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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 15.0-16.3 (LWRP14): October 02, 2017
- MRM 15.0-16.3 (LWRP14): November 16, 2017
- MRM 19.5-21.5 (LWRP14): January 22, 2018
- MRM 27.0-29.0 (LWRP14): October 12, 2017
- MRM 28.0-29.0 (LWRP14): October 26, 2017
- MRM 35.0-35.8 (LWRP14): August 21, 2017
- MRM 37.4-39.7 (LWRP14): October 11, 2017
- MRM 37.4-39.4 (LWRP14): September 19, 2017
- MRM 37.5-39.1 (LWRP14): October 26, 2017
- MRM 37.6-39.4: (LWRP14): August 03, 2017
- MRM 38.0-40.0 (LWRP14): June 20, 2017 
- MRM 38.0-41.7 (LWRP14): August 21, 2017
- MRM 39.5-41.0 (LWRP14): September 20, 2017
- MRM 40.6-42.5 (LWRP14): November 07, 2017 
- MRM 41.0-42.5 (LWRP14): October 11, 2017
- MRM 41.2-42.5 (LWRP14): August 03, 2017
- MRM 41.4-42.3 (LWRP14): December 01, 2017 
- MRM 43.7-45.0 (LWRP14): November 16, 2017
- MRM 43.8-44.5 (LWRP14): October 12, 2017 
- MRM 45.3-46.5 (LWRP14): October 13, 2017 
- MRM 46.4-47.6 (LWRP14): February 06, 2018 NEW  
- MRM 46.4-47.6 (LWRP14): December 01, 2017 
- MRM 46.6-47.6 (LWRP14): November 07, 2017 
- MRM 46.9-48.0 (LWRP14): October 13, 2017
- MRM 47.7-48.2 SEMO (LWRP14): July 01, 2017 
- MRM 48.6-49.0 (LWRP14): August 04, 2017
- MRM 64.5-65.2 (LWRP14): August 21, 2017
- MRM 65.9-66.5 (LWRP14): November 21, 2017 
- MRM 65.9-66.5 (LWRP14): December 04, 2017
- MRM 65.9-66.5 (LWRP14): January 25, 2018 
- MRM 66.5-67.5 (LWRP14): September 25, 2017 
- MRM 66.5-67.5 (LWRP14): August 24, 2017
- MRM 66.6-67.5 (LWRP14): July 31, 2017 
- MRM 66.7-68.3 (LWRP14): January 04, 2017
- MRM 69.0-70.0 (LWRP14): September 25, 2017 
- MRM 73.0-73.6 (LWRP14): August 21, 2017
- MRM 74.0-74.8 (LWRP14): September 25, 2017 
- MRM 74.2-75.3 (LWRP14): October 16, 2017
- MRM 74.4-75.0 (LWRP14): November 21, 2017
- MRM 74.4-75.0 (LWRP14): December 04, 2017 
- MRM 74.5-79.0 (LWRP14): August 21, 2017
- MRM 76.0-78.2 (LWRP14): September 09, 2017 
- MRM 79.5-80.8 (LWRP14): October 16, 2017 
- MRM 79.5-80.8 (LWRP14): October 30, 2017 
- MRM 95.4-96.7 (LWRP14): January 26, 2018
- MRM 98.5-100.5 (LWRP14): February 13, 2018 NEW
- MRM 101.5-103.0 (LWRP14): January 03, 2017
- MRM 102.0-104.0 (LWRP14): September 25, 2017
- MRM 102.0-104.0 (LWRP14): July 28, 2017  
- MRM 102.0-104.0 (LWRP14): August 23, 2017
- MRM 116.0-116.7 (LWRP14): September 26, 2017  
- MRM 124.8-125.8 (LWRP14): September 25, 2017 
- MRM 166.3-167.1 (LWRP14): August 01, 2017
- MRM 167.6-170.3 (LWRP14): October 23, 2017 
- MRM 167.7-170.0 (LWRP14): August 02, 2017
- MRM 167.8-170.0 (LWRP14): December 05, 2017 
- MRM 170.3-172.1 (LWRP14): August 17, 2017
- MRM 170.3-172.1 (LWRP14): August 02, 2017
- MRM 170.3-173.4 (LWRP14): October 24, 2017 
- MRM 170.3-173.4 (LWRP14): November 20, 2017 
- MRM 170.3-173.6 (LWRP14): September 06, 2017 
- MRM 170.4-172.2 (LWRP14): December 06, 2017
- MRM 170.4-172.1 (LWRP14): January 29, 2018
- MRM 172.6-173.6 (LWRP14): August 01, 2017
- MRM 176.5-177.8 (LWRP14): September 29, 2017   
- MRM 176.5-178.0 (LWRP14): October 23, 2017
- MRM 177.2-177.7 (LWRP14): December 05, 2017
- MRM 182.5-185.3 (LWRP14): September 07, 2017 
- MRM 183.5-185.5 (LWRP14): August 01, 2017
 - MRM 183.7-185.3 (LWRP14): October 18, 2017
- MRM 193.0-194.1 (LWRP14): July 17, 2017
- MRM 193.0-194.3 (LWRP14): September 11, 2017 
- MRM 195.4-196.1 (LWRP14): August 16, 2017
- MRM 195.4-196.1 (LWRP14): August 07, 2017
- MRM 200.0-200.7 (LWRP14): December 29, 2017 
- MRM 200.0-200.7 (LWRP14): December 20, 2017 
- MRM 200.0-200.7 (LWRP14): January 22, 2018
- MRM 200.0-200.7 (LWRP14): January 26, 2018
- MRM 200.0-201.7 (LWRP14): August 22, 2017
- MRM 201.1-201.7 (MP): July 10, 2017
- MRM 202.5-203.3 (MP): February 27, 2018 NEW
- MRM 202.7-203.5 (MP): August 22, 2017
- MRM 202.7-203.5 (MP): August 04, 2017
- MRM 202.8-203.8 (MP): January 26, 2017
- MRM 202.8-203.6 (MP): April 25, 2017
- MRM 202.8-203.6 (MP): June 19, 2017
- MRM 202.8-203.8 (MP): April 06, 2017
- MRM 203.0-204.5 (MP): February 21, 2018 NEW
- MRM 217.7-219.6 (MP): July 05, 2017
- MRM 218.0-219.6 (MP): January 26, 2017
- MRM 220.5-222.0 (MP): July 18, 2017
- MRM 220.8-222.0 (MP): July 07, 2017
- MRM 221.0-222.0 (MP): June 20, 2017
- MRM 222.0-224.7 (MP): July 05, 2017
- MRM 223.0-224.8 (MP): July 18, 2017
- MRM 226.5-227.5 (MP): July 06, 2017
- MRM 227.0 - 227.5 (MP): August 04, 2017
- MRM 234.3-235.3 (MP): July 06, 2017
- MRM 240.3-241.5 (MP): November 07, 2017
- MRM 240.3-241.5 (MP): August, 04, 2017
- MRM 241.5-244.0 (MP): April 05, 2017
- MRM 241.5-244.0 (MP): February 22, 2018 NEW
- MRM 241.5-243.5 (MP): November 06, 2017
- MRM 241.5-243.5 (MP): July 17, 2017
- MRM 241.5-243.5 (MP): April 27, 2017
- MRM 241.5-243.7 (MP): June 20, 2017
- MRM 241.5-244.0 (MP): January 27, 2017
- MRM 242.0-243.2 (MP): July 27, 2017
- MRM 247.5-248.5 (MP): July 27, 2017
- MRM 253.0-256.5 (MP): August 24, 2017
- MRM 254.0-256.5 (MP): June 21, 2017
- MRM 254.0-256.5 (MP): October 23, 2017
- MRM 255.4-256.0 (MP): August 14, 2017
- MRM 256.3-257.3 (MP): July 07, 2017
- MRM 261.1-261.6 (MP): July 07, 2017
- MRM 262.8-264.0 (MP): July 27, 2017
- MRM 263.9-264.5 (MP): July 07, 2017
- MRM 265.2-267.5 (MP): July 07, 2017
- MRM 266.0-267.3 (MP): August 14, 2017
- MRM 266.0-267.3 (MP): July 27, 2017
- MRM 268.5-271.1 (MP): July 10, 2017
- MRM 268.6-271.0 (MP): July 27, 2017
- MRM 268.6-271.0 (MP): August 14, 2017
- MRM 272.6-273.5 (MP): July 10, 2017
- MRM 273.5-275.0 (MP): February 23, 2018 NEW  
- MRM 273.5-275.0 (MP): April 04, 2017
- MRM 273.5-275.0 (MP): November 06, 2017 
- MRM 273.5-275.0 (MP): July 10, 2017
- MRM 289.0-290.0 (MP): July 11, 2017
- MRM 289.0-289.8 (MP): July 31, 2017
- IRM 35.0-35.8 (MP): August 23, 2017
- IRM 38.5-40.5 (MP): October 16, 2017                  
- IRM 38.5-39.5 (MP): October 04, 2017                   
- IRM 39.5-41.0 (MP): September 20, 2017 
- IRM 44.3-45.8 (MP): January 23, 2018 
- IRM 53.5-54.0 (MP): August 23, 2017
- IRM 55.0-56.0 (MP): August 23, 2017
- IRM 61.5-64.1 (MP): August 23, 2017
- IRM 74.5-79.0 (MP): August 21, 2017
- IRM 75.3-76.1 (MP): September 25, 2017 
- IRM 75.8-79.5 (MP): October 04, 2017 
- IRM 76.0-78.2 (MP): September 18, 2017 
- IRM 76.7-77.7 (MP): September 20, 2017 
- IRM 78.0-79.5 (MP): September 25, 2017 
- KRM 0.0 to 1.0 (LWRP14): September 28, 2017   
- KRM 0.0-0.8 (LWRP14) August 08, 2017