRM 241.0-241.5 (MP): September 24, 2020
- MRM 241.5-243.3 (MP): July 12, 2020
- MRM 241.5-244.0 (MP): July 21, 2021 
- MRM 241.5-244.0 (MP): September 17, 2020
- MRM 241.5-243.7 (MP): May 16, 2020
- MRM 247.0-247.5 (MP): June 23, 2021 
- MRM 247.0-248.0 (MP): July 20, 2020
- MRM 247.0-248.0 (MP): July 23, 2020
- MRM 248.8-249.6 (MP): August 11, 2021 NEW
- MRM 248.8-249.7 (MP): July 13, 2020
- MRM 251.3-252.2 (MP): July 27, 2018
- MRM 251.8-253.8 (MP): July 08, 2020
- MRM 252.5-253.5 (MP): August 20, 2020
- MRM 252.5-254.0 (MP): August 11, 2021 NEW
- MRM 252.7-253.9 (MP): June 22, 2021 
- MRM 252.8-253.5 (MP): March 24, 2020
- MRM 253.5-254.5 (MP): August 28, 2020
- MRM 254.5-255.3 (MP): June 22, 2021 
- MRM 254.5-257.5 (MP): July 19, 2020
- MRM 255.8-257.2 (MP): June 23, 2021 
- MRM 262.0-263.5 (MP): August 20, 2020
- MRM 262.0-263.5 (MP): July 14, 2020
- MRM 262.0-271.0 (MP): July 14, 2020
- MRM 265.3-266.8 (MP): July 31, 2021 
- MRM 265.3-266.5 (MP): June 19, 2021 
- MRM 265.5-267.5 (MP): July 14, 2020
- MRM 265.5-267.5 (MP): September 16, 2020
- MRM 265.9-266.8 (MP): March 24, 2020
- MRM 266.9-271.0 (MP): August 13, 2020
- MRM 267.5-271.0 (MP): September 16, 2020
- MRM 268.5-270.1 (MP): August 12, 2021 NEW
- MRM 268.4-270.0 (MP): June 24, 2021 
- MRM 269.8-271.0 (MP): July 31, 2021 
- MRM 271.9-272.4 (MP): July 15, 2020
- MRM 272.7-273.5 (MP): July 15, 2020
 
- MRM 273.5-275.0 (MP): May 11, 2020
- MRM 273.5-275.0 (MP): July 22, 2020
- MRM 273.8-275.0 (MP): June 19, 2021 
- MRM 280.3-281.7 (MP): November 19, 2020 
- MRM 288.5-290.0 (MP): August 13, 2020
- MRM 288.5-290.0 (MP): July 17, 2020
- MRM 288.8-290.0 (MP): August 17, 2021 NEW
- MRM 288.8-290.0 (MP): July 28, 2021 NEW
- MRM 288.9-290.0 (MP): June 19, 2021 
_MRM 289.0-290.5 (MP): November 19, 2020 
- IRM 26.3-27.3 (MP): August 27, 2020
- IRM 35.0-37.5 (MP): August 18, 2020
- IRM 35.1-35.8 (MP): November 24, 2020
- IRM 35.1-35.8 (MP): October 05, 2020 
- IRM 36.0-37.2 (MP): July 29, 2021 
- IRM 38.5-40.5 (MP): August 19, 2020
- IRM 39.8-41.5 (MP): July 29, 2021 
- IRM 43.0-45.0 (MP): July 30, 2021 
- IRM 43.7-46.5 (MP): August 26, 2020
- IRM 47.0-47.8 (MP): July 30, 2021 
- IRM 50.2-51.2 (MP): August 27, 2020
- IRM 53.5-54.2 (MP): August 27, 2020
- IRM 53.6-54.1 (MP): October 07, 2020 
- IRM 55.2-55.8 (MP): October 07, 2020 
- IRM 55.3-55.8 (MP): August 26, 2020
- IRM 57.8-59.3 (MP): August 26, 2020
- IRM 58.5-59.2 (MP): August 01, 2021 
- IRM 61.4-63.2 (MP): September 20, 2021 NEW
- IRM 61.4-63.7 (MP): August 01, 2021 
- IRM 61.5-63.5 (MP): August 25, 2020
- IRM 61.8-62.8 (MP): October 08, 2020 
- IRM 68.5-68.5 (MP): August 24, 2020
- IRM 73.0-79.4 (MP): August 20, 2020
- IRM 74.4-78.8 (MP): July 30, 2021 
- IRM 74.5-75.0 (MP): October 08, 2020 
- IRM 75.0-80.0 (MP): June 14, 2021 
- IRM 75.5-78.9 (MP): September 17, 2021 NEW
- IRM 76.0-78.5 (MP): December 08, 2020                
- IRM 76.0-79.5 (MP): February 07, 2021 
- IRM 78.5-80.0 (MP): December 18, 2020 
- KRM 0.0-0.8 (LWRP14): September 01, 2021NEW
- KRM 0.0-0.8 (LWRP14): June 06, 2021 NEW
- KRM 0.0-0.8 (LWRP14): September 14, 2020
- KRM 0.0-0.8 (LWRP14): June 25, 2020