U.S. Army Corps of Engineers: Building Strong, Serving the Nation and the Armed Forces, 2020-2021

Page 88

NORTHWESTERN DIVISION

SPEED KEY TO BONNEVILLE LOCK REPAIR BY KERRY SOL AN, Por tland District

Repairing the Bonneville Navigation Lock required the contractor to break up, remove, and replace 1,400 cubic yards of concrete. Due to the urgency to return the lock to service, the contractor was pushed to complete the work in 25 days.

O

n Sept. 5, 2019, a flaw, long undetected, began its final series of failures at the Bonneville Navigation Lock. More than 70 feet underwater, sections of rebar had stretched and bent until the strain snapped them. The now-fragmented and deformed steel bars, which had once held a monolithic piece of concrete in place, allowed water to creep

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under the structure. Now, massive forces of water began to lift the hulking, multi-ton concrete sill from the floor of the lock. In the lock operator’s control room, alarms began to sound. The lock works as a waterborne elevator: It is a sealable basin placed in between a difference in water levels, that empties and fills to match the water level of either side. These “elevators” are a critical component of the Columbia River System, which allows $24 billion of commerce to flow up and down the river. That is all to say the Portland District had to act quickly. Engineers needed the lock to be emptied for a closer look; the U.S. Army Corps of Engineers put stop logs in to isolate the lock from the river and began to drain the lock. Next, a crane lowered a small group of engineers, one at a time, to the dry floor of the navigation lock. There, the flaw that had been 30 years in the making was finally apparent: Water pressure and time had begun to gouge a crater in the concrete after the rebar had given way. Back in Portland, engineers pored over the blueprints, reviewing photos from the last inspection. Matt Hansen, chief of the structural design section, said he and other engineers were astounded by the damage – he’d never seen anything like it. “It’s concrete – it should be just fine, right?” he said. “But we’re looking at the design and looking at the damage, and the truth was in front of us.” Officials at Portland District announced the same day that the navigation lock was shut down, halting all commerce traversing the Lower Columbia River – and they didn’t know when it would reopen. The plan was simple, but involved lots of work: Demolish the concrete sill. Lift out dozens of tons of concrete. Drill and cut into the concrete floor. Insert new rebar. Pour concrete. Stress test. Wait. Stress test again. Once the chamber was clear, the crew began drilling into the concrete floor to place rebar that would stabilize the new sill. After crews installed the rebar and built the form, they began piping down concrete into the navigation lock. It was the last large and crucial step in the repairs. After 48 hours, the concrete was completely hardened, or cured, and on Sept. 30, the lock operators opened the valves that feed water into the navigation lock, and began to operate the downstream miter gates. Less than 12 hours later, in the cover of night, but also at the first opportunity, the first barges traversed through Bonneville Navigation Lock for the first time in 25 days. Kristin Meira is the executive director of the Pacific Northwest Waterways Association, and was one of the stakeholders affected by the outage. “We never like to see things like this happen, but the short duration of the outage and the constant flow of information [from Portland District] allowed barge lines, grain growers, and other river users to manage and minimize the disruption to their own operations,” she said. For most of the crews and engineers that had worked through the outage, the lock’s return to service was celebrated with drinks. But Martha Brandl, the on-site administrative contracting officer, said she wanted something else: “Sleep.” n


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SOUTHWESTERN DIVISION

2min
page 66

416th THEATER ENGINEER COMMAND Answering the call to serve during COVID-19 pandemic

4min
pages 158-160

412th THEATER ENGINEER COMMAND

5min
pages 156-157

249th ENGINEER BATTALION (PRIME POWER)

3min
pages 24, 154-155

U.S. ARMY CORPS OF ENGINEERS FINANCE CENTER

3min
pages 136, 153

MARINE DESIGN CENTER MANAGING PROCUREMENT OF DREDGE FOR AZERBAIJAN

3min
pages 64, 152

OFTEN, THE QUESTION ARISES: “WHAT DOES AVIATION HAVE TO DO WITH LOGISTICS?” THE ANSWER IS: “A LOT MORE THAN YOU THINK!”

5min
pages 150-151, 162

U.S. ARMY CORPS OF ENGINEERS INSTITUTE FOR WATER RESOURCES

2min
pages 148-149, 163

LOCATION MATTERS

4min
pages 130, 146-147

A PART OF THE SOLUTION: HUNTSVILLE CENTER'S RESPONSE EFFORT TO SAVE LIVES

16min
pages 2, 6, 140-145

ERDC RESEARCHERS TACKLE HARMFUL ALGAL BLOOMS

4min
pages 137-139

ERDC RESEARCHERS IMPROVE NUMERICAL MODELING FOR POST-WILDFIRE FLOOD RISK MANAGEMENT

4min
pages 134-136

ERDC ANSWERS THE COVID-19 CALL

5min
pages 56, 132-133

U.S. ARMY ENGINEER RESEARCH AND DEVELOPMENT CENTER

1min
pages 7, 132-133

TASK FORCE ESSAYONS PROVIDES CRITICAL ENGINEERING SUPPORT

4min
pages 129-131

POWERING UP A COUNTRY, ONE TOWER AT A TIME

12min
pages 125-130, 163

MIDDLE EAST DISTRICT BUILDS STRONG DURING PANDEMIC

6min
pages 13-14, 123-125

FINDING THE SCRATCH BEFORE STARTING FROM SCRATCH

5min
pages 8, 122-123

TRANSATLANTIC DIVISION LEADS THE WAY IN CONTINGENCY SUPPORT

8min
pages 2, 4, 6, 8, 118-121

TRANSATLANTIC DIVISION

1min
pages 24, 32, 38, 118-121

PROCESSING THE FUTURE IN A PANDEMIC WORLD

2min
pages 75, 117

FINDING CONSTRUCTION ALTERNATIVES

3min
pages 4, 115-117

ENGINEERING CENTER’S EXPERTISE ENHANCES U.S. INDO-PACIFIC REGIONAL PRESENCE

3min
pages 112-113, 138

HONOLULU DISTRICT CONDUCTS 43 SITE ASSESSMENTS

3min
pages 8, 111-112

DISTRICT PROVIDES TECHNICAL SUPPORT DURING CONSTRUCTION OF ROK F-35A FACILITIES

5min
pages 38, 109-110, 116

ALASKA DISTRICT CONVERTS ARENA INTO ALTERNATE CARE SITE

1min
page 108

ALASKA DISTRICT DELIVERS FACILITIES TO SUPPORT F-35A AIRCRAFT ARRIVAL

5min
pages 106-108, 128, 130

PACIFIC OCEAN DIVISION

4min
pages 104-105, 107, 114

SAN FRANCISCO DISTRICT BIOLOGISTS WORK TO PRESERVE ENDANGERED SALMON

3min
pages 13, 102-103

BUILDING AN URBAN RANGER PROGRAM

4min
pages 2, 4, 98-101, 138, 162

SACRAMENTO DISTRICT DELIVERS DESPITE COVID-19 CHALLENGES

4min
pages 96-98, 136

RAPID COVID-19 RESPONSE IN THE HIGH DESERT

5min
pages 93-95, 130, 138

SOUTH PACIFIC DIVISION

2min
pages 92, 99

WALLA WALLA DISTRICT DEVELOPS FISH SUSTAINABILITY PROJECTS IN THE NORTHWEST

3min
pages 90-91, 136

U.S. Army Corps of Engineers: Building Strong, Serving the Nation and the Armed Forces, 2020-2021

3min
pages 89-90, 114

SPEED KEY TO BONNEVILLE LOCK REPAIR

3min
page 88

RESPONSE, RESTORATION, RESEARCH: REBUILDING MISSOURI

7min
pages 24, 32, 84-87

OMAHA DISTRICT SIMPLIFIES ITS CONTRACTING PROGRAMS

3min
pages 20, 83-84

NGA WEST PROJECT MAKING PROGRESS DURING COVID-19 CRISIS

2min
pages 4, 81-82

NORTHWESTERN DIVISION RALLIES TO COMPLETE MASSIVE COVID ASSESSMENT EFFORT

4min
pages 56, 79-81, 116

NORTHWESTERN DIVISION

2min
pages 78, 85

CONSTRUCTION OF KC-46A CAMPUS AT TINKER REMAINS ON TASK DESPITE PANDEMIC

2min
pages 77, 128

FLOOD OF 2019 AFFECTS MKARNS NAVIGATION

1min
pages 76, 114

TULSA DISTRICT SUPPORTS OKLAHOMA COVID-19 RESPONSE

1min
pages 74-75

OZARK-JETA TAYLOR’S SLANT-AXIS TURBINE REHAB

5min
pages 2, 72-73

DISTRICT EMPLOYEES ENLISTED FOR COVID-19 MODELING TASK FORCE

2min
pages 70-71, 80

PROVIDING SITE EVALUATIONS FOR ALTERNATE CARE FACILITIES

2min
pages 38, 69-70, 163

SOUTHWESTERN DIVISION EXECUTES HURRICANE HARVEY SUPPLEMENTAL PROGRAM

4min
pages 2, 13, 67-68, 163

EMERGENCY SUPPLEMENTAL PROJECTS TO AFFECT NORTH CAROLINA FOR DECADES

3min
pages 63-65, 162

DMCAS: SAVANNAH’S SOLUTION FOR PLACING DREDGED MATERIAL

3min
pages 14, 62-63

SAVANNAH HARBOR DEEPENING

3min
pages 6, 59-61

MOBILE DISTRICT NEARS COMPLETION OF SHIP ISLAND

3min
pages 8, 57-59

ECOSYSTEM RESTORATION FOUNDATION PROJECTS BRING WATER TO EVERGLADES NATIONAL PARK

3min
pages 55-57

PENINSULA STUDY DRAWS SWEEPING PUBLIC ENGAGEMENT

2min
pages 53-54, 116

SOUTH ATLANTIC DIVISION

1min
pages 52, 58

VICKSBURG DISTRICT EMPLOYEE RECEIVES NATIONAL ENGINEERING AWARD

2min
pages 51, 86

USACE, SAMARITAN’S PURSE GO ABOVE AND BEYOND TO HELP STORM SURVIVOR

4min
pages 49-50, 128, 130

DISTRICT CONVERTS HOTEL INTO HOSPITAL WITHIN DAYS OF REQUEST

4min
pages 46-48, 80, 136

ROCK ISLAND DISTRICT SUPPORTS DERECHO RECOVERY EFFORTS ACROSS IOWA

2min
pages 44-45, 138

CONSTRUCTION REACHES NEW HEIGHTS ON RED RIVER OF THE NORTH PROJECT

3min
pages 42-43, 114

MISSISSIPPI VALLEY DIVISION

4min
pages 40-41, 46

WORKING AS ESSENTIAL PERSONNEL IN A COVID-19 ERA

3min
pages 37-39

NASHVILLE DISTRICT RESPONDS TO A GLOBAL PANDEMIC

2min
pages 36-37

TEAM EFFORT MAKES WAUGOSHANCE POINT TARGET PROJECT A SUCCESS

3min
pages 35-36

BLUESTONE DAM: THE FINAL PHASE

2min
page 34

DETROIT DISTRICT RAPIDLY RESPONDS TO MICHIGAN’S CORONAVIRUS CRISIS

2min
pages 31, 33

CHICAGO DISTRICT CIVIL WORKS REALIGNMENT

1min
pages 31-32

CHICAGO DISTRICT’S “OPERATION ENDURING HEALTH”

4min
pages 29-30

THE GREAT LAKES RESTORATION INITIATIVE

3min
pages 27-28

GREAT LAKES AND OHIO RIVER DIVISION

4min
pages 26-27

DISTRICT’S BRIDGE INSPECTION AND EVALUATION TEAM REACHES NEW HEIGHTS

3min
pages 23, 25, 160

FROM THE MID-ATLANTIC TO CANADA, FORESTERS MANAGE UNIQUE ARMY PROGRAM

3min
pages 21-24

NEW YORK DISTRICT CONSTRUCTS “STEAM” TEACHING SCHOOL

2min
pages 19-21

DESPITE COVID-19, USACE HITS 10-MILLION MILESTONE IN BOSTON HARBOR

3min
pages 8, 18-19

USACE HELPS OPEN CENTER FOR WOUNDED WARRIOR CARE IN REPUBLIC OF GEORGIA

2min
pages 17, 163

DISTRICT’S RADIOLOGICAL TEAM PROVIDES EXPERTISE THROUGHOUT USACE AND BEYOND

5min
pages 6, 15-16, 162

USACE PROVIDES A SIMPLE SOLUTION TO ADDRESS THE COMPLEX COVID-19 PROBLEM

4min
pages 2, 4, 11-12, 14, 162

NORTH ATLANTIC DIVISION

1min
pages 3, 10, 12-13
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