Att. A - DWR Unit 4 concept sketches ALTS 1-3 - 20250818.pdf

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Attached to
Dworshak Unit 4
Solicitation number
W912EF25SS40
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The document appears to be a detailed architectural/engineering design set showing multiple alternative configurations for a facility expansion. The drawings depict six different alternatives (1A, 1B, 2A, 2B, 3A, 3B) for adding a fourth unit to an existing complex, with variations in fill and bridge placement across different bays (primarily Bays 4, 5, and 6). Each alternative shows proposed modifications at four different elevation levels (1005, 988, 973, and 956), including new infrastructure elements such as retaining walls, vaults, bridge decks, and support structures. Common design elements across alternatives include new pavement, fill areas, bridge supports, and an assembly bay with rotor pedestals. The design focuses on strategic expansion and reconfiguration of existing erection bays, skeleton bays, and associated infrastructure, with green-highlighted areas indicating proposed new construction or modifications.

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Other files

File Type Posted
Att. A - DWR Unit 4 concept sketches ALTS 1-2 - 20251002.pdf PDF
Att. B - Dworshak Photos - Existing site & historical construction.pdf PDF
Att. C - Dworshak civil structural existing reference drawings.pdf PDF

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UNIT #3

UNIT #2UNIT #1

BAY 6

WALL

AT TRAINING

ROAD DECK

SPILLWAY

UNIT #1 UNIT #2

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UNWATERING CONTROL GALLERY 106

ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

FILL

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PAVEMENT

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RETAINING

EXISTING

TUNNEL

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EXISTING

UNIT #4

WAREHOUSE 317 (OLD FISHWAY GALLERY)

UNIT #4

UNWATERING CONTROL GALLERY 106

BAY 4

BAY 6

SKELETON

BAY 4

BAY 6

SKELETON

BAY 4

BAY 6

SKELETON

BAY 4

BAY 6

SKELETON

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3-PHASE

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BAY 5

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OPEN AT SKELETON BAYS 5 & 6

ADD UNIT 4, FILL AT BAY 4,

ALTERNATIVE 1A:

WALL

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OPEN AT SKELETON BAYS 5 & 6

ADD UNIT 4, FILL AT BAY 4,

ALTERNATIVE 1A:

OPEN AT SKELETON BAYS 5 & 6

ADD UNIT 4, FILL AT BAY 4,

ALTERNATIVE 1A:

OPEN AT SKELETON BAYS 5 & 6

ADD UNIT 4, FILL AT BAY 4,

ALTERNATIVE 1A:

ELEVATION 1005

ELEVATION 988

ELEVATION 973

ELEVATION 956

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UNIT #3

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BAY 6

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UNIT #1 UNIT #2

UNIT #3

UNWATERING CONTROL GALLERY 106

ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

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TUNNEL

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UNIT #4

WAREHOUSE 317 (OLD FISHWAY GALLERY)

UNIT #4

UNWATERING CONTROL GALLERY 106

BAY 4

BAY 6

SKELETON

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BAY 6

SKELETON

BAY 4

BAY 6

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BAY 4

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OPEN SKELETON AT BAYS 5 & 6

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ALTERNATIVE 1B:

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ADD UNIT 4, BRIDGE AT BAY 4,

ALTERNATIVE 1B:

OPEN SKELETON AT BAYS 5 & 6

ADD UNIT 4, BRIDGE AT BAY 4,

ALTERNATIVE 1B:

OPEN SKELETON AT BAYS 5 & 6

ADD UNIT 4, BRIDGE AT BAY 4,

ALTERNATIVE 1B:

ELEVATION 1005

ELEVATION 988

ELEVATION 973

ELEVATION 956

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UNWATERING CONTROL GALLERY 106

ERECTION BAY BAY 1 BAY 2 BAY 3

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ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

(OVER FILL)

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UNIT #4

WAREHOUSE 317 (OLD FISHWAY GALLERY)

UNIT #4

UNWATERING CONTROL GALLERY 106

BAY 4

BAY 4

BAY 4

BAY 4

BAY 5

SKELETON

BAY 5

SKELETON

BAY 5

SKELETON

BAY 5

SKELETON

DECK

BRIDGE

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NEW

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FILL

NEW

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VAULT

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VAULT

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VAULT

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TRANSF

3-PHASE

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BELOW

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OPEN AT SKELETON BAY 6

ADD UNIT 4, FILL AT BAYS 4 & 5, BRIDGE AT BAY 5,

ALTERNATIVE 2A:

FILL

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ALTERNATIVE 2A:

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ADD UNIT 4, FILL AT BAYS 4 & 5, BRIDGE AT BAY 5,

ALTERNATIVE 2A:

OPEN AT SKELETON BAY 6

ADD UNIT 4, FILL AT BAYS 4 & 5, BRIDGE AT BAY 5,

ALTERNATIVE 2A:

ELEVATION 1005

ELEVATION 988

ELEVATION 973

ELEVATION 956

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UNWATERING CONTROL GALLERY 106

ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

(OVER FILL)

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EXISTING

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UNIT #4

WAREHOUSE 317 (OLD FISHWAY GALLERY)

UNIT #4

UNWATERING CONTROL GALLERY 106

BAY 4

BAY 4

BAY 4

BAY 4

BAY 5

SKELETON

DECK

BRIDGE

NEW

TRANSF

3-PHASE

NEW

BELOW

TO

OPEN

OPEN AT SKELETON BAY 6

ADD UNIT 4, BRIDGE AT BAYS 4 & 5,

ALTERNATIVE 2B:

BAY 6

SKELETON

BELOW

TO

OPEN

BAY 6

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SKELETON

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BAY 6

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OPEN

BELOW

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BAY 5

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OPEN

BELOW

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OPEN

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BAY 6

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BELOW

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OPEN

BELOW

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OPEN

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OPEN

DECK

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OPEN AT SKELETON BAY 6

ADD UNIT 4, BRIDGE AT BAYS 4 & 5,

ALTERNATIVE 2B:

OPEN AT SKELETON BAY 6

ADD UNIT 4, BRIDGE AT BAYS 4 & 5,

ALTERNATIVE 2B:

OPEN AT SKELETON BAY 6

ADD UNIT 4, BRIDGE AT BAYS 4 & 5,

ALTERNATIVE 2B:

ELEVATION 1005

ELEVATION 988

ELEVATION 973

ELEVATION 956

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UNIT #3

UNWATERING CONTROL GALLERY 106

ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

FILL

EXISTING

(OVER FILL)

PAVEMENT

EXISTING

FILL

EXISTING

FILL

EXISTING

FILL

EXISTING

FILL

EXISTING

FILL

EXISTING

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BAY 4

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WAREHOUSE 317 (OLD FISHWAY GALLERY)

UNIT #4

UNWATERING CONTROL GALLERY 106

BAY 4

BAY

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BAY 4

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ASSEMBLY

BAY 4

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ASSEMBLY

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FILL

NEW

FILL

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TRANSF

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OPEN AT SKELETON BAY 6

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ALTERNATIVE 3A:

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BAY 6

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FILL

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ROTOR

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ROTOR

PEDESTAL

ROTOR

OPEN AT SKELETON BAY 6

ADD UNIT 4, ADD ASSEMBLY BAY, FILL AT BAYS 4 & 5,

ALTERNATIVE 3A:

OPEN AT SKELETON BAY 6

ADD UNIT 4, ADD ASSEMBLY BAY, FILL AT BAYS 4 & 5,

ALTERNATIVE 3A:

OPEN AT SKELETON BAY 6

ADD UNIT 4, ADD ASSEMBLY BAY, FILL AT BAYS 4 & 5,

ALTERNATIVE 3A:

ELEVATION 1005

ELEVATION 988

ELEVATION 973

ELEVATION 956

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UNIT #3

UNIT #2UNIT #1

BAY 6

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ROAD DECK

SPILLWAY

UNIT #1 UNIT #2

UNIT #3

UNWATERING CONTROL GALLERY 106

ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

ERECTION BAY BAY 1 BAY 2 BAY 3

FILL

EXISTING

(OVER FILL)

PAVEMENT

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FILL

EXISTING

FILL

EXISTING

FILL

EXISTING

FILL

EXISTING

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EXISTING

FILL

EXISTING

FILL

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WALL

RETAINING

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RETAINING

EXISTING

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EXISTING

TUNNEL

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UNIT #4

BAY 4

BAY

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BAY 6

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UNIT #4

UNWATERING CONTROL GALLERY 106

BAY 4

BAY

ASSEMBLY

BAY 4

BAY

ASSEMBLY

BAY 4

BAY

ASSEMBLY

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UNOCCUPIED

UNOCCUPIED

BELOW

TO

OPEN

BELOW

TO

OPEN

BELOW

TO

OPEN

BELOW

TO

OPEN

BELOW

TO

OPEN

BELOW

TO

OPEN

BELOW

TO

OPEN

DECK

BRIDGE

NEW

TRANSF

3-PHASE

NEW

BELOW

TO

OPEN

OPEN AT SKELETON BAY 6

ADD UNIT 4, ADD ASSEMBLY BAY, BRIDGE AT BAYS 4 & 5,

ALTERNATIVE 3B:

PEDESTAL

ROTOR

PEDESTAL

ROTOR

PEDESTAL

ROTOR

PEDESTAL

ROTOR

OPEN AT SKELETON BAY 6

ADD UNIT 4, ADD ASSEMBLY BAY, BRIDGE AT BAYS 4 & 5,

ALTERNATIVE 3B:

OPEN AT SKELETON BAY 6

ADD UNIT 4, ADD ASSEMBLY BAY, BRIDGE AT BAYS 4 & 5,

ALTERNATIVE 3B:

OPEN AT SKELETON BAY 6

ADD UNIT 4, ADD ASSEMBLY BAY, BRIDGE AT BAYS 4 & 5,

ALTERNATIVE 3B:

ELEVATION 1005

ELEVATION 988

ELEVATION 973

ELEVATION 956

BAY 6

SKELETON

SUPPORT

BRIDGE

NEW

BELOW

TO

OPEN

SUPPORT

BRIDGE

NEW

BAY 6

SKELETON

BELOW

TO

OPEN

BAY 6

SKELETON

SUPPORT

BRIDGE

NEW

g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Polygon g4ecdmgz Polygon g4ecdmgz Polygon g4ecdmgz Polygon g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle g4ecdmgz Rectangle

ALT 1A - U4 + FILL - ALL LEVELS - 20250808
ALT 1B - U4 + NO FILL - ALL LEVELS - 20250808
ALT 2A - U4 + AB + FILL - ALL LEVELS - 20250808
ALT 2B - U4 + AB + NO FILL - ALL LEVELS - 20250808
ALT 3A - U4 + AB + FILL - ALL LEVELS - 20250808
ALT 3B - U4 + AB + NO FILL - ALL LEVELS - 20250808

File details come from the government source that posted it. Updated .