Rock Removal on the Middle Mississippi River

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RRAT 2014

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9 feet deep

1,500 feet long

Navigation Channel Design

During low water periods required to maintain a 9 feet deep and a minimum of 300 feet wide navigation channel, with

additional width in bends

Develop a Reliable, Safe, and Environmentally Sustainable Navigation Channel on the Middle Mississippi River

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Why is River Industry Important

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Regulating Works Project Benefits vs. Costs

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Pools vs Open River

Pools 300-195

Open River 195-0

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Lock & Dam #24, Clarksville, MO

Pools: Impounded Mississippi RiverUpper River (RM 300-195)

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Tools To Maintain Navigation(Open River RM 195-0)

Dikes and other Rock Structures

Revetments

Dredging

Rock Removal

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Rock RemovalWhat are we trying to remove?

NThebesGrand Tower

Mississippi River

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Problem Statement

Low Mississippi River stages will impact the St. Louis Districts’ ability to maintain the navigation channel at authorized project dimensions, in the Thebes Reach (RM

46-38) and Grand Tower Reach (RM 80-79), in the mid-December 2012.

Pinnacle Rock

Thebes Reach

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Phase 1 Engineering AnalysisPinnacle Rock Impacts at Thebes Reach

St. Louis from -5.0 to -7.0A-Minimum

B-Unacceptable

GTA B C D E F G H

-3.0 - -4.0 300+ 300 300 300+ 300+ 300+ 300+ 300-4.0 - -5.0 300 300 300 300 300 300 300+ 300-5.0 - -6.0 300 300 300 190 300 300 NONE 150-6.0 - -7.0 300 150 300 170 300 300 NONE 150

Minimally Acceptable for a 20 (4x5) Barge Tow (300 ft maximum channel or

will have less than 9' depth)

ETHEBES

Acceptable Channel Condition for a 20 (4x5) Barge Tow (300+ ft wide channel)

questionable channel width to flank through bend or for alignment purposes.

Unacceptable Channel Conditions for a 15 (3x5) Barge Tow (channel

C-Minimum

D-UnacceptableE-Minimum

F-Minimum

G-Unacceptable

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PHASE 1: • Accomplishes a 300 ft minimum channel in 4 locations that previously had insufficient width and depth.• The resultant channel can only support 15 barge tow. Larger tows must “double-trip” or break their tow apart and take

individual pieces separately through the reach.

PHASE 1 MILESTONES • 7 December 2012 – Decision made to go Urgent & Compelling

- Award 2 contracts based on sources sought query (Newt & Durocher)• 7 December 2012 – Received verbal approval on Justification & Approval• 7 December 2012 – Contract award. Letter contracts 50% ROM, Newt & Durocher • 11 January 2013 – Minimum channel requirements achieved through Thebes Gage 0’ (approx -7’ STL Gage)• 29 January 2013 – Contracts definitized to include modifications• 27 February 2013 – Phase 1 Completed• 1,000 cubic yards of material was removed at a cost of $8M

Rock Pinnacle Removal Phase 1

This what a 20 barge tow may look like trying to navigate through a 300 ft wide channel. Notice that there is no roomfor error considering the boxes along the channel border show additional phases of rock removal.

Acceptable Channel Condition for a 20 (4x5) Barge Tow (300+ ft wide channel)

Minimally Acceptable – at risk for a 20 (3x5) Barge Tow (300 ft maximum) channel or questionable channel width to flank through bend or foralignment purposes.

What Phase 1 Accomplished Thebes A B C D E F G H

3.9 - 3.0 300+ 300+ 300 300+ 300+ 300+ 300+ 300+

2.9 - 2.0 300+ 300+ 300 300+ 300 300 300+ 300+

1.9 - 1.0 300+ 300+ 300 300+ 300 300 300+ 300+

0.9 - 0.0 300+ 300+ 300 300+ 300 300 300+ 300+

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Rock Pinnacle Removal

Typical view of rock formation impacting the navigation channel

Navigation Channel

DS View - Rock Pinnacles near River Mile 41, Thebes, IL

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Rock Pinnacles at River Mile 38.5Thebes Reach

Illinois Missouri

300 ft Minimum Channel

Phase 2 Rock Removal

Highest Pinnacle

Provided Cross Section

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Current Water Level

Removal Elevation

River Bed

Low Water Channel

Water Depth at 0 Thebes (9 ft Channel After Removal)0 Thebes (9 ft)

Water Depth at 1-29-13 0800 was 5.8 ft at Thebes

2 Thebes (11 ft)

4 Thebes (13 ft)

6 Thebes (15 ft)

1 Thebes (10 ft)

-1 Thebes (8 ft)

-2 Thebes (7 ft)

3 Thebes (12 ft)

5 Thebes (14 ft)

7 Thebes (16 ft)

8 Thebes (17 ft)

-4 Thebes (5 ft)

-3 Thebes (6 ft)

-5 Thebes (4 ft)

-6 Thebes (3 ft)

-7 Thebes (2 ft)

-8 Thebes (1 ft)

-9 Thebes (0 ft)

Gage Reading (Depth after

Removal)

Geometry of a cross section at RM 38.5 (Not to Scale)

Rock Pinnacles

Cross Section at River Mile 38.5

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Rock Removal Surveys

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Rock Removal Surveys

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Rock Removal Methodologies• Environmental Assessment required us to “minimize the impact of the

environment”

16,000 lb hydro-hammer

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Rock Removal Methodologies

4.5 ton Grapple Drill & Blast

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Rock Removal - Drill and Blast Method

Courtesy of NWP19

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Rock Removal - Drill and Blast Method

Courtesy of NWP20

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Rock Removal QA/QC

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Rock Removal Phase 2 Base FY14

• 2 July – Awarded Rock Removal Phase 2 to Massman Construction for contract minimum of $1M

• Includes a base and 3 option years, total contract amount$19M to remove 6,300 cy• NTP given on 27 November.• Massman on site 7 December with removal beginning on 11 December.• Locations have been prioritized to minimize the impacts to navigation during the

months of December and January .• To date approximately 750 cy of material has been removed, 50% of the base

contract.

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Rock Removal Phase 2 ThebesRiver Miles 46-43Massman Construction

Removal CompleteUnder ConstructionNot Started

Minimum 300 feet Navigation Channel

PinnacleID

PinnacleLocation

PinnacleQuantity (cys) Date Started

%Complete

DateCompleted

RemovalMethod

C-100 B 312 3-Feb-2014 50% MechanicalC-101 B 16 3-Feb-2014 50% MechanicalC-102 C 116 0%C-103 C 117 0%C-104 C 312 0%C-105 D 1 14-Jan-2014 100% MechanicalC-106 D 174 11-Dec-2013 100% MechanicalC-107 D 114 12-Dec-2013 95% MechanicalC-108 D 333 14-Jan-2014 90% MechanicalC-109 D 11 14-Jan-2014 91% MechanicalC-110 D 18 0%C-111 E 3 0%

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Rock Removal Phase 2 ThebesRiver Miles 46-43

Massman Construction

PinnacleID

PinnacleLocation

PinnacleQuantity (cys) Date Started

%Complete

DateCompleted

RemovalMethod

C-100 B 312 3-Feb-2014 50% MechanicalC-101 B 16 3-Feb-2014 50% MechanicalC-102 C 116 0%C-103 C 117 0%C-104 C 312 0%C-105 D 1 14-Jan-2014 100% MechanicalC-106 D 174 11-Dec-2013 100% MechanicalC-107 D 114 12-Dec-2013 95% MechanicalC-108 D 333 14-Jan-2014 90% MechanicalC-109 D 11 14-Jan-2014 91% MechanicalC-110 D 18 0%C-111 E 3 0%

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Sites B, C, D, E ThebesRiver Miles 46-43

Massman Construction Update (As of 2-27-2014)

Hydro Hammer at C-106

Excavation at C-106

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Rock Removal Phase 2 Option 1 ThebesRiver Miles 44-42

PinnacleID

PinnacleLocation

PinnacleQuantity (cys)

Date Started

%Complete

DateCompleted

RemovalMethod

C-100 E 337 0%C-101 E 3 0%C-102 E 21 0%C-103 E 10 0%C-104 E 11 0%C-105 E 1 0%C-106 E 1 0%C-107 E 179 0%C-108 E 38 0%C-109 E 145 0%C-110 E 16 0%C-111 E 7 0%C-112 E 3 0%C-113 E 7 0%C-114 E 3 0%

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Rock Removal Phase 2 Option 1 ThebesRiver Miles 44-42

PinnacleID

PinnacleLocation

PinnacleQuantity (cys)

Date Started

%Complete

DateCompleted

RemovalMethod

C-115 F 46 0%C-116 F 178 0%C-117 F 75 0%C-118 F 12 0%C-119 F 14 0%C-120 F 16 0%C-121 F 1 0%C-122 F 31 0%C-123 F 1 0%C-124 F 150 0%

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Rock Removal Stage Requirement

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Rock Removal at RM 44.8

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Rock Removal at RM 44.8June 2006 Survey

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Rock Removal at RM 44.8October 2012 Survey

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Rock Removal at RM 44.8February 2013 Survey

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Reporting Incorrect Information

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Current Water Level

Removal Elevation

River Bed

Low Water Channel

Water Depth at 0 Thebes (9 ft Channel After Removal)0 Thebes (9 ft)

Water Depth at 1-29-13 0800 was 5.8 ft at Thebes

2 Thebes (11 ft)

4 Thebes (13 ft)

6 Thebes (15 ft)

1 Thebes (10 ft)

-1 Thebes (8 ft)

-2 Thebes (7 ft)

3 Thebes (12 ft)

5 Thebes (14 ft)

7 Thebes (16 ft)

8 Thebes (17 ft)

-4 Thebes (5 ft)

-3 Thebes (6 ft)

-5 Thebes (4 ft)

-6 Thebes (3 ft)

-7 Thebes (2 ft)

-8 Thebes (1 ft)

-9 Thebes (0 ft)

Gage Reading (Depth after

Removal)

Geometry of a cross section at RM 38.5 (Not to Scale)

Rock Pinnacles

Cross Section at River Mile 38.5

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Questions ?

Rock Removal on the Middle Mississippi River

Documents

Transcript of Rock Removal on the Middle Mississippi River

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