HomeMy WebLinkAbout2.A. Roadway Design Options – Bacardi Avenue Street and Utility Improvements, City Project 452 ROSEN4OUNTITEXECUTIVE SUMMARY
CITY COUNCIL
City Council Work Session: November 5, 2013
AGENDA ITEM: Roadway Design Options - Bacardi
Avenue Street and Utility Improvements, AGENDA SECTION:
City Project 452 Discussion
PREPARED BY: Phil Olson, PE, Assistant City Engineer AGENDA NO. 9,4
ATTACHMENTS: Location Map APPROVED BY:
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RECOMMENDED ACTIONS: Discussion
BACKGROUND:
At the June 18, 2013 regular City Council meeting, the Council authorized the preparation of a feasibility
report for the Bacardi Avenue Street&Utility Improvements, City Project 452. A map illustrating the
project area is attached.
At this time, staff is requesting feedback from Council on the preferred roadway design and project limits.
These preferences will be incorporated into the final feasibility report and final design of plans and
specifications. Utilities will be extended with the roadway improvements in accordance with each
comprehensive utility plan.
Council feedback is being requested now to provide staff with enough direction to begin final design prior
to the completion of the feasibility report. This is necessary because the feasibility report cannot be
completed until the end of November, after the final benefit appraisal is completed. At that point, the
benefit appraisal will be used to verify and/or establish the proposed roadway assessments to be included
in the feasibility report. It is anticipated that the feasibility report will then be received by Council on
December 17, 2013.
Staff is planning to request authorization for final design on November 19, 2013. This accelerated final
design schedule is necessary to allow time for easement acquisition,wetland mitigation, coordination with
State Aid, and coordination with Northern Natural Gas and Xcel Energy. Assuming no further delays,
construction is scheduled to begin in May, 2014.
The following items contain roadway design options and alternatives for project limits. Staff will present
these options at the work session.
G:\ENGPROJ\452\Council Items\20131105 CCWS Roadway Design Options.docx
ROADWAY DESIGN OPTI•NS:
Two, 3-lane roadway designs a:e listed below with a summary of their advantages and disadvantages. Both
designs meet State Aid standard s and are acceptable based on the future density and projected traffic
volumes in this area. The 3-la e design allows vehicles to turn left in a dedicated turn lane independent
from through-traffic. Additio .11y, the 3-lane design allows flexibility for future local roadway connections
to be made at any point along e corridor.
3-lane design: 46-foot wide r i ad
• 12-foot through 1:nes
• 14-foot turn lane-
• 4-foot shoulders
• 8-foot bituminou. trail on both sides of road
• Designed to indu.try standards based on the roadway classification and projected traffic
volumes
• Greater right-of- ay needed from adjacent properties
• Wider shoulders •nd turn lane provide more room and reduce risk of side collisions
• Approximate cos : $1,240,000
3-lane design: 40-foot wide r I ad (Minimum State Aid design for a 3-lane roadway)
• 12-foot through 1:nes
• 12-foot turn lane•
• 2-foot shoulders
• 8-foot bituminou. trail on both sides of road
• Minimum State 'id design for a 3-lane roadway
• Less right-of-way needed from adjacent properties
• Less permanent pact to adjacent properties
• Narrower should rs and turn lane increase risk of side collisions
• Narrower should rs provide more traffic calming than 46-foot design
• Approximate cos $1,160,000 ($80,000 cost savings)
A 40 mph design speed is plan ed for Bacardi Avenue based on the roadway classification and estimated
traffic volumes. A higher speen could easily be accommodated in the design without an increase in cost or
need for additional right-of-wa since the roadway alignment is relatively straight.
For comparative purposes, a o lane roadway was also considered. This option is not recommended due
to safety concerns regarding re.r end collisions between through-traffic and vehicles taking a left-hand
turn. An example of a 2-lane roadway is listed below.
2-lane design: 28-foot wide r i ad (Minimum State Aid design for a 2-lane roadway)
• 12-foot through 1 nes
• 12-foot turn lane•
• 2-foot shoulders
• 8-foot bituminou., trail on both sides of road
• Approximate cos $980,000
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ADDITIONAL DESIGN CONSIDERATIONS:
On-road Bike Lanes:
On-road bike lanes can be add,d to any of the road design options; however,Bacardi Avenue is not listed
in the Pedestrian and Bicycle P an as a planned route for on-road bike lanes. To accommodate bike lanes,
the roadway shoulder is required to be widened to a width of six feet. The shoulder will be signed and
striped as a bike lane. The ad. tional cost for bike lanes is listed below:
• 4-foot shoulders widen-d to 6-foot bike lanes: $60,000
• 2-foot shoulders widen-d to 6-foot bike lanes: $120,000
Street Lights:
Street lights can be added alon:, Bacardi Avenue for an extra cost of approximately$100,000. The City
requires street lights within de elopments but has not historically installed lighting along collector streets.
Recent collector streets that ha e been constructed without street lights include Connemara Trail, 149th
Street West,Akron Avenue, an. Bonaire Path.
PHASED CONSTRUCTIO :
Roadway:
The preferred plan is to cons I ct Bacardi Avenue in one phase from Bonaire Path to 130th Street West.
This is the lowest cost method and least disruptive to the area.
As an option to reduce the upf ont amount of State Aid funds used and leave more funding for different
projects, the roadway could be constructed in two phases. The first phase would extend from Bonaire
Path north of the entrance to e Bella Vista development, and the second phase would extend from there,
up to 130th Street West. For as.essment purposes,it is recommended that the first phase stop at one of
the property lines on the west •ide of Bacardi Avenue. Due to this location and the location of the Bella
Vista entrance, approximately i 0% of the roadway (full width) would need to be constructed with the first
phase. At that point, a tapered road section would be required to transition back to gravel. This is similar
to Akron Avenue,north of Bo aire Path.
A phased approach will reduce the upfront cost of the roadway improvements by approximately 30%.
Long term, the project cost for the ultimate roadway build-out will increase due to inefficiencies during
construction, duplication with e bidding/429 process, multiple easement acquisition processes, and
additional disturbance to residents on Bacardi Avenue. It is difficult to estimate the increase in cost for a
phased approach but it could b- 5%— 10% for construction inefficiencies and 5% for engineering and
administrative work.
Bituminous Trail: West Side
The bituminous trail on the we.t side of Bacardi Avenue could be completed with future developments to
the west. This reduces the cos of both 3-lane roadway designs by approximately$90,000 each and it
eliminates the need for perman-nt right-of-way at this time. Additional drainage and utility easement
would be required but the app •ximate savings for right-of-way/easements is $400,000. The trail could
then be installed concurrent wi developments west of Bacardi Avenue. This approach will require right-
of-way acquisition if all wester properties do not develop or redevelop. It appears that a few lots have
little development potential.
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STATE AID FUNDING:
Surface improvements and eligible storm sewer improvements totaling$1,470,000 are proposed to be
funded through State Aid funds. Completing the roadway improvements in two phases will reduce the
upfront funding to approximately$775,000,a reduction of$465,000. The remaining balance,plus the
increased cost due to phasing will need to be funded in the future.
Storm sewer improvements are estimated to cost approximately$230,000 for any of the roadway designs.
Due to the proposed ponding locations, a majority of the storm sewer will need to be installed with the
first phase if a phased approach is used.
The cost for permanent right-of-way is proposed to also be funded by State Aid. Approximately 3.95
acres of permanent easement is required for the 46-foot wide design,without bike lanes. The estimated
cost for permanent right-of-way is $490,000.
The table below shows the City's anticipated State Aid budget plan. Bacardi Avenue is shown with the 46-
foot wide road design and permanent tight-of-way. Bike lanes and street lights are not included.
Year Project Expenditure Balance
2014 145th St RR Crossing,Bacardi Avenue $2,385,580 ($1,947,512)
2015 ($1,077,512)
2016 $(207,512)
2017 CSAH 42 Bridge at TH 52 $3,125,000 ($2,462,512)
2018 ($1,592,512)
2019 ($722,512)
2020 $147,488
2021 140`h Street East $2,516,598 ($1,499,110)
Listed below are future unfunded projects that would be eligible for State Aid funding. The City may
advance these projects,up to $4,000,000, from the State Aid account without interest,if state funds are
available.
• Akron Avenue (1/2 mile, 50% funded): —$750,000
• Biscayne Avenue (3/4 mile, 50% funded): $1,125,000
• Boulder Avenue ( 1/2 mile, 100% funded): $1,500,000
PROJECT COSTS AND FUNDING:
Below are the estimated project costs for the utility improvements,roadway improvements, and
easements. The utility improvements will be funded by the sanitary sewer core fund,water main core
fund, and storm sewer core fund.
Utility Improvements: $3,120,000
• Sanitary Sewer: $1,950,000
• Water Main: $280,000
• Raw Water Main: $490,000
• Trunk Storm Sewer&Wetland Mitigation: $170,000
• Storm Sewer: $230,000
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Right-of-Way/Easements: $570,000
• Permanent Right-of-Way: $490,000
• Construction Easements and Drainage and Utility Easements: $80,000
Roadway:
• Roadway/Trail Improvements (46-foot wide roadway): $1,240,000
Total Project Cost: $4,930,000
Utilities are required to be extended north to the Well 16 site independent of how the roadway is phased.
Therefore, a phased roadway approach will not greatly reduce the cost of these improvements.
SUMMARY:
Staff is requesting feedback regarding the preferred roadway design and project limits prior to finalizing
the feasibility report. Below is a list of items that require input from Council.
Roadway Design Options:
• 3-lane roadway (46 feet wide): $1,240,000
• 3-lane roadway (40 feet wide): $1,160,000
Additional Design Considerations:
• Street Lights: $100,0000
• 6-foot Bike Lanes
o 4-foot shoulders widened to 6-foot bike lanes: $60,000
o 2-foot shoulders widened to 6-foot bike lanes: $120,000
Construction Phasing
• Single Phase Construction: $4,930,000
• Multiple Phase Construction: Lower initial cost but higher overall cost
• Delay Construction of Bituminous Trail: West Side
o Reduction of$90,000 for trail and $400,000 for right-of-way
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