RFB949800-01 - Drawings.pdf
PDF 4 MB Posted
- Attached to
- DAS TH Parking Lot Retaining Wall Repairs
- Solicitation number
- RFB949800-01
- Issued by
- Polk County, Iowa
About this file
This is an architectural drawing set for the Iowa Department of Administrative Services related to retaining wall repairs at the Terrace Hill parking lot located at 2300 Grand Avenue, Des Moines, Iowa. The project, identified as RFB 949800-01, involves construction services for parking lot retaining wall repairs with an anticipated commencement date of August 24, 2026 and completion targeted for September 2026. Sealed bids are due July 28, 2026 at 3:00 p.m., with bid opening scheduled for 3:30 p.m. the same day via Microsoft Teams and teleconference. An optional pre-bid meeting is scheduled for July 16, 2026 at 1:00 p.m. at the project site. Technical questions and substitution requests must be submitted by July 21, 2026 at 2:00 p.m. to Issuing Officer Michael Bradbury. The drawing set includes site geometry plans, floor plans, exterior elevations and details, and demolition floor plans prepared by OPN Architects (dated July 2, 2026) and includes structural engineering by Raker Rhodes Engineering and construction management oversight by DCI Group.
The scope of work encompasses demolition of existing concrete curbs, asphalt pavement, concrete masonry unit walls, and associated elements, followed by new construction including a cast-in-place concrete retaining wall with batter configuration, new concrete slab and curb, subdrain installation with filter fabric, topsoil fill and sod, and rail reinstallation. Bid security equal to 5% of the total bid amount is required in the form of a bid bond, cashier's check, or certified check. The project is exempt from Iowa Sales Tax and Davis Bacon Wages do not apply. The State of Iowa seeks to provide opportunities for Certified Targeted Small Businesses in accordance with Chapter 73 of the Code of Iowa. Bidding documents are available from Beeline and Blue at www.beelineandblue.com or (515) 244-1611. Bids must be submitted via the IMPACS Electronic Procurement System, and the Iowa Department of Administrative Services reserves the right to reject any and all bids.
View the file
Other files
| File | Type | Posted |
|---|---|---|
| RFB949800-01 - Addendum #01.pdf | ||
| RFB949800-01 - Bid Form.pdf | ||
| RFB949800-01 - Notice to Bidders.pdf | ||
| RFB949800-01 - Project Manual.pdf | ||
| Addendum #01 Pages and Questions and Answers.html | HTML file | |
| Bid Opening Meeting Link.html | HTML file | |
| IMPACS Electronic Procurement System.html | HTML file | |
| RFB Pre-Bid Meeting Minutes from July 16, 2026.pdf | ||
| Hazardous Building Materials Survey Report.html | HTML file | |
| 1414126-event.pdf |
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Text version
100 Court Ave. Suite 100, Des Moines, IA 50309
P: 515-309-0722 F: 515-309-0725 www.opnarchitects.com
ARCHITECT
OPN ARCHITECTS
100 COURT AVENUE
DES MOINES, IA 50309
DCI GROUP
220 SE 6TH ST, SUITE 200,
DES MOINES, IA 50309
STRUCTURAL ENGINEER
RAKER RHODES ENGINEERING
4717 GRAND AVE
DES MOINES, IA 50312
CONSTRUCTION MANAGER
9498.00 DAS TH PARKING LOT RETAINING WALL REPAIRS
2300 GRAND AVE, DES MOINES, IA 50312
B
ID
S E
T
/0
/2
ARCHITECTURAL DRAWINGS
NUMBER NAME
A001 SITE GEOMETRY PLAN
A101 FLOOR PLANS
A201 EXTERIOR ELEVATIONS AND DETAILS
D101 DEMO FLOOR PLANS
AWOI
SSEFORP
D E
S N
E C I
L
IONAL
A R
C H
I T
E C
T
I hereby certify these plans and specifications were prepared by me or under my direct personal supervision and that I am a duly licensed professional architect under the laws of the state of Iowa.
Signature: ____________________________________
Name:
Iowa Registration No: Renewal Date:
Sheets covered by this seal:
DANIELLE
HERMANN,
AIA
06034 DANIELLE HERMANN, AIA
06034 06/30/2028
Listed As "Architectural"
L
AWOI
RIC
EN
SE
D
PROFESS IONAL
ENG
IN
E
EJOHN
RHODES, PE
18297
I hereby certify this engineering document was prepared by me or under my direct personal supervision and that I am a duly licensed professional engineer under the laws of the state of Iowa.
Signature: ____________________________________
Name:
Iowa Registration No: Renewal Date:
Sheets covered by this seal:
JOHN RHODES, PE
18297 12/31/2026
Listed As "Structural"
SITE FENCING
SIDEWALK
CLOSED
SIGNAGE BY
CONTRACTOR
MOVABLE BARRIER
SIDEWALK CLOSED
SIGNAGE BY
CONTRACTOR
SITE FENCING
sallen Text Box Note seals are not signed for review
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Sheet Name
Key Plan
19181716151413121110987654 20 21321
Sheet Number
PRELIMINARY. NOT FOR CONSTRUCTION.
Sheet Issue Date
OPN Project No.
Owner
All reports, plans, specifications, computer files, field data, notes and other documents and instruments prepared by
OPN Architects, Inc. as instruments of service shall remain the property of OPN Architects, Inc. OPN Architects, Inc.
shall retain all common law, statutory and other reserved rights, including the copyright thereto.
© 2026 OPN Architects, Inc.
100 Court Ave., Suite 100
Des Moines, IA 50309
P: 515-309-0722 www.opnarchitects.com
DCI Group
220 SE 6TH STREET, SUITE 200
DES MOINES, IA 50309
P. 515-244-5043
Project
Construction Manager
Raker Rhodes
4717 GRAND AVENUE
DES MOINES, IA 50312
P. 515-277-0275
Structural Engineer
Snyder & Associates, Inc.
2727 SW SNYDER BOULEVARD
PO BOX 1159
ANKENY, IA
P. 515-964-2020
Civil Engineer
/2
/2
:5
:0
P
M
A001
SITE GEOMETRY PLAN
24853006
BID SET 7/02/2026
9498.00 DAS TH PARKING LOT
RETAINING WALL REPAIRS
2300 GRAND AVE
DES MOINES, IA 50312
1305 EAST WALNUT ST.
3RD FLOOR
DES MOINES, IA 50319
IOWA DEP. OF ADMIN. SERVICES
PROPERTY LINE
CONTRACTOR TO
PROVIDE STRIPPING IF
DAMAGED
Revision Description Date
A201
F1
A201
A1
DEMO EXISTING CURB AND ASPHALT
OVER CONCRETE PAVEMENT
EXISTING SHRUBS AND
MULCH TO BE REMOVED
DEMO EXISTING ASPHALT
AND CONCRETE PAVEMENT
FOR NEW CONCRETE WALL
AND FOUNDATION
DEMO EXISTING CONCRETE
CURB
DEMO EXISTING CMU WALL
AND PIER
EXISTING RAILING TO BE
REMOVED AND RESET PER
DETAILS L1/A201 AND L5/A201
REMOVE DRIVE TO FRONT
OF CURB
EXISTING CONCRETE CURB
EXISTING CURB
AND SIDEWALK TO
REMAIN
PROPERTY LINE
DO NOT DEMO ANY ITEMS THAT ARE
NOT ON STATE OF IOWA'S PROPERTY
SAW CUT EXISTING
PAVEMENT ALONG
PROPERTY LINE
DEMO EXISTING CURB
EXISTING PAVEMENT TO
REMAIN OUTSIDE OF
THE PROPERTY LINE
EXISTING STONE RETAINING
WALL TO REMAIN
EXISTING SIDEWALK TO BE
REMOVED
EXISTING UTILITIES TO
REMAIN
NO WORK IN THIS AREA
PROTECT AREA DURING
CONSTRUCTION
PREP THIS AREA FOR NEW SOD
CONTRACTOR TO PROVIDE
STRIPING IF DAMAGED - SEE
A001 FOR EXISTING LOCATIONS
SALVAGE EXISTING BRICK
AS REQUIRED FOR
INSTALLATION BY
CONTRACTOR FOR CURB
INSTALLATION
EXISTING CURB TO REMAIN
EXISTING SIDEWALK TO REMAIN
GENERAL NOTES
1. DIMENSIONS ARE MEASURED FACE-
OF-FINISH TO FACE-OF-FINISH OR
ROUGH MASONRY OPENING UNLESS
NOTED OTHERWISE - TYPICAL FOR ALL
DRAWINGS.
2. FIELD VERIFY ALL DIMENSIONS AND
EXISTING CONDITIONS - TYPICAL FOR
ALL DRAWINGS.
3. IN THE EVENT OF A DISCREPANCY
BETWEEN ARCHITECTURAL AND
CONSULTANT DRAWINGS, NOTIFY
ARCHITECT IMMEDIATELY PRIOR TO
COMMENCING WORK - TYPICAL FOR
ALL DRAWINGS.
N
1/4" = 1'-0" A1
FLOOR PLAN - DEMO
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Sheet Name
Key Plan
19181716151413121110987654 20 21321
Sheet Number
PRELIMINARY. NOT FOR CONSTRUCTION.
Sheet Issue Date
OPN Project No.
Owner
All reports, plans, specifications, computer files, field data, notes and other documents and instruments prepared by
OPN Architects, Inc. as instruments of service shall remain the property of OPN Architects, Inc. OPN Architects, Inc.
shall retain all common law, statutory and other reserved rights, including the copyright thereto.
© 2026 OPN Architects, Inc.
100 Court Ave., Suite 100
Des Moines, IA 50309
P: 515-309-0722 www.opnarchitects.com
DCI Group
220 SE 6TH STREET, SUITE 200
DES MOINES, IA 50309
P. 515-244-5043
Project
Construction Manager
Raker Rhodes
4717 GRAND AVENUE
DES MOINES, IA 50312
P. 515-277-0275
Structural Engineer
Snyder & Associates, Inc.
2727 SW SNYDER BOULEVARD
PO BOX 1159
ANKENY, IA
P. 515-964-2020
Civil Engineer
/2
/2
:5
:0
P
M
D101
DEMO FLOOR PLANS
24853006
BID SET 07/02/2026
9498.00 DAS TH PARKING LOT
RETAINING WALL REPAIRS
2300 GRAND AVE
DES MOINES, IA 50312
1305 EAST WALNUT ST.
3RD FLOOR
DES MOINES, IA 50319
IOWA DEP. OF ADMIN. SERVICES
A14
A201
A201
A1 1 1/4" STEEL PIPE, PAINT HPC-1
NEW BATTER CAST IN PLACE
CONCRETE WALL
NEW 6" CONCRETE SLAB
NEW CONCRETE CURB
NEW TOPSOIL FILL AND SOD TO
BLEND TO PROPERTY LINE
ELEVATION
NEW CURB
EXISTING CONCRETE CURB
TO REMAIN
PROPERTY LINE
7'-0"
NEW CONCRETE APPROACH
22 FEET OF 4" SUBDRAIN
WRAPPED WITH FILTER FABRIC
WITH 0.5% SLOPE TO SINGLE
OUTLET
DO NOT DEMO ANY ITEMS THAT ARE
NOT ON STATE OF IOWA'S PROPERTY
A201
L16
EXISTING CURB TO REMAIN
4" SUBDRAIN OUTLET THROUGH
WALL, 6" ABOVE FINAL GRADE
EXISTING PAVEMENT TO REMAIN
EXISTING STONE RETAINING
WALL TO REMAIN
PROVIDE THICKENED CURB TO
RESOLVE TO THE NEW CURB
EXISTING CURB TO REMAIN
NEW CURB JOINT IN CONCRETE
PROVIDE THICKENED CURB TO
RESOLVE THE EXISTING CURB
EXISTING UTILITIES TO
REMAIN
EXISTING HOT-MIX
ASPHALT TO REMAIN
LEAVE TOPSOIL EXPOSED IN
THIS AREA
4'-0"
PLANTINGS AND METAL EDGING
BY OTHERS
NEW SIDEWALK
CJ
EQ EQ
EQ EQ
NO WORK IN THIS AREA
RESET EXISTING BRICK STREET THAT HAS
BEEN DISTURBED BY CONSTRUCTION
TRANSITION AT CURB
SEE P1/A101
EJ
CJ
CJ
CJ CJ
EJ
CJ
SHOW CJS FOR NEW CURB
NEW CURB JOINT IN CONCRETE
SEALANT BETWEEN CONCRETE
& HMA
KEY
NEW SOD
EXISTING PARKING LOT
SURFACE
EXPOSED TOP SOIL
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20 21
Sheet Name
Key Plan
19181716151413121110987654 20 21321
Sheet Number
PRELIMINARY. NOT FOR CONSTRUCTION.
Sheet Issue Date
OPN Project No.
Owner
All reports, plans, specifications, computer files, field data, notes and other documents and instruments prepared by
OPN Architects, Inc. as instruments of service shall remain the property of OPN Architects, Inc. OPN Architects, Inc.
shall retain all common law, statutory and other reserved rights, including the copyright thereto.
© 2026 OPN Architects, Inc.
100 Court Ave., Suite 100
Des Moines, IA 50309
P: 515-309-0722 www.opnarchitects.com
DCI Group
220 SE 6TH STREET, SUITE 200
DES MOINES, IA 50309
P. 515-244-5043
Project
Construction Manager
Raker Rhodes
4717 GRAND AVENUE
DES MOINES, IA 50312
P. 515-277-0275
Structural Engineer
Snyder & Associates, Inc.
2727 SW SNYDER BOULEVARD
PO BOX 1159
ANKENY, IA
P. 515-964-2020
Civil Engineer
/2
/2
:5
:0
P
M
A101
FLOOR PLANS
24853006
BID SET 07/02/2026
9498.00 DAS TH PARKING LOT
RETAINING WALL REPAIRS
2300 GRAND AVE
DES MOINES, IA 50312
1305 EAST WALNUT ST.
3RD FLOOR
DES MOINES, IA 50319
1/4" = 1'-0" A1
FLOOR PLAN -NEW CONSTRUCTION
Revision Description Date
1" = 1'-0" P1
PHOTO - TRANSITION AT CURB
ALIGN
ALIGN
REMOVE AND SALVAGE
EXISTING RAILING
EXISTING BATTER CONCRETE WALL TO REMAIN
DEMO EXISTING CMU WALL
EXISTING FOUNDATION OF PIER
TO REMAIN BELOW 1'-6" GRADE
REMOVE EXISTING CMU PIER
129.50
TOP OF CONCRETE NEAR
WALL AND SIDEWALK,
ELEVATION OF SIDE VARIES.
132.00
TOP OF WALL
133.25
TOP OF WALL
134.60
TOP OF WALL
A14
A201
1 1/4" STEEL PIPE, PAINT HPC-1
EXISTING RAILING TO BE
REMOVED AND RESET
PER DETAILS L1/A201
AND L5/A201
C J
C J 6"
6"
4" SUBDRAIN OUTLET WITH CAP
THROUGH WALL, 6" ABOVE FINAL
GRADE
M
IN
VERIFY BOTTOM ELEVATION
OF EXISTING FOUNDATION
DURING DEMOLITION
124.50
BOTTOM OF NEW FOUNDATION
129.50
TOP OF CONCRETE NEAR
WALL AND SIDEWALK,
ELEVATION OF SIDE VARIES.
132.00
TOP OF WALL
133.25
TOP OF WALL
134.60
TOP OF WALL
DURING PREVIOUS WORK WEST OF
THIS PARKING LOT, GROUND WATER
WAS AN ISSUE DURING EXCAVATION
AND FOOTING POURS, PROVIDE A
DEWATERING PLAN SO ADDITIONAL
OVER EXCAVATION AND FILL WILL NOT
BE REQUIRED
L16
A201
MATCH EXISTING
DIMENSION FOR NEW
RAIL
E Q
E Q
6'-8" 8'-0"
CONCRETE BASE AT EAST POLE
IS LOOSE
CONTRACTOR SHALL BE
RESPONSIBLE FOR
MODIFICATIONS TO EXISTING
RAIL AS CONCRETE WILL
NEED REMOVED, CLEANED
UP, PIPE CUT DOWN IN
LENGTH
STRUCTURAL
#5 REBAR @ 18" O.C. BOTH
DIRECTIONS
STRUCTURAL
BATTER CIP CONCRETE WALL
STRUCTURAL
6" CONCRETE SLAB WITH #4
REBAR AT 18" O.C. BOTH
DIRECTIONS
STRUCTURAL FILL
STRUCTURAL
12" CONCRETE MAT
FOUNDATION
GRANULAR FILL AT 2:1
SLOPE
STRUCTURAL
#7 REBAR @ 18" O.C. BOTH
DIRECTIONS
TOPSOIL FILL
HEIGHT VARIES
HEIGHT VARIES
BASED ON SLOPE
4'-0"
CONCRETE CURB TO BLEND
INTO EXISTING
EXISTING
MATCH
EXISTING
MATCH
PROVIDE TOPSOIL TO
BOTTOM OF CONCRETE
CURB WITH 20% SAND BY
VOLUME FOR FUTURE
PLANTINGS OF VINES.
CONTRACTOR TO PROVIDE
WEED BARRIER AND 3" OF
RIVER ROCK
BOLT RAIL TO OUTSIDE FACE
OF WALL
4" DRAIN TILE
WITH FILTER FABRIC
EXTEND DRAIN LINE
THROUGH WALL
A201
L1
PLANTING BY OTHERS
MATCH EXISTING BATTER
WALL BEYOND
2.19 DEGREE SLOPE MAINTAINED,
VERIFY AT THE EXISTING
CONCRETE WALL
PLANTING BY OTHERS
9"
FILTER FABRIC WRAP
OVER GRANULAR FILL
NEW BATTER 8"
CONCRETE WALL
1 1/4" STEEL PIPE WITH
HPC-1
WELD 1/4" X 8" X 8"
STEEL PLATE TO
PIPE WITH HPC-1
1 1/4" STEEL PIPE
WITH HPC-1
WELD 1/4" X 8" X 8"
STEEL PLATE TO PIPE
WITH HPC-1
5/8" DIA X 5" WEDGE
ANCHORS PROVIDE FOUR
FOR EACH VERTICAL RAIL
/4
/2
/4
2 1/4" 2 1/4"
EXISTING CONCRETE
WALL TO REMAIN
STRUCTURE
DRILL, EPOXY, #5
DOWELS AT 18" O.C.
8" DEEP INTO EXISTING
WALL
ADD 1/2" X 1/2" FOR
INSTALLATION OF SEALANT
ALIGN THE NEW THICKENED
CONCRETE WALL WITH FACE
OF EXISTING CONCRETE WALL
CENTER NEW BATTER
WALL ON EXISTING
BATTER CONCRETE WALL
MATCH EXISTING SLOPE AND
ANGLE
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Sheet Name
Key Plan
19181716151413121110987654 20 21321
Sheet Number
PRELIMINARY. NOT FOR CONSTRUCTION.
Sheet Issue Date
OPN Project No.
Owner
All reports, plans, specifications, computer files, field data, notes and other documents and instruments prepared by
OPN Architects, Inc. as instruments of service shall remain the property of OPN Architects, Inc. OPN Architects, Inc.
shall retain all common law, statutory and other reserved rights, including the copyright thereto.
© 2026 OPN Architects, Inc.
100 Court Ave., Suite 100
Des Moines, IA 50309
P: 515-309-0722 www.opnarchitects.com
DCI Group
220 SE 6TH STREET, SUITE 200
DES MOINES, IA 50309
P. 515-244-5043
Project
Construction Manager
Raker Rhodes
4717 GRAND AVENUE
DES MOINES, IA 50312
P. 515-277-0275
Structural Engineer
Snyder & Associates, Inc.
2727 SW SNYDER BOULEVARD
PO BOX 1159
ANKENY, IA
P. 515-964-2020
Civil Engineer
/2
/2
:5
:0
P
M
A201
EXTERIOR ELEVATIONS AND
DETAILS
24853006
BID SET 07/02/26
9498.00 DAS TH PARKING LOT
RETAINING WALL REPAIRS
2300 GRAND AVE
DES MOINES, IA 50312
1305 EAST WALNUT ST.
3RD FLOOR
DES MOINES, IA 50319
1/4" = 1'-0" F1
EXTERIOR ELEVATION - SOUTH -DEMO
1/4" = 1'-0" A1
EXTERIOR ELEVATION - SOUTH - NEW CONSTRUCTION
1" = 1'-0"
A14
SECTION DETAIL - RETAINING WALL - NEW CONSTRUCTION
IOWA DEP. OF ADMIN. SERVICES
3" = 1'-0" L1
SECTION DETAIL - RAIL CONNECTION
3" = 1'-0"
L5
ELEVATION - RAIL CONNECTION
3" = 1'-0" L16
PLAN DETAIL - EXISTING TO NEW RETAINING WALL
| Sheets |
| A001 - SITE GEOMETRY PLAN |
| A101 - FLOOR PLANS |
| A201 - EXTERIOR ELEVATIONS AND DETAILS |
| D101 - DEMO FLOOR PLANS |
| G000 - COVER SHEET |
File details come from the government source that posted it. Updated .