HomeMy WebLinkAbout03-12-07 Item 4F, Arnt Construction Change Order 3
~
~HILLS
Request for Council Action
Prepared By:
Dept.:
Council Mtg. Date:
Final Action Needed By:
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Engineering
3/12/07
3/12/07
Nlt____
Agenda Item:
4F
Budgeted Amount:
Actual Amount:
Funding Source:__
$1.764,000
$2,207,591,62
Various
to Approve Change Order #3 to Amt Construction in the Amount of $106,477.46 for the 2006 PMP Project- Ridgewood Neighborhood.
Change Order #3 to Arnt Construction in the Amount of $106,477.46 for the 2006 PMP Projectp Ridgewood Neighborhood.
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Memo from Finance Director Sue Iverson
No.:
No.:
Recommendation:
Recommendation:
Change Order #3
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The following breakdown shows the funding sources and amounts for Change Order #3:
PIR Fund: $62,629.44
Storm Sewer: $17,585.26
Watermain: $10,892.59
Sanitary Sewer: $15,370.17
The revised contract amount is $1,809,791.62. The anticipated final construction cost (once spring work is completed) is $1,774,025.91.
~
EN HILLS
MEMORANDUM
DATE:
March 8, 2007
AGENDA ITEM 4F
TO:
Mayor and City Council
Michelle Wolfe, City Administrator
Kristine Giga, Civil Engineer~
FROM:
SUBJECT:
2006 PMP Improvement Project- Ridgewood Neighborhood
Change Order #3
BACKGROUND
On June 12, 2006, the City Council awarded the 2006 PMP Improvement Project in the
Ridgewood Neighborhood to Amt Construction Company, Inc. of Hugo, Minnesota for a total
contract amount of $1,808,584.32, Change Order #1 and Change Order #2 have been approved
by Council resulting in the current contract amount of$I,703,314.16, The Change Order request
before Council includes payment for additional work and/or materials incorporated into the
project. The explanation of the additional work/items is summarized below, and described in
detail in the attachment to Change Order #3,
DISCUSSION/FINANCIAL IMPLICA nONS
Original Contract amount (based on estimated quantities):
$1,808,584.32
Change Order # I (approved by Council 6/12/06)
Roadway
Storm
Watermain
Total
$ (12,269.40)
$ (45,422.76)
$ (60.998.00)
$ (I 18,690.1 6)
$ 1,689,894.16
Revised Contract Amount after e.O. #1:
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2006 PMP
3/8/2007
Page 2
Change Order #2 (approved by Council 7/31/06)
Watermain
$ 13,420,00
$ 1,703,314.16
Revised Contract Amount after C.O. #2:
Change Order #3
Roadway
Storm
Watermain
Sanitary Sewer
Total
$ 62,629.44
$ 17,585.26
$ 10,892.59
$ 15.370.17
$ 106,477.46
$ 1,809,791.62
Revised Contract Amount including C.O. #3:
Estimated final amount due (once spring work is completed)
$ 1,774,025.91
This represents an increase in the contract of 5.0% above the awarded revised contract amount
that included Change Order #1. The cost increases are a result of actual contract quantities being
greater than estimated and additional work needed to complete the project. The majority of the
increases were the result of changes due to unanticipated conditions in the field and concerns
expressed by residents throughout the construction of the project. Decisions regarding these
changes needed to be made while the work was being completed, not allowing for the processing
of a change order prior to the execution ofthe work. While the total change order amount for
this project was $106,477.46, the anticipated actual increase to the contract, once spring work is
completed and paid for, is $84,131.75. This was the result of other project quantities being less
than what was anticipated. The following table shows a breakdown of the construction costs at
various stages of the project.
Feasibility Engineer's Contractor's Revised Bid Revised Amount Anticipated
Fund Report Estimate Bid (ind, e.O. #1) (incl. e.O. #2&3) Final Amount
PIR $932,203.39 $978,703.00 $999,105.91 $986,836.51 $1,049,465.95 $1,038,388.23
Surface water $347,457,63 $410,349.01 $499,788.41 $454,365.65 $471,950,91 $474,237.32
Water $135,593.22 $188,958.00 $240,016.00 $179,018.00 $203,330.59 $181,212.19
Sanitary Sewer $69,491.53 $77,195.00 $69,674.00 $69,674.00 $85,044.17 $80,188.17
Total $1,484,745,76 $1,655,205,01 $1,808,584.32 $1,689,894.16 $1,809,791.62 $1,774,025.91
The increased amount from the amended 2006 budget (based on the revised bid) to anticipated
final amount is as follows:
PIR fund: $51,551.72
Surface water fund: $19,871.67
Water fund: $ 2,194.19
Sanitary sewer fund: $10,514.17
2006 PMP
3/8/2007
Page 3
Finance Director Iverson has indicated that all funds, except for the Surface water fund, have
sufficient monies available to cover these increases. She also indicated that the monies needed
for the increase to the storm water costs could be transferred from the PIR Fund, as stated in her
memo, which has been attached.
RECOMMENDED COUNCIL ACTION
At this time, staff recommends approval of Change Order #3 in the amount of$106, 477.46 to
Amt Construction for the 2006 PMP Project- Ridgewood Neighborhood.
CHANGE ORDER NO.3
URS Ccpy
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Project: 2006 Pavement Management Program
URS Job No.: 31809837
Owner:
City of Arden Hills
1245 West Highway 96
Arden Hills. MN 55112
Date of Issuance: February 26, 2007
Contractor:
Arnt Construction, Inc,
P,O, Box 549
Hugo, MN 55038
Eugineer: URS Corporation
Thresher Square Building
700 Third Street South
Minneapolis, MN 55415
Description of Chanl!:e Order:
The contract is hereby modified to include additional quantities and additional work items for Roadway, Storm Drainage,
Watermain, and Sanitary Sewer associated with the 2006 Pavement Management Program, The Contract Items where
additional quantities were needed to complete construction include; subgrade excavation, select granular borrow,
aggregate base CL 5, modular block retaining wall, raingarden excavation, special walk, and sodding, Also, during
construction, there were modifications to proposed storm sewer, existing sanitary sewer, and existing watermain that were
deemed necessary due to unforeseen field conditions, More detail regarding these Contract Items and the utility
modifications for this Change Order is provided in the Attachment to Change Order No, 3,
Chanl!:e Order Summary:
Schedule A - Roadway
Schedule B - Storm Drainage
Schedule C - Watermain
Schedule D - Sanitary Sewer
Total Contract Modification for Change Order No.3
$62,629,44
$17,585.26
$10,892.59
$15.370.17
$106,477.46
Contract Summary:
Original Contract Amount:
Contract Modifications to Date:
Current Contract Amount:
Contract Modifications Change Order No.3:
Revised Contract Amount:
$1,808,584.32
($105,270.16)
$1,703,314.16
$106.477.46
$1,809,791.62
There will be no changes in the Contract time as a result of these revisions,
Agreed to:
By:
By:
Arnt Construction, Ioe.
Approved By:
City of Arden Hills
Attachment to Change Order No.3
Owner:
Contractor:
Project:
City of Arden Hills
Amt Construction Company, Inc.
2006 Pavement Management Program
Description of changes:
The Contract modifications associated with Change Order No, 3 include aspects of Roadway, Storm Drainage, Watermain,
and Sanitary Sewer construction activity. There are Contract Items where additional quantities were needed to complete
construction. The Roadway items include; sub grade excavation, select granular borrow, aggregate base CL 5, modular
block retaining wall, and special walk, The Storm Drainage items where additional quantities were needed include;
raingarden excavation and sodding. There were also modifications to proposed storm sewer, existing sanitary sewer, and
existing watermain that were deemed necessary due to unforeseen field conditions and those will be paid for as lump sum
items. Another item specified to be part of the Roadway Schedule is the bituminous density calculation, The density of the
pavement is tested and either a bonus or a deduction is imposed based on the results. Details for each item are summarized
below:
Schedule A - Roadway
Many of the work items within the Roadway portion of the project, as detailed below, are related. The sub grade excavation
quantity is included in the project as a contingency item in the event that any unsuitable soil needed to be removed for
utility or roadway construction. Three separate occurrences during construction contributed to the subgrade excavation
quantity listed below; unsuitable pockets discovered during storm sewer construction (1200 CY total), excavation of
unsuitable material behind retaining walls on Ridgewood Road and Siems Court (1192 CY total), and the removal of
aggregate base class 5 materials placed in response to resident requests for access road maintenance during construction
(1082 CY total).
The first subgrade excavation occurrence was during storm sewer construction, Four to five foot deep pockets of
unsuitable soils were discovered at the low point of Ridgewood Road adjacent to the wetland, on Siems Court south of
Lake Johanna Boulevard, on Arden Place near the intersection of Ridgewood Road, and on Lake Johanna Boulevard west
of Siems Court. These locations contained soils that needed to be removed to provide the storm sewer with a specified
base.
The select granular borrow quantity is also related to subgrade excavation in that after the unsuitable material is excavated,
the hole needs to be filled with an approved material. The Contractor attempted to use on-site material as much as possible
to backfill but there was not always adequate material on site, Select granular borrow was then used to completely backfill
which accounts for the 145 CY of extra select granular borrow listed below.
The occurrence of subgrage excavation for retaining walls included excavation for two new walls on Ridgewood Road and
one on Siems Court as well as the three retaining walls identified in the original Contract. The new wall located across
Ridgewood Road from the Island Beach Club wetland was necessary because of a desire to maintain the tree-lined slope
while the other two were requests by residents. In all cases, material behind the proposed location of the walls needed to be
removed and replaced with appropriate soils to maintain structural integrity, The three additional walls mentioned here
also account for the additional 283 SF of Modular Block Retaining Wall listed below,
For the third occurrence of sub grade excavation, access road maintenance, there are two separate items that need to be paid
for; a volume of subgrade excavation and an excess quantity of aggregate base CL 5. Included in the project as a contract
item, aggregate base CL 5 was to be used as a contingency item, like subgrade excavation, During the project, the
aggregate base CL 5 item was used almost exclusively as access road maintenance along Siems Court and Ridgewood Road
after the existing pavement was removed and before the proposed pavement was placed in response to resident requests
following rain events, Aggregate Base CL 5 was placed on the roadway in order to maintain a clean and sufficiently wide
driving surface, The CL 5 material placed for access maintenance amounts to 1,120 tons over the 1,000 tons originally
identified in the contract for a total of2,120 tons, With respect to subgrade excavation, all 2,120 tons of CL 5 placed for
the access road had to be excavated when it came time to construct the roadway. The 1082 CY of subgrade excavation
referenced above is calculated using the MnJDOT conversion factor of 1.96 tonslCY The other portion of the construction
that utilized additional aggregate base CL 5 was for specific locations which required a thicker section of base in order to
correctly match into existing driveways, Particularly in areas where the roadway was being lowered, extra CL 5 was
needed to smoothly transition into existing areas. These areas included portions of Siems Court, Ridgewood Road, and
Skiles Lane and equated to an additional 266 tons for a total of 1,386 tons of additional aggregate base CL 5,
The special walk item is used for the reconstruction of resident owned walking surfaces or stairs damaged during
construction, Due to either unforeseen field conditions or specific requests by residents, three additional properties
reqnired either walking surface or stair reconstruction, two on Siems Court on one on Skiles Lane,
The project specifications indicate that bituminous density is to be tested for all roadways, The density should meet the
standard specifications of MNIDOT requirements. If the density exceeds the MNIDOT requirements, a bonus is given to
the Contractor, conversely, if the density is below the MNIDOT requirements then deductions are imposed. The density
tests for the bituminous on this project showed that overall the densities were below the MNIDOT requirements which
means a deduction shall be imposed. This is shown as a lump sum item below,
1. Subgrade Excavation 3,474 CY
2, Select Granular Borrow 145 CY
3, Aggregate Base, CL 5 1,386 Ton
4, Modular Block Retaining Wall 283 SF
5, Special Walk 213 SF
6, Bituminous Density IncentivelDisincentive
Subtotal Schedule A - Roadway
$ 12.34/CY
$ 14,22/CY
$l1.52fTon
$20.60/SF
$ 12.40/SF
Lump Sum
$42,869,16
$ 2,061.90
$15,966.72
$ 5,829,80
$ 2,640,00
($6.739.34)
$62,629.44
Schedule B - Storm Drainage
There were Contract Items where additional quantities were needed to complete construction, these items include:
raingarden grading and sodding, type lawn. The raingarden grading item over-ran the contract quantity because of resident
requests regardiug size or shape and also because two raingardens were dug deeper than specified in the plans in order to
create the most efficient drainage situation possible. The sodding, type lawn item over-ran the contract quantity because
work along Lake Johanna Boulevard was more difficult than originally anticipated due to the fact that the actual location of
existing private utilities covered a broader area than what was identified by the utility companies, Consequently, storm
sewer construction and dirt spoil piles impacted a larger area which then required more restoration and sodding,
There was also a change in the size of the culvert pipe draining the wetland south of Lake Johanna Boulevard to Lake
Johanna. The original plan had a 29"x18" concrete arch pipe which was changed to a circular 30" pipe. The 30" concrete
pipe quantity was accounted for in Change Order No. 1 while the two pipe aprons and trash guards were not. The pricing
for the 30" aprons and trash guards is higher than the 29"x18" and so the approved prices are included below.
Items 5 - 9 below represent lump sum work items for proposed storm sewer performed by the Utility Contractor during
construction. These were regarded as necessary due to unforeseen existing conditions and approved by the City during
construction, The description of the lump sum items are included below:
1. Raingarden Grading 88.7 CY $ 14,OO/CY
2. Sodding, Type Lawn 708 SF $3.20/SF
3. 30" RC Pipe Apron 2 Each $2,492/Each
4, Trash Guard for 30" Pipe Apron 2 Each $l,OOl/Each
5, Modification of Catch Basin 6-1 and 12" outlet pipe to accommodate
existing sanitary sewer service
6. mstallation of 4" pipe drain from raingarden to Manhole 3-5
at Arden Place and Ridgewood Road
7, mstallation of additional Catch Basin adjacent to Manhole 1-3
at Siems Court and Lake Johanna Boulevard
8, Replacement of newly installed Catch Basin 6-1 with a 48"
Manhole to better align with curb
9. Modification of Catch Basin for 8-1A and 8-3A to better
match curb elevation
Subtotal Schedule B - Storm Drainage
$ 1,241.80
$ 2,265.60
$ 4,984.00
$ 2,002.00
$ 1,504.20
$ 1,044.40
$ 2,453.56
$ 1,518.60
$ 57LlO
$17,585.26
Schedule C - Watermain
The 5 items listed below represent lnmp sum watermain work items approved by the City during construction and
performed by the Utility Contractor, These work items were regarded as necessary due to unforeseen existing conditions.
The description of the Inmp sum items are included below:
I. Repair existing water service near 1450 Skiles lane
damaged during construction
2. Repair and relocate damaged water service behind proposed
retaining wall on Ridgewood Road
3. Repair and relocate damaged water service behind proposed
retaining wall on Siems Court
4, Remove and replace 8" gate valve at SE comer of Lake
Johanna Boulevard and Ridgewood Road
5. Disconnect and replace water service at 3535 Siems Court
Subtotal Schedule C - Watermain
$ 2,186.63
$ 1,678.98
$ 2,048.00
$ 4,582.20
$ 396,78
$10,892.59
Schedule D - Sanitary Sewer
The 7 items listed below represent lump sum sanitary sewer work items approved by the City during construction and
performed by the Utility Contractor. These were also regarded as necessary due to unforeseen existing conditions, The
description of the lump sum items are included below:
I. Repair existing 8" sanitary sewer conflicting with proposed
storm sewer between manholes 6-4 and 6-2B =
2. Lowered sauitary service conflicting with proposed 12"
storm sewer at 3551 Ridgewood Road =
3. Lowered sanitary service conflicting with proposed 12"
storm sewer at 1556 Arden Place =
4, Remove sections of two sanitary sewer manholes on Lake
Johanna Blvd and replace with barrel sections to match grade =
5. Remove section of a sanitary sewer manhole on Ridgewood
Road and replace with a barrel section to match grade =
6. Remove section of a sanitary sewer manhole on Siems
Court and replace with a barrel section to match grade =
7. Repair damaged 12" sanitary sewer line along Old
Snelling Ave and Arden Place =
Subtotal Schedule D - Sanitary Sewer
$ 2,323.47
$ 785.50
$ 1,590.34
$ 6,923.53
$ 1,903.87
$ 930.28
$ 913.18
$15,370.17
CHANGE ORDER SUMMARY
Schedule A - Roadway
Schedule B - Storm Drainage
Schedule C - Watermain
Schedule D - Sanitary Sewer
$62,629.44
$17,585.26
$10,892.59
$15,370.17
$106,477.46
Total Contract Modification for Change Order No.3
End of Change Order No.3
~
~~HILLS
MEMORANDUM
DATE:
March 8, 2007
TO:
Kristine Giga, Civil Engineer
Sue Iverson, Finance Director~
I
FROM:
SUBJECT:
Enterprise Fund Balances
In response to your inquiry, I have researched the current balances in the Enterprise and PIR
funds. There seems to be sufficient monies available in each fund, with the exception of the
Surface Water Management Fund to cover the costs you inquired about.
The cash balances as of March 7,2007 are as follows:
PIRFund $5,616,5433
Water Utility $633,213
Sanitary Sewer Utility $336,751
Surface Water Management ($13,343)
The Surface Water Management Fund has generally been running negative and we could transfer
monies from the PIR to that fund if necessary or include that portion of the costs in the PIR
Fund, this is not an uncommon practice as road and storm sewer improvements are usually done
together.
These are just preliminary numbers, unaudited numbers as we are not done with all the closing
entries from 2006. If you have any other questions, I would be happy to assist you.