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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.

Survey depths are shown below a reference plane representing a low flow condition.  St. Louis District has two types of river systems, a pooled river created by the Lock and Dam system, and an open free flowing river without Locks and Dams.  In a pooled river system, the low flow condition is determined from the minimum water surface provided by the Lock and Dam system; this water surface is known as minimum pool.  In an open or free flowing river, such as the Mississippi River downstream of Locks 27, the low flow condition is called the Low Water Reference Plane (LWRP). The low flow condition the LWRP represents is the calculated water surface profile resulting from the 97% exceedance discharge based on a set period of record. This reference plane allows for common comparison between different points on the river. 

The most recent surveys are linked below.  Older surveys can be found by going to the USACE e-hydro website, where all available surveys are posted.

E-Hydro Link

 Middle Mississippi River, MRM 000-201
- MRM 0.8 - 1.7 (LWRP14): August 01, 2023 
- MRM 0.9 - 1.6 (LWRP14): August 31, 2022 
- MRM 0.9 - 1.8 (LWRP14): September 28, 2022 
- MRM 1.0 - 1.6 (LWRP14): June 22, 2023 
- MRM 9.2 - 10.3 (LWRP14): August 31, 2022 
- MRM 14.7-16.4 (LWRP14): July 25, 2023 
- MRM 15.0-16.0 (LWRP14): October 04, 2022 
- MRM 15.0-16.2 (LWRP14): August 16, 2022 
- MRM 15.0-16.3 (LWRP14): June 22, 2023 
- MRM 15.2-16.2 (LWRP14): August 31, 2022 
- MRM 15.3-15.7 (LWRP14): August 09, 2023 
- MRM 17.0-19.0 (LWRP14): August 31, 2022 
- MRM 23.2-24.7 (LWRP14): November 09, 2022 
- MRM 23.2-24.7 (LWRP14): September 02, 2022  
- MRM 23.7-24.7 (LWRP14): January 09, 2023 
- MRM 23.7-24.7 (LWRP14): December 01, 2022 
- MRM 23.7-25.1 (LWRP14): August 23, 2023 
- MRM 23.8-24.7 (LWRP14): October 04, 2022 
- MRM 23.9-25.0 (LWRP14): June 22, 2023 
- MRM 27.0-29.0 (LWRP14): September 02, 2022  
- MRM 27.1-29.0 (LWRP14): August 23, 2023 
- MRM 27.3-28.2 (LWRP14): October 04, 2022 
- MRM 27.3-29.0 (LWRP14): June 22, 2023 
- MRM 28.0-29.0 (LWRP14): January 16, 2023 
- MRM 28.0-29.0 (LWRP14): December 01, 2022 
- MRM 28.0-29.0 (LWRP14): October 12, 2022 
- MRM 34.5-37.0 (LWRP14): October 12, 2022 
- MRM 36.9-40.1 (LWRP14): June 23, 2023 
- MRM 37.0-38.5 (LWRP14): November 08, 2022 
- MRM 37.0-39.0 (LWRP14): September 03, 2022  
- MRM 38.0-40.0 (LWRP14): December 21, 2022 
- MRM 38.2-38.8 (LWRP14): November 25, 2022 
- MRM 39.4-40.3 (LWRP14): January 16, 2023 
- MRM 39.6-40.0 (LWRP14): September 02, 2022  
- MRM 39.6-40.2 (LWRP14): June 23, 2023 
- MRM 40.0-42.8 (LWRP14): December 21, 2022 
- MRM 41.0-42.7 (LWRP14): June 26, 2023 
- MRM 41.3-43.0 (LWRP14): September 03, 2022  
- MRM 41.5-42.5 (LWRP14): January 17, 2023 
- MRM 42.6-44.4 (LWRP14): September 15, 2022 
- MRM 44.0-45.1 (LWRP14): September 04, 2022  
- MRM 45.3-47.6 (LWRP14): January 17, 2023 
- MRM 45.3-48.2 (LWRP14): October 05, 2022 
- MRM 46.0-47.0 (LWPR14): January 12, 2022 
- MRM 46.0-47.8 (LWPR14): December 09, 2022 
- MRM 46.5-47.6 (LWPR14): December 14, 2022 
- MRM 47.8-48.1 SEMO (LWRP14): September 22, 2022 
- MRM 54.0-55.1 (LWRP14): September 06,2022 
- MRM 55.9-56.5 (LWRP14): June 26, 2023 
- MRM 58.0-58.8 (LWRP14): September 13, 2023 NEW
- MRM 58.0-58.8 (LWRP14): September 06,2022 
- MRM 58.0-59.1 (LWRP14): June 26, 2023 
- MRM 60.8-62.2 (LWRP14): January 12, 2023 
- MRM 61.0-62.0 (LWRP14): January 27, 2023 
- MRM 61.0-63.0 (LWRP14): July 02, 2023 
- MRM 63.0-64.2 (LWRP14): October 06, 2022 
- MRM 63.7-64.3 (LWRP14): July 02, 2023 
- MRM 65.7-66.3 (LWRP14): October 06, 2022 
- MRM 68.7-69.9 (LWRP14): September 13, 2023 NEW
- MRM 68.8-69.2 (LWRP14): October 06, 2022 
- MRM 68.8-70.0 (LWRP14): September 06,2022 
- MRM 69.0-69.8 (LWRP14): December 02, 2022 
- MRM 69.0-69.9 (LWRP14): November 16, 2022 
- MRM 69.1-70.0 (LWRP14): June 26, 2023 
- MRM 70.6-71.2 (LWRP14): June 27, 2023 
- MRM 71.9-72.4 (LWRP14): June 27, 2023 
- MRM 72.7-73.4 (LWRP14): September 07,2022 
- MRM 73.1-73.5 (LWRP14): June 27, 2023 
- MRM 74.7-75.5 (LWRP14): December 02, 2022 
- MRM 74.8-75.4 (LWRP14): November 17,2022 
- MRM 74.8-75.4 (LWRP14): October 07, 2022 
- MRM 74.9-75.7 (LWRP14): September 07,2022 
- MRM 79.7-80.6 (LWRP14): August 28, 2023 
- MRM 79.9-80.5 (LWRP14): June 27, 2023 
- MRM 80.0-80.4 (LWRP14): November 12, 2022 
- MRM 87.3-88.4 (LWRP14): January 19, 2023 
- MRM 90.3-91.0 (LWRP14): September 28, 2022 
- MRM 90.3-91.3 (LWRP14): January 19, 2023 
- MRM 93.8-95.5 (LWRP14): October 01, 2022 
- MRM 95.7-97.2 (LWRP14): August 03, 2023 
- MRM 96.0-97.2 (LWRP14): June 28, 2023 
- MRM 97.3-97.8 (LWRP14): September 28, 2022 
- MRM 97.3-99.0 (LWRP14): October 01, 2022 
- MRM 98.0-99.1 (LWRP14): August 03, 2023 
- MRM 98.2-99.1 (LWRP14): June 28, 2023 
- MRM 100.0-100.9 (LWRP14): August 03, 2023 
- MRM 100.2-101.4 (LWRP14): June 28, 2023 
- MRM 100.5-103.5 (LWRP14): September 30, 2022 
- MRM 101.5-103.5 (LWRP14): December 15, 2022 
- MRM 101.5-103.5 (LWRP14): November 23, 2022 
- MRM 101.5-103.9 (LWRP14): May 31, 2023 
- MRM 101.7-103.4 (LWRP14): August 03, 2023 
- MRM 101.7-103.5 (LWRP14): July 06, 2023 
- MRM 102.2-103.2 (LWRP14): August 04, 2022 
- MRM 102.5-103.2 (LWRP14): August 30, 2022 
- MRM 106.8-109.0 (LWRP14): June 28, 2023 
- MRM 106.8-109.0 (LWRP14): September 30,2022 
- MRM 110.0-110.8 (LWRP14): November 22, 2022 
- MRM 110.0-111.0 (LWRP14): June 29, 2023 
- MRM 110.0-111.0 (LWRP14): January 03, 2023 
- MRM 110.0-111.0 (LWRP14): October 11, 2022 
- MRM 110.2-111.0 (LWRP14): November 23, 2022 
- MRM 112.6-113.5 (LWRP14): October 11, 2022 
- MRM 112.7-113.4 (LWRP14): June 29, 2023 
- MRM 113.0-113.5 (LWRP14): January 03, 2023 
- MRM 113.0-113.6 (LWRP14): November 23, 2022 
- MRM 114.9-115.9 (LWRP14): June 29, 2023 
- MRM 115.0-115.7 (LWRP14): September 19, 2022 
- MRM 115.0-115.7 (LWRP14): August 04, 2022 
- MRM 116.5-116.7 (LWRP14): June 29, 2023 
- MRM 122.0-122.8 (LWRP14): October 07, 2022 
- MRM 122.0-122.9 (LWRP14): June 22, 2023 
- MRM 122.1-122.7 (LWRP14): August 08, 2022 
- MRM 124.9-126.3 (LWRP14): July 20, 2023 
- MRM 125.0-126.0 (LWRP14): October 15, 2022 
- MRM 125.0-126.0 (LWRP14): October 03, 2022 
- MRM 125.0-126.2 (LWRP14): June 22, 2023 
- MRM 125.0-126.2 (LWRP14): December 08, 2022 
- MRM 125.2-128.9 (LWRP14): September 08, 2022 
- MRM 128.0-129.0 (LWRP14): September 26, 2022 
- MRM 128.9-130.0 (LWRP14): September 08, 2022 
- MRM 129.0-130.0 (LWRP14): December 08, 2022 
- MRM 129.0-130.0 (LWRP14): October 03, 2022 
- MRM 129.4-130.3 (LWRP14): June 22, 2023 
- MRM 129.5-130.0 (LWRP14): November 25, 2022 
- MRM 131.4-132.5 (LWRP14): September 26, 2022 
- MRM 131.5-132.4 (LWRP14): September 01, 2022 
- MRM 136.3-137.6 (LWRP14): December 08, 2022 
- MRM 136.4-137.3 (LWRP14): September 01, 2022 
- MRM 138.5-139.2 (LWRP14): September 01, 2022 
- MRM 145.0-146.0 (LWRP14): September 01, 2022 
- MRM 145.1-145.5 (LWRP14): December 02, 2022 
- MRM 145.1-146.2 (LWRP14): June 22, 2023 
- MRM 146.0-158.0 (LWRP14): November 30, 2022 
- MRM 147.0-150.0 (LWRP14): September 26, 2022 
- MRM 151.8-153.0 (LWRP14): September 27, 2022 
- MRM 151.8-153.0 (LWRP14): December 16, 2022 
- MRM 152.0-153.1 (LWRP14): June 26, 2023 
- MRM 153.8-155.0 (LWRP14): September 22, 2022 
- MRM 153.8-155.0 (LWRP14): September 28, 2022  
- MRM 156.0-156.5 (LWRP14): September 22, 2022
- MRM 156.0-156.8 (LWRP14): June 27, 2023 
- MRM 158.5-159.1 (LWRP14): September 12, 2022 
- MRM 158.5-159.3 (LWRP14): June 26, 2023 
- MRM 158.2-159.5 (LWRP14): December 01, 2022 
- MRM 158.4-159.3 (LWRP14): August 02,2023 
- MRM 159.5-160.7 (LWRP14): September 20, 2022 
- MRM 160.0-160.7 (LWRP14): August 17, 2022 
- MRM 160.2-161.4 (LWRP14): August 02,2023 
- MRM 160.2-161.4 (LWRP14): June 26, 2023 
- MRM 160.2-161.5 (LWRP14): August 25, 2023 
- MRM 165.5-168.0 (LWRP14): July 26, 2023 
- MRM 165.8-167.2 (LWRP14): July 10, 2023 
- MRM 165.8-169.8 (LWRP14): November 28, 2022 
- MRM 166.1-167.1 (LWRP14): August 05, 2022 
- MRM 166.2-168.8 (LWRP14): January 04, 2023 
- MRM 166.3-167.1 (LWRP14): September 26, 2022 
- MRM 167.5-169.2 (LWRP14): September 27, 2022 
- MRM 167.6-170.1 (LWRP14): June 27, 2023 
- MRM 167.8-168.5 (LWRP14): October 21, 2022 
- MRM 167.9-168.9 (LWRP14): July 24, 2023 
- MRM 169.0-172.0 (LWRP14): October 05, 2022 
- MRM 170.2-172.0 (LWRP14): December 05, 2022
- MRM 170.4-172.0 (LWRP14): September 01, 2023 NEW
- MRM 170.4-172.2 (LWRP14): July 05, 2023 
- MRM 170.5-172.0 (LWRP14): January 13, 2023 
- MRM 170.5-172.0 (LWRP14): February 10, 2023 
- MRM 170.5-172.0 (LWRP14): May 31, 2023 
- MRM 170.5-172.0 (LWRP14): June 20, 2023 
- MRM 170.8-171.8 (LWRP14): December 16, 2022 
- MRM 172.3-173.6 (LWRP14): June 20, 2023 
- MRM 172.7-173.9 (LWRP14): July 24, 2023 
- MRM 172.8-173.5 (LWRP14): January 13, 2023 
- MRM 172.8-173.2 (LWRP14): December 11, 2022 
- MRM 172.8-173.2 (LWRP14): October 05, 2022 
- MRM 172.8-173.5 (LWRP14): October 24, 2022 
- MRM 172.8-173.6 (LWRP14): June 01, 2023 
- MRM 172.8-173.5 (LWRP14): February 06, 2023 
- MRM 174.4-175.4 (LWRP14): July 10, 2023 
- MRM 174.5-175.1 (LWRP14): September 12, 2022 
- MRM 174.5-176.0 (LWRP14): November 22, 2022 
- MRM 174.6-175.0 (LWRP14): October 05, 2022 
- MRM 174.6-176.0 (LWRP14): December 16, 2022 
- MRM 176.4-177.2 (LWRP14): September 22, 2022 
- MRM 176.5-177.1 (LWRP14): January 13, 2023 
- MRM 180.8-182.1 (LWRP14): January 26, 2023 
- MRM 180.8-182.1 (LWRP14): November 22, 2022 
- MRM 180.9-182.9 (LWRP14): July 10, 2023 
- MRM 182.3-183.2 (LWRP14): August 29, 2022 
- MRM 183.8-184.1 (LWRP14): July 06, 2023 
- MRM 183.5-185.5 (LWRP14): September 20, 2022 
- MRM 183.8-185.1 (LWRP14): July 17, 2023 
- MRM 183.8-185.5 (LWRP14): November 22, 2022 
- MRM 193.3-194.2 (LWRP14): November 29, 2022 
- MRM 193.4-194.3 (LWRP14): August 08, 2023 
- MRM 193.5-194.2 (LWRP14): August 29, 2022 
- MRM 193.7-194.3 (LWRP14): June 29, 2023 
- MRM 195.4-196.3 (LWRP14): June 29, 2023 
- MRM 200.1-200.7 (LWRP14): November 04, 2022 
- MRM 200.2-200.7 (LWRP14): August 09, 2023 
- MRM 200.3-200.7 (LWRP14): July 06, 2023 
- MRM 200.3-200.7 (LWRP14): June 29, 2023 
 Melvin Price Pool, MRM 201-241
- MRM 202.9-204.3 (MP): April 13, 2023 
- MRM 207.0-208.1 (MP): June 19, 2023 
- MRM 207.2-209.4 (MP): April 13, 2023 
- MRM 217.3-218.6 (MP): June 16, 2023 
- MRM 220.4-223.1 (MP): September 01, 2023 NEW
- MRM 220.4-223.1 (MP): June 19, 2023 
- MRM 223.4-224.8 (MP): June 19, 2023 
- MRM 233.9-235.1 (MP): June 16, 2023 
- MRM 240.0-241.3 (MP): June 20, 2023 
- MRM 240.8-241.5 (MP): August 25, 2022 
- MRM 240.9-241.3 (MP): July 17, 2023 
- MRM 240.9-241.3 (MP): July 03, 2023 
- MRM 240.9-241.5 (MP): November 14, 2022 
- MRM 240.9-241.5 (MP): October 12,2022 
 Pool 25, MRM 241-273
- MRM 247.2-248.4 (MP): June 20, 2023 
- MRM 248.5-249.3 (MP): May 30, 2023 
- MRM 248.5-249.5 (MP): May 01, 2023 
- MRM 248.7-249.5 (MP): March 22, 2023 
- MRM 248.7-249.5 (MP): August 26, 2022 
- MRM 248.9-249.5 (MP): June 20, 2023 
- MRM 250.2-251.1 (MP): June 21, 2023 
- MRM 250.5-253.1 (MP): July 05, 2023 
- MRM 253.1-253.8 (MP): June 21, 2023 
- MRM 254.2-255.3 (MP): August 23,2023 NEW
- MRM 254.4-256.3 (MP): August 04, 2023 NEW
- MRM 254.4-256.3 (MP): March 22, 2023 
- MRM 254.4-256.3 (MP): August 25, 2022 
- MRM 254.8-255.5 (MP): June 14, 2023 
- MRM 255.5-257.2 (MP): June 21, 2023 
- MRM 262.8-263.5 (MP): June 22, 2023 
- MRM 264.0-264.6 (MP): June 22, 2023 
- MRM 265.4-267.7 (MP): August 01, 2023 NEW
- MRM 265.4-267.7 (MP): June 22, 2023 
- MRM 265.7-267.4 (MP): August 30, 2022 
- MRM 268.7-270.6 (MP): June 26, 2023 
- MRM 269.3-270.4 (MP): August 23, 2023 NEW
- MRM 272.2-273.2 (MP): August 24, 2023 NEW
- MRM 272.3-272.8 (MP): June 26, 2023 
- MRM 272.6-273.0 (MP): August 31, 2022 
 
 Pool 24, MRM 273-301
- MRM 273.5-275.0 (MP): August 31, 2022 
- MRM 273.6-274.9 (MP): June 27, 2023 
- MRM 273.7-275.1 (MP): August 04, 2023 NEW
- MRM 288.9-289.9 (MP): April 28, 2023 
- MRM 289.0-289.6 (MP): October 21, 2022 
- MRM 289.0-289.6 (MP): October 06, 2022 
- MRM 289.0-289.6 (MP): August 31, 2022 
- MRM 289.0-289.7 (MP): June 26, 2023 
- MRM 289.0-290.0 (MP): August 02, 2023 NEW
- MRM 289.0-290.0 (MP): January 05, 2023 
- MRM 289.0-290.1 (MP): March 23, 2023 
 Illinois River: Miles 00-80
- IRM 35.2-37.2 (MP): June 20, 2023 
- IRM 37.9-39.2 (MP): June 20, 2023 
- IRM 40.0-41.7 (MP): June 20, 2023 
- IRM 61.0-63.0 (MP): September 05, 2023 NEW
- IRM 61.4-63.6 (MP): June 21, 2023 
- IRM 65.4-67.0 (MP): November 09, 2022        
- IRM 65.5-67.0 (MP): August 20, 2022 
- IRM 73.0-74.0 (MP): June 21, 2023 
- IRM 73.0-79.0 (MP): September 05, 2023 NEW
- IRM 74.0-78.9 (MP): October 11, 2022 
- IRM 74.0-78.9 (MP): August 02, 2022 
- IRM 74.0-80.0 (MP): June 01, 2023 
- IRM 74.5-79.0 (MP): August 22. 2022 
 Kaskaskia River: Miles 00-36
- KRM 0.0-0.8 (LWRP14): June 18, 2023 NEW
- KRM 0.0-0.8 (LWRP14): October 01, 2022