HomeMy WebLinkAbout10A Status of Annexation Area 6.2W 4646 Dakota Street SE
`y'Ar LsoT�" Prior bake, MN 55 372
CITY COUNCIL AGENDA REPORT
MEETING DATE: MARCH 7, 2011
AGENDA #: 10A
PREPARED BY: STEVE ALBRECHT, DIRECTOR OF PUBLIC WORKS
PRESENTER: STEVE ALBRECHT
AGENDA ITEM: CONSIDER APPROVAL OF A REPORT ON THE STATUS OF
ANNEXATION AREA 6.2
DISCUSSION: Introduction
The purpose of this agenda item is to update the City Council on the status
of Annexation Area 6.2.
History
On February 17, 2010 the Annexation Committee including City Council
Members Keeney and Hedberg, the City Manager, City Attorney and City
Staff convened to discuss issues related to Area 6.2
Area 6.2 as shown on the attached map is located in the northwest corner
of Spring Lake. Currently several homes adjacent to the lake have failing
or non - compliant septic systems. There are 25 homes located on Sunset
Avenue and 13 homes located along CR 12.
In December 2010 Scott County completed extension of a forcemain past
the intersection of CR 12 and CR 17. This forcemain was constructed to
allow a future forcemain connection from the Sunset Avenue area. The
forcemain is located about 900 feet west of Sunset Avenue.
Watermain is available 1,500 feet east of the eastern most properties along
CR 12.
Scott County proposes to reconstruct this segment of CR 12 in 2016 at
which time the City had planned to extend utilities.
Current Circumstances
The Township believes the City should have annexed this area in 2006
when the utilities along CR 12 were installed near Stemmer Ridge Road,
The City Attorney and Staff have reviewed the Annexation Agreement and
do not believe that is a correct interpretation of the Orderly Annexation
Agreement. While it is true sanitary sewer and watermains are physically
extended to Area 6.2 there is not sufficient treatment capacity within the
existing system to serve the entire area; and therefore because the system
lacks capacity to serve the area utilities are not available. The existing City
Sanitary Sewer in this area has a limited capacity estimated to be about 38-
40 homes in addition to the Scott County Maintenance Facility. Capacity to
serve all of area 6.2 will not be available until the future sanitary sewer is
extended south from CR 82. For those reasons the City has not annexed
this area.
The Annexation Committee has recommended that the City complete a
joint feasibility study with the Township to determine whether it is feasible
to extend sewer and water to these properties. If the utility extension is
deemed feasible the Committee has recommended the City proceed with
annexation of area 6.2.
Conclusion
The City Council should direct staff to work with the Township to complete
a feasibility study to determine if it is feasible to extend sanitary sewer and
watermain to these properties.
ISSUES: There are several issues related to the utility extension. Until the CR 12
project is completed in 2016 -2017 it may not be feasible to extend water to
Sunset Avenue or provide sanitary sewer to the 13 properties located along
CR 12. The costs of the sanitary sewer and associated road construction
costs may be excessive due to the small area being served. Because
these costs will be assessed it will be necessary to prove benefit in
accordance with State Statute 429.
FINANCIAL The City budgeted $20,000 in the Sanitary Sewer Fund budget for 2011 to
IMPACT: complete a feasibility study related to annexation Area 6.2. Township and
City Staff have agreed the study costs should be split 50/50 and that the
Township Engineer (Bonestroo) should provide a cost for the study. The
cost estimate will be available for discussion at the March 7th City Council
meeting.
ALTERNATIVES: The alternatives are as follows:
1. Direct City Staff to work with Township Staff to complete a jointly
funded Sanitary Sewer and Water Extension Feasibility Study for
Annexation Area 6.2.
2. Table the Resolution for a specific reason.
3. Deny the Resolution.
RECOMMENDED Alternative 1.
MOTION:
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2335 Highway 36 W
St. Paul, MN 55113
T el 651-636-4600
Fax 651-636-1311
www.bonestroo.com
March 3, 2011
Kathy Nielsen Steve Albrecht
Clerk City Engineer/PWD
Spring Lake Township City of Prior Lake
20381 Fairlawn Avenue 4646 Dakota Street SE
Prior Lake, MN 55372 Prior Lake, MN 55372-4245
Re: Sunset Avenue Sewer Extension
Township of Spring Lake/City of Prior Lake
Temp. Bonestroo File No.: 001862-11000-0
Dear Kathy and Steve:
At your request we have prepared a scope of work and proposal for the completion of a
Feasibility Report for the extension of sanitary se wer service to the Sunset Avenue neighborhood
along the west side of Spring Lake. Additiona lly, the report will look at sewering those homes
along the northwest shore of the lake east of the intersection of Sunset Ave. and CSAH 12.
We have entitled the report: “Sunset Avenue Sewer Extension”, because this is the primary
purpose for the proposed project. However, given the difficulty of installing sewer without
substantial disturbance to the street, it would be prudent to also examine the feasibility of a
simultaneous extension of water service to these homes. Finally, given the existing condition of
the pavement, and its necessary disturbance, we will report on the cost of a reconstruction of the
street.
Project Understanding
Need for a Project
The Sunset Avenue area is part of an orderly annexation agreement between the City of Prior
Lake and Spring Lake Township. Its annexati on was programmed for 2006. To date, the area
has not been annexed. The City and Township inte nd to work to clarify the annexation status as
soon as possible.
Putting the issue of annexation aside, both the city and township recognize the immediate need
for the extension of city sewer service to the area. Homes have experienced failing septic
systems and have found it difficult or impossible to find an alternate site for the installation of a
replacement on-site system. This situation has caused two main concerns. One is the obvious
environmental issues arising from failing system s and the increased cost to homeowners who
must operate on a septic tank which needs frequent pumping. The second is that the lack of a
viable sewer site for a particular property makes it impossible to sell or significantly modify the
current structure. Both issues are su bstantial and require expedited action.
Sewer
The city’s Comprehensive Sanitary Sewer Plan calls for this area to have gravity sewer drain to a
lift station near the intersection of Sunset Ave. and CSAH 12. This lift station is planned in
phases, with the initial phase being a small statio n and forcemain, routed to the north and into
th
the gravity main on 165 St. Ultimately, most of the western part of the City’s growth would
drain to this lift station, which would be upsized and given a larger forcemain, routed to the east.
It is our understanding that the City has a standa rd Lift Station design which will be provided to
us for inclusion in the report. Additionally, the Ci ty will soon be bidding a similar lift station which
should provide good, real world costs for use in our estimate.
Since the publication of the Comprehensive Plan, a sanitary sewer forcemain has been installed
along CSAH 17 which serves the County’s Highwa y Department. This fo rcemain has been sized
to accept additional flows from the Sunset Ave. area. Our report will assume that the lift station
will pump into that forcemain, with the ultimate plan remaining the same.
The project will endeavor to serve most or all of the homes along Sunset Ave. and along CSAH
12, in the project area, with gravity service to thei r basements (if any). If providing this level of
service to an individual home or small group of homes adds unreasonable costs to the project
which could be eliminated by offering grinder pu mp or ejector pump service, this would likely be
the recommendation. The study will also examine the fact that cabins without basements may
likely redevelop as a larger home with a basement.
Water
While the primary purpose of the project is to extend sewer service to the neighborhood, it is
prudent to examine the feasibility of simultaneous ly extending water service as well. The City’s
existing water main ends at the west limits of th e reconstructed portion of CSAH 12. It was the
City’s intention to extend this water main in conjunction with the final stage of the CSAH 12
reconstruction (the County recently reprogra mmed the roadway improvements for 2016 in the
current County TIP). This project has been desi gned and the plans include a location for the
proposed water main. We will determine if the wa ter main can be installed ahead of the road
construction in either the designed location or an alternate location which will not impeded the
future reconstruction project or necessitate moving the main at that time. Additionally, if we are
to install the water main, we would need to do so without substantial disturbance to the existing
county road and within existing rights-of-way.
Streets
Sunset Avenue will most certainly have to be dist urbed to install a gravity sanitary sewer system.
The extent of that disturbance will likely make pa tching it as expensive as a full removal and
replacement of the bituminous. Given the existing condition of Sunset Ave., it likely makes sense
to complete a full reconstruction of the roadway.
Assuming this area will ultimately be annexed in to the City, we would look to reconstruct the
road to the City’s standard section. It is our understanding that the City’s minimum street width
is 28 feet (back of curb to back of curb). The current roadway varies in width from 22 to 24 feet
wide. We will examine reconstruction options to minimize the need for wetland mitigation and
storm water treatment facilities.
The homes east of Sunset Ave. are served off of CSAH 12, which will be reconstructed at a future
date by the County.
Financing
Throughout project development, we will utilize the Chapter 429 assessment process, enabling
either the City or Township to assess benefiting pr operties all, or a portion of, the costs. If the
project moves forward as a City project, the Chapter 429 process would need to begin after
annexation, starting with the ordering of the fe asibility report. The process could be expedited
since the report would already be complete.
Other financing sources may be explored to suppl ement assessments, especially for elements of
the project which may have more regional benefit such as trunk water main or the sanitary sewer
lift station and forcemain.
Schedule
It would be possible to move through the Chapte r 429 process and take bids by early summer.
Construction could begin in mid to late su mmer and be completed by the end of the 2011
construction season. If the two parties do not wish to pursue this a ggressive schedule, the
project could be completed in any other year’s construction season.
Scope
Data Gathering and Research
This task involves compiling and reviewing the pertinent documents associated with the project
including:
1. Record plans for CSAH 12, CSAH 17 Forcemain
2. Design plans for CSAH 12 (remaining portion of reconstruction)
3. Topographic survey information for CSAH 12
4. Comprehensive Sewer and Water plans for Pr ior Lake (Bonestroo has these already)
5. Standard Lift Station plan from Prior Lake
6. Other Prior Lake City Standards such as Street Typical Section, etc.
Prior Lake city staff have already been helping to gather this information.
Field Investigation
As a first step, we would complete a preliminary field investigation consisting of the following
tasks (this assumes we do not complete a pr eliminary topographic survey; if a topographic
survey is completed, items 1 and 4 this investigation could be eliminated):
1. Run level loop through the project
a. Shoot first floor elevations
b. Determine which homes have a basement (does not include actual measurement
of basement depth)
c. Establish benchmarks near site.
2. Take extensive pictures of the site to docu ment pre-project conditions and for use in
design, etc.
3. Engineer and Construction Inspector walk the site to look at critical issues, etc.
4. Document existing conditions such as:
a. Street width
b. Pavement condition
c. Culvert locations, sizes, etc.
d. Private Utility locations, possible conflicts, etc.
Sewer Design
The feasibility level sewer design will deal with ev aluating the necessary depth of the lift station if
gravity service is going to be made available to a ll existing homes’ basements. This analysis will
then also look at alternate (shallower) depths if some homes were served with grinder stations or
ejector pumps. The approximate route of the sani tary sewer would also be evaluated to find the
most efficient location. There are three basic al ternatives for the sewer route along Sunset Ave.:
East Boulevard, West Boulevard and in the center of the street. Each option would be briefly
analyzed.
The report will examine an appropriate location fo r the sanitary sewer lift station and determine if
there are any property rights which need to be acquired as part of the project.
Water Design
If water service is to be a part of the project, it is our assumption that the street reconstruction
would also be a part of it since putting both the sewer and water in the boulevard would not be
possible. Therefore, the route of the water ma in would be in the street. Preliminary valve,
hydrant and other water main feature locations would be laid out.
Street/Storm Water Design
A street reconstruction based on the City of Prior Lake’s standards would be investigated.
Alternate designs may be proposed to help mini mize the need for wetland mitigation and/or
storm water treatment best management practice s (BMPs). Basic calculations for impervious
surface areas, etc. would be completed as necessa ry to make preliminary assumptions as to the
need for storm water BMPs. Full hydraulic calculatio ns would not be a part of this study’s scope.
The study’s cost estimate and design would be based on rough calculations and rule-of-thumb
assumptions.
Assessments/Financing
The feasibility study would meet the requirements of Chapter 429 by showing the area to be
assessed and outlining possible assessment rates and scenarios. Additionally, the study will
examine the appropriateness of funding sources be yond assessments. It is assumed that the
City and Township will engage the services of a qualified financial advisor to assist with a bond
sale or other more complex financing arrangements.
Schedule
A detailed schedule will be provided with the st udy, including steps necessary to complete the
Chapter 429 requirements.
City/Township Staff Meetings
The scope of this proposal shall include two (2 ) formal staff meetings, at appropriate times
during the report preparation, with bo th City and Township staff present.
City Council/Township Board Meetings
The scope of this proposal includes attendance at a City Council and Township Board meeting,
respectively, to present or assist in presenting the report.
In general, the scope of work presented herein ends with the presentation of the completed
report to the City Council and Township Board. If, upon approval of the Feasibility Report, the
City Council and Township Board move to call for a Public Hearing, we can provide an additional
scope of work from there.
Additional Services
Preliminary Topographic Survey
A preliminary topographic survey could be provided if the City and Township desire to have this
work incorporated into the study. This work wo uld add a higher level of certainty to the design
and cost estimate because of the increased level of detailed information available in preparation
of the report.
Public Involvement
At some point during the development of the proj ect, it may be appropriate to hold a public
involvement meeting to receive input on the scope of the project from the affected
neighborhoods. Bonestroo would prepare grap hics, handouts and other such items for the
meeting. We would attend the meeting, take notes, and provide a summary of the public
comments received.
This meeting should be considered separate from the formal Public Improvement Hearing.
Other Possible Additional Services
Additional meetings
Additional options for routes for sewer or water
Lift Station design
Wetland delineation
Permitting
Funding Applications
Graphic Art for presentations
Mailings
Schedule
If the City Council and Township Board were able to give authorization for the report by March
10, 2011, the report could be co mpleted in time for the April 14, 2011 Township Board meeting
and any subsequent City Council meeting.
The completion of a preliminary survey would be dependent on snow cover.
Fees
Fee Summary
The following table summarizes our estimated fees . Reimbursable expenses are included in the
figures below.
Item Cost
Data Gathering/Review $650
Field Investigation $2,200*
Report Preparation $9,700
Staff Meetings $1,650
City Council/Twp. Board Mtg. No charge
Total $14,200
*Take $1000 off this cost if Prelim.
Survey is completed.
Additional Services
Public Involvement Meeting $2,400
Preliminary Survey (CSAH 12) $3,700
Preliminary Survey (Sunset Ave.) $3,700
Sincerely,
BONESTROO
Mark Statz, PE
Township Engineer
651-604-4709
Attachments: Project Area Sketch
Cc: Larry Poppler – Assistant City Engineer – City of Prior Lake
Mike Hirsch - Bonestroo
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