11th Street Steps & Grove Terrace Retaining Wall ProjectTO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: 11th Street Steps & Grove Terrace Retaining Wall Reconstruction Project
CIP: 3002072 -Grove Terrace Retaining Wall
DATE: May 12, 2009
City Engineer Gus Psihoyos is recommending acceptance of the 11t" Street Steps and
Grove Terrace Retaining Wall Reconstruction Project, as completed by Portzen
Construction, Inc. in the final contract amount of $635,536.59, which is a 7.9% increase
from the original contract in the amount of $589,175.50.
The additional cost is primarily due to the need to use new limestone rather than
salvaged. limestone.. It was discovered_when the wall was. taken .down that. the
limestone facing was primarily a facade layer and was not suitable in most cases to re-
use in the reconstruction of the retaining wall.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
s ~tl._
ichael C. Van Milligen
MCVM/jh
Attachment
cc: Barry Lindahl, City Attorney
Cindy Steinhauser, Assistant City Manager
Gus Psihoyos, City Engineer
THE CITY C)F UbUgU
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TO: Michael C. Van Milligen, City Manager,..-~~~-~--~z,~
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FROM: Gus Psihoyos, City Engineer ;~~~ I `~~ °~
DATE: May 12, 2009
SUBJECT: 11t" Street Steps & Grove Terrace Retaining Wall Reconstruction Project
CIP: 3002072 -Grove Terrace Retaining Wall
INTRODUCTION
The enclosed resolution provides for the acceptance of the construction contract for the
11t" Street Steps & Grove Terrace Retaining Wall Reconstruction Project.
BACKGROUND
In July, 2008, the City Council awarded the 11t" Street Steps & Grove Terrace Retaining
Wall Reconstruction Project to Portzen Construction, Inc. of Dubuque, Iowa.
The project included the installation of concrete backfill and geofoam blocks to limit the
stresses on the new retaining wall and to allow the reuse of a significant portion of the
existing limestone block. The project also included installation of reinforced concrete
over the .existing 11t" Street stairs arch to stabilize the arch. The section of Grove
Terrace around the stairs was reconstructed with 7" concrete pavement with integral
curb and gutter. The rest of Grove Terrace was reconstructed with asphalt pavement
and concrete curb and gutter. The existing 8" sanitary sewer was reconstructed with two
sanitary manholes being replaced.
The 11 t" Street retaining wall abutting the 11 t" Street steps was reconstructed with
salvaged and new limestone blocks. The stairs were partially reconstructed with
wrought iron hoop railing at the top of the stairs, with the remaining handrail refurbished.
The installation of a new historic street light will help illuminate the stairway and provide
for roadway lighting at the top of the stairs.
DISCUSSION
The 11t" Street Steps & Grove Terrace Retaining Wall Reconstruction Project was
completed by Portzen Construction, Inc., in the final contract amount of $635,536.59,
which is a 7.9% increase from the original contract in the amount of $589,175.50.
This additional cost is primarily due to the need to use new limestone rather than
salvaged limestone. It was discovered when the wall was taken down that the limestone
facing was primarily a fagade layer and was not suitable in most cases to re-use in the
reconstruction of the retaining wall. The original wall was constructed with large stones
on the outside that were irregularly shaped and then much smaller rock pieces were
piled behind the large outside blocks to form the wall.
RCOIIAMENDATION
I recommend that the City Council accept the improvements and establish the final
contract at $635,536.59.
BUDGET" IMPACT
The estimate of probable cost for the 11t" Street Steps & Grove Terrace Retaining Wall
Reconstruction Project is as follows:
Ftir~ ®vvarrl
Construction Contract
Contingency
Engineering Design
Construction Engineering & Inspection
The project funding summary is as follows:
CIP No. Fund Description
Historic Preservation Funds
3002072 Grove Terrace Retaining Wall
Total Project Funding
ACTION TO E TAKEN
Fund Amount
$ 90,000
614,675.25
$ 704,675.25
The City Council is requested to adopt the attached resolution to accept the
improvements and to authorize the payment of the contract amount of $635,536.59 to
Portzen Construction, Inc. for the 11t" Street Steps & Grove Terrace Retaining Wall
Reconstruction Project.
$ 589,175.50
76,341.38
Final
$ 635,536.59
0
45,800.75
87,792.58 23,337.91
~ 753,309.46 $ 704,675.25
Prepared by Robert Schiesl, Assistant City Engineer
cc: Jenny Larson, Budget Director
Jon Dienst, Civil Engineer
RESOLUTION NO. 152-09
ACCEPTING THE 11TH STREET STEPS & GROVE TERRACE RETAINING WALL
RECONSTRUCTION PROJECT AND AUTHORIZING THE PAYMENT OF THE
CONTRACT AMOUNT TO THE CONTRACTOR
Whereas, the Public Improvement Contract for the 11th Street Steps & Grove
Terrace Retaining Wall Reconstruction Project (the Project) has been completed and
the City Engineer has examined the work and filed a certificate stating that the Project
has been completed according to the terms of the Public Improvement Contract and
that the City Engineer recommends that the Project be accepted; and
NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY
OF DUBUQUE, IOWA:
Section 1. The recommendation of the City Engineer is approved and the Project
is hereby accepted.
Section 2. The Finance Director is hereby directed to pay to the Contractor from
the Grove Terrace Retaining Wall Capital Improvement Project and Historic
Preservation Funds appropriation for the contract amount of $635,536.59 less any
retained percentage provided for therein as provided in Iowa Code chapter 573, and to
pay such retainage only in accordance with the provisions of Iowa Code chapter 573.
Passed, approved and adopted this 18th day of May, 2009.
Roy D. Buol, Mayor
Attest:
Jeanne F. Schneider, CMC, City Clerk
CITY ENGINEER'S CERTIFICATE OF FINAL COtViPLET°ION OF TH 11T" STR T
STEPS GROVE TERRACE RETAINING 1NALL RECONS°TRl1CT'ION PROJECT
The undersigned City Engineer of the City of Dubuque, Iowa, hereby certifies that
he has inspected the 11t" Street Steps & Grove Terrace Retaining Wall Reconstruction
Project, that the Project has been performed in compliance with the terms of the Public
Improvement Contract, and that the total cost of the completed work is $704,675.25.
Dated this ~ ~ day of , 2009.
ago
City Engineer
~'
Filed in the office of the City Clerk on the,~',w ~ ~ day ofd _ , 2009., ,
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~ ~ , ,~
~e F. Schneider, CMC, City Clerk
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City of Dubuque ~ Engineering Division
Council Final Payment Form
PARTIAL PAYMENT NO: COUNCIL FINAL
PROJECT NAME: 11th STREET STEPS 8 GROVE TERRACE RETAINING WALL
RECONSTRUCTION PROJECT
DATE: May 12, 2009
CONTRACTOR: PORTZEN CONSTRUCTION, INC. CONTRACT AMOUNT: $589,175.50
BID ITEM DESCRIPTION UNIT UN T OST OTO DATE AM TO DATENED
Mobilization & Miscellaneous
LS $ 50,000.00 1.00 $ 50,000.00
GROVE TERRACE RETAINING WALL
1 Base Course Backfill TONS $ 15,00 1276.38 $ 19,145.70
2 Concrete Backfill CY $ 190.00 433.50 $ 82,365.00
3 Geofoam Backfill CY $ 165.00 291.00 $ 48,015.00
4 Limestone (Salvaged) SF $ 30.00 1290.76 $ 38,722.80
5 Limestone (New) SF $ 48.00 1421.05 $ 68,210.40
6 4" Perforated CPE Draintile LF $ 9.00 247.00 $ 2,223.00
7 4" Perforated CPE Risers LF $ 20.00 109.00 $ 2,180.00
8 4" CPE Outlet with Bar Guard EA $ 125.00 3.00 $ 375.00
9 Structural Concrete (Barrier Rail) CY $ 300.00 $ -
10 TL-2 Barrier Rail Connection Hardware EA $ 150.00 $ -
11 Wrought Iron Hoop Railing LF $ 100.00 164.30 $ 16,430.00
11th STREET RETAINING WALL
12 Removal of PCC Steps LS $ 10,000.00 1.50 $ 15,000.00
13 Engineered Backfill TONS $ 17.50 246.96 $ 4,321.80
14 Drainage Course Backfill TONS $ 30.00 13.95 $ 418.50
15 Waterproofing Membrane SY $ 50.00 85.56 $ 4,278.00
16 4" Perforated CPE Drain Tile LF $ 9.00 180.00 $ 1,620.00
17 Limestone (Salvaged) SF $ 30.00 97.83 $ 2,934.90
18 Limestone (New) SF $ 70.00 1029.68 $ 72,077.60
19 Tuckpoint and Repair Existing Wall LF $ 40.00 $ -
20 Repair Existing Tie Rods EA $ 200.00 $ -
21 TL-2 Barrier Rail Connection Hardware EA $ 150.00 $ -
22 Wrought Iron Hoop Railing LF $ 100.00 117.70 $ 11,770.00
23 PCC Steps (Treads) LF $ 80.00 286.00 $ 22,880.00
24 PCC Steps (Landings) SF $ 10.00 169.34 $ 1,693.40
25 Stair Railing (Replace) LF $ 75,00 76.60 $ 5,745.00
26 Stair Railing (Repair) LF $ 75.00 $ -
SANITARY SEWER
27 8" DIP Sanitary Sewer LF $ 35.00 152.60 $ 5,341.00
28 48" I,D. Manhole Base EA $ b50.00 2.00 $ 1,100.00
29 48" I.D. Manhole Sidewall VF $ 150.00 12.00 $ 1,800.00
30 Manhole Frame and Cover EA $ 500.00 2.00 $ 1,000.00
31 Select Trench Backfill, Sanitary LF $ 10.00 152.60 $ 1,526.00
PAVING
32 Removal of Pavement SY $ 10.00 790.00 $ 7,900.00
33 Base Course TONS $ 15.00 797.85 $ 11,967.75
34 7" PCC Pavement w/Integral Curb SY $ 42.00 615.41 $ 25,847.22
35 PCC Curb & Gutter LF $ 26.00 9.60 $ 249.60
36 5" HMA Pavement SY $ 32.00 194.78 $ 6,232.96
37 Structural Concrete {Slab & Abutment) CY $ 1,000.00 72.50 $ 72,500.00
38 Payment Markings EA $ 275.00 $ -
39 Manhole Adjustment EA $ 175.00 2.00 $ 350.00
40 Neenah 101-B Frame and Grate EA $ 650.00 $ -
41 Traffic Control LS $ 2,063.00 1.00 $ 2,063.00
42 Regrade, Seed, Fertilize, Mulch ACRE $ 12,000.00 $ -
ELECTRICAL
43 Connection to Existing Electrical Service EA $ 1,200.00 1.00 $ 1,200.00
44 Conduit, 2" PVC, Schedule 40 LF $ 12.00 171.40 $ 2,056.80
45 Electric Cable, #10 XHHW LF $ 2.50 519.00 $ 1,297.50
46 Ground Wire, #6 Bare Copper LF $ 3.OD 173.00 $ 519.00
47 install Historic Streetlight inc. Foundation EA $ 2,500.00 2.00 $ 5,000.00
TOTAL AMOUNT EARNED TO DATE: ~ $ 618,356.93
CHANGE ORDER -EXTRA WORK ITEMS
Concrete footing for 11th Street Stairs Wall SF $22.00 97.83 $ 2,152.26
18" RCP storm Sewer LF $45.OD 77.OD $ 3,465.00
Storm Sewer Manhole, Rebuild chimney LS
~ $1,500.00 1.00 $ 1,500.00
Add Hanhole Each $350.00 1.00 $ 350.00
8"x4" Sanitary Sewer Wye Each $350.00 2,00 $ 7DD.00
4" SDR 35 PVC Sanitary Sewer Lateral LF $45.00 10.50 $ 472.50
Removal of Existing Drain Tile (Labor) Hrs $50.00 4.D0 $ 200.00
Removal of Existing Drain Tile (Truck & Driver) Hrs $75.00 2.00 $ 150.00
4" Sidewalk SF $5.00 338.88 $ 1,694.40
Topsoil, Furnish & Install CY $35.00 108.00 $ 1,08D.00
Milbank Control Cabinet, Electric LS $4,320.00 1.00 $ 4,320.00
Sod, Grove Terrace Parkway SY $5.50 147.00 $ 808.50
Hydro Seed, South Afley SY $1.75 82.00 $ 143.50
Hydro Seed, Stairs 8, Arch SY $1.75 82.00 $ 143.50
TOTAL AMOUNT EARNED TO DATE -CHANGE ORDERS: $ 97,179.66
TOTAL AMOUNT EARNED TO DATE: $ 635,536.59
TOTAL DUE CONTRACTOR: $ fi35,536.59
ENGINEERING: ~ $ 69,138.66
TOTAL CONSTRUCTION COST: $ 704,675.25
CERTIFICATE OF THE CITY MANAGER:
i hereby certify that the above statement shows in detail the correct amount o~ al! work required to complete the above improvement.
r
APPROVED: ~,.~...~.... _ _.
Michael Van Milligen, CityMana`ger~n
City of~D,L(ybu e, pwa
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Gus Psihoyos, City Engineer
City of Dubuque, Iowa
CERTIFICATE OF TWE CONTRACTOR
The undersigned, Portzen Construction, Inc. contractor for the above improvement, does
hereby accept the above "Total Due Contractor", as full'~ettieme~ for a11,41aims,for said improvement.
CONTRACTOR: ~ f~: ~/~ ~' ~~'' '•/~~/%~- L,-„~~
gy_ Michael Portzen
TITLE: President
DATE: May 13 , 2009