US Army Corps of Engineers
St. Louis District

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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 15.1-16.5 (LWRP14): August 28, 2018
- MRM 19.5-21.5 (LWRP14): January 22, 2018
- MRM 22.0-23.5 (LWRP14): August 01, 2019 NEW
- MRM 38.0-29.0 (LWRP14): August 28, 2018
- MRM 38.0-40.0 (LWRP14): August 14, 2019 NEW
- MRM 38.6-40.0 (LWRP14): August 30, 2018
- MRM 34.9-36.3 (LWRP14): August 28, 2018
- MRM 38.3-39.7 (LWRP14): June 23, 2018
- MRM 40.8-42.5 (LWRP14): August 30, 2018
- MRM 42.5-43.8 (LWRP14): August 09, 2018
- MRM 46.4-47.6 (LWRP14): February 06, 2018
- MRM 47.7-48.3 SEMO (LWRP14): June 23, 2018
- MRM 47.8-48.2 SEMO (LWRP14): July 30, 2019 NEW
- MRM 65.5-68.3 (LWRP14): September 05, 2018
- MRM 65.9-66.5 (LWRP14): January 25, 2018
- MRM 95.4-96.7 (LWRP14): January 26, 2018
- MRM 98.5-100.5 (LWRP14): February 13, 2018
- MRM 124.9-125.8 (LWRP14): August 31, 2018
- MRM 160.0-161.2 (LWRP14): November 28, 2018
- MRM 160.0-161.0 (LWRP14): August 29, 2018
- MRM 166.0-167.5 (LWRP14): August 29, 2018
- MRM 166.1-167.5 (LWRP14): November 27, 2018
- MRM 167.5-170.0 (LWRP14): August 29, 2018
- MRM 167.5-170.0 (LWRP14): November 27, 2018
- MRM 170.0-172.0 (LWRP14): November 28, 2018 
- MRM 170.4-172.0 (LWRP14): August 27, 2018
- MRM 170.4-172.1 (LWRP14): January 29, 2018
- MRM 172.6-173.4 (LWRP14): August 27, 2018
- MRM 172.7-173.5 (LWRP14): November 28, 2018
- MRM 176.5-177.3 (LWRP14): November 28, 2018
- MRM 183.5-185.1 (LWRP14): November 07,2018
- MRM 183.7-184.6 (LWRP14): February 15, 2019 NEW
- MRM 185.3-194.2 (LWRP14): December 07, 2018 
- MRM 183.7-184.6 (LWRP14): December 13, 2018 
- MRM 193.2-194.1 (LWRP14): August 23, 2018
- MRM 193.3-194.2 (LWRP14): November 07, 2018
- MRM 193.6-194.2 (LWRP14): February 15,2019 NEW
- MRM 193.6-194.4(LWRP14): December 04, 2018 
- MRM 195.3-196.4 (LWRP!$): August 23, 2018
- MRM 200.0-200.7 (LWRP14): August 16, 2018
- MRM 200.0-200.7 (LWRP14): January 22, 2018
- MRM 200.0-200.7 (LWRP14): January 26, 2018
- MRM 200.0-201.0 (LWRP14): August 16, 2019 NEW
- MRM 202.5-203.3 (MP): February 27, 2018
- MRM 202.7-203.5 (MP): July 01, 2019 NEW
- MRM 202.7-203.5 (MP): October 02, 2018   
- MRM 202.8-203.5 (MP): August 16, 2018   
- MRM 202.8-204.5 (MP): May 17, 2018 
- MRM 203.0-204.5 (MP): February 21, 2018
- MRM 205.5-206.1 (MP): July 03, 2018 
- MRM 207.0-209.0 (MP): August 1, 2019 NEW
- MRM 217.4-219.5 (MP): July 01, 2019 NEW
- MRM 217.4-223.0 (MP): July 29, 2019 NEW
- MRM 217.5-218.9 (MP): March 07, 2019 
- MRM 218.0-219.5 (MP): October 02, 2018 
- MRM 218.0-219.5 (MP): May 31, 2018 
- MRM 218.0-220.0 (MP): November 08, 2018    
- MRM 220.5-222.4 (MP): July 01, 2019 NEW
- MRM 220.5-221.5 (MP): December 21, 2018 
- MRM 220.5-221.5 (MP): December 12, 2018   
- MRM 220.5-222.0 (MP): October 02, 2018 
- MRM 220.5-222.0 (MP): May 31, 2018 
- MRM 220.5-222.0 (MP): June 12, 2018 
- MRM 220.5-222.0 (MP): July 12, 2018 
- MRM 220.0-222.0 (MP): June 25, 2018 
- MRM 221.0-222.0 (MP): March 08, 2019 
- MRM 222.0-225.0 (MP): July 26, 2018
- MRM 223.0-225.7 (MP): July 23, 2019 NEW
- MRM 226.8-227.4 (MP): March 08, 2019
- MRM 226.3-227.5 (MP): June 11, 2018 
- MRM 226.5-227.5 (MP): July 12, 2018 
- MRM 226.8-227.5 (MP): July 01, 2019 NEW
- MRM 229.0-230.0 (MP): July 23, 2019 NEW
- MRM 229.0-230.0 (MP): June 11, 2018 
- MRM 232.0-233.2 (MP): July 23,  2019 NEW
- MRM 233.6-235.1 (MP): June 11, 2018 
- MRM 234.0-235.5 (MP): July 23, 2019 NEW
 -MRM 234.2-235.2 (MP): July 26, 2018 
- MRM 236.0-237.0 (MP): July 24, 2019 NEW
- MRM 239.8-241.3 (MP): July 23, 2019 NEW
- MRM 240.0-241.2 (MP): July 25, 2018 
- MRM 240.5-241.3 (MP): March 06, 2019
- MRM 240.9-241.5 (MP): August 06, 2019 NEW
- MRM 241.5-244.0 (MP): July 02, 2019 NEW
- MRM 241.5-244.0 (MP): December 18, 2018 
- MRM 241.5-243.5 (MP): August 27, 2018  
- MRM 241.5-243.8 (MP): July 24, 2018
- MRM 241.5-244.0 (MP): February 22, 2018
- MRM 247.6-248.5 (MP): July 27, 2018
- MRM 249.0-250.0 (MP): July 23, 2019 NEW
- MRM 251.3-252.2 (MP): July 27, 2018
- MRM 251.5-252.2 (MP): July 22, 2019 NEW
- MRM 251.6-253.4 (MP): December 18, 2018
- MRM 251.7-253.7 (MP): September 24, 2018 
- MRM 252.7-253.8 (MP): July 27, 2018
- MRM 252.8-254.2 (MP): July 03, 2019 NEW
- MRM 253.0-254.0(MP): March 07, 2019
- MRM 254.0-256.0 (MP): August 14, 2018
- MRM 254.0-256.0 (MP): July 13, 2018
- MRM 254.5-255.3 (MP): July 23, 2019 NEW
- MRM 256.0-257.5 (MP): July 22, 2019 NEW
- MRM 262.5-263.3 (MP): July 03, 2019 NEW
- MRM 262.5-263.3 (MP): August 08, 2019 NEW
- MRM 265.2-267.8 (MP): July 27, 2018
- MRM 266.0-268.0 (MP): July 22, 2019 NEW
- MRM 268.0-271.0 (MP): July 24, 2019 NEW
- MRM 268.4-271.0 (MP): July 27, 2018
 
- MRM 273.5-275.2 (MP): July 03, 2019 NEW
- MRM 273.5-275.0 (MP): February 23, 2018  
- MRM 273.5-275.0 (MP): July 26, 2018
- MRM 273.5-275.2 (MP): February 15, 2019
- MRM 273.8-273.5 (MP): June 04, 2018
- MRM 280.5-282.0 (MP): July 31, 2019 NEW
- MRM 289.0-290.0 (MP): July 24, 2018
- IRM 35.0-35.8 (MP): July 31, 2018
- IRM 35.1-35.7 (MP): July 30, 2019 NEW
- IRM 36.4-37.2 (MP): July 31, 2018
- IRM 38.5-40.0 (MP): July 31, 2018
- IRM 39.8-40.5 (MP): July 30, 2019 NEW
- IRM 43.2-45.5 (MP): July 31, 2018
- IRM 44.3-45.8 (MP): January 23, 2018                           
- IRM 58.5-59.0 (MP): July 30, 2019 NEW
- IRM 61.5-62.1 (MP): July 30, 2019 NEW
- IRM 61.5-63.5 (MP): July 30, 2018
- IRM 62.4-63.7 (MP): July 31, 2019 NEW
- IRM 64.5-65.1 (MP): July 30, 2018
- IRM 73.0-73.7 (MP): July 30, 2018
- IRM 75.5-78.8 (MP): July 31, 2019 NEW
- IRM 76.0-78.3 (MP): August 20, 2018
- IRM 76.0-78.2 (MP): August 9, 2018
- IRM 76.0-79.0 (MP): July 30, 2018
- IRM 76.3-77.5 (MP): November 16, 2018 
- KRM 0.0-0.8 (LWRP14) July 17, 2018  
- KRM 0.0-0.8 (LWRP14): November 26, 2018  
- KRM 0.0-0.8 (LWRP14): January 25, 2019  
- KRM 0.0-0.8 (LWRP14): July 31, 2019 NEW