HomeMy WebLinkAbout6.d. Receive Feasibility Report, Chili / Chippendale Intersection, City Project #179DATE: FEBRUARY 9, 1988
TO: MAYOR & COUNCILMEMBERS
C/O ADMINISTRATOR JILK
FROM: CITY ENGINEER/PUBLIC WORKS DIRECTOR HEFTI
RE: ITEMS FOR THE FEBRUARY 16, 1988 COUNCIL MEETING
NEW BUSINESS
Project X179, Receive Feasibility Report
Chili/Chippendale Intersection
At Staffs request and recommendation at the December 1, 1987 meeting, Council
ordered the preparation of the feasibility study to determine the engineering
feasibility and the estimated cost for reconstructing the Chili/Chippendale/145th
Street Intersection to make a new 4 -way intersection. This would replace the two
existing offset T-shaped intersections that are posing traffic problems and
hazards. Our Consultant has completed the feasibility study, a copy of which is
attached, and found that the project is feasible from an engineering standpoint
at an estimated cost of $80,000. Council should note that the total construction
cost does not include cost for obtaining the necessary easements for the proposed
realignment.
Staff feels that this proposed solution to the current traffic operational
problems and hazards which exist with the current alignment should be put before
the School District for their comments because the extent of the operational
problems are the result of the school using Chili Avenue as a main access. In
pursuing this with the School District I would, with Councils authorization,
request the School District consider contributing to the cost of this project.
If the School District considers making a contribution that we feel is equitable,
which would make this project more palatable, then I would like to meet with the
affected property owners to inform them of the proposed project.
Therefore, I would recommend that Council receive the feasibility report for
Project #179, Chili/Chippendale Intersection Improvements and direct Staff to
pursue a cost sharing arrangement with the School District.
FEASIBILITY REPORT
ON
145TH STREET
INTERSECTIONS AT CHIPPENDALE AVENUE
AND CHILI AVENUE
ROSEMOUNT, MINNESOTA
CITY PROJECT NO. 179
SEH FILE NO: 88123
February 16, 1988
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
the laws of the State ofiMinnesota.
DATE: January 22, 1988 REG. NO. 9089
REVIEWED BY:
DATE:
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ENGINEERS ■ ARCHITECTS ■ PLANNERS
January 22, 1988
222 EAST LITTLE CANADA ROAD, ST PAUL, MINNESOTA 55117 612 484-0272
RE: ROSEMOUNT, MINNESOTA
145TH STREET, CHIPPENDALE AVE.
AND CHILI AVENUE INTERSECTIONS
CITY PROJECT NO. 179
SEH FILE NO: 88123
Honorable Mayor and Council
City of Rosemount
2875 145th Street West
Rosemount, MN 55068
Attention: Rich Hefti, City Engineer
Gentlemen:
In accordance with your authorization, we have prepared the
attached feasibility study for the intersections of 145th Street
at Chippendale Avenue and Chili Avenue. This report updates
information previously gathered as part of other studies in the
area and considers in more detail the long range permanent
solution to the operational problems with the divided inter-
sections.
We will be available to review this report in detail with you
upon request
Respectfully submitted,
SHORT-ELLIOTT-HENDRICKSON, INC.
00�
Steve Campbell
SDC/cih
Enclosure
SHORT ELLIOTT ST PAUL, CHIPPEWA FALLS,
HENDRICKSON INC. MINNESOTA WISCONSIN
TABLE OF CONTENTS
TITLE PAGE
CERTIFICATION
LETTER OF TRANSMITTAL
TABLE OF CONTENTS
AUTHORIZATION
SCOPE
DESIGN CONSIDERATIONS
PROPOSED IMPROVEMENTS
RIGHT-OF-WAY AND EASEMENTS
COST ESTIMATES
PROJECT DISTRICT
APPENDIX A - DETAILED COST ESTIMATES
AUTHORIZATION
The City Engineer/Public Works Director in a letter dated
December 2, 1987 requested the preparation of a feasibility study
for revising the intersections of 145th Street at Chili Avenue
and Chippendale Avenue into a single, four-way intersection. A
work program was submitted to the City on December 21, 1987 and,
following a January 11 meeting, was revised and resubmitted to
the City on January 19, 1988. The report was authorized to
provide information relating to the cost, potential property
impacts and operational considerations associated with the final
improvement to the intersection.
1 SCOPE
This report is based primarily on a single alternate considera-
tion which is to realign Chippendale Avenue and Chili Avenue to a
single intersection at 145th Street. The intersection of Dodd
Boulevard and Chippendale Avenue would also be realigned to
provide maximum distance between the 145th Street intersection
and the Dodd Boulevard intersection. This study is a follow up
to previous studies, meetings and deliberations by the City staff
and SEH staff relative to operational problems at the existing
intersections. Some conceptual designs have been prepared for
revising the two separate intersections to provide for better
turning radii, providing turn lanes on 145th Street and
relocating the Dodd Boulevard and Chippendale Avenue inter-
section. Operational studies included the potential for
signalization of the two intersections, evaluation of different
methods of stop sign control and a combination of flashers and
. warning signs.
After review of the many alternates which are available, it was
felt that a final study of the realignment of the streets to
provide a single intersection would provide the best permanent
solution.
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DESIGN CONSIDERATIONS
Chili Avenue was constructed in the early 1970's as a typical
residential street 32 feet wide. It provides a connection to the
west entrance to Rosemount Senior High School and also provides
access to a residential area. All adjacent residential
properties face the cross streets, such as 143rd Street, but
several have driveways which access onto Chili Avenue.
Chippendale Avenue was formerly County Road 39 and was rebuilt by
Dakota County approximately ten years ago. In conjunction with
the reconstruction, the intersection of 145th Avenue, Chippen-
dale Avenue and Dodd Boulevard was reconstructed to provide a
single T intersection on 145th Street and a second T inter-
section immediately south with Dodd Boulevard.
145th Street is approximately 40 feet in width east of Chili
Avenue. Through the intersection. area, it becomes wider before
ultimately returning to a 24 foot width west of Cimarron Avenue.
The area in the northwest corner of the intersection is largely
an open field and was part of an older farm type development.
Some trees remain. The area in the southeast corner consists of
a single family residential unit with a significant side yard
between the building and Chippendale Avenue. There is a rather
large triangle of old right-of-way from Dodd Boulevard which
still remains in the southeast corner.
Most traffic on Chili Avenue is associated with the school or the
adjacent residential complex. At times, there is a significant
amount of school bus traffic and school related volumes become
quite high. Chippendale Avenue to the south also carries a
significant volume of traffic as it is a major connector between
145th Street and County Road 42. The importance of Dodd
Boulevard has significantly diminished because of its cul-de-sac
near the County Road 33 and County Road 42 intersections. The
connection of Shannon Parkway between 145th Street and County
Road 42 will further diminish the importance of Dodd Boulevard as
a carrier of traffic.
The close proximity of two major intersections along 145th Street
creates a number of operational problems. The most noticeable
problem is the weave made by traffic which utilizes -both
Chippendale Avenue and Chili Avenue. The weaving movement
requires traffic to pull out into 145th Street, accelerate and
then quickly decelerate to make a left turn to the other street.
This start and stop maneuver in heavy traffic can lead to some
driver confusion and potential accidents.
There is also potential, and sometimes realized, congestion which
reaches from one intersection to the other. In the morning rush
hour, left turning traffic to go north on Chili Avenue forces
some backup of traffic to and sometimes through the Chippendale
Avenue intersection. The reverse is true for evening rush hour,
left turning traffic to go south on Chippendale can back up to
the Chili intersection.
A third concern with the split in the intersections is the
pedestrian paths. Some pedestrians utilize the south side of
145th Street to either eventually cross at the east side of Chili
Avenue. Other pedestrians cross on either the east or west side
of Chippendale Avenue. Occasionally, pedestrians will cross
between the intersections taking advantage of either a gap in
traffic ory stopped traffic.
There is also backup on both Chili Avenue and Chippendale Avenue
caused by either the offset or the heavy traffic movements. it
is very difficult to make a southbound left turn in the morning
rush hour. Any left turn will significantly backup traffic
because of the lack of gaps in both eastbound and westbound
traffic on 145th Street. Similarly, northbound traffic on Dodd
Road has a difficult time making a left turn because of the
backup of eastbound traffic from Chili Avenue and the restricted
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sight distance this backup creates. The backup on Chippendale
Avenue will occasionally completely block the Dodd Road inter-
section. Similarly, the lines of traffic on Chili Avenue in the
evening rush hour can extend back and block 144th Street.
The City recently installed stop signs on 145th Street stopping
westbound traffic on Chili Avenue and eastbound traffic on
Chippendale Avenue. This temporary measure has reduced some of
the congestion which has occurred on 145th Street, primarily as a
result of backups associated with left turns from 145th Street.
However, this measure also creates some driver confusion because
of the unusual arrangements of stop signs. Motorists who
approach an intersection see a stop sign for one conflicting
movement and assume that the opposite conflicting movement also
has a stop sign. This obviously is not true for southbound Chili
' Avenue traffic since the westbound traffic stops but the east-
bound does not A supplementary sign beneath the stop sign has
attempted to alert motorists to this abnormal situation. This
temporary stop sign measure also does not reduce the weaving
1 problems, only slightly reduces some of the accelerate/decelerate
concerns and problems, and has no impact or possibly even a
negative impact on pedestrian movements by leading pedestrians
into a false sense of security.
PROPOSED IMPROVEMENTS
It is proposed to revise the intersections to a single four-way
intersection on 145th Street. A conceptual alignment is shown in
Figure 1. Chippendale Avenue is slightly relocated to the east
and a single curve south of Dodd Boulevard will permit the
relocation of the centerline of the intersection approximately 50
feet to the east. The angle of intersection of 145th Street and
Chippendale Avenue would be approximately 70 degrees. The
relocation to the east will require some additional right-of-way
in the corner of the property.
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Dodd Boulevard would also be relocated further south to a new
intersection on Chippendale Avenue. A single curve on Dodd
Boulevard would result in Dodd Boulevard being realigned to an
' east/west alignment at the new intersection with Chippendale
Avenue. The angle of intersection would also be 70 degrees.
A reverse curve would be constructed for Chili Avenue between
144th Street and 145th Street. This would permit the realignment
to match the relocated centerline of Chippendale Avenue. A
tangent section would be provided at both the 145th Street and
144th Street intersections.
The width of revised Chippendale and Chili Avenues would be
increased to provide for two lanes of approach to 145th Street
from both northbound and southbound directions. The additional
1 width would be necessary to provide for turning movements and, in
the case of Chippendale Avenue and Dodd Boulevard, would provide
for a bypass of left turning traffic.
' RIGHT OF WAY AND BASEMENTS
Right-of-way will be required from three separate parcels for the
proposed improvement. A small triangular area of the property in
the southeast corner will be required for the realignment of
Chippendale Avenue. A triangle of property will also be required
from the side yard of the single family residence in the
southeast corner of the intersection of Chippendale Avenue and
Dodd Boulevard. This also will be a relatively small area.
A major acquisition of right-of-way will be required for the
relocation of Chili Avenue. This taking will remove a signifi-
cant portion of the buildable area which is now vacant. As part
of the right-of-way acquisition, the existing driveway from the
inplace residence should also be relocated to Chili Avenue.
In conjunction with the acquisition of right-of-way, some
additional right-of-way could be available for return to private
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ownership. However, there are several private and public
utilities which exist under Chili Avenue, Chippendale Avenue and
Dodd Boulevard. The return of property to private ownership
would therefore be subject to easements for utilities and it is
doubtful that any buildable lots or additional buildings on
existing lots could be provided.
The driveways for the two residences on the east side of Chili
Avenue will need to be extended. The driveway for the property
on the southeast corner of Chili Avenue and 144th Street would
need to be extended a short amount because of the curve in Chili
Avenue. The driveway extension for the residence on the
northeast corner of Chili Avenue and 145th Street would be
' increased by approximately 60 feet.
1 COST ESTIMATE
The construction cost of the relocation of Chili Avenue,
Chippendale Avenue and Dodd Boulevard is estimated to cost
approximately $80,000. This does not include easement
acquisition costs or costs for any relocation of utilities,
assuming that all would be left inplace except those which must
be moved for construction.
PROJECT DISTRICT
The following properties and entities would be most impacted by
the construction of this project:
Carrollton Addition
Outlot A
Motz's Addition
Block 1, Lots 16, 15
Rahn's 4th Addition
' Block 1, Lot 1
Section 30
1 34-03010-030-95
Independent School District 196
ESTIMATE OF COST
CITY PROJECT NO. 179
ROSEMOUNT, MINNESOTA
ITEM
UNIT
NO. DESCRIPTION
UNIT
QUANTITY
PRICE
AMOUNT
2104.501
REMOVE CONCRETE CURB
AND GUTTER
L.F.
1400
1.50
$ 2,100
2105.501
COMMON EXCAVATION
C.Y.
2600
2.50
6,500
2105.521
GRANULAR BORROW (CV)
C.Y.
3100
4.50
130,950
2105.525
TOPSOIL BORROW (LV)
C.Y.
300
8.00
2,400
2211.503
AGGREGATE BASE PLACED,
CLASS 5
C.Y.
700
10.00
7,000
2341.504
BITUMINOUS MATERIAL
FOR MIXTURE
TON
35
175.00
6,125
2341.508
WEARING COURSE MIX.
TON
320
14.00
4,480
2341.510
BINDER COURSE MIXTURE
TON
320
13.00
4,160
2531.501
CONCRETE CURB & GUTTER,
DESIGN B618
L.F.
1450
5.00
7,250
2575.505
SODDING
S.Y.
2700
2.00
5,400
SUBTOTAL
+10$ CONTINGENCIES
ESTIMATED CONSTRUCTION COST
+20$ OVERHEAD & ENGINEERING
TOTAL ESTIMATED COST
$59,365
5,635
$65,000
15,000
$80,000
144 TH' ST. W. _
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EXISTING R/W
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EXISTING CURB LINE
III
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NO SCALE
DR#WAYS
PROPOSED CURB LINE
700
145 TH ST. W. _
REMOVE EXISTING J
STREET SURFACE
CONCEPTUAL ALIGNMENT FILE NO.
AAW 145TH STREET a CHIPPENDALE/ CHILI 88123
ENGINEERS 0 ARCHffECTS.PLANNERS INTERSECTION REVISION FI Gi R E.