B09_Amendment_03_GRCA257282_FinalCD_Addendum_03_Compiled_wSeal_0003.pdf

National Park Service

Replace Wastewater Plant South Rim Village

GRCA-257282

100% Complete Construction Documents Addendum 3

August 27, 2026

Prepared by:

Jacobs Government Services Company Greenwood Village, CO

Contract No. 140P2023D0006 Task Order No. 140P2023F0235

GRCA 257282 – 100% Complete CD: Addendum 03

Jacobs Engineering Group Inc. 2

1. Addendum Contents This addendum addresses questions from bidders on the 100% Final Construction Documents for the Replace Wastewater Plant South Rim Village project, dated June 2025, that were received by Jacobs on August 20, 2026. The questions and responses are attached. The questions resulted in minor updates to drawings. Revisions are captured in markup format showing additions in red, deletions in green and notes in blue. Revised documents are listed below and attached. Revised documents will ultimately be incorporated into conformed contract documents after project award.

1.1 Revisions to Drawings

New or Updated

Sheet No. DWG No. Sheet Name Description

Updated 277 25S1020 Process Tanks Structural Lower Level Plan

Clarification of column size

Updated 279 25S1040 Process Tanks Structural Monorail Frame Plan

Revised detail callout to reference new Extended Shear Plate Connection detail on 25S5001

Updated 285 25S5001 Process Tanks Structural Details Addition of Extended Shear Plate Connection detail

Updated 391 87S1030 Compost Facility Structural Foundation Plan and Detail

Clarification of armor angle size

1.2 Revisions to Standard Details

New of Updated

Standard Detail No.

Name Description

None

1.3 Revisions to Specifications

New of Updated

Specification No.

Name Description

None

140P2026R0101 / Amendment 03/

08.20.2026

GRCA 257282, Replace South Rim Wastewater Treatment Plant

Question No. Sheet or Reference Question A/E Response Response By Response Date

1 25S1020 Ref. 25S1020 Process Tanks Structural Lower Level Plan; What size are the (2) columns 10’-0’ North of Line 1?

The columns are W12x45. Callout provided by markup on drawing 25S1020 (attached). Jacobs/ Wayne

Kohler 8/27/2026

2 25S5001

Ref. 1/25S5001 Moment Connection; The perpendicular beam connections to the column web are called out as 0512-020. These beams are not erectable due to the presence of the 3/8” stiffeners above and below the beam connection. Please advise.

New connection detail and callouts provided for the beam to column web connection. Markups provided on drawings 25S1040 and 25S5001 (attached).

Jacobs/ Wayne Kohler 8/27/2026

3 87S1030 Ref. 1/87S1030 “Armor Angles”; What size are the angles? Size and spacing of the headed studs?

Use SST L3x3x¼. Markup provided for drawing 87S1030 (attached). Jacobs/ Wayne

Kohler 8/27/2026

4 Spec 09 90 00

Ref. 09 90 00 Painting and Coatings; We assume all structural steel is to be shop primed with System No. 5 Exposed Metal – Mildly Corrosive other than the steel roof trusses which are to be shop primed with System No. 4 Exposed Metal – Highly Corrosive. Please confirm.

Steel roof trusses and monorails shall be shop primed with System No. 4 Exposed Metal – Highly Corrosive.

All other structural steel shall be shop primed with System No. 5 Exposed Metal – Mildly Corrosive.

Jacobs/ John Yang 8/27/2026

P L

O T D

A T

E

P L

O T T

IM

E

-J

U N -2

:3

OF

175376

0" 1"

BAR MEASURES 1" LONG

FULL SIZE DRAWINGS = 22"x34"

G R

C A -2

GRAND CANYON, SOUTH RIM

TITLE OF SHEETSUB SHEET NO.DESIGNED:

TECH. REVIEW:

CADD:

DATE:

DRAWING NO.A/E FIRM

SHEET

S S /V i

06/2025 401

VILLAGE, CO

GREENWOOD

COMPANY

SERVICES

GOVERNMENT

JACOBS

PMIS/PKG NO.

257282

D S o u th R im \4 D e li v e ry \4

C

A D D e s ig n \G

R C

A \2

\M ic ro s ta ti o n V i

D ra w in g s \S

T R

U C \2

S

D .d g n

C

O M

P L E

T E C

O N

S T

R U

C T

IO

N D

O C

U M

E N

T S

A EB C D

3/16"=1'-0"

N

LOWER LEVEL PLAN

D

1.9

2.7

3.6

A

25S3001

A

25S3001

EL 6771.09

T.O. CONCRETE FILL

B

25S3001

B

25S3001

ENLARGED PLAN

25S4001

E

25S3002

2'-0"

OVER BASE SLAB, TYP

CONCRETE FILL

WALL, TYP

CONCRETE

8'-0" 37'-0" 19'-0" 11'-0"

75'-0"

0330-044

8'-0"

TYP 4 BAYS

COATING, ALL WALLS,

CHEMICAL RESISTANT

1'-6"

/2

W/ SUMP

INVERT FLUSH

1'x1' OPENING

1.9

2.7

3.6

EL 6771.09

FILL

CONCRETE

T.O.

BASE SLAB

EDGE OF

SHEET NOTES

GENERAL NOTES

0315-021

FUTURE EXPANSION

BASE SLAB FOR

TYP @

1'-0" DEEP SUMP

C

25S3002

C

25S3002

J

25S3003

D

25S3002

F

25S3002

SIM

F

25S3002

H

25S3003

F

25S3002

TYP

4'-6"

0315-131SEE , SUBMIT LAYOUT FOR REVIEW.

FOR WALL CONSTRUCTION JOINT LOCATION, B.

DRAWINGS 01S0001 AND 01S0002.

FOR GENERAL STRUCTURAL NOTES, SEE A.

REINFORCE WITH #4@12" EW, T&B.

5'x5'x10" THICK CONCRETE STAIR LANDING, 4.

APPROVAL.

CONSTRUCTION JOINT LAYOUT FOR REVIEW AND

CONTRACTOR SHALL SUBMIT BASE SLAB 3.

DRAWING 06C2001.

FACILITY LOCATION CONTROL POINT, SEE CIVIL 2.

SHOWN IN SECTIONS.

PROVIDE ADDITIONAL REINFORCEMENT WHERE

REINFORCE BASE SLAB WITH #8@12" EW, T&B. 1.

0330-003

CORNERS AND INTERSECTIONS

6" BAR SPACING, TYP @ ALL

NOTE 2

NOTES 1 & 3

TYPICAL, SEE

BASE SLAB,

NOTE 4

VERIFY W/ CIVIL

TOC 6778.33,

0551-001

AL STAIRS, TYP

VERIFY W/ CIVIL

TOC 6778.33,NOTE 4

NOTE 2

F

25S3002

SIM

SIM

C

25S3002

H

25S3003

0330-044

TYPE 'A'

TYP 9 PLCS

SUMP 2'x2'x9"

M

25S3004

J

25S3002

DIVIDER WALL

TYP

BASIN WALL,

TYP

WIER WALL,

TYP 4 PLACES

OPENINGS,

3/16"=1'-0"

N

PLAN @ EFFLUENT CHANNELS

EL 6781.4

TOC

EL 6769.40 TYP

T.O. BASE SLAB

(TYP 3 PLCS)

TOC EL 6773.14

2'x2'x1'-10" DEEP SUMP, W KOHLER

A FIRTH

LOWER LEVEL PLAN

B CLEGG STRUCTURAL

PROCESS TANKS

25S1020

9"9"

EL 6765.24

T.O. CONCRETE FILL

CONCRETE FILL

EL 6765.45

T.O. CONCRETE FILL

EL 6774.40 (TYP)

T.O. CONCRETE FILL

EL 6773.90 (TYP)

T.O. CONCRETE FILL

EL 6769.57 (TYP)

T.O. CONCRETE FILL

(TYP)

FILL EL 6769.91

T.O. CONCRETE

M

25S3004

FILL EL 6770.23 (TYP)

T.O. CONCRETEFILL EL 6769.57 (TYP)

T.O. CONCRETE

EL 6769.78 (TYP)

T.O. CONCRETE FILL

FILL EL 6769.72

T.O. CONCRETE

EL 6765.15

T.O. CONCRETE FILL

S U

M P

CONCRETE FILL

EL 6764.40

T.O. CONCRETE FILL

FOUNDATION, TYP OF 2

CONCRETE DRILLED PIER 5

25S5001

40 8 16

3/16"=1'-0"

W12x45 COL

TYP OF 2

O T D

A T

E

P L

O T T

IM

E

-J

U N -2

:3

OF

175376

0" 1"

BAR MEASURES 1" LONG

FULL SIZE DRAWINGS = 22"x34"

G R

C A -2

GRAND CANYON, SOUTH RIM

TITLE OF SHEETSUB SHEET NO.DESIGNED:

TECH. REVIEW:

CADD:

DATE:

DRAWING NO.A/E FIRM

SHEET

S S /V

COMPANY

SERVICES

GOVERNMENT

JACOBS

S o u th R im \4 D e li v e ry \4

C

A D D e s ig n \G

R C

A \2

\M ic ro s ta ti o n V i

D ra w in g s \S

T R

U C \2

S

D .d g n

C

O M

P L E

T E C

O N

S T

R U

C T

IO

N D

O C

U M

E N

T S

A EB C D

5 5

1.9

2.7

3.6

4'-0"

3/16"=1'-0"

N

MONORAIL FRAME PLAN

11'-0"

FRAME, TYP

MONORAIL

STEEL

75'-0"

8'-0" 37'-0" 19'-0" 11'-0"

9"EQEQ9"

TYP

WALLS BELOW,

CENTER ON

STEEL COLUMN,

W x

W12x35

W x

W x

W x

W x

W x

W x

W x

GENERAL SHEET NOTES

DRAWINGS 01S0001, 01S0002, AND 01S0003.

FOR GENERAL STRUCTURAL NOTES, SEE A.

LEGEND

MOMENT CONNECTION

BEAM TO FLANGE

BELOW

STRUCTURE

25S5001

W12x35

W12x35

W12x35

W12x35

W12x35

25S5001

M

25S3004

M

25S3004

NOTE 1

TOS EL 6808.65

S

X M

O N

O R

A

IL

B

25S3001

B

25S3001

M

25S3004

SEE

KICKER

TYP

FABRICATION.

CHANGE TO TOP OF STEEL PRIOR TO

OF THE HOIST IS MET. SUBMIT RFI REQUESTING

SHALL BE SUCH THAT THE HIGH HOOK ELEVATION

VERIFIED PRIOR TO FABRICATION. TOP OF STEEL

MONORAIL FRAME TOP OF STEEL SHALL BE 1.

0512-020

A FIRTH

MONORAIL FRAME PLAN

B CLEGG STRUCTURAL

PROCESS TANKS

25S1040

25S1030

10 PLCS, SEE

W12 COL, TYP

(7 1/2 TON PICK)

MONORAIL

W x

W x

40 8 16

3/16"=1'-0"

TYP

25S5001

DELETE ITEMS

HIGHLIGHTED IN GREEN

O T D

A T

E

P L

O T T

IM

E

-J

U N -2

:3

OF

175376

0" 1"

BAR MEASURES 1" LONG

FULL SIZE DRAWINGS = 22"x34"

G R

C A -2

GRAND CANYON, SOUTH RIM

TITLE OF SHEETSUB SHEET NO.DESIGNED:

TECH. REVIEW:

CADD:

DATE:

DRAWING NO.A/E FIRM

SHEET

S S /V

COMPANY

SERVICES

GOVERNMENT

JACOBS

S o u th R im \4 D e li v e ry \4

C

A D D e s ig n \G

R C

A \2

\M ic ro s ta ti o n V i

D ra w in g s \S

T R

U C \2

S

D .d g n

C

O M

P L E

T E C

O N

S T

R U

C T

IO

N D

O C

U M

E N

T S

MOMENT CONNECTION

25S1040

KICKER CONNECTION

25S1040

KICKER CONNECTION

25S1040

SEE PLAN

WF BEAM,

3"

T Y P1 1/ 2"

/2

(2) 3/4" BOLTS

PLAN

SECTION A-A

3"

T Y P1 1/ 2"

1/4

KNIFE PLATE

1/4

PLATE

COLUMN FLANGES

DISTANCE BETWEEN

3/8" x REQD x

R E Q

D (1 1/ 4"

BRACE

(WHERE OCCURS)

OPPOSITE SIDE

CONNECTION ON

A A

3/8" KNIFE PL x REQD

(2) 3/4" BOLTS

WF COL, SEE PLAN

WF COL, SEE PLAN

3/4"=1'-0" 3/4"=1'-0"

25S1040

MONORAIL CONNECTION

SECTION A-A

1"=1'-0"

AA

A

1/4

3 SIDES

SEE PLAN

WF BEAM (ABOVE)

WORKABLE GAGE

MONORAIL BEAM

GAGE

WORKABLE

WF BEAM

3/4" BOLT (TYP)

(BELOW)

MONORAIL BEAM

PLAN

WF BEAM (ABOVE)

NUTS AS REQD BY CRANE MFR

W/ BEVELED WASHERS AND LOCK

(4) 3/4" A325 FULLY TENSIONED BOLTS

BY CRANE MFR

MONORAIL AS REQD

PLATE EA SIDE

3/8" x REQD STIFFENER

25S3004 25S3004

SECTION A-ASIDE VIEW

TOP VIEW

5/16

FOR CONNECTION AS REQD

SEE PLAN. COPE FLANGES

PERPENDICULAR BEAM,

ES, T&B

3/8" STIFFENER,

SEE PLAN

WF COLUMN,

SEE PLAN

WF BEAM,

/4

/4

END PLATE

7/8" x 7" x 1'-4 1/4"

SEE PLAN

WF COLUMN,

SEE PLAN

WF BEAM,

BOLTS

(8) 3/4" A325N

M

IN

/4

A

A

END PLATE

0512-020

EA SIDE

STIFFENER

BEAM CONNECTION

PERPENDICULAR

A FIRTH

DETAILS

B CLEGG STRUCTURAL

PROCESS TANKS

25S5001

1/4

1/4

TYP

T Y

P 1"

1/4

1/4

TYP GUSSET

3/8" x REQD

25S3004

SECTION A-A

DRILLED PIER

3/8"=1'-0"

TYPE 'A'

GRID

0512-001

M

IN

IM

U M E

M B

E D

(8) #8 VERTS

#4 TIES @ 12" OC

DIA 2'-0"

PLANS

WF COLUMN, SEE

CONCRETE PIER

SEE CIVIL

FINISHED GRADE,

AA

TIE, TYP

VERT, TYP

CLR

3"

1"=1'-0"

0 1 2 3

0 1 2 3

3/4"=1'-0"

0 2 3

3/4"=1'-0"

0 2 3

3/8"=1'-0"

0 4 6

1½

3" 3"

1½

1½"

½"COL FLANGE

STIFFENER PLATES

SEE 1

COL WEB

½" EXTENDED SHEAR

PLATE x REQ'D

EXTENDED SHEAR PLATE

CONNECTION6

½"

NOTES

1. BEAM ON ONE SIDE SHOWN. BEAM ON BOTH

SIDES SIMILAR

STIFFENER PLATES

1/4

3 SIDES

1½"

SIDE VIEW

SECTION

⅜"

DELETE ITEMS

HIGHLIGHTED IN GREEN

O T D

A T

E

P L

O T T

IM

E

-J

U N -2

:3

OF

175376

0" 1"

BAR MEASURES 1" LONG

FULL SIZE DRAWINGS = 22"x34"

G R

C A -2

GRAND CANYON, SOUTH RIM

TITLE OF SHEETSUB SHEET NO.DESIGNED:

TECH. REVIEW:

CADD:

DATE:

DRAWING NO.A/E FIRM

SHEET

S S /V

COMPANY

SERVICES

GOVERNMENT

JACOBS

S o u th R im \4 D e li v e ry \4

C

A D D e s ig n \G

R C

A \2

\M ic ro s ta ti o n V i

D ra w in g s \S

T R

U C \8

S

D .d g n

C

O M

P L E

T E C

O N

S T

R U

C T

IO

N D

O C

U M

E N

T S

PLAN

1/4"=1'-0"

N

A B C D E

A

87S3001

A

87S3001

10'-0" CLEAR, TYP

EL 6789.50

T.O. CONCRETE

AT WALLS

THICKENED SLAB

11'-0"11'-0"11'-0"11'-0"

44'-0"

TYP

SIM

1"=1'-0"

AT SIM CONDITION

INSIDE FACE ONLY

EMBED "ARMOR" ANGLES,

87S3001

"ARMOR" ANGLES

(4 PLCS), SEE NOTE 1

20" DIA CONC COLUMN

SIM

TYP

EL 6799.50,

T.O. WALL

WALL

CONCRETE

6"

6"

6" 6"

NOTE 3

SLAB ON GRADE,

CONCRETE

0330-003

B

85S3002

B

85S3002

NOTE 2

NOTE 2

CONCRETE WALL, TYP

GENERAL SHEET NOTES

DRAWINGS 01S0001 AND 01S0002.

FOR GENERAL STRUCTURAL NOTES SEE A.

T&B.

REINFORCE SLAB-ON-GRADE WITH #5@12" EW, 3.

DRAWING 06C2001.

FACILITY LOCATION CONTROL POINT. SEE CIVIL 2.

COORDINATE LOCATION WITH MECHANICAL.1.

A FIRTH

FOUNDATION PLAN

AND DETAIL

B CLEGG STRUCTURAL

COMPOST FACILITY

87S1030

0 4 8 12

1/4"=1'-0"

W/ 6" BAR SPACING

INTERSECTIONS

CORNERS AND

TYP @ ALL

SST L3x3x¼