B3MRLD25202402-PLAN_SET_AMND-2026-04-08-Amendment 0004 Plans.pdf
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- Attached to
- LOCK FOUNDATION AND SITE PREPARATION FOR LOCK and DAM 25 NAVIGATION ECOSYSTEM SUSTAINABILITY PROGRAM (NESP)
- Solicitation number
- W912P926RA001
About this file
This is a design drawing index and set of construction documents for the U.S. Army Corps of Engineers St. Louis District project titled "Upper Mississippi River Navigation Ecosystem Sustainability Project (NESP) - Lock and Dam No. 25 Lock Foundation and Site Preparation."
The document package consists of comprehensive construction drawings with a solicitation number W912P9-XX-X-XXXX and contract number W912P9-26-R-A001, issued in January 2026. The project involves lock foundation and site preparation work at Lock and Dam No. 25 on the Upper Mississippi River. Key work elements include riprap excavation, separator wall installation, foundation preparation, dredging operations, demolition activities, and site grading across multiple phases. The contractor work limits encompass river dredge areas for lock foundation preparation, land-based fill locations, staging areas, a marine access site with high water ferry landing, and environmental sensitive areas with restricted work during the lake sturgeon spawning season (April 1 through May 15). The drawings include geotechnical data (boring logs, soil analysis), survey information (hydrographic surveys, existing conditions), structural details for sheet pile separator walls and deflector panels, and detailed profiles and cross-sections for excavation and foundation work. Access to river work limits must follow navigation and Coast Guard regulations. Two staging areas are identified, with Staging Area 1 occupied until approximately October 2026 and Area 2 available at contract award. The marine access area has temporary easement restrictions during high water events when river levels exceed the tailwater gage of 30.5.
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SHEET ID DRAWING TITLE SHEET NO SHEET ID DRAWING TITLE SHEET NO
CG304 CROSS SECTIONS - RIPRAP EXCAVATION AND SEPARATOR WALL 84
CG303 CROSS SECTIONS - RIPRAP EXCAVATION AND SEPARATOR WALL 83
CG302 CROSS SECTIONS - RIPRAP EXCAVATION AND SEPARATOR WALL 82
CG301 CROSS SECTIONS - RIPRAP EXCAVATION AND SEPARATOR WALL 81
CG208 PROFILE - SANITARY OUTFALL 80
CG207 PROFILE - FOUNDATION PREPARATION LOCK CENTERLINE 79
CG206 PROFILE - FOUNDATION PREPARATION LOCK CENTERLINE 78
CG205 PROFILE - FOUNDATION PREPARATION LOCK CENTERLINE 77
CG204 PROFILE - SEPARATOR WALL 76
CG203 PROFILE - SEPARATOR WALL 75
CG202 PROFILE - RIPRAP EXCAVATION 74
CG201 PROFILE - RIPRAP EXCAVATION 73
CG109 GRADING PLAN - FOUNDATION PREPARATION 72
CG108 GRADING PLAN - FOUNDATION PREPARATION 71
CG107 GRADING PLAN - FOUNDATION PREPARATION 70
CG106 GRADING PLAN - SEPARATOR WALL RIPRAP EXCAVATION PHASE 2 69
CG105 GRADING PLAN - SEPARATOR WALL RIPRAP EXCAVATION PHASE 2 68
CG104 GRADING PLAN - RIPRAP EXCAVATION PHASE 1 67
CG103 GRADING PLAN - RIPRAP EXCAVATION PHASE 1 66
CG102 GRADING PLAN - LAND SITE 65
CG101 GRADING PLAN - LAND SITE 64
CG100 OVERALL GRADING PLAN 63
CS501 SITE DETAILS 62
CS109 SITE PLAN - FOUNDATION PREPARATION 61
CS108 SITE PLAN - FOUNDATION PREPARATION 60
CS107 SITE PLAN - FOUNDATION PREPARATION 59
CS106 SITE PLAN - SEPARATOR WALL AND RIPRAP EXCAVATION PHASE 2 58
CS105 SITE PLAN - SEPARATOR WALL AND RIPRAP EXCAVATION PHASE 2 57
CS104 SITE PLAN - RIPRAP EXCAVATION PHASE 1 56
CS103 SITE PLAN - RIPRAP EXCAVATION PHASE 1 55
CS102 SITE PLAN - LAND SITE 54
CS101 SITE PLAN - LAND SITE 53
CS100 OVERALL SITE PLAN 52
CD501 DEMOLITION PHOTOGRAPHS 51
CD102 DEMOLITION PLAN 50
CD101 DEMOLITION PLAN 49
CD100 OVERALL DEMOLITION PLAN 48
CIVIL
BI601 EXISTING INSTRUMENTATION TABLE 47
BI104 EXISTING INSTRUMENTATION PLAN SHEET 3 OF 3 46
BI103 EXISTING INSTRUMENTATION PLAN SHEET 2 OF 3 45
BI102 EXISTING INSTRUMENTATION PLAN SHEET 1 OF 3 44
BI101 CONTROL MONUMENTS PLAN 43
BB208 BORING LOGS 42
BB207 BORING LOGS 41
BB206 BORING LOGS 40
BB205 BORING LOGS 39
BB204 BORING LOGS 38
BB203 BORING LOGS 37
BB202 BORING LOGS 36
BB201 BORING LOGS 35
BB104 BORING LOCATION PLAN SHEET 3 OF 3 34
BB103 BORING LOCATION PLAN SHEET 2 OF 3 33
BB102 BORING LOCATION PLAN SHEET 1 OF 3 32
BB101 OVERALL BORING LOCATION PLAN 31
BB001 SOIL AND ROCK LEGEND 30
GEOTECHNICAL
VH606 ELEVATION DURATION PLOTS - MONTHLY AND QUARTERLY 29
VH605 ELEVATION - FLOW CURVES 28
VH604 ELEVATION DURATION AND FREQUENCY CURVES (1952-2022) 27
VH603 HYDROGRAPHS 2013 TO 2023 26
VH602 HYDROGRAPHS 1998 TO 2013 25
VH601 HYDROGRAPHS 1983 TO 1998 24
VS108 EXISTING CONDITIONS - HYDROSURVEY 2024 23
VS107 EXISTING CONDITIONS - HYDROSURVEY 2024 22
VS106 EXISTING CONDITIONS - HYDROSURVEY 2024 21
VS105 EXISTING CONDITIONS - AVERAGE SURVEYED RIVER BOTTOM 20
VS104 EXISTING CONDITIONS - AVERAGE SURVEYED RIVER BOTTOM 19
VS103 EXISTING CONDITIONS - AVERAGE SURVEYED RIVER BOTTOM 18
VS102 EXISTING CONDITIONS - LAND SITE 17
VS101 EXISTING CONDITIONS - LAND SITE 16
VS100 OVERALL EXISTING CONDITIONS 15
VF101 CONTROL POINT LOCATION PLAN 14
VA101 AERIAL PHOTOGRAPH 13
SURVEY
GC105 CONTRACTOR WORK LIMITS 12
GC104 CONTRACTOR WORK LIMITS 11
GC103 CONTRACTOR WORK LIMITS 10
GC102 CONTRACTOR WORK LIMITS 9
GC101 CONTRACTOR WORK LIMITS 8
GC100 OVERALL CONTRACTOR WORK LIMITS 7
GC003 GENERAL INFORMATION 6
GC002 VICINITY MAP AND LEGENDS 5
GC001 LOCATION AND VICINITY MAPS 4
GI003 GENERAL ABBREVIATIONS 3
GI002 INDEX OF DRAWINGS 2
GI001 COVER SHEET 1
GENERAL
SURFACE SAMPLE LOCATION MAP AND GRADATION DATA
HISTORICAL INSTRUMENTATION DATA
APPENDIX B - INSTRUMENTATION THRESHOLDS
APPENDIX B - INSTRUMENTATION LOCATIONS
APPENDIX A - INSTRUMENTATION INVENTORY
2022 - LOCK AND DAM 25 DOWNSTREAM GUIDE WALL SILT REMOVAL
2012 - LOCK AND DAM 25 DOWNSTREAM MAIN LOCK SCOUR REPAIR PHASE 2
2012 - LOCK AND DAM 25 DOWNSTREAM MAIN LOCK SCOUR REPAIR PHASE 1
1935 - LOCK AND DAM 25 LOCK ORIGINAL AS-BUILTS
REFERENCE DRAWINGS
SB504 PIPE PILES DETAILS 121
SB503 SHEET PILE DEFLECTOR PANEL DETAILS 120
SB502 SHEET PILE DEFLECTOR PANEL DETAILS 119
SB501 SHEET PILE DEFLECTOR PANEL DETAILS 118
SB301 SHEET PILE DEFLECTOR PANEL SECTIONS 117
SB203 SHEET PILE DEFLECTOR PANEL ELEVATIONS 116
SB202 SHEET PILE DEFLECTOR PANEL ELEVATIONS 115
SB201 SHEET PILE DEFLECTOR PANEL ELEVATION 114
SB102 SHEET PILE SEPARATOR WALL ENLARGED PLAN 113
SB101 SHEET PILE SEPARATOR WALL OVERALL PLAN 112
SB001 GENERAL STRUCTURAL NOTES 111
STRUCTURAL
CN104 DREDGING PLAN 110
CN103 DREDGING PLAN 109
CN102 DREDGING PLAN 108
CN101 DREDGING PLAN 107
CN100 OVERALL DREDGING PLAN 106
CG402 TYPICAL SECTIONS - SITE PREPARATION 105
CG401 TYPICAL SECTIONS - FOUNDATION PREPARATION 104
CG323 CROSS SECTIONS - FOUNDATION PREPARATION 103
CG322 CROSS SECTIONS - FOUNDATION PREPARATION 102
CG321 CROSS SECTIONS - FOUNDATION PREPARATION 101
CG320 CROSS SECTIONS - FOUNDATION PREPARATION 100
CG319 CROSS SECTIONS - FOUNDATION PREPARATION 99
CG318 CROSS SECTIONS - FOUNDATION PREPARATION 98
CG317 CROSS SECTIONS - FOUNDATION PREPARATION 97
CG316 CROSS SECTIONS - FOUNDATION PREPARATION 96
CG315 CROSS SECTIONS - FOUNDATION PREPARATION 95
CG314 CROSS SECTIONS - FOUNDATION PREPARATION 94
CG313 CROSS SECTIONS - FOUNDATION PREPARATION 93
CG312 CROSS SECTIONS - FOUNDATION PREPARATION 92
CG311 CROSS SECTIONS - FOUNDATION PREPARATION 91
CG310 CROSS SECTIONS - FOUNDATION PREPARATION 90
CG309 CROSS SECTIONS - FOUNDATION PREPARATION 89
CG308 CROSS SECTIONS - RIPRAP EXCAVATION AND SEPARATOR WALL 88
CG307 CROSS SECTIONS - RIPRAP EXCAVATION AND SEPARATOR WALL 87
CG306 CROSS SECTIONS - RIPRAP EXCAVATION AND SEPARATOR WALL 86
CG305 CROSS SECTIONS - RIPRAP EXCAVATION AND SEPARATOR WALL 85
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2 2 HIGH WATER FERRY LANDING
MARINE ACCESS SITE
STAGING AREA 1
STAGING AREA 2
SEE NOTE 7
LAKE STURGEON SPAWNING
LIMITED WORK LIMITS
A1
SCALE: 1"=800'
OVERALL CONTRACTOR WORK LIMITS
GC101
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LEGEND
CONTRACTOR WORK LIMT
SAILING LINE
600' LOCK NAVIGATION CHANNEL
ILLINOIS - MISSOURI STATE LINE
AND COORDINATION.
SEASON, APRIL 1 THRU MAY 15. SEE SECTION 00 80 00 ORDER
7. LIMITED WORK LIMITS DURING LAKE STURGEON SPAWNING
APPROVAL.
ACCOMMODATE IMPROVEMENTS FOR GOVERNMENT
CONTRACTOR MAY REQUEST ADDITIONAL WORK LIMITS TO
CONSTRUCTION WITHIN THE WATERS OF THE U.S.
WILL BE REQUIRED TO OBTAIN PERMITS FOR ANY
FOR CONTRACTOR MEANS AND METHODS. THE CONTRACTOR
6. THE MARINE ACCESS AREA MAY BE IMPROVED AS REQUIRED
LEVELS ABOVE TAILWATER GAGE 30.5
LANDING. HIGH WATER EVENTS ARE CONSIDERED RIVER
EVENTS PUBLIC ACCESS MUST BE AVAILABLE FOR FERRY
WITH THE FOLLOWING RESTRICTIONS: DURING HIGH WATER
THE MARINE ACCESS AREA HAS A TEMPORARY EASEMENT 5.
AREA 2 WILL BE AVAILABLE AT AWARD.
OCCUPIED BY OTHERS UNTIL ON OR ABOUT OCTOBER 2026.
TWO STAGING AREAS ARE IDENTIFIED. AREA 1 WILL BE 4.
DREDGING TO STAY WITHIN THE STATE OF MISSOURI LIMITS.3.
NAVIGATION AND COAST GUARD REGULATIONS.
ACCESS TO WORK LIMITS IN THE RIVER SHALL FOLLOW 2.
DATE OF AERIAL PHOTOGRAPH IS FEBRUARY 2024.1.
FOR LOCK FOUNDATION
DREDGE AREA - 2
FOR LOCK FOUNDATION
DREDGE AREA - 1
LAND-BASED FILL
DREDGE AREA FOR
SEE SHEET KEYNOTES
ENVIRONMENTAL SENSITIVE AREA
DREDGE WORK LIMT (DWL)
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PROFILE - SEPARATOR WALL
1+00 1+20 1+40 1+60 1+80 2+00 2+20 2+40 2+60 2+80 3+00 3+20 3+40 3+60 3+80 4+00 4+20 4+40 4+60 4+80 5+00 5+20 5+40 5+60 5+80 6+00 6+20
280 280
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EL. 433.6
TOP OF WALL
SEPARATOR WALL
SHEET PILE
BOTTOM OF WALL
EL 324.6
APPROXIMATE BEDROCK
EL 324.6
APPROXIMATE BEDROCK
ELEV. 434.6
AND PIPE PILE
TOP OF DEFLECTOR WALL
NOTE:
1. SEPARATOR WALL TIP ELEVATION WAS DETERMINED BASED ON EXCAVATED RIVER
BOTTOM AND MINIMUM SURVEYED RIVER BOTTOM.
2. THE CONTRACTOR SHALL VERIFY THE RIVER BOTTOM ELEVATION AS FULL EXCAVATION
PROGRESSES. IF LOCALIZED OVER-EXCAVATION IS REQUIRED TO REMOVE THE EXISTING
RIPRAP AND/OR BEDDING STONE AND THAT OVER-EXCAVATION EXTENDS BELOW THE
MINIMUM FOUNDATION (FND) ELEVATIONS AS SHOWN ON THE PROFILE, THE CONTRACTOR
SHALL BACKFILL WITH #57 AGGREGATE TO RE-ESTABLISH THE LISTED MINIMUM FOUNDATION
ELEVATIONS PRIOR TO INSTALLING SEPARATOR WALL. NO FORMAL COMPACTION OR DENSITY
TESTING IS REQUIRED FOR THIS BACKFILL. HOWEVER, THE CONTRACTOR IS ENCOURAGED TO
PLACE THE MATERIAL IN LIFTS AND MAKE REASONABLE EFFORTS TO DENSIFY THE FILL
USING AVAILABLE EQUIPMENT TO THE EXTENT POSSIBLE.
3. THE MINIMUM EMBEDMENT IS 20.0 FEET AND THE SHEET PILE TIP ELEVATION
MUST BE EQUAL TO OR DEEPER THAN EL 370.0
0.00%GRADE =
0.00%GRADE =
0.00%GRADE =
0.00%GRADE =
0.00%GRADE =
0.00%GRADE =
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.0
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LANDSIDE OF SEPARATOR WALL
SAND FILL
EL 407
LANDSIDE OF SEPARATOR WALL
SAND FILL
399.00 BOTTOM EL
2+14.00 STA
405.50 TOP EL
2+14.00 STA
R5000
399.60 TOP EL
2+38.00 STA
R5000
405.50 TOP EL
1+46.00 STA
START R5000
391.00 BOTTOM EL
2+38.00 STA
START C-STONE INITIAL BACKFILL
END ARTICULATING MATTRESS
DAM END SILL
EXISTING
BASIN, GATE 1
DAM SILLING
FND ELEV 363.8
FND ELEV 355.9
FND ELEV 355.9FND ELEV 355.9
FND ELEV 362.0
FND ELEV 374.0
FND ELEV 381.1
FND ELEV 386.2
FND ELEV 392.2BOTTOM ELEV 399.0
MATTRESS, STA 1+46.00
START ARTICULATING
MINIMUM FOUNDATION ELEVATION
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W
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H A
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RIVER BOTTOM
AVERAGE SURVEYED
RIVER BOTTOM
MINIMUM SURVEYED
BOTTOM
RIPRAP EXCAVATION
BOTTOM
RIPRAP EXCAVATION
2 2
AP
R
AP
R
SCALE: 1"=20' HORZ. 1"=10' VERT.
PROFILE - SEPARATOR WALL
6+20 6+40 6+60 6+80 7+00 7+20 7+40 7+60 7+80 8+00 8+20 8+40 8+60 8+80 9+00 9+20 9+40 9+60 9+80 10+00 10+20 10+40 10+60 10+80 11+00
280 280
290 290
300 300
310 310
320 320
330 330
340 340
350 350
360 360
370 370
380 380
390 390
400 400
410 410
420 420
430 430
440 440
450 450
EL. 433.6
TOP OF WALL
11+20
0.00%GRADE =
BOTTOM OF WALL
0.00%GRADE =
0.00%GRADE =
E L
E V
.0
S T
A
.3
P
V I
E L
E V
.0
S T
A
.8
P V
I
E L
E V
.0
S T
A
.8
P V
I
NOTE:
1. SEPARATOR WALL TIP ELEVATION WAS DETERMINED BASED ON EXCAVATED RIVER
BOTTOM AND MINIMUM SURVEYED RIVER BOTTOM.
2. THE CONTRACTOR SHALL VERIFY THE RIVER BOTTOM ELEVATION AS FULL EXCAVATION
PROGRESSES. IF LOCALIZED OVER-EXCAVATION IS REQUIRED TO REMOVE THE EXISTING
RIPRAP AND/OR BEDDING STONE AND THAT OVER-EXCAVATION EXTENDS BELOW THE
MINIMUM FOUNDATION (FND) ELEVATIONS AS SHOWN ON THE PROFILE, THE CONTRACTOR
SHALL BACKFILL WITH #57 AGGREGATE TO RE-ESTABLISH THE LISTED MINIMUM FOUNDATION
ELEVATIONS PRIOR TO INSTALLING SEPARATOR WALL. NO FORMAL COMPACTION OR DENSITY
TESTING IS REQUIRED FOR THIS BACKFILL. HOWEVER, THE CONTRACTOR IS ENCOURAGED TO
PLACE THE MATERIAL IN LIFTS AND MAKE REASONABLE EFFORTS TO DENSIFY THE FILL
USING AVAILABLE EQUIPMENT TO THE EXTENT POSSIBLE.
3. THE MINIMUM EMBEDMENT IS 20.0 FEET AND THE SHEET PILE TIP ELEVATION
MUST BE EQUAL TO OR DEEPER THAN EL 370.0
399.60 EL
7+50.00 STA
START B-STONE
END R5000
399.60 TOP EL
10+55.00 STA
B-STONE
404.60 TOP EL
11+05.00 STA
B-STONE
MINIMUM B-STONE SECTION THICKNESS 6.25FT
EL 407
LANDSIDE OF SEPARATOR WALL
SAND FILL
EL 407
LANDSIDE OF SEPARATOR WALL
SAND FILL
OR FILL TO RIVER BOTTOM WHICHEVER IS DEEPER
MINIMUM B-STONE SECTION THICKNESS 6.25FT,
386.78 EL
7+50.00 STA
END C-STONE INITIAL BACKFILL
FND ELEV 382.5
FND ELEV 373.1
FND ELEV 363.8FND ELEV 363.80
MINIMUM FOUNDATION ELEVATION
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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MINIMUM SURVEYED
BOTTOM
RIPRAP EXCAVATION
1 1
| GENERAL |
| GI002 - INDEX OF DRAWINGS |
| CIVIL |
| GC100 - CONTRACTOR WORK LIMITS |
| CG203 - PROFILE - SEPARATOR WALL |
| CG204 - PROFILE - SEPARATOR WALL |
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