1. Continuation of Public Hearing-Feasibility Report for Grandview Road Utility Improvements; Authorize Preparation of Plans & Specs.CITY OF 1 '
CHANHASSEN
690 COULTER DRIVE • P.O. BOX 147 • CHANHASSEN, MINNESOTA 55317
(612) 937 -1900 • FAX (612) 937 -5739
MEMORANDUM
TO: Don Ashworth, City Manager
FROM: Charles Folch, Director of Public Works
DATE: July 23, 1997
Action by C
Endors
Nodified
Rejecte �
Dat I •" y. ,_ mss"
Date Submitted to Commissiort
Date Submitted to Council
- 7 f ?
SUBJ: Receive Feasibility Report for Grandview Road Utility Improvements; Authorize
Preparation of Plans and Specifications - Project No. 97 -11
Attached is the feasibility study for the Grandview Road Utility Improvement Project No. 97 -11
as prepared by the project consultant engineer, William Engelhardt & Associates. The scope of
the proposed improvements has been developed to meet the long -term utility needs of the five
properties served by Grandview Road. A Notice of Public Hearing and a copy of this feasibility
study have been sent to the five property owners along Grandview Road. If, following public
testimony, there is a majority of support by the neighborhood to proceed with officially ordering
this improvement project, a decision on weather or not the watermain system shall be looped for
the neighborhood needs to be made. This report discusses the pros and cons associated with
either looping or not looping the watermain system accordingly. Staff believes that looping the
watermain system is the better option from an overall systems operations standpoint, however,
staff would support either option chosen.
At the close of the public hearing if there are no further relevant questions or concerns which
cannot be answered and would require further study, it would be staffs' recommendation that the
City Council approve the feasibility study for the Grandview Road utility improvements dated July
22, 1997 and authorize the preparation of plans and specifications, Project No. 97 -11.
jmS
Attachment: Feasibility Study
c: Dave Hempel, Assistant City Engineer
Anita Benson, Project Engineer.
Jerry Boucher, Utility Superintendent
Jeff Weyandt, Engelhardt & Associates
\ 1 cfs1\vo12 \cng\Qub1ic \97- 11\=mive feas.doc
FEASIBILITY STUDY
for
GRANDVIEW ROAD
UTILITY ARROVEMENTS
CITY OF CHANHASSEN, MINNESOTA
C.P. NO. 97 -11
G G F 6'3 i N111 AS 3E
rWr'1
JUL" ' 6
ENGINEERS DEPTz
I hereby certify that this plan, specifications, or report was prepared by me or
under my direct supervision and that I am a duly Registered Professional
Engineer under the laws of the State of Minnesota.
William R. Engelhardt
Date: July 22. 1997 Registration No. 12026
WILLIAM R. ENGELHARDT ASSOCIATES, INC.
Colt9"Itinr Zn5ineezg
MD 52 • 1107 HAZELTINE BOULEVARD
CHASKA, MINNESOTA 55318 -1008
(612) 448 -8838
July 22 1997
City of Chanhassen
c/o Mr. Charles Folch
690 Coulter Drive
Chanhassen, MN. 55317
RE: Grandview Road Utility Improvements
Honorable Mayor and City Council Members:
Pursuant to your request we have prepared a feasibility study for sanitary sewer and watermain
improvements for Grandview Road. We have included two options for watermain construction,
maps, estimated cost and proposed method of financing for the improvements.
We will be available at your convenience to address questions or concerns you may have
regarding the study.
Very truly yours,
WILLIAM R. ENGELHARDT ASSOCIATES, INC.
, /" � �z 'e /-
William R. Engelhardt
WRE/las
SUMMARY AND CONCLUSIONS
SUMMARY AND CONCLUSIONS:
1) This project is feasible from an engineering point of view.
2) The improvements to be constructed as part of this project include sanitary sewer
construction, watermain construction and restoration.
3) The total project cost is summarized as follows:
OPTION NO. 1:
Tyne of Work
Sanitary Sewer
Watermain
Restoration
Total Estimated Project Cost
Estimated Project Cost
$ 15,541.55
$ 19,608.57
$ 9.977.75
$ 45,127.87
OPTION NO. 2:
Ty1K of Work
Sanitary Sewer
Watermain
Restoration
Total Estimated Project Cost
Estimated Project Cost
$ 15,541.55
$ 33,444.21
$ 20.914.95
$69,900.71
4) All project costs are considered assessable costs.
5) The proposed method of assessment is on a residential equivalent unit (REU) basis.
SC - 1
6) We recommend the cost associated with the project to be apportioned as follows:
OPTION NO. 1:
OPTION NO. 2:
Lateral Utility
Pid No.
EM MAY
Assessment
25.0134100
Sinnen
$15,144.98
25.0134200
Anderson
$11
25.0134300
Bernier
$15,144.98
25.0134000
Kokesh
$ 3,632.72
25.0134400
Larsen
$ 0.00
Total
$45,127.87
OPTION NO. 2:
7) Option No. 2 has a higher capital cost than Option No. 1 due to additional watermain
installed to loop the system. Option No. 2 is better overall from a system standpoint in
that two sources of water flow into the neighborhood should part of the line be
temporarily shut down due to repairs and /or maintenance. Water quality issues such as
rusty or odorous water are easier to mitigate with a looped watermain system. Option
No. 1 will serve the neighborhood adequately but there may be some drawbacks as noted
above from time to time.
SC -2
Lateral Utility
Pid No.
P= g
Assessment
25.0134100
Sinnen
$21,013.04
25.0134200
Anderson
$16,295.89
25.0134300
Bernier
$21,013.04
25.0134000
Kokesh
$ 5,789.37
25.0134400
Larsen
$ 5.789.37
Total
$69,900.71
7) Option No. 2 has a higher capital cost than Option No. 1 due to additional watermain
installed to loop the system. Option No. 2 is better overall from a system standpoint in
that two sources of water flow into the neighborhood should part of the line be
temporarily shut down due to repairs and /or maintenance. Water quality issues such as
rusty or odorous water are easier to mitigate with a looped watermain system. Option
No. 1 will serve the neighborhood adequately but there may be some drawbacks as noted
above from time to time.
SC -2
8) Itemized cost estimates for the proposed improvements are included in Appendix A of
this report.
9) A cost apportionment summary is included in Appendix B of this report.
SC -3
REPORT
GENERAL:
The impetus for this study is a petition from residents owning property adjacent to
Grandview Road to serve their lots with sanitary sewer and water. The construction is
proposed to be financed through the Chapter 429 public improvements process.
The Grandview Road Utility Improvements project includes extending sanitary sewer and
watermain to serve the lots adjacent to Grandview Road. As part of this report we are
presenting proposed improvements including estimated costs and a proposed method of
financing the improvements.
The location of Grandview Road and the adjacent properties is shown on Drawing No.
1.
Grandview Road currently has an existing 33 foot right -of -way with a 15 foot (±) gravel
surface.
R -1
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SCALE: 1"=400'
smm to e�noe
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CITY OF CH AN H ASSEN
MINNESOTA
GRANDVIEW ROAD UTILITY IMPROVEMENTS
FEASIBILITY STUDY
PROJECT LOCATION
PROJECT LOCATION
WILLIAM R. ENGELHARDT ASSOCIATES
CONSULTING ENGINEERS
"_ CHASKA, MINNESOTA 55318 JULY, 1997
f1P'Y A %A11kI ^ AIn 4
SANITARY SEWER:
The proposed lateral sanitary sewer construction is shown on Drawing No. 2.
The proposed lateral sanitary sewer construction for this project includes the extension
of an existing 8 -inch diameter gravity line located on the eastern property line of the
Villages On The Pond development at the northern end of the Anderson property. The
line will be extended west along the northern end of the Anderson property and then
north in the Grandview Road right -of -way.
The size of the Anderson, Sinnen, Bernier and Kokesh properties allows for potential lot
splits in the future. The existing home on the Anderson property has a sewer service
stubbed from the Villages On The Pond development. The existing home on the Kokesh
property is currently connected to sanitary sewer from the Hidden Valley development.
It is anticipated the potential lot split of the Kokesh property will also be served from the
existing sewer stubbed in the southeast corner of the property.
The existing home on the Larsen property is currently served with sanitary sewer from
the Hidden Valley development. If future subdivision occurs on the Larsen property,
additional sewer service could be obtained from a line stubbed immediately to the
northwest by the Villages On The Ponds development.
The total estimated project cost for sanitary sewer improvements is $15,541.55.
These costs are proposed to be assessed to the benefitting properties on a residential
equivalent unit basis.
An itemized cost estimate is provided in Appendix A.
R -2
WATERMAIN:
OPTION NO. 1:
The proposed lateral watermain construction for Option No. 1 is shown on Drawing No.
2.
The proposed lateral watermain construction for this project includes the extension of a
6 -inch diameter watermain from an existing 8 -inch stub located on the eastern property
line of the Villages On The Pond development at the northern end of the Anderson
property. The watermain will be extended west along the northern end of the Anderson
property and then north in the Grandview. Road right -of -way. The size of the Anderson,
Sinnen, Bernier and Kokesh properties allows for potential lot splits in the future. It is
anticipated the future split of the Kokesh property will access water service from the
south. The existing home on the Kokesh property will be served with water by this
project.
The existing home on the Larsen property is currently being served with water from the
Hidden Valley development. If future subdivision occurs on the Larsen property,
additional water service could be obtained from a line stubbed immediately to the
northwest by the Villages On The Ponds development.
The total estimated project cost for the watermain improvements is $19,608.57. These
costs are proposed to be assessed to the benefitting properties on a residential equivalent
unit basis.
An itemized cost estimate is provided in Appendix A.
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(5) D: \CHAN \GRANDFS2 n R A WI N C; Nn 9
OPTION NO. Z
The proposed lateral watermain construction for Option No. 2 is shown on Drawing No.
3.
The proposed lateral watermain construction for Option No. 2 includes looping the
proposed watermain described in Option No. 1 into an existing 8 -inch diameter
watermain stub located in the northwestern end of the Grandview Road right -of -way.
In addition to looping the watermain, a water service will be provided for the northern
end of the Larsen property in the event of a future lot split.
Option No. 2 increases the overall watermain cost, but provides a looped system which
may reduce potential rusty or odorous water problems and also provides a secondary
source for water should part of this line need. to temporarily shut down for repairs and /or
maintenance.
The total estimated project cost for the watermain improvements is $33,444.21. These
costs are proposed to be assessed to the benefitting properties on a residential equivalent
unit basis.
An itemized cost estimate is provided in Appendix A.
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M
(5) D: \CHAN \GRANDFS2 n R A WI N C, Nn. -i
FJJ
RESTORATION:
The proposed restoration for this project includes Class 5 aggregate over a width of 15
feet in the Grandview Road right -of -way and restoring the driveway and lawn areas
disturbed by construction to a condition equal to or better than conditions before
construction.
The total estimated project cost for restoration for Option No. 1 is $9,977.75.
The total estimated project cost for restoration for Option No. 2 is $20,914.95.
These costs are to be assessed to the benefitting properties on a residential equivalent unit
basis.
An itemized cost estimate is provided in Appendix A.
EASEMENTS:
A permanent utility easement will need to be acquired along. the northern end of the
Anderson property.
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FINANCING:
The project is proposed to be financed through the sale of 429 Improvement Bonds.
The estimated project costs for lateral utility improvements is as follows:
OPTION NO. 1:
Sanitary Sewer $ 15,541.55
Watermain $ 19, 608.57
Restoration $ 9.977.75
Total Estimated Project Cost $ 45
OPTION NO. 2:
Sanitary Sewer
Watermain
$ 15,541.55
$ 33,444.21
Restoration $ 20.914.95
Total Estimated Project Cost $ 69,900.21
The total estimated project costs for lateral utility improvements includes 30 percent for
indirect project costs. All of the cost is considered assessable.
These lateral improvements are to be assessed on a residential equivalent unit basis to the
benefitting properties. In addition to the lateral assessment, each owner will pay a trunk
sanitary sewer hook up charge and a trunk watermain hook up charge. These hook up
charges can be assessed with the project or paid at the time that connection is made to
the city sewer and water system. The current trunk hook up charges are $1,190.00 per
sewer REU and $1, 550.00 per water REU. These rates are adjusted annually by the city
based on construction cost indices. If the trunk hook up charges are not assessed with
the project, it is likely the rates will be higher in the future when property connections
are made.
We recommend the project costs be apportioned as follows:
OPTION NO, 1:
Lateral Utility
Pid No.
Pro
Lateral Utility
Pid No.
Pro-
Assessment
25.0134100
Sinnen
$15,144.98
25.0134200
Anderson
$11,205.19
25.0134300
Bernier
$15,144.98
25.0134000
Kokesh
$ 3,632.72
25.0134400
Larsen
$ 0.
Total
$45,127.87
OP TION NO. 2:
An itemized summary of the assessments is provided in Appendix B.
R -7
Lateral Utility
Pid No.
Pro
Assessment
25.0134100
Sinnen
$21,013.04
25 .0134200
Anderson
$16,295.89
25.0134300
Bernier
$21,013.04
25.0134000
Kokesh
$ 5,789.37
25.0134400
Larsen
5 789. 7
Total
$69,900.71
An itemized summary of the assessments is provided in Appendix B.
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APPENDIX A
ESTIMATED COSTS
GRANDVIEW ROAD UTILITY IMPROVEMENTS
OPTION NO. 1 - DEAD END WATERMAIN
ESTIMATED COSTS
SANITARY SEWER:
8" PVC, SDR 35 390 L.F. @ $ 18.00 /L.F. _ $ 7,020.00
48" Standard Manhole
(0' -10' Depth) 2 Each @ $1,200.00 /Each = $ 2,400.00
8" x 4" Wye 5 Each @ $ 50.00 /Each = $ 250.00
4" PVC, SVC Pipe 80 L.F. @ $ 10.00 /L.F. _ $ 800.00
Subtotal = $ 10,470.00
Add: 5% Mobilization = 1--523.
Total Estimated Sanitary Sewer
Construction Cost = $ 10,993.50
Add: 30% for Engineering, Legal,
Administration and Miscellaneous = $ 4.548.05
A -1
Total Estimated Sanitary Sewer
Project Cost
= $ 15,541.55
WATER —AIN:
6" DIP, CL. 52
385 L.F. @ $ 18.00 /L.F.
_ $
6,930.00
Connect to Existing
Watermain
1 Each @ $ 250.00 /Each
= $
250.00
6" Gate Valve
2 Each @ $ 550.00 /Each
= $
1,100.00
Hydrant
2 Each @ $1,500.00 /Each
= $
3,000.00
Fittings
265 LBS. @ $ 1.50 /LB.
_ $
397.50
A -1
1" Copper Service
Pipe, Type K 134 L.F. @ $ 8.00 /L.F. _ $ 1,072.00
Service Group 7 Each @ $ 100.00 /Each = $ 700.00
Subtotal = $ 13,449.50
Add: 5% Mobilization = $ 672.48
Total Estimated Watermain
Construction Cost = $ 14
Add: 30% for Engineering, Legal,
Administration and Miscellaneous = $ 5.486.59
Total Estimated Watermain
Project Cost = $ 19,608.57
RESTORATION:
Common Excavation
(Approximately 195 C.Y.) Lump Sum = $ 1,170.00
Sod 542 S.Y. @ $ 2.50 /S.Y. _ $ 1,355.00
Temporary Trench
Restoration 539 S.Y. @ $ 3.00 /S.Y. _ $ 1,617.00
STREET RES T O RATION:
Subgrade Preparation 366 S.Y. @ $ '0.30 /S.Y. _ $ 109.80
9" Class 5 Aggregate
Base (100% Crushed
Quarry Stone) 187 Tons @ $ 8.00 /Ton = $ 1,496.00
DRIVEWAY RESTORATION:
Subgrade Preparation 173 S.Y. @ $ 0.30 /S.Y. _ $ 51.90
A -2
6" Class 5 Aggregate
Base (100% Crushed
Quarry Stone)
3" Bituminous Wearing
Course (MnDOT 2331,
Type 41B)
59 Tons @ $ 8.00 /Ton = $ 472.00
173 S.Y. @ $ 6.00 /S.Y. _ $ 1,038.00
Subtotal = $ 7,309.70
Add: 5% Mobilization = $ 365.49
Total Estimated Restoration
Construction Cost = $ 7
Add: 30% for Engineering, Legal,
Administration and Miscellaneous = $ 2,302.56
Total Estimated Restoration
Project Cost
Total Estimated Project Cost
_ $ 9,977.75
_ $ 45,127.87
A -3
GRANDVIEW ROAD U'T'ILITY IMPROVEMENTS
OPTION NO. 2 - LOOPED WATERMAIN
SANITARY SEWER:
8" PVC, SDR 35
48" Standard Manhole
(0' -10' Depth)
8" x 4" Wye
4" PVC, SVC Pipe
WATERMAIN:
6" DIP, CL. 52
Connect to Existing
Watermain
6" Gate Valve
Hydrant
Fittings
ESTIMATED COSTS
390 L.F. @ $ 18.00 /L.F. _ $ 7,020.00
2 Each @ $1,200.00 /Each = $ 2,400.00
5 Each @ $ 50.00 /Each = $ 250.00
80 L.F. @ $ 10.00 /L.F. _ $ 800.00
Subtotal = $ 10,470.00
Add: 5% Mobilization = $ 523.00
Total Estimated Sanitary Sewer
Construction Cost = $ 10,993.50
Add: 30% for Engineering, Legal,
Administration and Miscellaneous = $ 4,548.05
Total Estimated Sanitary Sewer
Project Cost = $ 15,541.55
862 L.F. @ $ 18.00 /L.F. _ $ 15,516.00
2 Each @ $ 250.00 /Each
= $
500.00
3 Each @ $ 550.00 /Each
= $
1
2 Each @ $1,500.00 /Each
= $
3,000.00
645 LBS. @ $ 1.50 /LB.
_ $
967.50
A -4
1" Copper Service
Pipe, Type K 144 L.F. @ $ 8.00 /L.F. _ $ 1,152.00
Service Group 8 Each @ $ 100.00 /Each = $ 8
Subtotal = $ 23,585.50
Add: 5% Mobilization = $ 1.179.28
Total Estimated Watermain
Construction Cost = $ 24,764.78
Add: 30% for Engineering, Legal,
Administration and Miscellaneous = $ 8
Total Estimated Watermain
= $ 33,444.21
Project Cost
RESTORATION:
Common Excavation
(Approximately 370 C.Y.) Lump Sum = $ 2,220.00
Sod 927 S.Y. @ $ 2.50 /S.Y. _ $ 2,317.50
Temporary Trench
Restoration 1,356 S.Y. @ $ 3.00 /S.Y. _ $ 4,068.00
STR EET RESTORATION:
Subgrade Preparation 1 S.Y. @ $ 0.30 /S.Y. _ $ 354.90
9 Class 5 Aggregate
Base (100% Crushed
Quarry Stone) 600 Tons @ $ 8.00 /Ton = $ 4,800.00
DRIVEWAY RESTORATION:
Subgrade Preparation 173 S.Y. @ $ 0.30 /S.Y. _ $ 51.90
C.
A -5
6" Class 5 Aggregate
Base (100% Crushed
Quarry Stone)
3" Bituminous Wearing
Course (MnDOT 2331,
Type 41B)
59 Tons @ $ 8.00 /Ton = $ 472.00
173 S.Y. @ $ 6.00 /S.Y. _ $ 1,038.00
Subtotal = $ 15,322.30
Add: 5% Mobilization = $ 766.12
Total Estimated Restoration
Construction Cost = $ 16,088.42
Add: 30% for Engineering, Legal,
Administration and Miscellaneous = $ 4,826.53
Total Estimated Restoration
Project Cost = $ 20,914.95
Total Estimated Project Cost
_ $ 69,900.71
APPENDIX B
COST APPORTIONMENT SUMMARY
Appendix B
Cost Apportionment Summary
OPTION NO.1
PID #
Property
Residential
Equivalent Units
Sewer Water
Lateral
Sanitary Sewer
Lateral
Watermain
Restoration
Total
25.0134100
SINNEN
2
2
$6,216.62
$5,602.44
$3,325.92
$15,144.98
25.0134200
ANDERSON
1
2
$3,108.31
$5,602.44
$2,494.44
$11,205.19
25.0134300
BERNIER
2
2
$6,216.62
$5,602.44
$3,325.92
$15,144.98
25.0134000
KOKESH
0
1
0
$2,801.25
$831.47
$3,632.72
25.0134400
LARSEN
0
0
0
0
0
0
TOTAL $45,1ZfA51
OPTION NO. 2
PID #
Property
Residential
Equivalent Units
Sewer Water
Lateral
Sanitary Sewer
Lateral
Watermmain
Restoration
Total
25.0134100
SINNEN
2
2
$6,216.62
$8,361.05
$6,435.37
$21,013.04
25.0134200
ANDERSON
1
2
$3,108.31
$8,361.05
$4,826.53
$16,295.89
25.0134300
BERNIER
2
2
$6,216.62
$8,361.05
$6,435.37
$21,013.04
25.0134000
KOKESH
0
1
0
$4,180.53
$1,608.84
$5,789.37
25.0134400
LARSEN
0
1
0
$4,180.53
$1,608.84
$5,789.37
1 U I ALby,yYY. /7
B -1
NOTE:
Each property is required to pay trunk hook up charges before connection to sanitary
sewer and water can be made. The 1997 trunk hoop up rates are $1,190.00 /REU trunk
sanitary sewer and $1,550.00 /REU trunk watermain. These rates are adjusted annually
by the city based on construction cost indices.
MW