CC Staff Report 6-22-20CITY COUNCIL STAFF REPORT
Monday, June 22, 2020
Subject Approve a Request for Setback Variances to Install a Septic System in the NW Corner of
Property Located at 565 Lakota Lane
Section CONSENT AGENDA Item No: D.3.
Prepared By MacKenzie YoungWalters, Associate
Planner
File No:
PROPOSED MOTION
The City Council approves a variance allowing the placement of the pump line, tanks, mound, and dispersal area
within the 50foot bluff setback area and 20foot bluff impact zone, and a 10foot property line setback variance for
the mound and dispersal area, subject to the conditions of approval, and adopt the attached Findings of Fact and
Recommendation.
Approval requires a Simple Majority Vote of members present.
SUMMARY
During the septic system inspection required as part of the sale of the home, the septic system at 565 Lakota Lane
was determined to be failing. This determination requires that the septic system be replaced. Due to the location of the
house and bluff, the only viable location for a septic system is in the front yard, partially within the city’s rightofway.
The applicant is requesting a variance to place the pump line, tanks, mound, and dispersal area within the 50foot bluff
setback area and 20foot bluff impact zone, and a 10foot property line setback variance for the mound and dispersal
area to accommodate this placement. A variance is required because Chapter 19 requires that septic systems be
setback 10 feet from property lines and 50 feet from the top of the bluff, and Chapter 20 prohibits the removal or
alteration of vegetation and grading within 20 feet from the top of a bluff.
A full analysis of the requested variance is provided in the attached staff report.
BACKGROUND
County records indicate that the home was built in 1967.
On October 14, 1991, the city passed Ordinance No. 152, which created the city’s Bluff Protection Ordinance.
On August 22, 1994, the city expanded the Bluff Protection Ordinance to cover the entire city.
On February 8, 1999, the city passed Ordinance No. 289, which governed the installation and maintenance of septic
systems and established a 20foot bluff setback.
CITY COUNCIL STAFF REPORTMonday, June 22, 2020SubjectApprove a Request for Setback Variances to Install a Septic System in the NW Corner ofProperty Located at 565 Lakota LaneSectionCONSENT AGENDA Item No: D.3.Prepared By MacKenzie YoungWalters, AssociatePlanner File No: PROPOSED MOTIONThe City Council approves a variance allowing the placement of the pump line, tanks, mound, and dispersal areawithin the 50foot bluff setback area and 20foot bluff impact zone, and a 10foot property line setback variance forthe mound and dispersal area, subject to the conditions of approval, and adopt the attached Findings of Fact andRecommendation.Approval requires a Simple Majority Vote of members present.SUMMARYDuring the septic system inspection required as part of the sale of the home, the septic system at 565 Lakota Lanewas determined to be failing. This determination requires that the septic system be replaced. Due to the location of thehouse and bluff, the only viable location for a septic system is in the front yard, partially within the city’s rightofway.The applicant is requesting a variance to place the pump line, tanks, mound, and dispersal area within the 50foot bluffsetback area and 20foot bluff impact zone, and a 10foot property line setback variance for the mound and dispersalarea to accommodate this placement. A variance is required because Chapter 19 requires that septic systems besetback 10 feet from property lines and 50 feet from the top of the bluff, and Chapter 20 prohibits the removal oralteration of vegetation and grading within 20 feet from the top of a bluff.A full analysis of the requested variance is provided in the attached staff report.BACKGROUNDCounty records indicate that the home was built in 1967.On October 14, 1991, the city passed Ordinance No. 152, which created the city’s Bluff Protection Ordinance.On August 22, 1994, the city expanded the Bluff Protection Ordinance to cover the entire city.On February 8, 1999, the city passed Ordinance No. 289, which governed the installation and maintenance of septic
systems and established a 20foot bluff setback.
On May 14, 1999, the city issued a permit for a garage addition.
On May 23, 2011, the city passed Ordinance No. 523, adopting Carver County Ordinance 672010 by reference
and establishing the current 50foot bluff setback for septic systems.
On November 28, 2016, the city received notice of a nonimminent failing sewage treatment system at 565 Lakota
Lane.
On June 2, 2020 the Planning Commission held a public hearing and voted unanimously to recommend that the City
Council approve the requested variance.
DISCUSSION
During the June 2, 2020 public hearing, no member of the public spoke for or against the requested variance.
During the June 2, 2020 Planning Commission meeting, the Commissioners asked the following:
1. Is the applicant obligated to replace the system?
Response: Yes, the nonimminent failure notice requires that the system be replaced within a set period of time.
2. Could the existing system be repaired/rebuilt in its existing location?
Response: It is staffs' understanding that the soils in the existing area would not accommodate a new/rebuilt
system.
Previous variances for septic systems within bluff setbacks were also discussed. Staff noted that many older properties
with nonconforming bluff setbacks are beginning to turn over and staff is expecting to see more variances like this in
the future.
RECOMMENDATION
Staff recommends that the City Council approve a variance allowing the placement of the pump line, tanks, mound,
and dispersal area within the 50foot bluff setback area and 20foot bluff impact zone, and a 10foot property line
setback variance for the mound and dispersal area, subject to the following conditions of approval, and adopt the
attached Findings of Fact and Recommendation:
1. The applicant must apply for and receive all necessary permits from the relevant agencies.
2. The applicant must show proposed erosion control on survey and install erosion control as needed to prevent
offsite erosion.
3. The septic system must be located as proposed in the survey and design received by the city on May 1, 2020
as part of the variance request.
4. The property owner shall enter into an Encroachment Agreement with the city for the area of the individual
sewage treatment system (septic system) that encroaches into the public easement. The final area of
encroachment shall be determined by an asbuilt survey of the septic system, and the Encroachment Agreement
shall be recorded prior to issuance of the Certificate of Compliance.
5. All underground components encroaching into the public easement and identified in the Encroachment
Agreement shall be detectable by customary locating equipment (i.e. the installation of tracer wire). The tracer
wire shall be tested and approved prior to issuance of the Certificate of Compliance.
CITY COUNCIL STAFF REPORTMonday, June 22, 2020SubjectApprove a Request for Setback Variances to Install a Septic System in the NW Corner ofProperty Located at 565 Lakota LaneSectionCONSENT AGENDA Item No: D.3.Prepared By MacKenzie YoungWalters, AssociatePlanner File No: PROPOSED MOTIONThe City Council approves a variance allowing the placement of the pump line, tanks, mound, and dispersal areawithin the 50foot bluff setback area and 20foot bluff impact zone, and a 10foot property line setback variance forthe mound and dispersal area, subject to the conditions of approval, and adopt the attached Findings of Fact andRecommendation.Approval requires a Simple Majority Vote of members present.SUMMARYDuring the septic system inspection required as part of the sale of the home, the septic system at 565 Lakota Lanewas determined to be failing. This determination requires that the septic system be replaced. Due to the location of thehouse and bluff, the only viable location for a septic system is in the front yard, partially within the city’s rightofway.The applicant is requesting a variance to place the pump line, tanks, mound, and dispersal area within the 50foot bluffsetback area and 20foot bluff impact zone, and a 10foot property line setback variance for the mound and dispersalarea to accommodate this placement. A variance is required because Chapter 19 requires that septic systems besetback 10 feet from property lines and 50 feet from the top of the bluff, and Chapter 20 prohibits the removal oralteration of vegetation and grading within 20 feet from the top of a bluff.A full analysis of the requested variance is provided in the attached staff report.BACKGROUNDCounty records indicate that the home was built in 1967.On October 14, 1991, the city passed Ordinance No. 152, which created the city’s Bluff Protection Ordinance.On August 22, 1994, the city expanded the Bluff Protection Ordinance to cover the entire city.On February 8, 1999, the city passed Ordinance No. 289, which governed the installation and maintenance of septicsystems and established a 20foot bluff setback.On May 14, 1999, the city issued a permit for a garage addition.On May 23, 2011, the city passed Ordinance No. 523, adopting Carver County Ordinance 672010 by referenceand establishing the current 50foot bluff setback for septic systems.On November 28, 2016, the city received notice of a nonimminent failing sewage treatment system at 565 LakotaLane.On June 2, 2020 the Planning Commission held a public hearing and voted unanimously to recommend that the CityCouncil approve the requested variance.DISCUSSIONDuring the June 2, 2020 public hearing, no member of the public spoke for or against the requested variance. During the June 2, 2020 Planning Commission meeting, the Commissioners asked the following:1. Is the applicant obligated to replace the system? Response: Yes, the nonimminent failure notice requires that the system be replaced within a set period of time.2. Could the existing system be repaired/rebuilt in its existing location?Response: It is staffs' understanding that the soils in the existing area would not accommodate a new/rebuiltsystem. Previous variances for septic systems within bluff setbacks were also discussed. Staff noted that many older propertieswith nonconforming bluff setbacks are beginning to turn over and staff is expecting to see more variances like this inthe future.RECOMMENDATIONStaff recommends that the City Council approve a variance allowing the placement of the pump line, tanks, mound,and dispersal area within the 50foot bluff setback area and 20foot bluff impact zone, and a 10foot property linesetback variance for the mound and dispersal area, subject to the following conditions of approval, and adopt theattached Findings of Fact and Recommendation:1. The applicant must apply for and receive all necessary permits from the relevant agencies.2. The applicant must show proposed erosion control on survey and install erosion control as needed to preventoffsite erosion.3. The septic system must be located as proposed in the survey and design received by the city on May 1, 2020as part of the variance request.4. The property owner shall enter into an Encroachment Agreement with the city for the area of the individualsewage treatment system (septic system) that encroaches into the public easement. The final area ofencroachment shall be determined by an asbuilt survey of the septic system, and the Encroachment Agreementshall be recorded prior to issuance of the Certificate of Compliance.5. All underground components encroaching into the public easement and identified in the Encroachment
Agreement shall be detectable by customary locating equipment (i.e. the installation of tracer wire). The tracer
wire shall be tested and approved prior to issuance of the Certificate of Compliance.
ATTACHMENTS:
Staff Report
Findings of Fact (Approval)
Variance Document
Development Review Application
Narrative
Survey
Septic Documents
Engineering Memo
ERC Memo
Public Hearing Notice and Affidavit of Mailing List
CITY OF CHANHASSEN
PC DATE: June 2, 2020
CC DATE: June 22, 2020
REVIEW DEADLINE: June 30, 2020
CASE #: 2020-7
BY: MW
SUMMARY OF REQUEST:
During the septic system inspection required as part of the sale of the home, the septic system at
565 Lakota Lane was determined to be failing. This determination requires that the septic system
be replaced. Due to the location of the house and bluff, the only viable location for a septic
system is in the front yard, partially within the city’s right-of-way. The applicant is requesting a
variance to place the pump line, tanks, mound, and dispersal area within the 50-foot bluff setback
area and 20-foot bluff impact zone and a 10-foot property line setback variance for the mound
and dispersal area to accommodate this placement. A variance is required because Chapter 19
requires that septic systems be setback 10 feet from property lines and 50 feet from the top of the
bluff, and Chapter 20 prohibits the removal or alteration of vegetation and grading within 20 feet
from the top of a bluff.
LOCATION: 565 Lakota Lane
(PID 251300010)
APPLICANT: Francisco & Heather
Lynn Silva
565 Lakota Lane
Chaska, MN 55318
PRESENT ZONING: A-2
2030 LAND USE PLAN: Residential
Low Density
ACREAGE: 2.57 DENSITY: NA
PROPOSED MOTION:
“The Chanhassen Planning Commission recommends that the City Council approve a variance
allowing the placement of the pump line, tanks, mound, and dispersal area within the 50-foot
bluff setback area and 20-foot bluff impact zone and a 10-foot property line setback variance
for the mound and dispersal area.”
565 Lakota Lane
Planning Case #2020-7
Page 2
LEVEL OF CITY DISCRETION IN DECISION-MAKING:
The city’s discretion in approving or denying a variance is limited to whether or not the proposed
project meets the standards in the Zoning Ordinance for a variance. The city has a relatively high
level of discretion with a variance because the applicant is seeking a deviation from established
standards. This is a quasi-judicial decision.
Notice of this public hearing has been mailed to all property owners within 500 feet.
PROPOSAL/SUMMARY
The applicants recently
purchased this property. During
the purchasing process, they
were informed that the septic
system was in a state of non-
imminent failure and would
need to be replaced. The
existing septic system is located
within the bluff behind the
house, and due to the location
of the house and bluff, the only
location on the property that
can accommodate a new septic
system is the northwest corner.
This location is within the 50-foot bluff setback, the 20-foot bluff impact zone, and 10-foot
property line setback. It will also require the city to issue an Encroachment Agreement allowing
a portion of the dispersal area to be located within the right-of-way.
The mound for the proposed septic system will be within one foot of the front lot line and the
dispersal area will cross the lot line and encroach approximately eight feet into the right-of-way.
The mound will also be about 22 feet from the top of the bluff and the dispersal will be around 2
feet from the top of the bluff. The tanks will be located approximately one foot from the top of
the bluff, with the sewer line being about five feet from the top of the bluff at its closest point.
The applicant has stated that it is not possible to place the septic system on the southern portion
of the property and that the proposed northwest corner is the only approved location. The
applicant has further noted that they must replace the septic system in a timely manner due to the
fact that the system is non-compliant.
APPLICABLE REGULATIONS
Chapter 1 - General Provisions, Section 1-2, Rules of Construction and Definitions
565 Lakota Lane
Planning Case #2020-7
Page 3
Chapter 19 - Water, Sewers and Sewage Disposal, Article IV, Subsurface Sewage Treatment
Systems, Sec. 19-67, Amendments
Chapter 20 - Zoning, Article II, Division 3, Variances
Chapter 20 - Zoning, Article II, Division 4, Nonconforming Uses
Chapter 20 - Zoning, Article X, “A-2” Agricultural Estate District
Chapter 20 - Zoning, Article XXVIII, Bluff Protection, Sec. 20-1403, Removal or Alteration of
Vegetation
Chapter 20 - Zoning, Article XXVIII, Bluff Protection, Sec. 20-1404, Topographic
Alterations/Grading and Filling
Note: Most of the applicable setback standards are located in Chapter 19; however, Chapter 19
does not have a specific variance procedure so the variance is being granted from the general
zoning code using the procedure outlined in Chapter 20.
BACKGROUND
County records indicate that the home was built in 1967.
On October 14, 1991, the city passed ordinance number 152, which created the city’s bluff
protection ordinance.
On August 22, 1994, the city expanded the bluff protection ordinance to cover the entire city.
On February 8, 1999, the city passed ordinance number 289, which governed the installation and
maintenance of septic systems and established a 20-foot bluff setback.
On May 14, 1999, the city issued a permit for a garage addition.
On May 23, 2011, the city passed ordinance number 523, adopting Carver County Ordinance 67-
2010 by reference and establishing the current 50-foot bluff setback for septic systems.
On November 28, 2016, the city received notice of a non-imminent failing sewage treatment
system at 565 Lakota Lane.
SITE CONDITIONS
The property is zoned Agricultural Estate District (A2) and contains a bluff. This zoning district
requires lots to be a minimum of 2.5 acres, have front yard and rear setbacks of 50 feet, side yard
setbacks of 10 feet, and limits parcels to a maximum of 20 percent (20%) lot coverage.
Structures are required to be 30 feet or the existing distance from the top of the bluff, with no
topographic or vegetative alterations permitted within 20 feet from the top of the bluff. Chapter
19 requires septic systems to be setback 50 feet from bluffs and 10 feet from property lines.
565 Lakota Lane
Planning Case #2020-7
Page 4
The existing house structure is approximately 34 feet from the front property line, with a front
patio about 27 feet from the front property line, and the home is setback around six feet from the
top of the bluff. The existing septic system is located within the 50-foot bluff setback and 20-foot
bluff impact zone. There is also a shed located on the bluff. The property meets all other
requirements of its zoning district.
NEIGHBORHOOD
Bluffview Addition
The plat for this area was
recorded in November of
1958. This plat predates the
formation of the city and
since the plat was recorded,
the zoning code was
adopted and amended
multiple times, including
provisions governing the
location of structures and
septic systems relative to
bluffs. The homes in the
area are of older
construction, built between
1964 and 1984, and most do
not conform to the city’s
current bluff ordinance.
Variances within 500 feet:
1974-03 535 Lakota Lane: Road Realignment as part of a subdivision - Approved*
1982-05 608 Flying Cloud Drive: Development in unsewered lot (Recreational Water Slide) -
Denied
*From the file it is not clear why realigning the road required a variance and was not just handled
as part of the subdivision.
ANALYSIS
Proposed Location
565 Lakota Lane
Planning Case #2020-7
Page 5
As the above illustration shows, the majority of the northern section of the property is encumbered
by the 50-foot bluff setback and once the locations of the house, well, and existing septic line are
taken into account, the northwestern corner of the lot is the possible location for a septic system.
The applicant has moved the system as close to the northern lot line as possible in order to minimize
the encroachment into the bluff impact zone and has positioned the mound outside of the most
sensitive area of the bluff; however, this location has resulted in the mound being located one foot
from the front lot line and its dispersal area extending into the right-of-way.
Typically, staff is strongly opposed to anything being located within the right-of-way; however, in
this case the proposed encroachment is a subsurface rock bed that should not include any other
underground components. Due to the minimally intrusive nature of the proposed encroachment, the
Engineering Department has indicated that they would be willing to grant an Encroachment
Agreement to permit the installation of the rock bed within the right-of-way. The Engineering
Department’s full comments and required conditions can be found in the attached memo.
While staff would prefer that nothing be located within the bluff impact zone, staff recognizes that
in this case it is simply not possible to design a system that will maintain a 20-foot setback from the
top of the bluff. Staff also recognizes that the portions located within the bluff impact zone are all
subsurface in nature and should not pose a risk to the integrity of the bluff, provided adequate
precautions are taken during construction and that the area is revegetated post construction.
565 Lakota Lane
Planning Case #2020-7
Page 6
Due to the lack of alterative locations and the in recognition of the fact that the proposed location
minimizes to the intent practicable the impact on the bluff, staff recommends approving the required
variances.
Southern Location
The slope near the southwestern corner of the property does level off enough
that a septic system could theoretically be sited; however, there is no practical
way to access that location. In order to install a system in that location, the
installer would either have to traverse approximately 500 feet of steep slopes,
significantly disrupting the existing vegetation, or obtain permission to bring
equipment in through the Hennepin County Regional Railroad authority’s
property to the south of 565 Lakota Lane.
Staff does not believe it would be possible for the homeowner to obtain
permission to bring equipment in though the bike and pedestrian trail, and
accessing the southwestern corner of the property from Lakota Lane is not
practical. For these reasons, staff agrees with the homeowner’s statement that
the northwest corner of the property is the only viable location for a new
septic system.
Impact on Neighborhood
The largest impact on the neighborhood would be the anticipated loss of trees in the proposed
location of the rock bed within the city’s right-of-way. While the loss of tree screening is
regrettable, 4 of the 10 houses on Lakota Lane are readily visible from the road and the loss of 565
Lakota Lanes vegetative buffer will not be a radical departure from the street’s existing aesthetic.
Since most components of the septic system are below ground, it is not expected to have a
significant impact on the neighborhood.
SUMMARY
Staff believes that the proposed location is the only viable location for a new septic system on the
property and that the applicant has made every effort to locate the system as far as possible from the
top of the bluff. Staff also believes that the proposed system and its location will have a minimal
impact on the surrounding properties.
RECOMMENDATION
Staff recommends that the Chanhassen Planning Commission recommend that the City Council
approve a variance allowing the placement of the pump line, tanks, mound, and dispersal area
within the 50-foot bluff setback area and 20-foot bluff impact zone and a 10-foot property line
setback variance for the mound and dispersal area, subject to the conditions of approval and
adopt the attached Findings of Fact and Recommendation:
565 Lakota Lane
Planning Case #2020-7
Page 7
1. The applicant must apply for and receive all necessary permits from the relevant
agencies.
2. The applicant must show proposed erosion control on survey and install erosion control
as needed to prevent offsite erosion.
3. The septic system must be located as proposed in the survey and design received by the
city on May 1, 2020 as part of the variance request.
4. The property owner shall enter into an Encroachment Agreement with the city for the
area of the individual sewage treatment system (septic system) that encroaches into the
public easement. The final area of encroachment shall be determined by an as-built
survey of the septic system, and the Encroachment Agreement shall be recorded prior to
issuance of the Certificate of Compliance.
5. All underground components encroaching into the public easement and identified in the
Encroachment Agreement shall be detectable by customary locating equipment (i.e. the
installation of tracer wire). The tracer wire shall be tested and approved prior to issuance
of the Certificate of Compliance.
Should the Planning Commission recommend denying the variance request, it is recommended
that the Planning Commission adopt the following motion and attached Findings of Fact and
Decision:
“The Chanhassen Board of Appeals and Adjustments recommends that the City Council deny the
variance request to place the pump line, tanks, mound, and dispersal area within the 50-foot bluff
setback area and 20-foot bluff impact zone and deny the 10-foot property line setback variance
for the mound and dispersal area, and adopt the attached Findings of Fact and Decision.”
ATTACHMENTS
1. Findings of Fact and Recommendation Approval
2. Findings of Fact and Recommendation Denial
3. Development Review Application
4. Narrative
5. Certificate of Survey
6. Miscellaneous Septic Documents
7. Engineering Memo
8. Environmental Resources Coordinator Memo
9. Public Hearing Notice and Affidavit of Mailing
G:\PLAN\2020 Planning Cases\20-07 565 Lakota Lane VAR\Staff Report-565 Lakota Lane_PC.doc
1
CITY OF CHANHASSEN
CARVER AND HENNEPIN COUNTIES, MINNESOTA
FINDINGS OF FACT
AND RECOMMENDATION
(APPROVAL)
IN RE:
The application of Francisco and Heather Lynn Silva for the installation of a septic system
within the required bluff setback, impact zone, and front setback on a property zoned A2 -
Planning Case 2020-07.
On June 2, 2020, the Chanhassen Planning Commission, acting as the Board of Appeals and
Adjustments, met at its regularly scheduled meeting to consider the application. The Planning
Commission conducted a public hearing on the proposed variance preceded by published and
mailed notice. The Board of Appeals and Adjustments makes the following:
FINDINGS OF FACT
1. The property is currently zoned Agricultural Estate District (A2).
2. The property is guided in the Chanhassen Comprehensive Plan for Residential Low Density.
3. The legal description of the property is:
Lot 1, Bluffview Addition
4. Variance Findings – Section 20-58 of the City Code provides the following criteria for the
granting of a variance:
a. Variances shall only be permitted when they are in harmony with the general purposes
and intent of this Chapter and when the variances are consistent with the comprehensive
plan.
Finding: The intent of the city’s bluff protection ordinance is to ensure that vegetation
and soils located near and on bluffs are not distributed in a manner that has the potential
to create erosive conditions or otherwise negatively impact the bluff. The configuration
of the property and location of the existing home make it impossible to place a septic
system on the property outside of the required bluff setback. The applicant has proposed
a placement as far as possible from the top of the bluff in order to minimize the impact on
the bluff impact zone. Staff believes that the proposed location will have a minimal
impact on the integrity of the bluff.
The city also requires septic systems to be setback from property lines and road right of
ways in order to minimize the potential for these systems to negatively impact adjacent
property owners or interfere with the installation of utilities or other features commonly
found in right of ways. In this case, the Engineering Department believes that the rockbed
2
can be located within the right-of-way without interfering with the function of the right-
of-way. Additionally, by granting a variance to the property line setbacks, the required
bluff setback variance is minimized and the septic system can be placed further away
from the top of the bluff.
Granting a variance to allow a single-family home with no ability to hook up to
municipal utilities to install a septic system is consistent with the comprehensive plan,
and the proposed variance is in harmony with the intent of the zoning code.
b. When there are practical difficulties in complying with the zoning ordinance. "Practical
difficulties," as used in connection with the granting of a variance, means that the
property owner proposes to use the property in a reasonable manner not permitted by this
Chapter. Practical difficulties include, but are not limited to, inadequate access to direct
sunlight for solar energy systems.
Finding: Due to the existence of bluffs on the property, the dimensions of the property,
the placement of the house, nature of the contours, and characteristics of the soil, the
septic system must be placed in the northwest corner of the property. This placement
requires variances from the bluff setbacks, impact zone, and property line setbacks. City
sewer and water will not be available for the property in the near future and a functioning
septic system is required to have reasonable use of the property
c. That the purpose of the variation is not based upon economic considerations alone.
Finding: The variance request is not solely based upon economic considerations.
d. The plight of the landowner is due to circumstances unique to the property not created by
the landowner.
Finding: The lot is a non-conforming lot of record that was created before the existing
district standards, bluff protection, and septic system ordinances were created.
e. The variance, if granted, will not alter the essential character of the locality.
Finding: Many components of the septic system would be located below grade and would
not be expected to have any visual impact on the neighborhood. While the proposal will
likely require the removal of several trees within the city’s right-of-way, almost half of the
other homes along Lakota Lane are easily visible from the road and this would not represent
a departure from neighborhood standards. The surrounding residential properties are also
located on large lots and are served by septic systems.
f. Variances shall be granted for earth sheltered construction as defined in Minnesota
Statutes Section 216C.06, subdivision 14, when in harmony with this Chapter.
Finding: This does not apply to this request.
5. The planning report #2020-07, dated June 2, 2020, prepared by MacKenzie Young-Walters,
is incorporated herein.
3
RECOMMENDATION
“The Chanhassen Board of Appeals and Adjustments recommends that the City Council
approves the placement of the pump line within the 50-foot bluff setback area and the 20-foot
bluff impact zone, a 30-foot bluff setback variance for the tanks and a 20-foot bluff and 9-foot
property line setback variance for the mound and dispersal area, subject to the conditions of
approval:
1. The applicant must apply for and receive all necessary permits from the relevant
agencies.
2. The applicant must show proposed erosion control on survey and install erosion control
as needed to prevent off-site erosion.
3. The septic system must be located as proposed in the survey and design received by the
city on May 1, 2020 as part of the variance request.
4. The property owner shall enter into an Encroachment Agreement with the city for the
area of the individual sewage treatment system (septic system) that encroaches into the
public easement. The final area of encroachment shall be determined by an as-built
survey of the septic system, and the Encroachment Agreement shall be recorded prior to
issuance of the Certificate of Compliance.
5. All underground components encroaching into the public easement and identified in the
Encroachment Agreement shall be detectable by customary locating equipment (i.e. the
installation of tracer wire). The tracer wire shall be tested and approved prior to issuance
of the Certificate of Compliance.
ADOPTED by the Chanhassen Planning Commission this 2nd day of June, 2020.
CITY OF CHANHASSEN
BY:
Steve Weick, Chairman
1
CITY OF CHANHASSEN
CARVER COUNTY, MINNESOTA
VARIANCE 2020-07
1. Permit. Subject to the terms and conditions set forth herein, the City of Chanhassen hereby
grants the following variance:
The Chanhassen City Council approves a variance allowing the placement of the pump
line, tanks, mound, and dispersal area within the 50-foot bluff setback area and 20-foot
bluff impact zone and a 10-foot property line setback variance for the mound and
dispersal area.
2. Property. The variance is for a property situated in the City of Chanhassen, Carver County,
Minnesota, and legally described as Lot 1, Bluffview Addition.
3. Conditions. The variance approval is subject to the following conditions:
1. The applicant must apply for and receive all necessary permits from the relevant
agencies.
2. The applicant must show proposed erosion control on survey and install erosion control
as needed to prevent off-site erosion.
3. The septic system must be located as proposed in the survey and design received by the
city on May 1, 2020 as part of the variance request.
4. The property owner shall enter into an Encroachment Agreement with the city for the
area of the individual sewage treatment system (septic system) that encroaches into the
public easement. The final area of encroachment shall be determined by an as-built
survey of the septic system, and the Encroachment Agreement shall be recorded prior to
issuance of the Certificate of Compliance.
2
5. All underground components encroaching into the public easement and identified in the
Encroachment Agreement shall be detectable by customary locating equipment (i.e. the
installation of tracer wire). The tracer wire shall be tested and approved prior to issuance
of the Certificate of Compliance.
4. Lapse. If within one (1) year of the issuance of this variance the allowed construction has not
been substantially completed, this variance shall lapse.
Dated: June 22, 2020 CITY OF CHANHASSEN
BY:
(SEAL) Elise Ryan, Mayor
AND:
Todd Gerhardt, City Manager
STATE OF MINNESOTA )
(ss.
COUNTY OF CARVER )
The foregoing instrument was acknowledged before me this day of ,
2020 by Elise Ryan, Mayor, and Todd Gerhardt, City Manager, of the City of Chanhassen, a
Minnesota municipal corporation, on behalf of the corporation and pursuant to authority granted by
its City Council.
NOTARY PUBLIC
DRAFTED BY:
City of Chanhassen
7700 Market Boulevard
P.O. Box 147
Chanhassen, MN 55317
(952) 227-1100
COMMUNITY DEVELOPMENT DEPARTMENT
Planning Division —7700 Market Boulevard
Mailing Address—P.O. Box 147, Chanhassen, MN 55317
Phone: (952) 227-1300/ Fax: (952) 227-1110
APPLICATION FOR DEVELOPMENT REVIEW
Submittal Date I ( ( aL PC Date 4 I a DG' CC Date Id I /4C)60-Day Review Date L /3c,./
Section 1: Application Type (check all that apply)
Refer to the appropriate Application Checklist for required submittal information that must accompany this application)
Comprehensive Plan Amendment 600 Subdivision (SUB)
Minor MUSA line for failing on-site sewers $100 Create 3 lots or less 300
Conditional Use Permit (CUP)
Create over 3 lots (
lots) $
600 +15 per lot
Single-Family Residence 325 Metes & Bounds (2 lots) 300
All Others 425 Consolidate Lots 150
71Interim Use Permit (IUP)
r] Lot Line Adjustment 150
In conjunction with Single-Family Residence..$325
17) Final Plat 700
All Others 425 Includes $450 escrow for attorney costs)*
Additional escrow may be required for other applications
through the development contract
Rezoning (REZ)
Planned Unit Development (PUD) 750 Vacation of Easements/Right-of-way(VAC) $300
Minor Amendment to existing PUD 100 Additional recording fees may apply)
All Others 500
Q Variance (VAR). 200
Sign Plan Review 150
Wetland Alteration Permit (WAP)
Site Plan Review (SPR) LI Single-Family Residence 150
Administrative 100 All Others 275
Commercial/industrial Districts' 500
Plus $10 per 1,000 square feet of building area: Zoning Appeal 100
thousand square feet)
Include number of ex: gemployees Zoning Ordinance Amendment (ZOA) 500
Include number of new employees
Residential Districts 500 ligJ : When ngdtlpleapplications are processed concurrently,
Plus $5 per dwelling unit (units)
the appeoprlaletire*d be charged for each application.
Q Notification Sign (City to install and remove) 200
Q Property Owners'List within 500' (City to generate after pre-apphcation meeting)3 per address
11 addresses)
Escrow for Recording Documents (check all that apply)50 per document
Conditional Use Permit Interim Use Permit Site Plan Agreement
El Vacation Variance Wetland Alteration Permit
Metes & Bounds Subdivision (3 docs.)Easements ( easements) Deeds
TOTAL FEE: SSD I
Section 2: Required Information
Description of Proposal:
Property Address or Location: 565 LAKOTA LANE
251300010 BLUFFVIEW ADDITION LOT 001Parcel#:Legal Description:
Total Acreage:
2 57
Wetlands Present? Yes ® No
Present Zoning: Agricultural Estate District (A2) Requested Zoning: Agricultural Estate District (A2)
Present Land Use Designation: Residential Low Der Requested Land Use Designation: Residential Low Densi
Existing Use of Property: SINGLE FAMILY RESIDENCE
Check box if separate narrative is attached.
Section 3: Property Owner and Applicant Information
APPLICANT OTHER THAN PROPERTY OWNER: In signing this application, I, as applicant, represent to have obtained
authorization from the property owner to file this application. I agree to be bound by conditions of approval. subject only to
the right to object at the hearings on the application or during the appeal period. If this application has not been signed by
the property owner, I have attached separate documentation of full legal capacity to file the application. This application
should be processed in my name and I am the party whom the City should contact regarding any matter pertaining to this
application. I will keep myself informed of the deadlines for submission of material and the progress of this application. I
further understand that additional fees may be charged for consulting fees, feasibility studies, etc. with an estimate prior to
any authorization to proceed with the study. I certify that the information and exhibits submitted are true and correct.
Name: Contact:
Address: Phone:
City/State/Zip: Cell:
Email: Fax:
Signature: Date:
PROPERTY OWNER: In signing this application, I, as property owner, have full legal capacity to. and hereby do,
authorize the filing of this application. I understand that conditions of approval are binding and agree to be bound by those
conditions, subject only to the right to object at the hearings or during the appeal periods. I will keep myself informed of
the deadlines for submission of material and the progress of this application. I further understand that additional fees may
be charged for consulting fees, feasibility studies, etc. with an estimate prior to any authorization to proceed with the
study. I certify that the information and exhibits submitted are true and correct.
Name:
FRANCISCO SILVA Contact:
FRANCISCO SILVA
Address:
565 LAKOTA LN Phone:
952-484-9366
City/State/Zip:
CHASKA, MN, 55318 Cell:
Email:
C CO.SILVA3@GMAIL.COM Fax:
Signature: Date: 04/20/2020
This application must co .le in full and must be accompanied by all information and plans required by
applicable City Ordinance provisions. Before filing this application, refer to the appropriate Application Checklist
and confer with the Planning Department to determine the specific ordinance and applicable procedural
requirements and fees.
A determination of completeness of the application shall be made within 15 business days of application submittal. A
written notice of application deficiencies shall be mailed to the applicant within 15 business days of application.
PROJECT ENGINEER (if applicable)
Name: Contact:
Address: Phone:
City/State/Zip: Cell:
Email: Fax:
Section 4: Notification Information
Who should receive copies of staff reports? Other Contact Information:
0 Property Owner Via: 0 Email 0 Mailed Paper Copy Name:
HEATHER SILVA
Applicant Via: Email Mailed Paper Copy Address: 565 LAKOTA LANE
Engineer Via: Email Mailed Paper Copy City/State/Zip:CHASKA, MN,55318
0 Other* Via: 0 Email Mailed Paper Copy Email: HEATHER.LYNN SILVA@GMAILCOM
INSTRUCTIONS TO APPLICANT: Complete all necessary form fields,then select ,ti .to save a copy to your
device. and deliver to city along with required documents and payment. SUE. to send a digital
copy to the city for processing.SAVE FORA PRINT FORM sugar FORM
04/2o12020
City of Chanhassen
Community Development Department
Planning Division
7700 Market Boulevard
Chanhassen, MN 55317
Dear Mackenzie Walters (or to Whom it may concern),
We are writing to formally request a variance for our septic system at 565 Lakota Lane. We
have been informed that we could not install a septic at the lower end of our bluff and that the
only approved location (Approved by Eric Tessman (City of Chanhassen Engineer)) is in the
north western corner of our property. However, given the location, we will need a variance in
order to proceed. Along with this letter is the Completed variance application along with the
requested documentation per the checklist we found inline. Please advise if there is anymore
information you may need from us.
Thank you for your time.
Best Regardl
Francisco and Heather Silva
CI-'V 3F CHANHASSEN
RECEIVED
tviAY 01 2020
CHAiihiASSEN PLANIIING DEI
Bohn Well Drilling Co
952-445-4809 Fax: 952<45-1439/ www.bohnwell.com
18190 Dairy Lane, ste 101, Jordan, MN 55352
dr
lr,
Your One Stop Contractor
g.. Gornpq^
Dis It -1b
Drill It
Drain It
Percolation Tests, Soil Borings &
Septic System Design
c6844 41812020Joey Menden
Completion DateCreated By
Prepared F!r:Francisco and Heatier Silva
Attention Francisco and Heather Silva
Mail'ng Addrgs:565 Lakota Lane
Chaska, MN 55318
Phone #"s Work His Mobile:952-4A4-9366
Fax
Site Location Information
Homeowners;Francisco and Heather Silva
Site Address 565 Lakota Lane
Chaska, MN 55318
County Township
8n
Chanhassen
Tom$rip # 116I{ RangE *Section # 36
Design must be paid for, by whom it was prepared for, prior to releasing it to any contrdctor to bid or any city,
Town*rip or County office for permitting. We reserve the right to hold design until payment has been received.
CIIY OF CHANHASSEN
RECEIVED
MAY 01 2020
CHAJ'IHASSEN PLAI'INING DEPI
\
Personal License # lBusiness License #
1043
Her Mobile 612-418-5044
Carver
Bohn WeIl Drilling Co.
18190 Dairy Lane, Ste 101, Jordan, MN 55352
952-445-4809 ax:952-445-7439 .bohnwell.com
Design Info s Dig It
Drill It
Drain It
Your One Stop Contractor
Items Included in Design Packet
1. SepticSystem Design
A. Design cover Sheet
B. SepUc Design Drawing
C. Design Summary worksheets
D. Mound Design Worksheet
E. Pressure Distibution Worksheet
F. Pump Selection Worksheet
G. Pump Tank Sizing and Float Setting Worksheet
H. Altemate Septic Site DrawingI. Soil boring worksheets
2. Septic System Management Plan
3. Special info: The washed sand in the mound must etend to the toe of all the
dikes. This includes the toe of the upslope dike, endslope dike and downslope dike.
Not just to the absorption area.
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Certificate of Survey for:
Francisco and Heather Silva
Sr..t 2 of 2
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934.7
937.7
939.2
930.40
928.60
928.30
928.00
Septic Design Key for Survey
Details
floor elevation
Existing grade at rock bed
op of rock bed
Top of mound
4" pipe out of house
lnvert f1 Septic Tank
lnvert fl2 Septic Tank
lnvert f3 PumpTank
L750
1O0O gallons
10OO gallons
Gallons
925.00 lnvert of pump
Total feet of head19.40
Elevations
Design Summary Page
E MI N }IESOT POLLUIIONIII coNTroracENcY
1. PROJECT INFORMATION v U.07.2019
Francisco & Heather Silva Project lD:
Date:
Phone:
251300010
565 Lakota Ln Chanhassen, MN 55318 ut08t20
2. DESIGN FLOW & WASTE STRENGTH Attach dato I etti,tnte bosis for other Establistnpots
Design Ftow:
BOD:
Treatment Levet:
600 Residential
c
mg/L
Sele.t Treotrnent Leyel C tor rctideotiol teptic tdnk eftluefit
mg/L T55:
GPD Anticipated Waste Type:
mg/L Oi[ &. Grease:
3. HOLDING TANK SIZING
Minimum Capacity: Residentiat =400 gal/Hroom, Other Estabtishment = Design Row x 5.0, Minimum size 1000 gallons
Cde llinimum Holding Tank Capacity:
Recommended Holding Tank Capacity:
Type of High Level Alarm:
Comments:
Galtons in
Galtons in
Tank or Compartments
Tanks or Compartments
(set @ 75% tank capacity)
4. SEPTIC TANK SIZING
A. Residentialdwellings:
Number of Bedrooms (Residentiat):
Code llinimum Septic Tank Capacity:
Recommet ed Septic Tank Capacity:
2250
2250
No
4
7
GPD x
Tanks or Compartments
anks or Compartments
Efftuent Screen & Atarm (Y/N):
Days Hyd. Retention Time
Efftuent Screen & Atarm (Y/N):
Gallons in
Gattons in
lrtodet/Type
Gallons In
Gatlons ln
lrtodet/Type:
B. OtherEstabtishments:
waste received by:
Code llinimum Septic Tank Capacity:
Recommended Septic Tank Capacity:
Tank or CompartmenG
Tank or Compartments
5. PUMP TANX SIZING
1000 Gal
Gat
ft
gal
Gat
Gat
ft
Gal
1000
29.0 19.4
2.m 100.0
Pump 1 GPM Totat Head Pump 2 GPM Total Head
Suppty Pipe Dia.Suppty Pipe Dia.Dose Vot:
Pump Tank 1 Capacity (l inimum):
Pump Tank 1 Capacity (Recommended):
Pump Tank 2 Capacity (Minimum):
Pump Tank 2 Capacity (Recommended):
in Dose Vo[:
Property Owner/Ctient:
Site Address:
Email Address:
JN l^INXESOTA POLLUTIOXItl coNtPof acENcY
6. SYSTEM AND DISTRIBUTION ryPE Proiect lD: 2513m010
Soi[ Treatment Type:
Elevation Eenchmark:
MPCA Slatem Type:
Type lll/lV Detaits:
Mound Distribution Type:
Benchmark Location:
Distribution l edia:
Pressure Distribution-Level
934.5 Garage Ftoor
Type lll Rock
Fitted soit under mound area.
ft
7, SITE EVALUATION SUAA'{ARY:
Describe Limiting Condition:Redoximorphic Features/Saturated Soils
Layers with >35% Rock Fragments? (yes/no)No lf yes, describe below: % rock and layer thickness, amount of
soit credit and any additional information for addressing the rock fragments in this design.
N ote:
Depth Depth Elevation
Limiting Condition:
Minimum Req d Separation:
Code lrlax System Depth:
12 inches 1.0 ft ft
36 inches 3.0 ft Etevation Critical for system cornpliance
l'lound inches -7.0 ft 2.O ft
_------TttF-E-S3-ltl?fiEjqqll-d-eP!l-tg-th€ botto.n of tlle distributin medla. tlegative Deptn (ft) means it must be a mqrM.
Soil Texture:
Soil Hyd. Loading Rate:
Contour Loading Rate:
l easured Land Stope:
Comments:
Loam
0.60 GPD/ft2 Percotation Rate:I
12 Note:
Note:
8. SOIL TREATAAENT AREA DESIGN SUM"TARY
Trench:
Dispersat Area
Total Lineat Feet
Contour Loading Rate
Sidewatl Depth
No. of Trench6
Min. Length
Trench Width
Code ldax. Trench Depth
Designed Trench Depth
ft2
ft
ft
ln ft
in
inft
Bed:
Dispersat Area
Bed Width
ft2 Sidewalt Depth
Bed Length
ln Maximum Bed Depth
Designed Bed Depth
tn
ft ft tn
Mound:
Dispesal Area
Absorption Width
Upstope Berm Width
Totat System Length
500.0
20.o
10.8
78.5
ft2 Bed Length
ft Ctean Sand Lift
ft Downslope Berm
ft s)rstem Width
50.0
7.O
15.2
36.0
Bed Width
Berm Width (0-1%)
Endstope Berm Mdth
Contour Loading
10.0
14.3
ft
ft
ft
ft
ft
ft
ft
gat/ft12.0
Design Summary Page
Or:s,rr m MINXESO'A PO L LUTI ON
CO NTRO L AGENCY
Pro lD: #REF!
ft
gal/ft
ft
Bed Length
Upstope Berm
Sptem Length
ft
ft
ft
Finished Height
Downslope Berm
System Width
ft
ft
ft
At-Grade:
Bed Width
Endstope Berm
Contour Loading
Level & Equal Pressure Distribution
No. of Laterals
Lateral Diameter
Perforation Spacing
Min Dose Volume
ft Perforation Diamet ln
1.50 ln 63 gat Max Dose Votume 150 gat
3 3 7132.
Non-Level and ual Pressure Distribution
Lateral 1
Lateral 2
Laterat 3
Lateral 4
Lateral 5
Lateral 6
l inimum Dose
Votume
gat
aximum Dose
Votume
gat
Elevation
(ft)
Pipe Size
(in)
Pipe
Votume
(gat/ft)
Pipe
Length (ft)
Perf Size
(in )
Spacing
(ft)
Spacing
(in)
IIIIIIIIIIIIIIIIIIIIIIIrIIIIIII IIII
9. Additional lnfo for At-Risk, HSWor Type lV Design
A. Starting BOD Concentration = Design Ftow X Starting BOD (mg/L) X 8.35 + 1,000,0m
B. Target BOD Concentration = Design Flow X Target BOD (mg/L) X 8.35 + 1,000,000
tbs./day/ft2ft2gpd x 8.35 + 1,(n0,000 +
lbs. BOD/day
C. Organic Loading to Soil Treatment Area:
tbs. BOD/day
mg/L X
' lust Meet or Exceed Target
'Required for Levets A & B
gpd x
PreTreatment Technology:
Disinfection Technotogy:
cpd x
mg/L X 8.35 + 1,000,00 =
mg/lX 8.35 * 1,000,00 =
Lbs. 8OD To Be Removed:
10. Comments6pecial Design Considerations:
Lift pump witt be instatted in basement to keep tank shaltower in yard.
Joey l'{end€n c6844 9 -8-Ju)\Lru-
I hereby certify that I have compteted this work in accordance with att appticabte ordinances, rutes and [aws.
(License #)(Date)(Designer)(Signature)
-
Design Summary Page
O.rs!r.
Design Summary Page -
TTINXESOTAPOLI.UIIONIlf coNTRoLAGExcY
Pro lD: #REF!
Level & Equal Pressure Distribution
No. of Laterats
Laterat Diameter
Perforation Spacing
Min Dose Volume
ft Perforation Di ln
1.50 ln 63 gat Max Dose Volume 150 gat
3 3 7 t32
Non-Level and Pressure Distribution
tateral 1
laterat 2
Laterat 3
Lateral 4
Lateral 5
Lateral 6
Minimum Dose
Votume
gat
llaximtsn Dose
Volume
gat
Spacing
(in)
Elevation
(ft)
Pipe Size
(in)
Pipe
Volurne
(gaUft)
Pipe
Length (ft)
Perf Size
(in)
Spacing
(ft)
IIIII IIIIIIIIIIIIIIIIIIIIIIIITIITI
I
9. Additional lnfo for At-Risk, HSW or Type lV Deslgn
A. Starting BOD Concentration = Design Flow X Starting BOD (mg/L) X 8.35 + 1,000,000
B. Target BOD Concentration = Design Flow X Target BOD (mg/L) x 8.35 + 1,000,000
tbs. /day/ft2ft2gpd x 8.35 i 1,000,000 +
tbs. BOD/day
tbs. BOD/day
mq/L X
'Must Meet or Exceed Target
'Required for Levels A & B
PreTreatment Technology:
Disinf ection Technology:
cpd x mg/L X 8.35 + 1,000,0O =
cpd x mg/L X 8.35 + '1,000,0O =
uc. BOD To Be Removed:
10. Comments/Special Design Consideratlons:
Joey Menden c6444
I hereby certify that I have completed this work in accordance with atl appticable ordinances, rules and taws.
(Signature)(License #)(Date)(Designer)
Bed Bed Finished
Contour Loading Upstope Downslope Berm
Endslope Berm System System
C. Organic Loading to Soi[ Treatment Area:
Lift pump witt be instatted in basement to keep tank shallower in yard.
-l
rrt x { Esota PollurtoNIll coNrroL GENcY
1. SYSTET,T STZ|NG:Proiect lD: 251300010 v 04.02.2019
A. Design Row:
B. Soit Loading Rate:
C, Depth to Limiting Condition
D. Percent Land Slope:
E. Design l edia Loading Rate:
F. ,rlound Absorption Ratio:
600 GPD TABLE lXa
G PD ft2 LOAOII{G RATES FOR OETERTTNITIG EOTTOA.I ABSORPTION AREA
AND ABSORPTION RATIOS USING PERCOLATIOX 1EST5
'1.0 ft
%{xrr)
1.2 GPD/ft2
;0rro5
16lo 30
i6 ro@
'S)rstems with these yalues are not Type I r!6tems.
Contour Loading Rate (tinear loading rate) is a
recommended value.
T...!m.d t El A, a-2, B,
(!,drn'l
ilt
{rnarfl
1
1
1 1.6
1.6I
2 0.780.6
0_6
oa5
6r lo120
>120
2.00
TTOUNO CONTOUR LOADIXG RATEs:
OR
TexturE - dsrired
mo(,|d abJorptixr
r.0, 1.3. 2.0. 2.4,2.6
5.OOR
>5.0'
@@@@
HEEEE
2. DISPERSAL IIEDIA SIZING
A. Catcutate Dispersal. Bed Area: Design Row r Design itedia Loading Rate = ftr
6N GPD +1.2 GPD/ft2 =500 ft2
lf a targer disp€rsat media area is desired, enter size:ft2
B. Enter Dispersat Bed Width:10.0 ft Can Nt exceed 10 feet
C. Catcutate Contour Loading Rate: Bed Width X Design lvtedia Loading Rate
10 ft2 x GPD/ft2 =12.0 gat/ft Can not exceed Toble 1
D. Calcutate Minimum Dispersal Bed Length: Disp€rsat Bed Area i Bed Width = Bed Length
500 ft2 +10.0 ft=50.0 ft
3. ABSORPTION AREA SIZING
A, Calcutate Absorption Width: Bed Width X lrtound Absorption Ratio = Absorption width
10.0 ftx 7.O 20.0 fr
B. For slopes >1%, the Absorption width is measured downhitl from the upstope edge of the Bed.
Catculate Downslope Absorption Width: Absorptlon Width - Bed Width
20.0 ft 10.0 ft=10.0 ft
4. DISTRIBUTION MEDIA: ROCK Proiect ID:#REF!
A. Rock Depth Betow Distribution Pipe
9 0.75
Mound Design Worksheet
>1% Stope
2.0
1
1 '1.6
2t I o.zs
26 I o"
slos
2
1.5 -;_l
H
f-T6o I
*_l*--l
o.re ]
5. DISTRIBUTION l,lEDlA: REGIsTERED TREATI{ENT PRODUCTS: CHAMBERS AND EZFLOW
A. Enter Dispersat Ll€dia:
B
c
Enter the Component: Length:ft widrh:ft Depth fr
Number of Components per Row = Bed Length divided by Component Length (Round up)
ft;ft=comPonents / row
components X ft=
E. Number of Rows = Bed Mdth divided by Component Width (Round up)
ft+ft=rows Adjust width so this is o whole number.
F. Totat Number of Components = Number of Components per Row X Number of Rows
x components
6. l,lOUND SlZlNG
A. Catcutate Minimum Clean Sand Lift: 3 feet minus Depth to Limiting Condition = Clean Sand Lift
3.0 ft 1.0 2.0 ft Design Sand Lift (optionat):ft
B. Upstope Height: Ctean Sand Lift + Depth of Media + Depth of Cover cover (l ft.)
2.O ft+1.1 ft+1.5 ft=4.6 ft
Land Slope %0 1 2 3 4 5 6 7 8 9 10 11 L2
Upslope Berm
Ratio
3:1 3.OO 2.83 2.75 2.68 2.67 2.54 2.44 2.42 2.36 2.31 2.26 z.2r
4:7 4.OO 3.85 3.70 3.57 3.45 3.33 3.23 3.12 3.O3 2.94 2.46 2.74 2-70
C. Setect Upslope Berm lrtuttiptier (based on tand stope):2.38
D. Catcutate Upstope Berm Mdth: Multiptier X Upstope Mound Height = Upstope B€rm Width
2.38 ftx 4.6 ft=ft
E. Catcutate Drop in Etevation Under Bed: Bed Width X tand 5tope r 100 = Drop (ft)
10.0 ftx 7.0 X t 100=
F. Calculate Downslope ]rlound Height: Upstope Height + Drop in Etevation = Downstope Height
ft+ft=ft4.6 0.20 4.8
Land Slope %0 7 2 3 4 5 6 7 9 10 11 12
Downslope
Berm Ratio
3.OO 3.09 3.19 3.30 3.47 3.53 3.66 3.80 3.95 4.11 4.29 4.48 4-69
4:7 4.O0 4.77 4.35 4.54 4.76 5.OO 5.56 5.88 6.25 6.67 7.69
G. Select Downstope Berm ,r{uttiplier (based on tand stop€):
3.19 x 4.8 ft=15.2 fr
l. Catcutate Minimum Berm to Cover Absorption Area: Downslope 45r561p1ion Width + 4 feet
10.0 ft+ft=
ft
14.0 ft
J. Design Downslope Berm = greater of 4H and 4l:
K. Setect Endstope Berm Multiptier:
15.2
3.00 (usuolly 3.0 or 4.0)
L- Catcutate Endslope Berm X Downstope [{ound Height = Endstope Berm Wdth
1.00 ft ft=14.3 ft
,{. Catcutate lilound Width: Upstope Berm Width + B€d Width + Domstope Berm Mdth
10,8 ft+10.0 ft+15.?ft=36.0 ft
ft
N. Catculate ,\ ound Length: EnGtope Berm Mdth + Bed l€ngth + Endstope Eerm Mdth
14.3 s0.0 14.3 78.5
0.20
4
ft+ft+ft=
Check registered prduct
intormoti on f ot qeci f ic
owlicotion details and
design
D. Actuat Bed Length = Number of Components/row X Component Length:
ft=
H. Calculate Downstope Berm Mdth: ,r{uttiplier X Downslope Height = Downstope Berm Mdth
2.9L
10.8
3:1
5.26 7 _14
3.19
7. MOUND DIMENSIONS Project lD:#REF!
=s
c.
!
='g
=o
=(E
P
4" inspection pipe
18' cover on top 15.2
berm 4.D berm 4.J
10.8
12' cover on sides
(6" topsoit)
Depth to Linriting t1 .C)
1.0Limiting C ondition
ion Mdth (3.A
Note:
For 0 to 1[ stopes, Absorption |$dth is rom the ,edequatty in both directions.
For slopes >1%, Absorption Wdth is measured downhitl from the upstope edge of the Bed.
Comments:
Upstope (4.D)
4.1)
't0.8
4.L
15[2
Downslope (4.J)
't0.0 50.0 11-l
Dispersal Bed: (2.8 x 2.C)EC
,O
c(o()
u
78.5Total Mound Len th 4.N
r
2.0Ctean sand tift (4.A)
I
20.0
I I
I
x
I
Otrstr€Pressure Distribution
Design Worksheet
IN MT X X ESOI POLLUIIONlIf coNTRoL AGExcY
Proiect lD: 251300010 v 04.02.2019
1 . Media Bed Width:10 ft
2.
^linimum
Number of Laterats in system/zone = Rounded up number of [(Media Bed Width - 4) + 3] + 1.
taterals Does r'p.t ody to dt-grdes
laterals
10 -4);31 +1=t(
3. Designer Setected Number of Loterols:
Cannot be less than line 2 (ExceDt in ot-erades)
4. Select Perforotion Spocing i
5. Selert Perforation Diometer Size:
6. Length of Laterals = Media Bed Length - 2 Feet.
50.0 ft Perforation can not be closer then 1 foot frorn edge.
7 /37
fr
in
2lt 48.0
3.0 16ftft Spaces
8. Number of Perforotlons per Loferol is equa[ to 1.0 ptus the Numb€r of Perforation
'pdlces.
Check tabte
betow to veriry the number of perforations p€r lateral guarantees less than a 10* discharge variation. The
vatue is double with a center manifo{d.
Number of Perforation Spaces =
Perlorotions Per Lnterol =Spaces + 1 =Perfs. Per Laterat
9. Totol Number of Pertorotions equats the Number of Perforotions per Laterol multiptied by the Number of
Perforoted Loterols.
16
17
Seled. Type of lAanifold Connection (End or Center):
klect Lateral Diameter (See Table) i
17
Perf. Per Lat, X Number of Perf. Lat. =
Spacing of laterats; ,trtust be greater than 1 foot and no more than 3 feet:
51 Totat Numb€r of Perf.
3.0 ft'10.
10.
11.
End
1.50 in
3
3
lladlln lhder d Peria"*iru Per L*ml b ferrilre <!0l Bdrarge Vuirtim
r/. lnch Prfc-etins 742 hch Perfontiors
P€r{orrti}n Spad4 (F€€t}Pipe Ohneter tlmhes)Per{c".thn $,xirT
{Fee{
Pipe Di.r?ter {erdre:)
I Itt l I tL th ?l
1 t0 t!'It l0 60 I lr t6 7t 31 6t
Iri E r2 5.1 2ti r0 l.l l2 6,r
3 E l2 l6 25 t2 3 9 t{t9 30
!1'16lrrh Prfrrlixr,l/E lrrh Perfontixr
Perfor-atim Soxiq {Fe€t}
Pir 0iame{r (kxfc;)tudorrtkxr lord'E
{ree0
Pip€ tI.nEt€r (ltxh.6)
I tv.lli l I lu 'tl1 2 l
2 l2 IE 16 46 E7 2 2l 3l 71 t49
211 24 .{)2;t 30 {t 69 t35
l t?t6 ?2 37 75 3 20 29 l8 61 lzE
3
7. Determine the Number of Perforotion Spaces. Divide the Length of Loterols W the Pertoration Spacing
and round down to the nearest whole number,
3.00
48.0
tl{
t6 l0
60
1
44
l7 l7 80 20
Or.s'r.Pressure Distribution
Design Worksheet
rn Mtx NEsoTl PoLt-ut lo xlll coNTRoLlGExcY
Uquid
Per Foot
(Gallom)
o.045
o.07a
o.t'to
o.170
o.3 ao
.661
12. Catcutate the Sqwre Feet per Pertorotion. Recommended volue is 4-11 ftz per perforotion.
Does not awly to At4rodes
6. kd Area = Bed Width (ft) X Bed Length {ft)
10 ft X 50 ft 500 ft2
b, Squore Fot per Perforation = M Areo dMded by the Total Number of Perforotions .
500 ft2 51 perforations =9.8 ft2 /perforations
13. Select llinimum Averoge Heod:1.0 ft
14.
15.
Seleft Perforotion Discharge (GPt{} based on Tabte:0.56 GPi per Perforation
Determine required FIow Rote by muttiptying the lotal Number of Perfs. by the Perforation Dtscharge.
51 Perfs X GPM per Perforation =29 GPM
Gatlons/ft16. Volume of Liquid Per Foot of Distrik)tion Piping (Table lt) :0.110
17. Volume of Distribution Piping =
= lMumber of Pe4oroted Loterals X Length of Loterols X (Vottrme of
Liquid Per Foot of Distribution PipirEl
X 48 ftx 0.110 gal/ft 15.8 Gallons
18. Minimum Detivered Votume = Volume of Distribution Piping X 4
15.8 gats X 4 =63.4 Gattons .5
2
3
I
pfe fron prr,rp
outt
oI from
I
altarnae lo(.tin
Comments/Special Design Considerations:
Volume of Liquid in
Diameter
(inches)
1.25
0.56
K Basic Pump Setection Design Worksheet rE Mlxr{l30l-r}olfurroxlIt coxtroL^c.xcY
1. PUIAP CAPACTTY P(oject lD: 25130010 v 0.1.0?.2019
Pae:5ure
1. lf pinping to gravity eote. the gatloi pe, mi.ute of th€ pmp:
2. lf prrnping to a pres$Jrized dbtrihJtion system:
3. Enter pump d€idptim:Demand oosing
29.0
GPA,I (10 - aS grn)
Pumping to Gravity or Pr6sure Distribution:
2. HEAD REQUIREATENTS
Table l.Frlctlon Loss in Plastic 100ft
Diameter linchesPiFlow Rate
Pr,l)1 1.25 1.5 2
10
12
t4
16
t8
20
25
30
35
4
45
50
55
60
65
70
75
E5
95
3.1
4.3
5.7
7,3
9,1
t 1.1
16.8
23.5
1.3
,.8
2.4
3.O
3,8
4.6
6.9
9.7
,2.9
16.5
20.5
0.3
o.4
0.6
o^7
0.9
't. t
1.7
2.4
3.2
4.1
5.0
6,1
7.3
8.6
10.0
11.4
13.0
16.4
zo.1
A- Elevation Difference ft
betvreen pump and point of discharge:
B. Distrlbution tlead Loss:
C. Mditionat Head Loss:0.0
ft
ft {aE to !r€d.t .qiFn ti, cr..)
Di strib.rilon Head l-o5s
Gravity Distribution = Oft
Pressure Oistribution based on Minimum Average Head
Value on Pressure Dlstrlbutlon \^/orksheet:
Minirnum Averaqe Head Distribrttio.r Head Loss
1ft 5ftzft6ft
5ft 1oft
D. 1. Sr.ppty Pipe Dia,tEter:
2. tupply Pipe Ler€th:60 ft
E. Fridion Loss ln Plartk Pip€ per '10oft from Table l:
Friction Lost =ft per t00ft of pipe
point. EstlE|ate by addtq 25X to supply pipe t€rBth to. fittirB lo6s. *tfly Pi,E Leryth
(D.2) X 1.8 - Eqrivoaent HF LeBth
60 ft x 1.25 75.0 ft
G. Catcdate 54ply Frr.tr'd, Lots by multtslrog Frictiot Loss kr ,@lt (Llne E) by the Egsrwfera Pir€ Length (LirE F) ard drn:de by tOO.
s{ppty Frlctioo Loss =
7.23 ft per l@ft x 75.0 ft rtm 1_7 ft
5
H. Totol Heod requirernent is the sur ot tE Aerotion Oiflerefte (Line A), the Distribrtbfl nead Lo65 (Li E B), ldditiorEt Head L6s (LiDe C), and
the Sippty F.iction Loss (Line 6 )
5.0 0.0 1.7 19.4ft+ft ftft
3. PUI4P SEt_ECflOr{
A pump
'Ill,3t
be setected to detiver at teart 29 .O Gf,r,t (LiE I or LiiE 2) with at terst 19 .4 feet oa total head.
9.1
12.4
17.O
21,A
12.7
2.0
12.7
Comrnents:
ffi m L|ltrtora rot lrrTtox
DETER'AII{E TANK CAPACTTY AND OI'TENSIONS Proie<t lD: 25r3000lo v&.m.2019
A- Dgljgn Flod (Bgn s,rn.ta).
B. ,{in. .eqrired Frr? ia* r.9.cit),:
C. Tan& Use:Doring
D. R€<orErEflded pump tar* cagactty:10,0O 6atr000
2. A- Tank l,lanutacturer:B- Tank r'lodel:
GallorE
GatlqB per inah
lidE
C- Cipacity frdn iianufactuaer:
O. GaI66 F iich frcrn manufacurer:
E. Liqrid depth of tad( trdn ,t!ar rrlwlr:
1085
77.8
t6-0
DETERIUNE DOSIXG VOLUIIE
3 Catcrlate VoAaa !o Coreart l'1 olE i{et o, the Frrrp rn6t he at te.i rt.Lrah6 frsn th€ botloln d dE Frrp t * 6 2 irdl6 oa kt€r co.lriB dle Brrp
b recdtrtlllded)
(Arrp ard ttod( hetht + 2 lrdE ) XGdaonrF r rrrdr CIC a 3E)
(1zl in + 2 inches) X 45 Galton!
Llit imr/,, o€tlrcr.d yolsne . ,{ X VoturrE of oistrihtion PipirB:
-lten 18 ol tt,€ Prcl!,)r2 Drttalhrtlon or ttem 1t ol tb,,-leyel
5 CalclJ,.ate *lExir m, hrrpo{tt yoftrna (25: of oesign Ftor)
(l,tifiirnurn dose)inches/dose
Desigo Ro ;600 GPD x 0.25 150 Gallons (llaximum doie)inche5/dose
27.8
6 *leca o pnwn,.ohrtlp afu ,,.c8 ,pth ,,i,,fJl,a,,n drd ,btdm:
7 C,,.olalr tu kr by . Hgn Ftow I D"{rE €d yol@l.
100 6atlons
ffi gpd +1m gat =6.00 DoJes
E Calqrlate tr.hbdc
L ofr/,.wqst,p,.yw-
8. trqrh o{ 9Aty PiPe .
C. Volu,E ol Lrq,//d kr Lttlllll tut ol npe =
60
hdl6
feet
D. Drotutuk = L.ngth ol Supqly Plpe X yoL re of Llqnd Pe. Lln€{Il F@t ol firy
60 ftx gat/ft =
9. Totot bsing volurrc - Dellftred yohfip ptus Droinboct
1m gat +r0.2 gat =110 Galtons
't0- ,linirrro Alarm VolunE = Depth ot atarm (2 or 3 i.dEs) X gaUorls per inch od tanl
inx 27-8 ga(/in =81.,{Gallons
2
Pipe
Diametcr
(i nches)
Per Foot
(C'alkcns)
1
1 .25 o.o78
o.1 10
2 o.170
3 0.380
4 o.661
o.170
r0.2
l
OE'IAND DOSE FLOAT SETTINGS
11. Catcr{ata fl@t s€porotb, oritorae uJirts HrB lbll,rre
Toad oortt'8 Yartt rf, lcdlo.6 fur krh
ll0 gal i 71.8 gauin =4.O lnches
12. lil€anrirts trorn bottoan of trnk:
A. Usaonce ao *a hrrry Or, flooa . Pudp a Ho(k height a 2 i.ch€r
lnch6fd DGe: ,1.0 in
14 in + 2in =16 lnches 2!.o in
20.O inB. Distonce to *t PufV On n@t-Disto,]te to *t ArWOll Fl@t . float 9?orctlon Dishace
16 tn+4.O 20 lnches
C- Ditt,,lf,e to set Alofin R@t - Asao7,Ee to *a hrnpon fldr + Iorr, [tpai (2-3 inches)
20 1.0 2l
t3.4 Cnl
r10 Gal
in+lnth6
Aarm Depth
ftrrp Or
Purp Off 15.O in
Pump Tank Design Worksheet (Demand Dose)
1.
wLP 1000
tloa.: ksign colcdotion are bo*d on this sptcilic tonk.
stfrstitutiDg a diflerent tank ndel will chonge tl'€ p,rmp
,lo6t or ainer s.ttingt. Co,rtaca desill'l.r it (jnn',ges are
Per lnch
5.4
Volume of Liquid in
Pipe
o.045
1.5
0.170
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UNrveRsrrv
or MrNxrsore
Septic System Management PIan
for Above Grade Systems
The goal of a septic system is to protect human health and the environment by properly trearing
wastewater before retuming it to the environment. Your septic system is designed to kill harmful
organisms and rcmove pollutants before the water is recycled back inlo our lakes, streams and
groundwater.
This management plan will identiry the operation and maintenance activilies necessary to ensure long-
lerm performance of your septic system. Some of these activities must be performed by you, the
homeowner. Other tasks must be performed by a licensed septic maintainer or service pmvider-
However, it is YOUR rcsponsibility to make sure all tasks get accomplished in a timely manner.
The University of Minnesota's Seplic System Owner's Guide contains additional tip6 and
recommendations designed to extend the effecrive life ofyour syslem and save you money over time.
Pruper septic system design, inslallotion, operotion and mairrlenance means safe and cleon wole
Property owner Francisco & Heather Silva
Property Address 565 Lakota Ln Chanhassen, MN Property ID 251300010
System Designer Gary Bohn License # 949
System lnstaller Bohn Well Drilling Co.License # 1(X3
Service Provider/Maintainer Boho Well Drilling Co.Phone 952{45'4809
Permitting Authority City Of Chanhassen Phone 952-227-'1300
Permit #Date Inspected
Keep this Management PIan with your Seplic Syslem Owner's Guide. The Seplic Syslem Ou'ner's Guide
includes a folder designed to hold maintenance records including pumping, inspection and evaluation
rcports. Ask your septic professional to also:
. Attach permit information, designer drawings and as-builts ofyour system, ifthey are available.
. Kecp copies ofall pumping records and other maintenance and rcpair invoices with this document
. Review this document with your maintenance professional at each visit; discuss any changes in product
use, activities or water-use appliances.
For a copy ofthe Seplic System Owner's Guide, qll l-80G87G8636 or go to http://shoP.extension.umn.edu/
10/09
http ://septic.umn. edu
I
UNrveRstrv
on MrNxnsorn
Septic System Monogement Plan
for Above Grade Systems
Your Septic System
Soil Treatment Areg
Mound/Ar-Grade area (length x width): 78'5 ft x 36'5 ff
Rock bed size (lenglh x width): 50 ft x r0 ft
g Cleanouts or Inspection Porls
g Surface Water Diversions
Septic System Specifics
system Type: @ t OtI O III OIvr O vi
(Based on MN Rules Chapter 7080.2200 - 2400)
o System is subject to op€rating permit'
o System uses UV disinfection unit+
Typc of advanced reament unit _
I Addilional Management Plan required
Dwelling Type Well Construction
Number of bedrooms: 4
System capacity/ design flow (gpd):6@
Anricipated average daily flow (gpd):600
Comments
ln-home business? _ What type?
well depth (ft): > lo0
B Cased well Casing depth:> 100'
o Other (specify):
Distance from septic (ft),'75'
Is the well on the design drawi N
Septic Tank
a
9 Pump Tank (y'one) lffi gallons
Pumpcapacity 29 GPM
Alarm / visual / audibleo
. GouldsE EfTluent Pump rYpe
TDH 19.a Feer ofhead
One tank Tank volume: _gallons
Does tank have two compartments?OY ON
Two lanks Tank volume' 25o gallons
Tank is constructed Of concreteo
Emuenl Scr€en ,)ps:
'10/09
a
L]
t
rl
-
4r_,
:'.:...
UtttvBRstry
or MrNNnsore
Eslem Designer
Locol Governmenl:
State Requiremenl:
Septic Syslem Monagement Plan
for Above Grade Systems
Homeowner Management Tasks
These oryralion and maintenance aclivittes are )nur responsibility. Use the chart on page 6 to lrack
your aclivilies-
ldentiry the servicc intervals recommended by your system designer and your local govemment.
The tank assessment for your syslem will be the shortest interval of these thrce intervals. Your
pumper/maintainer will determine ifyour tank needs to be pumped.
check every S months
check every S months
check every 36 months
My tank needs to be checked
every 36 months
Seesonally or sever.l tim€s per yelr
a l*aks. Check (listen, look) for leaks in toilets and dripping faucets. Repair leaks promptly.
o Swfacing sewage. Regularly check for wet or spong/ soil amund your soil treatment area. If
surfaced sewage or strong odors are not corrected by pumping the tank or fixing bmken caps, call
your service professional. Untreated sewage may make humans and animals sick-
o Alarms. Alarms signal when therc is a problem; contact your maintainer any time the alarm
signals.
o Lint fher. If you have a lint filter, ctreck for lint buildup and clean when necessary. Consider
adding one after washing machine.
a EflIuent screen. lf you do not have one, consider having one added the next time the tank is
cleaned.
Annuelly
o Vater usage rale. A water meter can be used to monitor your average daily water use. Compare
your water usage rate to the design flow of your system (listed on lhe next page). Contact your
septic professional if your average daily flow over the course of a month exceeds 70olo of the
design flow for your system.
o Caps.Make sure that all caps and lids are intact and in place. Inspect for damaged caps at least
every fall. Fix or rcplace damaged caps before winter to help prcvent freezing issues.
o lYater conditioning devices- See Page 5 for a list of devices. When possible, pmgram the recharge
frequency bced ot water demand (gallont) ralhet lh^n time (days). Recharging too frequently
may negatively impact your septic system.
a Reeiew your water usoge rare. Review the Water Use Appliance chart on Page 5. Discuss any
major changes with your pumper/maintainer.
During each visit by a pumper/maintriner
o Ask if your pumper/maintainer is licensed in Minnesota-
o Make sure that your pumper/maintainer services the tank through the manhole. (NOT though a 4"
or 6" diameter inspection pon.)
o Ask your pumper/maintainer to accomplish the tasks listed on the Pmfessional Tasks on Page 4.
-3-
-
10109
UuIvERsIry
on'MrNxesorn
Septic System Management Plan
for Above Grade Systems
Professional Management Tasks
These are lhe operalion ond mainlenance aclivities lhal a pumper/maintainer performs lo help enswe
longlerm performance of yow system- Professionals should refer to the O/M Manual for detailed
checHists for lanks, pumps, alarms and olher components. Call 800-322-8642 for more details-
o Written rccord provided to homeowner after each visit.
PlumbinglSource of Westewater
o Review the Water Use Appliance Chart on Page 5 with homeowner. Discuss any changes in
water use and lhe impact those changes may have on the septic system.
o Review water usage rates (if available) with homeowner.
Septic
o
Tank/Pump Tanks
Manhole lid. A riser is recommended if the lid is not accessible from the ground surface. Insulate
lhe riser cover for frost protection.
Liquid level. Check to make sure the tank is not leaking. The liquid level should be level with the
bottom of the oudet pipe. (lfthe water level is below the bonom of the outlet pipe, the tank may
not b€ watertight lf the water level is higher than the bottom of the outlet pipe ofthe tanlq the
effluent screen may need cleaning, or there may be ponding in the drainfield.)
Inspection pipes. Replace damaged caps.
Bfiles. Ch*k to make sure they are in place and attached, and that inlet/oudet baffles are clear
of buildup or obstructions.
Efrluent screen. Check to make sure it is in place; cleon per manufacturer recommendation.
Recommend rctrofifted installation ifone is not present.
Alarm. Yeify thx the alarm works.
Scum and sludge. Measure scum and sludge in each compartment of each septic and pump lank,
pump ifneeded.
o
o
o
o
o
o
Pump
o
o
o
o
o
Pump and controls. Check to make sure the pump and controls are operating correctly.
Pump vaull. Check to make sure it is in place; clean per manufacturer rccommendations.
Alarm. Yerify that the alarm work.
Drainback. Check to make sure it is operating properly-
Event counter or run ,rme. Check to see if there is an event counter or run time log for the pump.
If there is one, calculate the water usage rate and compare to the anticipated average daily flow
listed on Page 2.
Soil Treatment Area
o Inspection pirys. Check to make sure they are properly capped. Replace caps that arc damaged.
a Surfacing ofeflluent. Check for surfaced emuent or other signs ofproblems-
o Lateralfushing- Check lateral distribution; ifcleanouts exist, flush and clean as needed-
o Ponding. Check for ponding. Excessive ponding in at-grade and mound beds indicates
problems.
All other components - inspect ss listed here:
-4-
10/09
Ur{rvsnsrrv
or MrlrNssorA
Septic System Management Plan
for Above Grade Systems
Appliance Impacts on Syslem Managemellt Tips
Garbage disposal
. Uses additional water.
. Adds solids to the lank-
. Finely-ground solids may not settle.
Unsettled solids can exit the tank
and enter the soil treatmenl area.
. Use ofa garbage disposal is not recommended.
. Minimize garbage disposal use- Composl iostead.
. To prevent solids fmm exiting thc tank, have your
tank pump€d more frequently.
. Add an eftluent screln to your ta[k.
Washing machine
. Washing several loads on one day
uses a lot ofwater and may overload
your system.
. Overloading your system may
prEvent solids from seltling out in
the tank- Unsettled solids ca$ exit
the tank aod eoter the soil tealmelt
arca.
. Choose a liontloader or water-saving top-loader,
thcse units use less water than older models.
. Limit the addition ofextra solids to your tank by
using a liquid or easily biodegradable detergents.
. Insall a ling filter afler the washer and an emuent
scre€n on your tank.
. Wash only full loads.
. Limit use ofbleach-based detergents-
. Think even - spread your laundry loads
lhroughout the week.
2d floor laundry
. Thc rapid speed ofwater entering
the tank may reduce performance-
. Install an emuent scr€en in the scptic tatrk !o
prevart the reless€ ofexccssive solids to the soil
treatmgnt arca.
. Be sure that you hav€ adcquatr tank capeity.
Dishwasher
. Powde*d and./or high-phosphorus
d€teBents c8n negatively impact the
performance ofyour tank and soil
treatment arca.
. New models promote "no scraping".
They have a garbage disposal inside.
. Use gel dele8ents. Powdered d€t€rgents may add
solids to the tank.
. Use detergents that are low or no-phosphorus.
. Wash only full loads-
. Scrape your dishes anyways to keep undig€sted
solids out ofyour septic system-
Grinder pump (in
home)
. Fincly-ground solids may not settle.
Unsettled solids can exit the tark
and eder the soil treatmenl arra.
. Expand septic tsnk capacity by a factor of 1.5.
. Include pump monitoring in your maintenanc€
schedule to ensure that it is working pmperly.
. Add an effluenl sqeen-
Large bathtub
(whirlpool)
. Large volume ofwater may
overload your system-
. Heavy use ofbath oils and soaps can
impact biological activity in your
tank and soil trealment area.
. Avoid using other water-use appliances at lhe
same time. For example, don't wash clothes and
take a bath at the same lime.
. Use oils, soaps, and clcaners in the bath or shower
sparingly.
Clean Water Uses Impacts on System Management Tips
High-cfficiency
fumace
. Drip may resslt in fiozen pipes
during cold weather-
. Re-route water into a sump pump or directly out
ofthe tpuse. Do not route furnac€ recharge to
your septic system.
Water softener
Irco filter
Reverse osmosis
. Salt in recharge water may affect
syst€m performance.
. Rechargc water may hydraulically
ovedoad the system.
. These sources produc€ water that is not sewage
and should not go into your septic system.
. Reroute water tom thcse sourc€s to another
outlet, such as a dry well, draintile or old
drainfield.
. When replacing consider using a demand-based
recharge vs. a time-based recharge-
. Check valves to ensurE proper op€ration; have
unit serviced per manufacturer dircctions
Surface drainage
Footing drains
. Water from theso sources will likely
ovedoad the system-
-5-
1O,!9
Water-Use Appliances and
Equipment in the Home
ry
UllrvrRslry
or MrNNssore
Notes:
Septic System Managemenl Plan
for Above Grade Systems
Maintenance Log
Ttack maintenance aclivities here for easy reference. See lisl ofmanagemenl tasks on pages 3 and 4
Activity Date accomplishcd
Leaks: check for plumbing leaks
Soil treatment area check for surfacing
Linl filter: check, clean if needed
EJIIuent screen: if owner-maintained
Chec* onnually:
Water usage rate (monitor frequency_)
Caps: inspecl replace ifneeded
Water use appliances - review use
Other:
II II
Mitigation/conective action plan:
'As tie or're.r of t,ljs ,S.S?S, I urde.stand it is ay .resporsjbtTity to prop,erl.y opetate enct ',aintaintrre seeagre tlertl|ent syste,tr on thTs ptoperty, utilizing the t anagenent plan- If tequiretuents intlris lranaqeEent Pfan are not aet, L -). pto@tly ^otify the petnlttinq auahoricy and takenecessaty corrective actions- I
,rea for fDture use as a soi-l t
fI systeltr, I aqtee to adequately protect trre reseflre
Date
n lling Co.g",1;1""g1on g 1043
i
Owner S
M Plan
Permitti Authori City of Chanhassen
-6-
10rc9
Check frequently:--t---l
92009 R€efis of dre Univcsir, ofMinrEsola All righs rcscwcd. The Univcrsity of Minrcoo is on equal opponunity educaror ard dDploycr-
This nuictial is availablc in altcnEtivc fonDts ulon ..qEst Cootrct th. wder R.sourc.s ccntd,6l2-62+928i. Th. bnsite s6Eg.
Ttlcntcrl PrDgr.rD is &,tvced by the Univ.rsig ofMiffEsota Exreocioo Scrvicc and rh. Univcrsity ofMinncso{. Werr. Rcsowc.r-Crd...
Memorandum
To: MacKenzie Young-Walters, Associate Planner
From: Erik Henricksen, Project Engineer
CC: Charles Howley, Public Works Director/City Engineer
Eric Tessman, Building Official
Date: 5/13/2020
Re: Setback Variance at 565 Lakota Lane – Planning Case #2020-07
The Engineering Department has reviewed the Variance submittal for 565 Lakota Lane. These
comments are divided into two categories: general comments and proposed conditions.
General comments are informational points to guide the applicant in the proper planning of
public works infrastructure for this project, to inform the applicant of possible extraordinary
issues and/or to provide the basis for findings. Proposed conditions are requirements that
Engineering recommends be formally imposed on the developer in the final order. Note that
references to the “City Standards” herein refer to the City of Chanhassen Standard
Specifications and Detail Plates.
General Comments/Findings
1. Any and all utility and transportation plans submitted with this application have been
reviewed only for the purpose of determining the feasibility of providing utility,
transportation facilities, and right-of-way management for the project in accordance
with City Standards. A recommendation of variance approval does not constitute final
approval of details, including but not limited to alignments, materials and points of
access, connection or discharge, that are depicted or suggested in the application. The
applicant is required to submit detailed construction drawings and/or plat drawings for
the project, as applicable. The City of Chanhassen Engineering and Public Works
Department will review plans, in detail, when they are submitted and approve, reject or
require modifications to the plans or drawings based upon conformance with City
Standards, the Chanhassen Code of Ordinances and the professional engineering
judgment of the City Engineer.
2. It is the opinion of the Engineering Department that the proposed 565 Lakota Lane
setback variance for the installation of an individual sewage treatment system (septic
system) can be approved (as it pertains to Engineering and Public Works requirements),
provided it fully addresses the comments and conditions contained herein.
3. The applicant is proposing to construct a septic system near the northwest corner of the
property located at 565 Lakota Lane due to the lack of public sanitary sewer system in
the area. The proposed location chosen is due to the topographic constraints of the
site, as a majority of the property is a bluff. The proposed location appears to be the
most feasible based on aerial reviews and the need to keep the septic system as far
from the bluff as possible. Additionally, the applicant has provided percolation tests,
soil borings and appropriate septic system designs showing the feasibility of the area
where the proposed septic system is to be constructed. However, due to the design
requirements of the above grade septic system coupled with the need to maintain the
furthest setback from the bluff as feasibly possible, a portion of the system will have to
encroach into public easements. See conditions 1 and 2.
Proposed Conditions
1. The property owner shall enter into an Encroachment Agreement with the City for the
area of the individual sewage treatment system (septic system) that encroaches into the
public easement. The final area of encroachment shall be determined by an as-built
survey of the septic system, and the Encroachment Agreement shall be recorded prior
to issuance of the Certificate of Compliance.
2. All underground components encroaching into the public easement and identified in the
Encroachment Agreement shall be detectable by customary locating equipment (i.e. the
installation of tracer wire). The tracer wire shall be tested and approved prior to
issuance of the Certificate of Compliance.
MEMORANDUM
TO: MacKenzie Young-Walters, Associate Planner
FROM: Jill Sinclair, Environmental Resources Specialist
DATE: June 2, 2020
SUBJ: 565 Lakota Lane, Variances to construct a septic system
Staff supports the request for a variance to construct a septic system in the front yard. This
option has the least amount of tree removal and environmental impact on the lot. The rear yard
locations, while possibly not requiring variances, would have significant tree removal and
potential impact on a bluff area.
AFFIDAVIT OF MAILING NOTICE
STATE OF MINNESOTA)
(ss
COUNTYOFCARVER )
I, Kim T. Meuwissen, being first duly swom, on oath deposes that she is and was on
May 21,2020, the duly qualified and acting Deputy Clerk of the City of Chanhassen, Minnesota;
that on said date she caused to be mailed a copy of the attached notice of Public hearing to
consider a rcquest for setback variances to install a septic system in the Nw corner of
property located at 565 Lakots Lane. Zoned Agricultural Estate District (A2), Planning
Case File No. 202047 to the persons named on attached Exhibit "A", by enclosing a copy of
said notice in an envelope addressed to such owner, and depositing the envelopes addressed to all
such owners in the United States mail with postage fully prepaid thereon; that the names and
addresses ofsuch owners were those app€aring as such by the records ofthe County Treasurer,
Carver County, Minnesota, and by other appropriate records.
U
Kim Meuwissen, Dep u lerk
Subscribed and swom to before me
thisal6|day of l- o5-,2020.
(Seal)
JEAII Mt{mryhtb.lft,..eltEhH.fr'l,i(.a
N otary Public
CITY OF CHANHASSEN
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Area
Disclainre,
This map as neither a legally recorded map nor a suNey and is not intended lo be used
.rs one This map is a compilation of recods, anfomatron and data locat€d jn various cly.
county, state and federal offces and other sourc€s regadang the area shown. and is !o
be us€d for reference purposes only. The City does not wa..ant thal the Geographic
lnformatron System (GlS) Oata used to prepare tiis map are enor free. and lhe Crty does
not represent that the GIS Data can be used for navigalional. t'acking or any other
purpose requinng exacting measurement of clistance ol direction or preciSaon an the
depicton of geographic features. The preceding disclaimer is provided puBuant lo
Minnesota Statrtes 5466.03, Subd. 21 (2000), and the user of this map ac*nowledges
that the Crty shall not be liable ior any clamages, and expressly waaves all dajms. and
agrees to clefend, indemnify. and hold hamless the city from any and all claims brought
by user. its employees or agents. or thid parties \a,ltidl arise oul ot the use/s access or
use of dala provided
Oisclaimel
This map is neither a legally recorded map no. a survey and is not intended to be used
asone. This map is a compilation of records, infomalion and data located in vadous city,
county, state and federaloffces and other sources regarding lhe area shown, and is to
be used for reference purposes only. The City does not warant that the GeogEtphic
lnformation System (GlS) Data used to prepare this map are enor ftee, and the City does
not represent that the GIS Oata can be used for navigational, lracking or any other
purpose requidng exactrng measurement of dastance ol direction or precision in the
depiction of geographic features The precedang disclaimer is provided pu6uant to
Minnesota Statutes 5466.03, Subd. 21 (2000). and the user ot thas map acknowledges
that the City shall not be liable tor any damages, and expressly waives all claims, and
agrees lo debnd, indemnat, and hold hamless the City f.om any and all claims brouoht
by lJser, its employees or agents, or third partres which arise oul of the useis access or
us€ of data provided
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