12/20/2021 - City Council - Work Session - AgendasSPRING PARK
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CITY OF SPRING PARK
WORK SESSION AGENDA
DECEMBER 20, 2021- 6:00 PM
SPRING PARK CITY HALL
(Work Session discussion times are approximate)
1. 6:00 - Black Lake Road Update
2. 6:25 - Discussion on Establishing a Policy for the Burying of Electric Utilities
4. 6:50 -Adjourn
EXECUTIVE SUMMARY
The proposed project will include:
• Reconstruction of Black Lake Road from Shoreline Drive (CSAH-15) to 2494
Black Lake Road.
• Drainage Improvements.
• Sanitary and Watermain Utility improvements.
Proposed utility improvements include replacement of the sanitary sewer main, manholes
and water main piping, valves and fire hydrants. In addition to the main line replacements
the sewer and water service lines will be replaced to the Right -of -Way limits. The roadway
improvements will include widening the street to 20-feet between the back of the concrete
curb and gutter on both sides of the road. Drainage improvements will include adding
catch basins and replacing the storm sewer discharge pipes to the lake. The roadway will
be surfaced with a 3.5" bituminous pavement.
The estimated cost of the street, storm sewer, sanitary sewer and water systems
improvements is $1,866,500. The roadway and storm sewer portion of the project
estimated to be $803,000 is eligible to be assessed to benefitting properties at a cost of
$7792 per parcel, but the City Council has decided to change the policy to eliminate the
assessments for roadway and drainage improvements.
The City may be eligible for reimbursement for I&I improvements through the MCES I&I
Grant. Costs not covered by Grants or Sewer and Water funds will be covered by the
City's General Obligation Funds and Bonding.
As an alternate for consideration with this project is converting the overhead power to
underground power and the construction of standalone streetlights. The additional cost
to complete these improvements is estimated to be $250,000. If the council determines
that completing the undergrounding of the power and streetlights is feasible a separate
assessment calculation will be completed and this work will proceed as separate project
an additional public hearing at a later date.
It is the recommendation of the engineer that this project is feasible and cost effective as
outlined in this report and we recommend moving forward with public hearing in
assessments in accordance with State Statue 429.
City of Spring Park - Feasibility Report
FR-1
Sambatek Project No. 21963
1. PROJECT AREA CHARACTERISTICS
Existing Conditions
Black Lake Road is a dead-end street serving a residential neighborhood with 26
abutting homes that has an aging infrastructure that needs replacement.
Right -of -Way - The platted right-of-way is 16-feet wide with a 10-foot permanent
easement on the east side of the road throughout the entire length of the roadway. The
currently roadway width is generally 16-feet but does vary in certain locations. The
existing roadway does not follow platted right-of-way and is outside of the right-of-way in
several locations. There are several locations where private improvements are
encroaching into the right-of-way. The 10-foot permanent easement has been identified
on the record drawing as -built plan from the 1963 sewer improvement project. This
easement will need to be verified to ensure that it was recorded and legal.
Utilities -The sanitary sewer, watermain and storm sewer servicing the residents along
Black Lake Road were constructed in 1963 and are currently 58 years old. The 8-inch
Vitrified Clay Pipe (VCP) sanitary sewer and 6-inch Cast Iron Pipe (CIP) water main
exist along the approximate centerline of Black Lake Road. Based on project records
and sanitary sewer televising reports, there have been minimal improvements made to
the sanitary sewer, water main and storm sewer systems since their installation in the
mid-1960s.
Roadway - The roadway last received improvements that included some patching and a
bituminous overlay in 1993 making this pavement 28 years old. The current paved road
width varies throughout this corridor but is generally 16 feet wide. The existing roadway
does not follow the alignment of the platted right-of-way in all locations, with portions of
the pave surfacing outside of the right-of-way. In other locations there are encroachments
by driveways and landscaping of the residences along Black Lake Road see Figure 1.
The existing right of way appears to be 16 feet wide with a 10-foot permanent easement
to the east side of the roadway as indicated on as -built drawings from the 1963
construction. Easements and right of way areas would need to be confirmed during the
feasibility of the project.
Pedestrian Accommodations — There are currently no pedestrian accommodations along
this section of roadway.
2. PROPOSED IMPROVEMENTS
Sanitary Sewer and Water Main
Two alternatives were considered for replacing the sanitary sewer and watermain
including trenchless technology with cured in place pipe (CIPP) for the sanitary sewer
and pipe bursting to replace the watermain. The second alternative looked at replacing
City of Spring Park - Feasibility Report FR-2
Sambatek Project No. 21963
January 3, 2022
the sewer and watermain with conventional methods or excavating, removing and
replacing the pipe with new materials.
Trenchless methods are generally used where:
1. Pavement is in good condition and does not need to be replaced.
2. Where a trenchless method can save time and allow better access to properties or.
3. Where a trenchless method would be cost effective compared to an overly deep
excavation.
Traditional, excavate, remove and replace methods are typically chosen for the following
reasons.
1. Pavement is going to be replaced due to age and poor conditions
2. Where services lines to homes need to be replaced.
3. Where digging depths are not excessive and
4. Where the traditional methods are less costly.
After meeting with a reputable contractor to discuss the pros and cons of traditional
excavating methods versus trenchless methods we are recommending that the sewer
and water be replaced with the traditional methods for the following reasons.
1. Due to the limited right-of-way, pipe bursting pits would not allow traffic to access
homes on a daily basis and therefore would not provide a benefit over excavating
methods.
2. The age and materials of the service lines requires that the service line from the
main to the property line be replaced. Even with trenchless methods for the main
line replace and excavating from the centerline of the road to each home would be
required to replace the service lines. With tradition excavation methods the
connection to sewer and watermain are easier to complete and can be completed
with a higher level of confidence that the connection will not leak and will provide
a much longer service line.
3. Sanitary sewer manholes can be replaced with new manholes versus spray lining
the old manholes and therefore will further reduce I&I and provide a lower long
term life cycle cost.
4. Traditional methods can be completed at a lower cost with minimal additional
disruption to access or homes on the roadway.
The water main on Black Lake Road is fed from three locations. The watermain will be
replaced with 8" C-900 PVC from Shoreline Drive (TH15) to House number 2494 and
approximately 10-feet of the lines feeding the Black Lake Road water main from
Interlachen Road via Channel Road and Rose Hill Drive. The project will include the
replacement of gate valves and hydrants in addition to corporation stops, services from
main to property line, and curb stop box and valves.
The sanitary sewer will be replaced with 8" PVC Pipe and new precast concrete manholes
and casting, and each home will receive a new service line wye and PVC service line pipe
to the property line.
City of Spring Park - Feasibility Report FR-3
Sambatek Project No. 21963
January 3, 2022
Minnesota Department of Health will conduct a plan review of the project as it pertains to
water main improvements.
Street Construction
Right of Way -Black Lake Road
The existing roadway width varies throughout the corridor but is generally 16 feet wide.
State fire code guidance on minimum roadway width for two-way traffic is 20 ft. Therefore,
road widening will be necessary. As indicated in the ROW paragraph above, there are
existing encroachments along the corridor which will be considered in the final design of
the project. A typical road width of 20-feet from curb face to face will be the goal but will
be adjusted to 18-feet wide as necessary to avoid existing obstacles. To allow for a 20-
foot roadway from face of curb to face of curb, we will need to provide a 24-foot-wide
combination of right-of-way and permanent easement to allow for the construction of the
road. Temporary easements or right of entry may be required to complete the sanitary
sewer and water service line connections to the individual homes.
The existing street section will be reconstructed with a new typical section with 3.5" of
bituminous surfacing and a Class 5 aggregate base to provide a 7-ton design. The new
street section will include a ribbon concrete curb and gutter in most locations and where
required to control drainage a B618 curb & gutter will be used.
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City of Spring Park - Feasibility Report FR-4
Sambatek Project No. 21963
January 3, 2022
Storm Drainage
Black Lake Road - The project will include installation of new storm sewer pipe and catch
basins at project low points. The new system will direct and capture flow and address
spread issues in high intensity rain events. Stormwater treatment devices are proposed
to aid in the removal of pollutants prior to discharging to the lake. Revised MS4
requirements that go into effect for the 2022 construction season require treatment of
existing impervious areas. Due to site constraints which include limited ROW areas, these
devices are intended to provide this required treatment. Where excessive runoff on the
lake side of the road is causing problems, B618 Curb & Gutter will be used to prevent
runoff or reduce the amount of onto private properties.
The storm sewer will be designed to current City standards for a five-year storm event.
No changes to the existing drainage patterns are proposed.
3. IMPACT OF PROPOSED IMPROVEMENTS
The proposed street improvements will not create new maintenance issues for the Public
Works staff. The City will work with affected property owners and the Contractor to resolve
any situations that may arise during construction. Short term traffic delays, construction
dust and noise, and erosion may occur. Efforts to minimize these impacts include the
restriction of work hours and dust and erosion control measures included in the project.
Any disruptions that occur to existing yards, sprinkler systems, and driveways will be
restored.
4. OPINION OF PROBABLE COST
Sambatek Project No: 21963
Description: Black Lake Road Street and Utility Improvements
Cost Item Percent Amount
Construction Costs
Street and Drainage Improvements $ 823,000*
Water and Sanitary Sewer Improvements $1,083,500
Total Construction Costs $1,886,500
Note: Construction Costs include a 20%
Contingency.
"Includes $150,000 for ROW Costs and Fees
noted below.
Administrative Costs
Engineering 15% $236,000
Assessment 1 % $15,700
City of Spring Park - Feasibility Report FR-5
Sambatek Project No. 21963
January 3, 2022
Legal
Administration
Capitalized Interest
Bonding
Total Administrative Costs
TOTAL ESTIMATED PROJECT COSTS
5. PROJECT FINANCING
1 % $15,700
1 % $15,700
1 % $15,700
1 % $15,700
$314,500
Grants — The city will continue to pursue any available grant funding or low interest loans
through the Met Council I&I program for the replacement of the sanitary sewer.
Assessments — The current city assessment policy allow for up to 25% of the Roadway
Improvement cost to be assessed on accordance with State Statute Section 429. The
Assessment Policy states that the replacement of existing sewer and water mains and
services lines will not be assessed.
Street improvements can be assessed by the unit or by the adjusted front foot method.
There are 26 properties that will benefit from the roadway improvements to Black Lake
Road with varying front footage from 39' to 70' of abutting frontage. The adjusted front
footage method could be applied to this project, but it would be our recommendation to
use the Unit method of Assessments. The preliminary assessment for roadway, storm
sewer and right-of-way acquisitions for this project would be 25% of $803,000 or
$200,750 or $7,721.15 per parcel assuming 26 equal assessments. The council would
need to set the terms of the assessment including length of payback and interest rate.
If the option to underground the power and construction a standalone streetlight system
at an estimate cost of $250,000 the council would need to determine an appropriate
assessment and or method of financing this cost.
6. PROJECT SCHEDULE
• Council Accepts the Feasibility Report and Orders Public Hearing ..............December 20, 2021
• Public Hearing.................................................................................... January 3, 2022
• Authorize the preparation of the Plans and Specifications ............................. January 3, 2022
• Approve the Plans and Specifications and Authorize the Ad for Bid...................March 7 , 2022
• Open Bids...............................................................................................April 18, 2022
• Award of Bids........................................................................................... May 2, 2022
• Begin Construction......................................................................................June, 2022
• Complete Construction...............................................................................August ,2022
Note: If the council decides to move forward with placing the power underground and
construction a new streetlight system a separate public hearing will be held. It is assumed
that the underground power and streetlights would be constructed at the same time as
the street work. A separate assessment hearing would be held after the bids are opened
but prior to awarding the bids or after the construction has been completed to ensure the
City of Spring Park - Feasibility Report FR-6
Sambatek Project No. 21963
January 3, 2022
project costs are finalized. The assessment public hearing dates can be adjusted based
on the council's preference for before or after construction is completed.
7. SUMMARY AND RECOMMENDATION
The project as proposed addresses deteriorating infrastructure needs along Black Lake
Road. Several alternatives for utility replacement have been reviewed and it has been
determined that the sanitary sewer and water utilities will be replace by conventional open
trench methods. The roadway will be widened up to a width of 20-feet to meet state fire
codes where possible and concrete curb & gutter will be provided to control drainage
along the roadway with storm sewer treatment structures provided to enhance the water
quality of the discharge to the lake. Additional right-of-way or permanent easement will
be required in several areas and the final requirements will be determined during the
preliminary design stages.
The City Council has determined that the abutting properties will benefit from the
improvements and that assessments in accordance with the City Assessment Policy will
be levied in accordance with the State Statutes with a public hearing scheduled prior to
approving the project and an assessment hearing held after the costs of the project has
been determined.
The project has been determined to be feasible and cost effective and provides for the
long-term needs of the abutting properties and community and the recommendation is to
move forward with this project.
City of Spring Park - Feasibility Report FR-7
Sambatek Project No. 21963
January 3, 2022
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41, Hydrants Sanitary Line Size
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Gate Valve
Proposed Sanitary CIPP lining 8"
Sanitary Manhole Water System Sanitary Lift Station Parcels
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