ITEM 5.1 CSAH Improvement projectOtkzo
MINNESOTA V
DEPARTMENT INFORMATION
Request for
City Council Action
ORIGINATING DEPARTMENT:
REQUESTOR:
MEETING DATE:
Public Works
City Engineer Wagner
August 24, 2015
PRESENTER(s):
REVIEWED BY:
ITEM #:
City Engineer Wagner
City Administrator Johnson
5.1
AGENDA ITEM DETAILS
RECOMMENDATION:
Staff recommends approval of the proposed Supplemental Agreement No.1, in the amount of
$274,801.36 (City portion = $130,538.99) for the 70th Street/CSAH 37 Improvement project.
ARE YOU SEEKING APPROVAL OF A CONTRACT? IS A PUBLIC HEARING REQUIRED?
No I No
BACKGROUND/JUSTIFICATION:
As the project and the grading of the road base has moved forward there have been many areas of
organic topsoil and/or other unsuitable soils that have been encountered. Though most of these soils
have been found next to the existing road where the road is being widened or shifted to the north or
south, some have been found within the existing road bed. The thickness and content very greatly from
location to location. Much of the unsuitable soils are not organic but rather supersaturated clays and silts
that are very unstable and must be removed in order to provide a stable road base. Large rock and
boulders have been found (which trap water and saturate the surrounding soil) as well as sheet metal and
other items used to help support the road or allow the field to drain quicker. Typically soil borings were
done every — 500' and within the existing road. These variations do not show up on the soil boring.
Hakanson Anderson has been working closely with the geotechnical engineer (Braun Intertec) and
contractor (Fehn Companies) to determine the extent of the removal of unsuitable soils at the time of
excavation at each location. There are contract unit prices for both the additional removal (muck
excavation) and additional fill of these areas (common borrow).
There are some areas that the contractor has already attempted to fill using the common borrow material
(onsite clay) as originally planned but was unable to meet specified density requirements due to the
unsuitable soils below and/or amount of moisture entering these excavation areas. In these situations it
has been determined that a granular material must be used at the bottom of the excavation (and in some
extreme cases a layer of fabric is needed to separate the sand from the soft clays) to provide a stable base
to build on. In areas, as directed by the Engineer, Select Granular Borrow will be used as backfill material
in addition to or in lieu onsite clay material to minimize muck excavation and additional common borrow.
We have negotiated a unit price with the Contractor for the Select Granular Borrow as provided in
Mn/DOT Specification 1904. We have discussed this unit price with MnDOT and Wright County and feel
the unit price is reasonable. We have negotiated the unit price for geotextile fabric with the Contractor as
well.
Attached is a the Supplemental Agreement No.1 which we hope includes all unplanned excavation costs
used -to -date as well as anticipated to complete the grading and construction of the road subgrade.
Please note on the MnDOT Supplemental Agreement form that "funding group/category" #1 represents
the City's portion of the project and #3 represents the County's portion.
SUPPORTING DOCUMENTS: x ATTACHED ❑ NONE
• Supplemental Agreement No.1
• Supplemental Agreement Quantity Breakdown
POSSIBLE MOTION
Please word motion as you would like it to appear in the minutes.
Motion to approve proposed Supplemental Agreement No.1 for the 70th Street/CSAH 37 Improvement
project, in the amount of $274,801.36 (City portion = $130,538.99).
BUDGET INFORMATION
FUNDING: BUDGETED: x YES
MSAS Funds
Region 7W Federal Funds o NO
ACTION TAKEN
❑ APPROVED AS REQUESTED ❑ DENIED ❑ TABLED ❑ OTHER (List changes)
COMMENTS:
70th Street/CSAH 37 Improvment Project
SP 217-112-002 SP 086-637-033
8/10/15
Supplemental Agreement #1
As of 8/4/15
City ,Total 8,550 LF
of project complete = 60.0% (corrections complete 127+00 to 157+00 and 190+00 to 211+00)
Remains 3450 (157+00 to 190+00 remains)
Muck (EV) Planned = 491 CY
Used to date = 12,043 CY
Est. Remaining = 4,817 CY
Est. Total = 16,860 CY
Est. Addn'I Total=r16,369 CY <-- Supplimental Agreement Total
Select Granual Borrow (LV) Planned = 0 CY
Used to date = 0 CY
Est. Remaining= 2,000 CY
Est. Total = 2,000 CY
Est. Addn'I Total = 2,000 CY <-- Supplimental Agreement Total
Common Borrow (LV) Planned = 11,055 CY
Used to date = 15,656 CY
Est. Remaining = 4,262 CY
Est. Total = 19,918 CY
Est. Addn'I Total = 8,863 CY <-- Supplimental Agreement Total
Geotextile Fabric Planned = 0 SY
Used to date = 0 SY
Est. Remaining= 1,600 SY 300 LF * 48' wide)
Est. Total = 1,600 SY
Est. Addn'I Total = 1,600 SY <-- Supplimental Agreement Total
County Total 3,450 LF
of project complete = 88% (corrections complete 211+00 to 233+00 and 5+50 to 14+00)
Remains 400 (1+50 to 5+50 remains, large & deep muck area)
Muck (EV) Planned = 1,713 CY
Used to date = 4,000 CY
Est. Remaining= 7,980 CY
Est. Total = 11,980 CY
Est. Addn'I Total = 10,267 CY—�<-- Supplimental Agreement Total
Select Granual Borrow (LV) Planned = 0 CY
Used to date = 0 CY
Est. Remaining = 7,500 CY
Est. Total = 7,500 CY
Est. Addn'I Total = 7,500 CY <-- Supplimental Agreement Total
Common Borrow (LV) Planned = 2,043 CY
Used to date = 5,200 CY
Est. Remaining = 2,874 CY
Est. Total = 8,074 CY
Est. Addn'I Total = 6,031 CY <-- Supplimental Agreement Total
a�,r.fa E'FQ:,>
STATE AID FOR LOCAL TRANSPORTATION Rev. July2014
,d5 SUPPLEMENTAL AGREEMENT
SP 217-112-002 & 086 637-033 II MN Proj. No. STPM 8615 SA No. 1
Project Location: CSAH 37/70th Street, Otsego, MN
Local Agency: City of Otsego Project No. 14-01_ &_ 14-02
]Contract
- -
Contractor: Fehn Companies
-Local
No. ^_
_
Address/City/State/Zip: 5050 Barthel Industrial Dr, Albertville, MN 55301
Total Supplemental Agreement Amount $ 274,801.36
This contract is between City of Otsego and the Contractor as follows:
WHEREAS: The Engineer has determined that areas of organic and other unsuitable
soils exist where none where anticipated and some areas of expected unsuitable soils
are more extensive than originally planned
WHEREAS: The Engineer has determined that some of these unsuitable soils must be
removed to provide a stable road base;
WHEREAS: The extent of the removal of unsuitable soils shall be determined at the
time of excavation at each location as determined by the Geotechnical Engineer;
WHEREAS: the contractor has attempted to fill these corrected area with common
borrow material as originally planned but was unable to meet specified density
requirements due to the unsuitable soils below and/or amount of moisture entering
these excavation areas;
WHEREAS: as directed by the Engineer, Item 2105.522-Select Granular Borrow
meeting MnDOT 3149.D.3, shall be used as backfill material in addition to or in lieu of
2105.523-Common Borrow and as directed by the Engineer, Item 2105.604 Geotextile
Fabric, Type 5 shall be used to separate the unsuitable and granular materials.
NOW, THEREFORE, IT IS HEREBY MUTUALLY AGREED AND UNDERSTOOD
THAT:
1. Payment for the removal of additional unsuitable soils will be at the Contract Unit
Price for Item 2105.505-Muck Excavation.
2. Payment for the Select Granular Borrow and Geotextile Fabric Type 5 will be at
the Negotiated Unit Price basis as provided in Mn/DOT Specification 1904.
3. Contract time will not be modified
4. This Supplemental Agreement covers the known and anticipated costs
attributable to the work covered by this Supplemental Agreement. If the
Contractor incurs unknown and unanticipated additional work that affects costs or
impacts the critical path, the Contractor reserves the right to request an
adjustment to the Contract amount or contract time in accordance with MnDOT
1402.
Ee°.Fet9E3pT :-
STATE AID FOR LOCAL TRANSPORTATION
SUPPLEMENTAL AGREEMENT
Rev. July 2014
Estimate Of Cost: (Include any increases or decreases in contract items, any negotiated or force account gems.)
*`Group/Fund
ing category
Item No.
Description
Unit
Unit
Price
+ or —
Quantity
+ or —
Amount $
1
2105.505
Muck Excavation (EV)
CY
$4.31
16,369
+$70,551.25
1
2105.522
Select Granular Borrow (LV)
CY
$10.44
2,000
+$20,880.00
1
2105.523
Common Borrow (LV)
CY
$3.60
8,863
+$31,907.74
1
2105.604
Geotextile Fabric, Type 5
SY
$4.50
1,600
+$7,200.00
3
2105.505
Muck Excavation (EV)
CY
$4.31
10,267
+$44,250.77
3
2105.522
Select Granular Borrow (LV)
CY
$10.44I
7,500
+$78,300.00
3
2105.523
Common Borrow (LV)
CY
$3.60 1
6,031
+$21,711.60
Net Change this Agreement]
$ 274,801.36
Approved by Project Engineer:
Print Name:
Approved by Contractor:
Print Name:
Date:
Phone:
Date:
Phone:
DSAE Portion: The State of Minnesota is not a participant in this contract. Signature by the
District State Aid Engineer is for FUNDING PURPOSES ONLY and for compliance with State
and Federal Aid Rules/Policy. Eligibility does not guarantee funds will be available.
This work is eligible for: _ Federal Funding _ State Aid Funding _ Local funds
District State Aid Engineer:
Date: