Navigation Links

Redirecting...

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 0.8 - 1.8 (LWRP14): September 21, 2023
- MRM 1.0 - 1.6 (LWRP14): June 22, 2023 
- MRM 6.6 - 7.5 (LWRP14): September 21, 2023
- MRM 10.8 - 11.9 (LWRP14): September 22, 2023
- MRM 14.7-16.4 (LWRP14): July 25, 2023 
- MRM 14.9 - 16.2 (LWRP14): September 23, 2023
- MRM 15.0-16.0 (LWRP14): October 04, 2022 
- MRM 15.0-16.3 (LWRP14): June 22, 2023 
- MRM 15.3-15.7 (LWRP14): August 09, 2023 
- MRM 17.9-19.0 (LWRP14): September 22, 2023
- MRM 23.7-24.7 (LWRP14): January 09, 2023 
- MRM 23.7-25.1 (LWRP14): August 23, 2023 
- MRM 23.9-25.0 (LWRP14): June 22, 2023 
- MRM 27.1-29.0 (LWRP14): August 23, 2023 
- MRM 27.3-29.0 (LWRP14): June 22, 2023 
- MRM 36.8-38.0 (LWRP14): October 20, 2023
- MRM 36.9-40.1 (LWRP14): June 23, 2023 
- MRM 37.0-40.2 (LWRP14): November 06, 2023
- MRM 37.0-40.2 (LWRP14): November 07, 2023
- MRM 37.4-43.0 (LWRP14): October 06, 2023
- MRM 39.6-40.2 (LWRP14): June 23, 2023 
- MRM 40.5-43.7 (LWRP14): November 15, 2023
- MRM 40.5-43.7 (LWRP14): November 20, 2023
- MRM 41.0-42.7 (LWRP14): June 26, 2023 
- MRM 43.7-44.9 (LWRP14): October 05, 2023
- MRM 43.7-45.1 (LWRP14): November 30, 2023
- MRM 45.3-47.6 (LWRP14): October 05, 2023
- MRM 47.9-48.1 SEMO (LWRP14): October 12, 2023
- MRM 47.9-48.1 SEMO (LWRP14): November 20, 2023
- MRM 48.0-48.1 SEMO (LWRP14): June 23, 2023
- MRM 55.4-56.8 (LWRP14): November 15, 2023
- MRM 55.9-56.5 (LWRP14): June 26, 2023 
- MRM 55.9-56.8 (LWRP14): December 06, 2023 NEW
- MRM 55.9-56.8 (LWRP14): December 06, 2023 NEW
- MRM 57.9-59.0 (LWRP14): November 15, 2023
- MRM 58.0-58.8 (LWRP14): September 13, 2023
- MRM 58.0-59.1 (LWRP14): June 26, 2023 
- MRM 61.0-63.0 (LWRP14): July 02, 2023 
- MRM 63.7-64.3 (LWRP14): July 02, 2023 
- MRM 68.7-69.9 (LWRP14): September 13, 2023
- MRM 68.7-70.0 (LWRP14): November 15, 2023
- 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 71.9-73.4 (LWRP14): November 15, 2023
- MRM 73.1-73.5 (LWRP14): June 27, 2023 
- MRM 79.6-80.7 (LWRP14): December 21, 2023 NEW
- MRM 79.6-80.7 (LWRP14): December 21, 2023 NEW
- MRM 79.7-80.6 (LWRP14): August 28, 2023 
- MRM 79.7-80.7 (LWRP14): November 21, 2023
- MRM 79.9-80.5 (LWRP14): June 27, 2023 
- MRM 90.3-91.3 (LWRP14): January 19, 2023 
- MRM 94.0-96.1 (LWRP14): September 26, 2023
- MRM 94.9-96.1 (LWRP14): February 29, 2024 NEW
- MRM 95.7-97.2 (LWRP14): August 03, 2023 
- MRM 96.0-97.2 (LWRP14): June 28, 2023 
- MRM 96.0-99.1 (LWRP14): November 21, 2023
- 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 100.0-103.4 (LWRP14): October 30, 2023
- MRM 100.0-103.4 (LWRP14): October 30, 2023
- MRM 100.0-103.4 (LWRP14): October 31, 2023
- MRM 100.2-101.4 (LWRP14): June 28, 2023 
- MRM 101.7-103.4 (LWRP14): August 03, 2023 
- MRM 101.7-103.5 (LWRP14): July 06, 2023 
- MRM 106.8-109.0 (LWRP14): June 28, 2023 
- MRM 107.0-109.0 (LWRP14): December 05, 2023 NEW
- MRM 109.9-111.1 (LWRP14): November 14, 2023
- MRM 110.0-111.0 (LWRP14): June 29, 2023 
- MRM 112.4-113.6 (LWRP14): November 14, 2023
- MRM 112.7-113.4 (LWRP14): June 29, 2023 
- MRM 114.9-115.9 (LWRP14): June 29, 2023 
- MRM 116.2-117.1 (LWRP14): December 05, 2023 NEW
- MRM 116.5-116.7 (LWRP14): June 29, 2023 
- MRM 120.9-122.5 (LWRP14): December 04, 2023 NEW
- MRM 122.0-122.9 (LWRP14): June 22, 2023 
- MRM 124.9-126.3 (LWRP14): July 20, 2023 
- MRM 125.0-126.2 (LWRP14): June 22, 2023 
- MRM 129.0-130.1 (LWRP14): November 14, 2023
- MRM 129.4-130.3 (LWRP14): June 22, 2023 
- MRM 133.0-134.0 (LWRP14): September 26, 2023
- MRM 133.0-134.2 (LWRP14): December 04, 2023 NEW
- MRM 145.0-146.0 (LWRP14): January 25, 2024 NEW
- MRM 145.0-146.1 (LWRP14): December 01, 2023 NEW
- MRM 145.1-146.2 (LWRP14): June 22, 2023 
- MRM 152.0-153.0 (LWRP14): December 19, 2023 NEW
- MRM 152.0-153.0 (LWRP14): December 19, 2023 NEW
- MRM 152.0-153.1 (LWRP14): June 26, 2023 
- MRM 152.0-153.2 (LWRP14): December 01, 2023 NEW
- MRM 153.7-155.6 (LWRP14): October 26, 2023
- MRM 155.6-157.1 (LWRP14): December 01, 2023 NEW
- MRM 156.0-156.8 (LWRP14): June 27, 2023 
- MRM 158.5-159.3 (LWRP14): June 26, 2023 
- MRM 158.4-159.3 (LWRP14): August 02,2023 
- MRM 158.5-159.3 (LWRP14): December 19, 2023 NEW
- MRM 158.5-159.3 (LWRP14): December 19, 2023 NEW
- MRM 158.6-159.1 (LWRP14): October 26, 2023
- MRM 158.6-158.9 (LWRP14): October 11, 2023
- MRM 158.8-159.7 (LWRP14): January 02, 2024 NEW
- MRM 158.8-159.7 (LWRP14): January 02, 2024 NEW
- MRM 160.0-161.2 (LWRP14): October 26, 2023
- MRM 160.0-161.5 (LWRP14): December 14, 2023 NEW
- MRM 160.0-161.5 (LWRP14): December 14, 2023 NEW
- 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 165.6-167.0 (LWRP14): February 05, 2024 NEW
- MRM 165.6-167.4 (LWRP14): December 14, 2023 NEW
- MRM 165.6-167.4 (LWRP14): December 14, 2023 NEW
- MRM 165.7-168.5 (LWRP14): October 16, 2023
- MRM 165.8-167.2 (LWRP14): July 10, 2023 
- MRM 166.2-168.8 (LWRP14): January 04, 2023 
- MRM 167.3-170.0 (LWRP14): November 30, 2023
- MRM 167.3-170.0 (LWRP14): November 30, 2023
- MRM 167.4-170.0 (LWRP14): February 05, 2024 NEW
- MRM 167.6-170.1 (LWRP14): June 27, 2023 
- MRM 167.9-168.9 (LWRP14): July 24, 2023 
- MRM 168.6-172.0 (LWRP14): October 17, 2023
- MRM 170.4-172.0 (LWRP14): September 01, 2023
- MRM 170.4-172.2 (LWRP14): July 05, 2023 
- MRM 170.5-172.0 (LWRP14): June 20, 2023 
- MRM 170.9-172.0 (LWRP14): December 22, 2023 NEW
- MRM 170.9-172.0 (LWRP14): December 22, 2023 NEW
- MRM 171.3-172.1 (LWRP14): December 07, 2023 NEW
- MRM 171.3-172.1 (LWRP14): December 07, 2023 NEW
- MRM 172.3-173.6 (LWRP14): June 20, 2023 
- MRM 172.7-173.6 (LWRP14): October 16, 2023
- MRM 172.7-173.9 (LWRP14): July 24, 2023 
- MRM 172.8-173.6 (LWRP14): June 01, 2023 
- MRM 172.9-173.4 (LWRP14): November 30, 2023
- MRM 172.9-173.4 (LWRP14): November 30, 2023
- MRM 172.9-173.5 (LWRP14): December 20, 2023 NEW
- MRM 172.9-173.5 (LWRP14): February 05, 2024 NEW
- MRM 174.4-175.4 (LWRP14): July 10, 2023 
- MRM 176.4-177.4 (LWRP14): November 21, 2023
- MRM 180.5-183.3 (LWRP14): October 11, 2023
- MRM 180.7-181.6 (LWRP14): December 20, 2023 NEW
- MRM 180.9-182.9 (LWRP14): July 10, 2023 
- MRM 181.0-185.0 (LWRP14): March 18, 2024 NEW
- MRM 181.0-185.0 (LWRP14): March 19, 2024 NEW
- MRM 181.0-185.0 (LWRP14): March 28, 2024 NEW
- MRM 182.3-183.8 (LWRP14): April 12, 2024 NEW
- MRM 182.4-183.2 (LWRP14): December 20, 2023 NEW
- MRM 183.7-185.2 (LWRP14): November 01, 2023
- MRM 183.8-184.1 (LWRP14): July 06, 2023 
- MRM 183.7-184.9 (LWRP14): September 28, 2023
- MRM 183.8-184.4 (LWRP14): December 20, 2023 NEW
- MRM 183.8-184.4 (LWRP14): December 20, 2023 NEW
- MRM 183.8-185.1 (LWRP14): July 17, 2023 
- MRM 193.4-194.3 (LWRP14): August 08, 2023 
- MRM 193.7-194.3 (LWRP14): September 28, 2023
- MRM 193.7-194.3 (LWRP14): June 29, 2023 
- MRM 195.0-196.2 (LWRP14): October 19, 2023
- MRM 195.4-196.3 (LWRP14): June 29, 2023 
- MRM 200.2-200.6 (LWRP14): November 01, 2023
- 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 207.0-208.1 (MP): June 19, 2023 
- MRM 207.2-208.2 (MP): June 12, 2024 NEW
- MRM 217.0-218.5 (MP): June 12, 2024 NEW
- MRM 217.0-219.5 (MP): October 2, 2023
- MRM 217.3-218.6 (MP): June 16, 2023 
- MRM 217.5-218.3 (MP): November 01, 2023
- MRM 220.4-222.0 (MP): November 02, 2023
- MRM 220.4-223.1 (MP): September 01, 2023
- MRM 220.4-223.1 (MP): June 19, 2023 
- MRM 220.4-222.1 (MP): October 02, 2023
- MRM 222.9-224.8 (MP): October 26, 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 240.9-241.3 (MP): July 17, 2023 
- MRM 240.9-241.3 (MP): July 03, 2023 
- MRM 240.9-241.3 (MP): October 03, 2023
- MRM 240.9-241.3 (MP): April 08, 2024 NEW
- MRM 240.9-241.3 (MP): June 12, 2024 NEW
 Pool 25, MRM 241-273
- MRM 241.5-243.6 (MP): April 09, 2024 NEW
- MRM 241.6-243.2 (MP): June 12, 2024 NEW
- MRM 247.2-248.3 (MP): June 13, 2024 NEW
- MRM 247.2-248.4 (MP): June 20, 2023 
- MRM 248.9-249.5 (MP): June 20, 2023 
- MRM 248.7-249.5 (MP): October 27, 2023
- MRM 250.2-251.1 (MP): June 21, 2023 
- MRM 250.5-253.1 (MP): July 05, 2023 
- MRM 252.0-253.8 (MP): June 13, 2024 NEW
- MRM 252.1-253.5 (MP): November 13, 2023
- MRM 252.1-253.8 (MP): October 27, 2023
- MRM 253.1-253.8 (MP): June 21, 2023 
- MRM 254.2-255.3 (MP): August 23,2023
- MRM 254.2-255.5 (MP): October 04, 2023
- MRM 254.4-255.3 (MP): November 13, 2023
- MRM 254.4-256.3 (MP): August 04, 2023
- MRM 254.5-257.1 (MP): April 09, 2024 NEW
- MRM 254.8-255.5 (MP): June 14, 2023 
- MRM 255.5-257.2 (MP): June 21, 2023 
- MRM 255.5-257.3 (MP): October 30, 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
- MRM 265.4-267.7 (MP): June 22, 2023 
- MRM 265.6-266.6 (MP): June 13, 2024 NEW
- MRM 268.7-270.6 (MP): June 26, 2023 
- MRM 269.3-270.4 (MP): August 23, 2023
- MRM 272.2-273.2 (MP): August 24, 2023
- MRM 272.3-272.8 (MP): June 26, 2023 
 
 Pool 24, MRM 273-301
- MRM 273.2-300.0 (MP): May 31, 2024 NEW
- MRM 273.6-274.9 (MP): June 27, 2023 
- MRM 273.7-275.1 (MP): August 04, 2023
- MRM 273.9-274.9 (MP): October 31, 2023
- MRM 273.9-275.2 (MP): April 10, 2024 NEW
- MRM 274.4-274.9 (MP): December 19, 2023 NEW
- MRM 288.9-289.7 (MP): October 30, 2023
- MRM 288.9-290.1 (MP): April 10, 2024 NEW
- MRM 289.0-289.7 (MP): June 26, 2023 
- MRM 289.0-290.0 (MP): August 02, 2023
- MRM 289.0-290.0 (MP): February 13, 2024 NEW
 Illinois River: Miles 00-80
- IRM 35.1-37.3 (MP): September 28, 2023
- IRM 35.2-36.7 (MP): October 23, 2023
- IRM 35.2-37.2 (MP): June 20, 2023 
- IRM 37.7-39.2 (MP): September 28, 2023
- IRM 37.9-39.2 (MP): June 20, 2023 
- IRM 38.4-38.9 (MP): October 23, 2023
- IRM 39.9-40.4 (MP): October 23, 2023
- IRM 40.0-41.7 (MP): September 28, 2023
- IRM 40.0-41.7 (MP): June 20, 2023 
- IRM 40.0-41.7 (MP): October 23, 2023
- IRM 61.0-63.0 (MP): September 05, 2023 
- IRM 61.4-63.6 (MP): June 21, 2023 
- IRM 62.0-63.0 (MP): September 27, 2023 
- IRM 62.0-63.7 (MP): December 04, 2023 NEW
- IRM 73.0-73.4 (MP): October 23, 2023
- IRM 73.0-74.0 (MP): June 21, 2023 
- IRM 73.0-79.0 (MP): September 05, 2023
- IRM 74.0-80.0 (MP): June 01, 2023 
- IRM 74.1-77.1 (MP): October 23, 2023
- IRM 74.4-75.1 (MP): September 27, 2023
- IRM 77.0-79.0 (MP): September 28, 2023
 Kaskaskia River: Miles 00-36
- KRM 0.0-0.8 (LWRP14): June 18, 2023
- KRM 0.0-0.8 (LWRP14): November 27, 2023
- KRM 16.5-18.7 (MP): December 12, 2023 NEW
- KRM 16.5-18.7 (MP): December 12, 2023 NEW
- KRM 16.5-18.7 (MP): December 12, 2023 NEW