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CITY OF ROSEMOUNT
EXECUTIVE SUMMARY FOR ACTION
CITY COUNCIL MEETING DATE: September 4 , 1990
AGENDA ITEM: AGENDA SECTION:
Receive Feasibility Report for Diamond
Path Improvements, City Project #212 � New Business
PREPARED BY: AGEN NO. :
Richard M. Hefti, �����J ,� ��' ��
City Engineer/Public Works Director � �L �
This item consist of receiving t.he attached feasibility report for
roadway and storm sewer improvem�,ents for Diamond Path (CSAH 33) from
just to the south of 145th Stree.t to just to the north of Connemara
Trail (140th Street) .
This feasibility report has been a collaboration between Dakota
Ccunty Highway Department, Barr Enginee:-ing, OSM Engineering and
Staff. Page 3 of the feasibilit:y report contains an executive
summary of the feasibi�ity repoz•t.
I would propose holding the publ.ic hearing at the October 4 , 1990
meeting. This will require acti.on at a subsequent Council meeting
after we have resolved the collector and local street assessment
policies. The result of the assessment policies may or maynot effect
the assessment area for this project.
RECOMMENDED ACTION: Appr'ov�d by:
Motion to adopt a resolution receiving the ��,�
feasibility report for Diamond Path Improvements, - '
City Project #212 . ��
COUNCIL ACTION:
II Adopted resolution.
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, CITY OF ROSEMOU1dT
DAROTA COUNTY, MINNESOTA
RESOLUTION 199Q -
A RESOLUTION I2�CEIVING THE FEASIBILITY REPORT
DIAMOND PATH IMPROVEMENTS
CITY PROJECT #212
WIiEREAS, the City Council deemed it necessary and expedient that
the City of Rosemount, Minnesota, construct certain improvements,
to-wit: City Project #212, Diamond Path Improvements, in the City
as described in and in accordance with the feasibility report
prepared by Dakota County Highway Department, Barr Engineering, OSM
Engineering and City Staff, and;
WHEREAS, the City Council has been advised by the above that said
roadway and storm sewer improvements on Diamond Path, City Project
#212, is feasible, and should best be made as proposed, and the
report to this effect has heretofore been received by Council, and
filed with the City Clerk on September 4, 1990; and
NOW THEREFORE BE IT RESOLVED, the City Council of the City of
Rosemount accepts the feasibility report for City Project #212 and
- places it on file.
ADOPTED this 4th day of September, 1990.
Vernon J. Napper, Mayor
ATTEST:
Susan M. Johnson, City Clerk
Motion by: Seconded by:
Vote in favor•
Vote against•
.
FEASIBILITY REPORT
FQR
DIAMOND PATH STREET IMPROVEMENTS
(145TH ST W TO CONNEMARA TRAIL)
CITY PROJECT NO. 212
I hereby certify that this report was prepared
by me or under my direct supervision and that
I am a duly Registered Professional Engineer
under t e ws o t State of Minnesota.
Richa . Hefti, �.E.
Date: $l3ol�p Reg. No. 14973
Page 1
TABLE OF CONTENTS
TITLE PAGE/CERTIFICATION
TABLE OF CONTENTS
PAGE NO.
EXECUTIVE SUNIlKARY 3
PART 1 - INTRODUCTION 4
1.1 Authorization
1.2 Scope
1.3 Data Available
1.4 Feasibility
PART 2 - GENERAL BACKGROUND � 6
2 . 1 Location
2 .2 Project Area
2 . 3 Existing Conditions
PART 3 - PROPOSED IMPROVEMENTS 8
3 . 1 Street
3 .2 Drainage
3.3 Walkways
3.4 Detour Route
3 .5 Street Lighting
3 .6 Easements
3 .7 Permits/Approval,s
PART 4 - FINANCING 11
4 . 1 Cost Estimates
4.2 Assessment Area
4 .3 Cost Recovery
4.3. 1 Storm Drain
4.3.2 Street
4.3 .3 Bituminous Walks
4. 3 .4 Cost Recavery Table
PART 5 - PROJECT SCHEDULE 14
EXHIBITS A, B-1, B-2, B-3, C, D
Page 2
EXECUTIVE SUMMARY
On March 20, 1990, Council authorized the preparation of an engineering
feasibility report to investigate improvements Dakota County proposes
to make to Diamond Path (CR 33) . The Public Works Department, the
County Highway Department, Barr Engineering, and OSM Engineering worked
together to prepare this feasibility report. This report presents the
results of the study and recommends council proceed with this project.
The proposed improvements studied within this report (pages 8-10) are
feasible from an engineering standpoint. These improvements basically
include:
(1) Widening Diamond Path to 4 traffic lanes, bituminous surfaced
street with concrete curb and gutter, and a continuous center
left hand turning lane between 145th Street and Connemara
Trail
(2) Widening 145th Street from Diamond Path to Shannon Parkway
as proposed in Project #206
(3) Installing storm drain piping from BIR144 pond to Birger Pond
(4) Constructing an 8 ' trail along the east side of Diamond Path
(5) Installing streetlights
Diamond Path improvements are estimated to cost $1, 327, 000 and 145th
Street improvements are estimated to cost $703, 100. Financing is
discussed in pages 11-13. Dakota County would like to begin
construction of the storm drain piping in the fall of 1990, however,
it is unlikely the city can proceed with the public improvement process ',
in time to meet this timetable. It is more realistic that construction j
will occur in 1991.
The following report includes background on the project, proposed
improvements, financing, project schedule, and exhibits.
- Page 3
PART 1 - INTRODUCTION
1. 1 AUTHORIZATION
On March 20, 1990, Council initiated this project by authorizing the
preparation of an engineering feasibility report for street and
drainage improvements for a segment of Diamond Path (County Road 33)
between 145th Street West and Connemara Trail. The Diamond Path
improvements are designated as City Project No. 212 .
1.2 SCOPE
The scope of this project is to reconstruct and realign this street
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from just south of 145th Street West to just north of Connemara Trail.
The existing two lane pavement with ditches will be replaced with a
five lane bituminous pavement with curb and gutter and bituminous
trails. The existing curve by the Baptist Church will be removed and
Diamond Path will be straightened to form a "T-shaped" intersection
with 145th Street West. Because of the removal of the curve, 145th
Street West will have to be reconstructed about half way to Shannon
Parkway. As Shannon Parkway would make a better cut-off point, we
propose to reconstruct 145th Street all the way to Shannon Parkway.
This would encroach into the project area originally included within
the Project #206 feasibility report. Some of the data and cost
estimates are taken from that report.
1. 3 DATA AVAILABLE
The preparation of this report relies upon the following information
and material:
1. Dakota County Highway Department drawings and survey
information for Diamond Path.
Page 4
2. CitY of Rosemount Drainage Plan - West Drainaqe Area, May
1989, Barr Engineering.
3 . Feasibilitv Report for 145th Street Reconstruction Project
206, February 1990, OSM Engineering.
3 . Record plans for Country Hills and Country Hills 2nd
Additions.
4. City of Apple Valley engineering information.
1.4 FEASIBILITY
The project is feasible from an engineering standpoint and can best be
carried out by combining it with the reconstruction of the section of
145th Street West between Diamond Path and Shannon Parkway under one
contract administered by the County.
i
Page 5
PART 2 - GENERAL BACKGROUND
2.1 LOCATION
Diamond Path is located, for the most part, on the boundary line
between Apple Valley and Rosemount. The portion of Diamond Path south
of 145th Street West is located entirely within the City of Rosemount's
corporate limits. The reconstruction and realignment of Diamond Path,
as seen in Exhibit B-2, will take place from about 400 feet south of
145th Street West to about 500 feet north of Connemara Trail. Exhibit
B-3 shows an illustration from Project #206 depicting the portion of
145th Street that we would include with this project.
2 .2 PROJECT AREA
The portion of Rosemount that abuts the project area consists of the
following properties (see Exhibit A} :
Properties Zonincr
Country Hills Addition� R-1
Country Hills 2nd Addition� R-1
Broback Industrial Park; Blk 1, Lots 1-4 IG
Broback 5th Add'n; Blk 3, Lots 1-7 R-1
Broback 3rd Add'n; Blk 1, Lots 1,2,4, & 5 R-1
Broback 2nd Add'n; Blk 1, Lots 1-3 ; Blk 1, Lots 1 & 2 R-1
Evergreen Acres; Blk 1, Lot 1 R-1
34-03010-010-30 & 010-44 (Rosemount Baptist Church) PUB/AG
34-03010-010-43 R-1
34-03010-010-45 R-1
34-03010-010-36 R-1
34-03010-010-40 R-1
34-03010-020-40 R-1
34-03010-010-39 R-1
34-03010-010-41 R-1
� streets and storm sewer
Page 6
34-03010-014-37 R-1
34-03010-013-37 R-1
34-03010-010-35 R-1
34-03010-020-35 R-1
LeForet Addition2 g�
Birchview Terrace 1st & 2nd Additions2 RR
34-01910-010-502 �
34-01910-011-252 AG
34-01910-012-252 AG
2 storm sewer onl�
2 .3 EXISTING CONDITIONS
Diamond Path and 145th Street West are two lane roadways with a 24 foot
bituminous driving �urface, gravel shoulders and ditches for drainage.
Diamond Path begins at Pilot Knob Road (CSAH 31) in Apple Valley and
ends at County Road 42 in Rosemount. The latest traffic volumes from
MnDOT (1989) show an average of 6,500 vehicles per day travelling this
roadway.
The intersections at Connemara Trail and 145th Street West pose hazards
to motorists. Although the County improved the safety of the Connemara
Trail intersection when they installed a four-way stop last year, the
road is two narrow to provide for turn lanes. The lack of adequate
nu�;�er of lanes also delays the opportunity for installing signal
lights. The accesses onto the Diamond Path curve by the Baptist Church
poses difficulty for traffic attempting access onto Diamond Path as
well as traffic along Diamond 1�ath. From January 15, 1989 through May
11, 1990 there have been 13 reported accidents along this curve. The
cu�ve also poses more of a hazard when the road surface is slippery.
Page 7
PART 3 - PROPOSED I�PROVEMENTS
3. 1 STREET
The County is proposing, as shown by the typical section in Exhibit B-
1, to widen the roadway to a five lane urban roadway (concrete curb and
gutter) to handle existing and anticipated traffic volumes safely. The
five lane roadway would allow two lanes of traffic in each direction
and a center lane for left turning vehicles. The County will be
designing the street to accommodate nine ton axle weights. The street
will transition back to the existing roadway.
Exhibit B-2 shows the County eliminating the existing curve by
straightening the roadway out as it passes by the Baptist Church. It
will still contain a slight curve so that it can align with the segment
of Diamond Path south of 145th Street West. The ramoval of the curve
will require the reconstruction of 145th Street to Shannon Parkway.
The 145th Street section and proposed improvements were discussed in
Project #206.
3 .2 DRAINAGE
Because of the urban roadway section, it will be necessary to install
storm drain pipe to transport runoff. Runoff doesn't recognize city
boundaries, so the existing topography and storm water plans for the
City of Apple Valley and Rosemount suggested it would be appropriate ,
for Apple Valley to design the south portion of this roadway while �'
Rosemount designs the north. One of the reasons for including the �
portion of 145th Street west of Shannon Parkway is that drainage of
Delft Avenue requires the construction of storm sewer east of Delft
Avenue to about halfway to Shannon Parkway, as Exhibit C depicts. From
here it will go to the north and into Hawkins Pond.
The piping system design for Diamond Path project is defined largely
Page 8
by drainage areas consisting of street surface and adjacent boulevard
areas. Exhibit C illustrates the drainage areas for the portion of
the project that Rosemount is designing for. In addition to the street
and boulevard drainage areas there are some watersheds that will be
drained by the Diamond Path System and will impact the system sizing.
The portion of the system that Apple Valley is draining will include
the roadway and boulevard areas only.
The estimated cost to construct the drainage system necessary as shown
amounts to about $822,700. Exhibit D shows a detailed cost estimate.
Of these costs, Rosemount's share based on peak discharge is estimated
to be about $572,500 plus its share of Apple Valley's system, which is
estimated at $23, 600. MnDOT will determine final cost participation
when the County submits the plans to them for approval.
3. 3 TRAILS/WALKWAYS
A new 8 ' bituminous trail is proposed for the east side of Diamond Path
from Connemara Trail to 145th Street. The existing 8 ' bituminous trail
along the south side of 145th Street may need to be reconstructed as
needed. All costs of new bituminous walkway construction and
reconstruction will be the responsibility of Rosemount.
3 .4 DETOUR ROUTE
The County will be planning the detour route, possibly using Connemara
Trail to Shannon Parkway.
3.5 STREET LIGHTING
Street lighting is within the Dakota Electric service area. Their
policy is to contract directly with the city for their forces to '
install streetlights. The streetlights would be the 25 ' high, mast arm I�
type with 250 watt lamps. Estimated costs for street lighting would
be $14,400.
Page 9
3 . 6 BURIED CABLE
Dakota Electric has the overhead power lines along 145th Street. They
estimate the costs to bury the cables at $26,250. This work did not
include burying the cable to the houses. Under this proposal the lines
along and crossing 145th Street would be buried, but the service lines
would be brought up the service poles and remain overhead to existing
houses. Burying the service line would be the responsibility of each
property owner. There will be a cost to each property of about $600
to bury the lines from Dakota Electric's buried cable to the house.
This cost does include removing the overhead mast arm and installing
a buried connection. Dakota Electric's policy differs from NSP in that
NSP would bury the customer's line to the house, whereas Dakota
Electric will not. The buried entrance electrical work must be done
by a master electrician. As with NSP, the customer's household
electrical wiring must be up to electrical code, otherwise the customer
will have to bear the expense of bringing their entire household wiring
up to code.
3. 6 EASEMENTS
The County will be responsible for obtaining all easements. The city
will be responsible for 45 percent of the costs for easement
acquisition within the city's borders.
3 .7 PERMITS/APPROVALS
The Municipal State Aid Division will need to approve the plans so that
we will be eligible for reimbursement for the portion of the
construction that will take place along 145th Street West.
Page 10
PART 4 - FINANCING
4. 1 COST ESTIMATE
The cost estimates for this project are based on 1990 construction
costs, except as noted, and include a 10% contingency factor and a 30�
overhead factor. The overhead factor includes legal, engineering, __
interest, and other administrative costs.
Table 1 shows the cost estimate summary. The cost estimate is broken
down into streets and storm sewer for Diamond Path and 145th Street.
These costs do include a rough estimate for easement acquisition cost.
Diamond Path 145th St� Total
Item Est'd Cost Est'd Cost Est'd Cost
Streets $270,OOOZ $249, 000 $519, 000
Storm Drain $596,100 $120,800 $716,900
Walkways $26,500 $13, 300 $39,800
Streetlights $14,400 $8, 000 $22,400
Watermain $0 $90, 100 $90, 100
Sub-total $907, 000 $481,200 $1,388,200
10% Conting. $90,700 $48, 100 $138,800
Est'd Constr. . $997,700 $529, 300 $1,527, 000
30% LEAF $299,300 $158,800 $458, 100
Est'd Proj . $1,297, 000 $688, 100 $1,985, 100
Easements $30, 000 $15, 000 $45,000
Total $1,327, 000 $703,100 $2,030, 100
� from Project #206, 145th Street Reconstruction
Z based on 1/2 of 45% of Dakota County's CIP estimate
Page 11
4.2 ASSESSMENT AREA
The general assessment area for storm drainage is shown on Exhibit C.
The street assessment area will not be known until Council determines
a street reconstruction assessment policy, which Staff and Council are
planning to do in September, 1990.
4. 3 COST RECOVERY
This section covers the anticipated revenue sources for funding this
project, such as special assessments, storm sewer core fund, and MSA
fund. Tr� amounts of sprecial assessments will not be known until
Council a��pts a street reconstruction assessment policy that will
designate what percentage the city will assess benefited property.
What cast is not assessed must be covered using the appropriate core
facility fund, MSA fund, or general levy. The following will indicate
what revenue sources are available and appropriate.
4. 3 . 1 Storm Drain - Revenues for storm drain will come from Storm
Sewer Core funds and either special assessments or storm drain
utility fees. (The latter wi11 require city action to set up
a storm drain utility. )
Rosemount's share of the storm drain cost for the Diamond Path
system required to provide an outlet to Pond Bir144 should be
the responsibility of the watershed generating the runoff.
This can be recovered through special assessments or through
a storm drain utility fee. The cost to drain Rosemount's share
of street runoff from Diamond Path should be recovered through
special assessments and can be included with the cost of a
residential street equivalent. ,
For 145th Street, the Storm Sewer Core fund would cover the I�
over-sizing costs of the 30" and 36" pipe sizes from Delft
Page 12
Avenue to Hawkins Pond until Project 177, Storm Sewer
Improvements for Section 30 occurs. The pipe necessary to
drain the street should be recovered through special
assessments and can be included with the cost of a residential
street eguivalent.
The residential equivalent for storm sewer will be considered
as the size of pipe necessary for street and R/W drainage only.
In this case, the pipe size necessary for street and R/W
drainage would be 12", 15", and 18".
4.3 .2 Street - Revenues for street construction will be available
through special assessments based on a residential street
equivalent with the balance coming from the MSA fund or general
levy.
. The residential equivalent rate for streets is for the
construction of a 32 ' wide bituminous surfaced street with
concrete curb and gutter, and lateral storm drain necessary to
drain the street. This report will use the residential
equivalent from the feasibility report for Project #206, which
was $103.40 per centerline foot, or $51.70 per foot of
frontage.
4. 3.3 Trails - Revenues for 5/8ths of the bituminous walkway
construction along 145th Street West will come from Municipal
State Aid Funds. The remainder, as well as the entire walkway
along Diamond Path will have to come from the either
assessments, general le�y, or CIP fund.
Page 13
PART 5 - PROJECT SCHEDULE
The proposed schedule for this improvement is as follows:
Receive Feasibility Report September 4, 1990
Public Hearing October, 1990
Approve Plans/Specifications Oct/Nov, 1990
County Bid Opening Navember, 1990
Begin Construction November, 1990
Complete Construction August, 1991
Assessment Hearing Fall, 1991
First Payment Due With Taxes May, 1992
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Page 14
TYPICAL SECTION
� � 4 LANE W/LEFT TURN '
sra. �+oo-3�+20
NOTE� '
VARIABLE ROADWAY IS IN TRANSITION
� FROM STA. 0�00 TO STA. 7+00 AND
R/W FROM STA. 37+20 TO 44+57. SEE DE
50' q0' -------...� AND X-SECTION SHEETS.
32 32 -
�PROFILE GRAOE
2, 8� 8�- 14� 12' 6' 6' 12' J4' VA�I� �tj��
B i T.�
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- -- � 0.02 0.02
--=--------- -----_ _ � 0 �
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\ 2A SUBGRADE EXCAVATION 2.0 GRANUTAR 6t�CK.FiLL __J R/W
INSET��B'� -�'
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145th. ST.
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+ �. ALL FILIS�OPES,BACKSLOPES AND OITCHBOTTOMS
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- r�T, MINN��SQiT�.� EXHIBIT B-3
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DIAMOND PATH COST ESTIMATE
WITH PONDS
Item No. Description Quantity Unit Unit Cost Extension
1 Mobilization (10%) 1 L.S. $49,600 $49,600
2 48"RCP, CL3 (0-8') 64 L.F. 96 6,144
3 48"RCP, CL4 (8-10') 25 L.F. 100 2,500
4 48"RCP, CL4 (10-12' ) 40 L.F. 104 4,160
5 48"RCP, CL4 (12-14') 80 L.F. 108 8,640
6 48"RCP, CL4 (14-16' ) 633 L.F. 112 70,896
7 42"RCP, CL3 (0-8' ) 120 L.F. 84 10,080
8 42"RCP, CL4 (8-10' ) 48 L.F. 88 4,224
9 42"RCP, CL4 (10-12') 80 L.F. 92 7,360
10 36"RCP, CL3 (0-8' ) 448 L.F. 72 32,256
11 30"RCP, CL3 (0-8' ) 326 L.F. 60 19,560
12 30"RCP, CL4 (8-10' } 172 L.F. 64 11,008
13 30"RCP, CL4 (10-12' ) 86 L.F. 68 5,848
14 30"RCP, CL4 (12-14'J 186 L.F. 72 13,392
15 30"RCP, CL5 (14-16') 230 L.F. 76 17,480
16 30"RCP, CLS (16-18`) 380 L.F. 80 30,400
17 24"RCP, CL3 (0-8' ) 90 L.F. 48 4,320
18 24"RCP, CL4 (8-10') 46 L.F. 50 2,300
19 24"RCP, CL4 (10-12' ) 40 L.F. 52 2,080
_ 20 18"RCP, CL3 (0-8' ) 111 L.F. 36 3,996
21 18"RCP, CL4 (8-10' ) 40 L.F. 38 1,520
22 18"RCP, CL4 (10-12' ) 75 L.F. 40 3,000
23 15"RCP, CL3 (0-8' ) 376 L.F. 30 11,280
24 12"RCP, CLS (0-8' ) 474 L.F. 24 11,376
25 I2"RCP, CL5 (8-10' ) 92 L.F. 26 2,392
26 12"RCP, CLS (10-12' ) 92 L.F. 28 2,576
27 12"RCP, CL5 (12-14') 40 L.F. 30 1,200
28 MH ��1, 72"RCP, DESIGN F 1 EACH 2,500 2,500
29 MH ��2, 72"RCP, DESIGN F 1 EACH 3,000 3,000
30 MH ��3, 72"RCP, DESIGN F 1 EACH 3,000 3,000
31 MH ��4, 72"RCP, DESIGN F 1 EACH 3,000 3,000
32 CB/MH ��5, 72"RCP,W/RACK 1 EACH 2,800 2,800
33 MH��6, 60"RCP, DESIGN F 1 EACH 2,300 2,300
35 MH��7, 60"RCP, DESIGN F 1 EACH 2,300 2,300
36 MH��8, 60"RCP, DESIGN F 1 EACH 2,600 2,600
37 CB/MH ��9, 48"RCP,W/RACK 1 EACH 1,800 1,800
38 MH��10, 60"RCP, DESIGN F 1 EACH 2,300 2,300
39 MH��11, 60"RCP, DESIGN F 1 EACH 2,500 2,500
40 MH��12, 60"RCP, DESIGN F 1 EACH 3,500 3,500
41 MH��13, 72"RCP, DESIGN F 1 EACH 3,500 3,500
42 MH��14, 48"RCP, DESIGN F 1 EACH 1,800 1,800
43 MH��15, 48"RCP, DESIGN F 1 EACH 1,800 1,800
44 36"CMP WITH FES 1 L.S. 1,500 1,500
45 48"RCP FES � 1 EACH 700 700
46 CURB INLET W/CASTING 15 EACH 1,200 18,000
48 FILTER 26 TON 10 260
49 CLASS IV RIPRAP 26 TON 40 1,040
50 DRIVEWAY REPLACEMENT 1 L.S. 3,000 3,000
" SUBTOTAL $402,Z8$
EXHIBIT D
145TH STREET STORM SEWER
1 21"RCP, CL3 (0-8') 500 L.F. 42 21,000
2 30"RCP, CL3 (0-8') 475 L.F. 60 28,500
3 30"RCP, CL3 (8-10') 475 L.F. 64 30,400
4 36"RCP, CL3 (8-10') 425 L.F. 72 30,600
5 36"RCP, CL4 (10-12') 425 L,F. 76 32,300
6 MANHOLE, DESIGN F 6 EACH 2,000 12,000
7 CURB INLET W/CASTING 11 EACH 1,200 13,200
SUBTOTAL $570,788
ENGINEERING (20X) 114,158
• CONTINGENCIES (20%) 114,158
TOTAL COST $799,103
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