HomeMy WebLinkAbout26 - Instructions - East Gallatin River Stream Bank 3 Restoration
10440142 City of Bozeman 2/25/2026
East Gallatin River Bank 3 Restoration
ADDENDUM FORM
00 91 13 - 1
EAST GALLATIN RIVER BANK 3 RESTORATION
CITY OF BOZEMAN
BOZEMAN, MT
ADDENDUM NO. 1
February 25, 2026
TO: Prospective Bidders
FROM: HDR (Engineer)
Heather Nold, PE
2150 Analysis Drive Suite A
Bozeman, MT 59718-3820
OWNER: City of Bozeman
Suite 200 City Hall 121 No. Rouse Avenue
Bozeman, Montana 59771
SUBJECT: East Gallatin River Bank 3 Restoration
Addendum No. 1
This Addendum is part of the Bidding Documents and the Contract Documents and modifies the original
Bidding Documents dated February 6, 2026, as indicated below. Acknowledge receipt of this Addendum
in the space provided on the Bid Form. Failure to do so may subject the Bidder to disqualification for award
of the associated Contract.
This Addendum consists of 4 pages and the attachments, if any, listed on the last page.
PART 1 - ADDENDUM NO. [1] SEALS AND SIGNATURES
Heather Nold, PE
License No. 91366
The seal and signature to the left applies to the
changes made via this Addendum for the Work in
the following Drawings:
Sheet G002.
Sheet C101
Engineer’s seal and signature does not apply to the documents, or changes thereto, that comprise
Division 00, Bidding and Contracting Requirements, except for revisions to provisions of prior Addenda
that modify the Specifications and Drawings.
10440142 City of Bozeman 2/25/2026
East Gallatin River Bank 3 Restoration
ADDENDUM FORM
00 91 13 - 2
It is a violation applicable laws and regulations governing professional licensing and registration for any
person, unless acting under the direction of the licensed and registered design professional(s) indicated
above, to alter in any way the proposed Specifications, Drawings, and Addenda for this Project.
CHANGES TO PRIOR ADDENDA
None
CHANGES TO INTRODUCTORY INFORMATION
None
CHANGES TO BIDDING REQUIREMENTS
None
CHANGES TO CONTRACTING REQUIREMENTS
None
CHANGES TO SPECIFICATIONS
None
CHANGES TO DRAWINGS
1. Sheet G002- Drawing modified to reflect replacement of damaged and missing sections of pipe,
estimated to be 60 feet. Previously sheet G002 had called out replacement of 20 feet of pipe.
2. Sheet C101- Drawing modified to reflect replacement of damaged and missing sections of pipe,
estimated to be 60 feet. Previously sheet C101 had called out replacement of 20 feet of pipe.
ATTACHMENTS
1. Drawings G002 and C101 (2 sheets)
END OF ADDENDUM NO. 1
POINT NO. 3
CP-03
POINT NO. 2
CP-02
EAST GALLATIN RIVER
CITY OF BOZEMAN
WATER RECLAMATION FACILITY SPRINGHILL ROADSTAGING AREA
REMOVE GABION BASKETS
CONSTRUCT WOODY MATRIX
EXISTING 18" HDPE PIPE AND
HEADGATE (PROTECT-IN-PLACE)
REPLACE DAMAGED AND
MISSING SECTION OF HDPE
PIPE, ESTIMATED 60 FEET
EXISTING 18" HDPE PIPE
(PROTECT-IN-PLACE)
GRAVEL REMOVAL AREA
INSTALL 18" BELL-BELL
COUPLER
CONSTRUCT ROCK RIFFLE CONSTRUCT ENGINEERED
LOG JAM
POINT NO. 1
CP-01
SITE ACCESS
A
LIMITS OF DISTURBANCE
SITE ACCESS
STAGING AREA
REGULATORY FLOODWAY
ZONE AE FLOODPLAIN
LEGEND
ENGINEERED LOG JAM
WOODY MATRIX
EXISTING 18" HDPE
GRAVEL REMOVAL AREA
ROCK RIFFLE
PROPERTY LINE
B
2
ISSUE DESCRIPTION
PROJECT MANAGER
PROJECT NUMBER
0 1"2"FILENAME
SCALE
SHEET
DATE
C
D
A
1 3 4 5 6 7 8
CITY OF BOZEMAN
EAST GALLATIN RIVER
BANK 3 RESTORATION
D. MARCH
10341591
H. NOLD
J. WRIGHT
DESIGNER 1
DRAWN BY
0 FEB 2026 ISSUE FOR BIDc:\pwworking\west02\dms42508\00G002.dwg, 2/24/2026 6:31 PM, WRIGHT, JOELGENERAL
OVERALL SITE PLAN AND SURVEY CONTROL
G002
00G002.dwg
1" = 50'
A 2/25/2026 ADDENDUM #1
NOTES:
1.BACKGROUND IMAGERY REFLECTS SITE
CONDITIONS AS OF 2025. REGION OF WOODY
MATRIX HAS ERODED.
2.TEMPORARY WATER CONTROL STRUCTURE
TO BE CONSTRUCTED OF JERSEY BARRIERS
OR OTHER APPROVED METHODS SUCH THAT
CONSTRUCTION IS NOT WITHIN FLOWING
WATER.
3.CONTRACTOR TO INSTALL BARRIERS AND
SIGNAGE TO RESTRICT PUBLIC ACCESS
DURING CONSTRUCTION.
CITY OF BOZEMAN
ROBINSON CRAIG HOWARD
RIVERSIDE GOLF CLUB
EAST GALLATIN RIVER
BC1
02
BC1022
+
5
0
-0+2
0
0+00
0+20
0+40
0+60
0+80
1+00
1+
2
0
1+
4
0
1+
6
0
1+
8
0
2
+
0
0
2+
2
0
2+
4
04605460
5 460
4
4604 4606
460
6
4607
460
7
4607
4607
4608
4608
460
9
4609
ROCK RIFFLE 2
ROCK RIFFLE 1
OHWM, TYP
L-1
C-1
L-
2
E
C105AC102
AC102ENGINEERED
LOG JAM 2
EXISTING GABION BASKETS
TO BE REMOVED
CONSTRUCT
ENGINEERED LOG JAM DC104ENGINEERED
LOG JAM 1
E
C105
DC104461
0461
0
4615
4607
4608
4609
4
6
1
0
4611
461046094610460946
1
6
461746184607
4608
4610
4608
4
6
0
9460746084617
4618461046104
61
3
4
6
1
0
461
1
46
0
9
46084612461
2
4612
4612
4613CONSTRUCT WOODY MATRIX
C
C102
C
C102
EXISTING 18" HDPE PIPE
(PROTECT-IN-PLACE)
REPLACE DAMAGED AND
MISSING SECTION OF HDPE
PIPE, ESTIMATED 60 FEET
18" BELL-BELL
COUPLER, TYP
A
4595
4600
4605
4610
4615
4620
4625
4595
4600
4605
4610
4615
4620
4625
-0+204606.710+004602.900+204605.410+404606.750+604606.750+804606.201+004606.031+204606.821+404608.201+604606.281+804607.822+004607.852+204607.362+404608.61ROCK RIFFLE 2
TOP OF ROCK CREST
EL 4607.00
ROCK RIFFLE 1
TOP OF ROCK CREST
EL 4609.80
BROKEN DOWN
GABION WALL
TOP OF ROCK
EL 4606.10
EMBED TO
EL 4604.10TOP OF ROCK
EL 4603.30
EMBED TO
EL 4601.30
EXISTING
GROUND
AVULSION CHANNEL ALIGNMENT TABLE
NO.
L-1
C-1
L-2
START
STA.
0+00
0+98.81
1+17.79
START
COORD.
N 541945.581
E 1567636.272
N 541995.311
E 1567721.661
N 541993.155
E 1567739.199
END
STA.
0+98.81
1+17.79
2+50.00
END
COORD.
N 541995.311
E 1567721.661
N 541993.155
E 1567739.199
N 541900.934
E 1567833.932
LEN.
98.81'
18.98'
132.21'
RAD.
NA
14.60'
NA
LINE/CHORD
DIRECTION
N59°47'02"E
S82°59'35"E
S45°46'12"E
OHWM
WOODY MATRIX
ENGINEERED LOG JAM
LEGEND
ROCK RIFFLE
EXISTING 18" HDPE
PIPE
B
2
ISSUE DESCRIPTION
PROJECT MANAGER
PROJECT NUMBER
0 1"2"FILENAME
SCALE
SHEET
DATE
C
D
A
1 3 4 5 6 7 8
CITY OF BOZEMAN
EAST GALLATIN RIVER
BANK 3 RESTORATION
D. MARCH
10341591
H. NOLD
J. WRIGHT
DESIGNER 1
DRAWN BY
0 FEB 2026 ISSUE FOR BIDc:\pwworking\west02\dms42508\01C101.dwg, 2/24/2026 6:31 PM, WRIGHT, JOELCIVIL
AVULSION CHANNEL PLAN AND PROFILE
C101
01C101.dwg
H: 1" = 20'; V: 1" = 5'
A 2/25/2026 ADDENDUM #1
NOTES:
1.MATCH EXISTING GRADE ADJACENT TO
CONSTRUCTED RIFFLES.
2.EXCESS STREAMBED MATERIAL TO BE HAULED
OFF JOBSITE.
3.LOCATIONS OF TIE INS ARE TO BE CONFIRMED BY
FIELD ENGINEER.
4.TIE UPSTREAM END OF WOODY MATRIX TO
EXISTING WILLOW WITHOUT DISTURBING
EXISTING WILLOWS.