8a. Shadow Ridge Final Plat Approvali
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CITY OF
CHANHASSEN
690 COULTER DRIVE • P.O. BOX 147 • CHANHASSEN, MINNESOTA 55317
(612) 937 -1900 • FAX (612) 937 -5739
TO: Don Ashworth, City Manager
FROM: Bob Generous, Planner It
DATE: September 7, 1994
SUBJ: Shadow Ridge Final Plat, Subdivision #94 -4 and Rezoning #94 -2
BACKGROUND
City Council requested that this item come back
in order to verify that the applicant has incorporate
the development of the site. Staff believes that#&
preparing the final plat. Approximately 40 percent
environmental areas, tree or wetland conservation
square feet (0.54 acres). Approximately 62.-percent
space. The average net buildable area for 16ts in B
being dedicated as an outlot at this time . 11 reque
The applicant is requesting final
Lake Lucy Road and Yosemite.
approved the preliminary plat fo
acres of land, and rezoning (Rez
Single Family Residential, °consi
side setback varianc°e.from the;
and 10, Block l,;ranted a y
Action by Cky AdmWW
Endors A k/�
Modffie
Rejec
Dat
Date Submitted to CommiMM
Date Submitted to C4tR1 N
the regular agenda for final plat approval
environmentally sensitive standards in
applicant has shown this sensitivity in
6f the site is being dedicated as
Ct sizes in Block 1 average 23,427
of the lot area in Block 1 will be open
ock'I is 8,810 square feet. Block 2 is
;tedetland buffers are being maintained.
at approval for the Shs
�!the July 25, 1994 Ci
subdivision #94 -4 to ci
ing 94 -2) the property
nt with the City's Cora
Ridge development located at
luncil meeting, the City Council
17 lots and one outlot on 15.99
RR, Rural Residential to RSF,
ensive Plan, approved a 10 foot
t for flag lots for Lots 5, 9,
)t_front setback reauirement for
Lots 3 through l "lock „1 to permit a 20 foot front setback and`a`'
from the 30 foot front setback to permit a 25 foot setback on Lot 2,
following conditions: w
w �
variance
ect to the
1. The applicant shall provide detailed storm "ewer calculations for 10 -year and 100 -year
storm events and provide ponding captions for stormwater quality /quantity ponds in
accordance with the City's Surface Water Management Plan for the City Engineer to
review and approve. The applicant shall provide detailed pre - developed and post-
developed stormwater calculations for 100 -year storm events. Normal water level and
high water level calculations in existing basins and individual storm sewer calculations
between each catch basin segment will also be required to determine if sufficient catch
J
� Don Ashworth, City Manager
August 7, 1994
' Shadow Ridge Final Plat
Page 2
basins are being utilized.. In addition, water quality ponding design calculations shall
be based on Walker's Pondnet model.
' 2. The proposed development will be responsible for a water quantity assessment fee of
$25,938.00 assuming 13.1 acres of developable land. Water quality assessments will
be waived if the applicant constructs an on -site Walker pretreatment basin. These fees
' will be negotiated based on the developers contribution to the City's SWMP for the
site. SWMP fees for water quantity and quality are pending formal approval of the
SWMP by City Council. If there are any modifications to the fees, they will be
' changed prior to final plat.
3. Stormwater runoff from Lot 16 and the access road is shown to discharge to Lake
Lucy Road. The applicant shall demonstrate that the runoff from this portion of land
can be handled by the existing drainage system on Lake Lucy Road. Detailed storm
calculations shall be provided to the City Engineer.
4. The applicant shall report to the City Engineer the location of all drain tiles found
during construction. Drain tile shall be relocated or abandoned as directed by the City
' Engineer.
5. The existing home on Lot 1, Block 1 will be required to connect to City water once
the well on the property fails.
6. The applicant shall work with staff in determining the most feasible location to extend
' sanitary sewer and water services to the north (Stewart parcel).
7. The grading plan shall be revised to limit the house types on Lots 2, 3, 6 and 7, Block
1 to rambler style homes and Lots 4, 5, 8 and 13, Block 1 to side /corner walkout type
dwelling. The lot grading on Lots 2 and 3, Block 1 shall be revised to maintain the
' existing "sheet flow" to the west. Concentrated or funnelled runoff shall be
prohibited.
8. The existing outbuildings and any septic system or wells on the site shall be
abandoned in accordance with City and/or State codes.
9. The stormwater retention pond shall be relocated further to the northeast on Lots 10
and 11. The storm sewer system between Lots 15 and 16, Block 1 shall be redirected
within the proposed street and combined into one discharge point on Lot 11, Block 1.
10. Lots 1 through 5, Block 2 shall be platted as an outlot due to the lack of adequate
utilities and street. This outlot would not be subdividable or buildable until Yosemite
t
Don Ashworth, City Manager
�
August 7, 1994
Shadow Ridge Final Plat
Page 3
Road is upgraded to the City's urban standard, municipal sanitary sewer and water is
extended adjacent to the parcel, and wetland setback and buffer area issues are
resolved.
11. Drainage and utility easements shall be dedicated for all utility lines outside the plat.
The minimum easement width should be 20 feet.
12. The applicant shall enter into a development contract with the City and provide the '
necessary financial security to guarantee the installation of the public improvements
and compliance of the conditions of approval. '
13. All utility and street improvements shall be constructed in accordance with the latest
edition of the City's Standard Specifications and Detail Plates. Detailed street and
'
utility construction plans and specifications shall be submitted to staff for review and
formal approval by the City Council in conjunction with final plat consideration.
14. The applicant shall apply for and obtain the necessary permits from the Watershed
PP PP Y az'Y P
District, DNR, Department of Health, MPCA and other appropriate regulatory agencies
'
and comply with their conditions of approval.
15. Upon completion of site grading, all disturbed areas shall be restored with seed and
disc - mulched or wood -fiber blanket within two weeks of completing the site grading
unless the City's Best Management Practice Handbook planting dates dictate
otherwise. All erosion control measures shall be in accordance to the City's Best
Management Practice Handbook.
16. Upon completion, the developer shall dedicate to the City the utility and street
improvements within the public right -of -way and drainage and utility easements for
permanent ownership.
17. Wetland buffer areas shall be surveyed and staked in accordance with the City's
wetland ordinance. The city will install wetland buffer edge signs before construction
begins and will charge the applicant $20 per sign.
18. Prior to the final plat approval, a Woodland Management Plan and Tree preservation
Plan must be developed by a landscape professional pursuant to section 18 -61(d) of
the City Code. This plan must be submitted to the city for staff approval.
19. A 25 foot front setback is allowed on Lot 2, Block 1 and a 20 foot front setback is
granted on Lots 3 through 16, Block 1 to move the building pads away from the top
of the slope and to preserve trees. The applicant shall incorporate retaining walls and
i
Don Ashworth, City Manager
August 7, 1994
Shadow Ridge Final Plat
' Page 4
custom grading to assure that slopes and trees are minimally impacted. Staff
1 encourages the developer to incorporate bluff protection guidelines in the development.
20. Pay park and trail fees as specked by city ordinance.
' 21. Submit revised utility lans for approval of locations of fire hydrants. Fire hydrant
P PP Y Y
spacing is 300 foot maximum.
' 22. A ten foot clears ace must be maintained p taz ed around all fire hydrants, 2.e. street lamps,
' trees, shrubs, bushes, NSP, NW Bell, cable TV, transformer boxes. This is to ensure
that fire hydrants can be quickly located and safely operated.
' 23. Submit turning radius and cul -de -sac dimensions to the City Engineer and Fire
Marshal for approval.
24. Advise Fire Marshal of the status of water main and fire hydrant placement and
spacing on Yosemite Avenue, west of Lots 1 - 5, Block 2.
25. Revise the preliminary grading plan to show the location of house pads, using standard
designations, and lowest level floor and garage elevations prior to final plat approval.
' 26. The tree preservation areas shall be delineated on the final grading plan as part of the
final plat approval. The tree preservation areas in Lots 2, 3, 11, 12, 14, and 15 shall
be re- evaluated and either be revised or realigned to avoid the grading areas, or have
the grading plan revised to stay out of the tree preservation areas, or have the
woodland management plan address the replanting of these areas.
27. Calculations for buildable space on each lot shall be forwarded to City Council.
28. In conjunction with submittal of a building permit application for Lot 17, Block 1, the
' applicant shall submit detailed grading, drainage and erosion control plan subject to
the Watershed District's approval prior to the issuance of a building permit.
Fi
29. The grading of the outlot is contingent on the applicant providing type I erosion
control around the wetlands and maintaining a minimum 20 foot buffer strip around
the northerly wetland (basin 3) and a minimum 30 foot buffer strip around the
southerly wetland (basin 2) as part of the revised grading plan.
t
Don Ashworth, City Manager
August 7, 1994
Shadow Ridge Final Plat '
Page 5
REVIEW OF CONDITIONS OF APPROVAL
Staff has reviewed the conditions of approval and made a determination of the compliance
with the conditions. '
1. The applicant shall provide detailed storm sewer calculations for 10 -year and 100 -year
storm events and provide ponding calculations for stormwater quality /quantity ponds in ,
accordance with the City's Surface Water Management Plan for the City Engineer to
review and approve. The applicant shall provide detailed pre - developed and post -
developed stormwater calculations for 100 -year storm events. Normal water level and '
high water level calculations in existing basins and individual storm sewer calculations
between each catch basin segment will also be required to determine if sufficient catch
basins are being utilized. In addition, water quality ponding design calculations shall
be based on Walker's Pondnet model.
* This condition has been met.
'
2. The proposed development will be responsible for a water quantity assessment fee of
$25,938.00 assuming 13.1 acres of developable land. Water quality assessments will
'
be waived if the applicant constructs an on -site Walker pretreatment basin. These fees
will be negotiated based on the developers contribution to the City's SWMP for the
site. SWMP fees for water quantity and quality are pending formal approval of the
SWMP by City Council. If there are any modifications to the fees, they will be
changed prior to final plat.
* This condition still applies, but shall be modified as follows to include only
Block 1 at this time:
The proposed development will be responsible for a water quantity fee of $20,247
assuming 10.2 acres of developable land. This fee has not included the wetlands on
site or Outlot A. The applicant shall supply the City with a letter of credit to cover
,
the SWMP fees until the SWMP fees are finalized by the City Council. If there are
any modifications to the fees, the developer will be charged accordingly.
3. Stormwater runoff from Lot 16 and the access road is shown to discharge to Lake
Lucy Road. The applicant shall demonstrate that the runoff from this portion of land
'
can be handled by the existing drainage system on Lake Lucy Road. Detailed storm
calculations shall be provided to the City Engineer.
'
* This condition has been met.
Don Ashworth, City Manager
August 7, 1994
Shadow Ridge Final Plat
Page 6
4. The applicant shall report to the City Engineer the location of all drain tiles found
' during construction. Drain tile shall be relocated or abandoned as directed by the City
Engineer.
* This condition still applies.
5. The existing home on Lot 1, Block 1 will be required to connect to City water once
' the well on the property fails.
* This condition still applies.
' 6. The applicant shall work with staff in determining pp determi ng the most feasible location to extend
sanitary sewer and water services to the north (Stewart parcel).
* This condition has been met.
' 7. The grading plan shall be revised to limit the house types on Lots 2, 3, 6 and 7, Block
1 to rambler style homes and Lots 4, 5, 8 and 13, Block 1 to side /corner walkout type
dwelling. The lot grading on Lots 2 and 3, Block 1 shall be revised to maintain the
existing "sheet flow" to the west. Concentrated or funnelled runoff shall be
prohibited.
' * This condition has been met.
I 8. The existing outbuildings and any septic system or wells on the site shall be
abandoned in accordance with City and/or State codes.
* This condition still applies.
9. The stormwater retention pond shall be relocated further to the northeast on Lots 10
and 11. The storm sewer system between Lots 15 and 16, Block 1 shall be redirected
within the proposed street and combined into one discharge point on Lot 11, Block 1.
* This condition has been met.
10. Lots 1 through 5, Block 2 shall be platted as an outlot due to the lack of adequate
' utilities and street. This outlot would not be subdividable or buildable until Yosemite
Road is upgraded to the City's urban standard, municipal sanitary sewer and water is
' extended adjacent to the parcel, and wetland setback and buffer area issues are
resolved.
a
Don Ashworth, City Manager
August 7, 1994
Shadow Ridge Final Plat '
Page 7
* This condition still applies, but shall be modified as follows: '
Outlot A will not be subdividable or buildable until Yosemite Road is upgraded to the
City's urban standard, municipal sanitary sewer and water is extended adjacent to the '
parcel, and wetland setback and buffer area issues are resolved.
11.
Drainage and utility easements shall be dedicated for all utility lines outside the plat.
'
The minimum easement width should be 20 feet.
* This condition has been met.
'
12.
The applicant shall enter into a development contract with the City and provide the
necessary financial security to guarantee the installation of the public improvements
and compliance of the conditions of approval.
* This condition still applies.
'
13.
All utility and street improvements shall be constructed in accordance with the latest
edition of the City's Standard Specifications and Detail Plates. Detailed street and
utility construction plans and specifications shall be submitted to staff for review and
formal approval by the City Council in conjunction with final plat consideration.
This condition still applies.
14.
The applicant shall apply for and obtain the necessary permits from the Watershed
'
District, DNR, Department of Health, MPCA and other appropriate regulatory agencies
and comply with their conditions of approval.
'
This condition still applies.
15.
Upon completion of site grading, all disturbed areas shall be restored with seed and
disc - mulched or wood -fiber blanket within two weeks of completing the site grading
unless the City's Best Management Practice Handbook planting dates dictate
'
otherwise. All erosion control measures shall be in accordance to the City's Best
Management Practice Handbook.
*
This condition still applies.
16. Upon completion, the developer shall dedicate to the City the utility and street '
improvements within the public right -of -way and drainage and utility easements for
permanent ownership.
Don Ashworth, City Manager
August 7, 1994
Shadow Ridge Final Plat
' Page 8
* This condition still applies.
' 17. Wetland buffer areas shall
be surveyed and staked in accordance with the City's
wetland ordinance. The city will install wetland buffer edge signs before construction
begins and will charge the applicant $20 per sign.
* This condition still applies.
18. Prior to the final plat approval, a Woodland Management Plan and Tree preservation
' Plan must be developed by a landscape professional pursuant to section 18 -61(d) of
the City Code. This plan must be submitted to the city for staff approval.
* This condition has been partially met and should be revised as follows:
A copy of the Woodland Management Plan shall be provided to every lot purchaser.
' The Woodland Management Plan shall be complied with in the development of the
site and the individual lots.
19. A 25 foot front setback is allowed on Lot 2, Block 1 and a 20 foot front setback is
granted on Lots 3 through 16, Block 1 to move the building pads away from the top
of the slope and to preserve trees. The applicant shall incorporate retaining walls and
' custom grading to assure that slopes and trees are minimally impacted. Staff
encourages the developer to incorporate bluff protection guidelines in the development.
' * This condition still applies.
20. Pay park and trail fees as specified by city ordinance.
' * This condition still applies.
21. Submit revised utility plans for approval of locations of fire hydrants. Fire hydrant
spacing is 300 foot maximum.
* This condition has been met.
22. A ten foot clear space must be maintained around all fire hydrants, i.e. street lamps,
trees, shrubs, bushes, NSP, NW Bell, cable TV, transformer boxes. This is to ensure
that fire hydrants can be quickly located and safely operated.
* This condition still applies.
f
Don Ashworth, City Manager
August 7, 1994
Shadow Ridge Final Plat ,
Page 9
23. Submit turning radius and cul -de -sac dimensions to the City Engineer and Fire I
Marshal for approval.
* This condition has been met. ,
24. Advise Fire Marshal of the status of water main and fire hydrant placement and
spacing on Yosemite Avenue, west of Lots 1 - 5, Block 2.
* This condition is no longer applicable.
25. Revise the preliminary grading plan to show the location of house pads, using standard ,
designations, and lowest level floor and garage elevations prior to final plat approval.
* This condition still applies, however, it shall be modified as follows: '
Revise the grading plan to show the type of house pads, using the City's standard
'
house designations, and lowest floor and garage elevations.
25. The tree preservation areas shall be delineated on the final grading plan as part of the
'
final plat approval. The tree preservation areas in Lots 2, 3, 11, 12, 14, and 15 shall
be re- evaluated and either be revised or realigned to avoid the grading areas, or have
the grading plan revised to stay out of the tree preservation areas, or have the
,
woodland management plan address the replanting of these areas.
* This condition has been met.
,
27. Calculations for buildable space on each lot shall be forwarded to City Council.
This condition has been met.
28. In conjunction with submittal of a building permit application for Lot 17, Block 1, the
,
applicant shall submit detailed grading, drainage and erosion control plan subject to
the Watershed District's approval prior to the issuance of a building permit.
* This condition still applies.
29. The grading of the outlot is contingent on the applicant providing type I erosion
control around the wetlands and maintaining a minimum 20 foot buffer strip around
the northerly wetland (basin 3) and a minimum 30 foot buffer strip around the
'
southerly wetland (basin 2) as part of the revised grading plan.
iul
Don Ashworth, City Manager
August 7, 1994
Shadow Ridge Final Plat
Page 10
* This condition has been met.
Upon review of the construction plans, staff has determined the need for the following
conditions of approval:
30. Site grading may commence on the project in accordance to the approved plans
after the applicant has executed the development contract for Shadow Ridge and
provided the City with the necessary administration fees, security deposit and
Watershed approval.
31. The storm basin located on Lots 11, 12, 14, 15 and 17, Block 1 shall be designed
at either 4:1 slopes overall of 10:1 slopes for the first 10 feet below the normal
water level and 3:1 slopes thereafter.
32. The final plat shall be revised to dedicate the northerly 30 feet of Outlot A as
street right -of -way.
FINAL PLAT
PROPOSAL SUMMARY
' The applicant has submitted detailed construction plans and specifications for staff review and
City Council approval. Staff has reviewed the construction plans and specifications and has
found them in general conformance with the City standards.
The proposed subdivision creates 17 lots and 1 outlot. The average lot size in Block 1 is
23,427 square feet or approximately 0.54 acres. Lot sizes range from 15,170 square feet to
55,005 square feet in area with a net buildable area ranging from 5,800 to 20,880 square feet.
All of the lots comply with the minimum requirements for a single - family subdivision in the
RSF zoning district. Outlot A is currently undevelopable due to the lack of adequate utilities
and street. This outlot would not be subdividable or buildable until Yosemite Road is
upgraded to the City's urban standard, municipal sanitary sewer and water is extended
adjacent to the parcel, and wetland setback and buffer area issues are resolved. The applicant
has prepared a Woodland Management Plan that provides guidelines for the protection of
trees as part of the development process and post development care. The applicant is
dedicating approximately 6.4 of land as part of the tree conservation (4.5 acres) and wetland
protection (1.9 acres) area. City code requires a minimum of 35 percent post development
canopy coverage for this development. This amounts to 4.57 acres of canopy coverage. The
applicant is dedicating 4.5 acres as tree preservation area. Through the use of the Woodland
Management Plan and custom site grading, additional canopy coverage will be saved and the
minimum canopy preservation will be exceeded.
Don Ashworth, City Manager
August 7, 1994
Shadow Ridge Final Plat ,
Page 11
STREETS I
The proposed street falls within the City's ordinance of 7% maximum street grade. The final
plat proposes Shadow Lane with a 60 -foot wide right -of -way with a 31 -foot wide street in ,
accordance with City ordinance. An additional 7 feet of right -of -way is being dedicated for
Lake Lucy Road. At this time, Oudot A is not being platted due to lack of municipal utility
service; however, the applicant is providing adequate right -of -way for future upgrade of I
Yosemite Avenue.
Detailed street and utility construction plans and specifications have been submitted for staff '
review and formal City Council approval. Staff has reviewed the construction documents and
finds them in general conformance with the City's Specifications and Detail Plates. Upon
review of these documents, staff finds only minor changes are required. Staff recommends '
that the City Council grant staff the flexibility to work with the developer's engineer in
modifying the plans accordingly to meet City standards.
The arcel north of this development (Stewart) is essentially landlocked from Yosemite
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Avenue and this development. Currently, access is obtained through a private driveway
easements. Staff recommends that the applicant dedicate one -half of the normal right -of -way '
along the northerly 30 feet of Outlot A for future road access to the Stewart parcel. The final
plat should be amended to include a 30 -foot wide right -of -way over the northerly portion of ,
Outlot A.
UTILITIES I
Municipal sanitary sewer and water service is available to the site. The existing sanitary and
water mains are adequately sized to handle the anticipated development. The applicant is also '
proposing to extend sanitary sewer and water service to the north boundary of the plat for
future extension into the adjacent parcel. Staff has reviewed the utility construction plans and
specifications for the public improvements in this project and finds that the specifications are ,
in general accordance to City standards; however, the construction plans still need some
additional minor modifications. Staff is comfortable working with the developer's engineer in
modifying the plans accordingly. '
GRADING AND DRAINAGE
The grading and drainage plan has been revised to comply with the applicable conditions of ,
approval from the preliminary plat review process. Staff believes the grading and drainage
plan has been designed to minimize grading and impact to the areas containing trees. Many
of the house pads have been redesigned to minimize grading.
Don Ashworth, City Manager
August 7, 1994
Shadow Ridge Final Plat
' Page 12
(Lot 17) which is adjacent to Lake Lucy Road is located on a very steep slope with some
scattered trees. This lot is also adjacent to a natural wetland as well. Staff has reviewed this
lot from a feasibility standpoint with the applicant and believes a house pad can be massaged
to the easterly portion of the lot with the driveway access onto Lake Lucy Road.
Construction of this lot may require some retaining walls in an effort to minimize grading and
tree loss. A detailed grading, drainage and erosion control plan subject to Watershed and
City approval shall be required prior to the issuance of a building permit.
' The plans also proposed a storm water quality treatment pond adjacent to the natural wetlands
on Lots 11, 12, 14, 15 and 17, Block 1. The pond location has been set back a minimum of
' 10 feet from the natural wetland. However, the pond design is unclear whether it has met
staff's recommendations with regards to side slopes. Staff previously indicated the side
slopes can be designed at either 4:1 overall or 10:1 for the first 10 feet below the normal
water level and 3:1 thereafter for safety purposes.
' The City has calculated the Surface Water Management Fees (SWMP) for this parcel. Staff
did not include any wetlands or Outlot A which will be platted some time in the future. Staff
has calculated a total of 10.2 acres being developed at this time. According to SWMP, the
fees for a single - family development are $1,985 /acres. The proposed development would then
' be responsible for a water quantity fee of $20,247 assuming 10.2 acres of developable land.
The water quality fees are being waived since the applicant is providing a water quality basin
in accordance to SWMP.
Since time is essential, the applicant has requested the City grant permission to commence
site grading as soon as possible. Typically, the City authorizes a notice to proceed with
construction activities once the development contract has been executed, the administration
fees and security escrow have been received and the final plat recorded at the County.
Unfortunately, this takes approximately two to three weeks after final plat approval has been
granted. The City has in the past allowed site grading to commence prior the final plat being
recorded at the County conditioned upon the applicant supplying the City with the
administration fees, security deposit and executed development contract. Since the
construction window is closing quickly, staff is in support of allowing the applicant to
commence site grading prior to the final plat being recorded contingent upon the applicant
supplying the City with an executed development contract, administration fees and security
deposit.
' EROSION CONTROL
The applicant has prepared a grading, drainage and erosion control plan in general accordance
with the City's Best Management Practice Handbook.
t
Don Ashworth, City Manager
August 7, 1994
Shadow Ridge Final Plat ,
Page 13
RECOMMENDATION
,
Staff recommends that the City Council adopt the following motion:
"The
,
City Council approves the requests for #94 -4 Subdivision and #94 -2 Rezoning (second
and final reading) approving the final plat on 15.99 acres of land to create 17 single family
lots and 1 outlot, rezoning of the property from RR, Rural Residential to RSF, Residential
,
Single Family Residential, a front yard setback variance of 10 feet to permit a front yard
setback of 20 feet for Lots 3 through 16, Block 1, a front yard setback variance of 5 feet to
permit a 25 foot front yard setback on Lot 2, Block 1, and a 10 foot side yard setback
'
variance from the 20 foot side yard setback requirement for flag lots for Lots 5, 9, and 10,
Block 1, based on the final plat dated August 29, 1994 subject to the following conditions:
1. The final F lat shall be revised to dedicate the northerly 30 feet of Outlot A as street
right -of -way.
'
2. The ro osed development will be responsible for a water quantity fee of $20,247
P F F F q tY
assuming 10.2 acres of developable land. This fee has not included the wetlands on
site or Outlot A. The applicant shall supply the City with a letter of credit to cover
,
the SWMP fees until the SWMP fees are finalized by the City Council. If there are
any modifications to the fees, the developer will be charged accordingly.
3. The applicant shall report to the City Engineer the location of all drain tiles found
during construction. Drain tile shall be relocated or abandoned as directed by the City
'
Engineer.
4. The existing home on Lot 1, Block 1 will be required to connect to City water once I
the well on the property fails.
5. The existing outbuildings and any septic system or wells on the site shall be I
abandoned in accordance with City and/or State codes.
6. The applicant shall enter into a development contract with the City and provide the
necessary financial security to guarantee the installation of the public improvements
and compliance of the conditions of approval.
7. All utility and street improvements shall be constructed in accordance with the latest '
edition of the City's Standard Specifications and Detail Plates. Detailed street and
utility construction plans and specifications shall be submitted to staff for review and
formal approval by the City Council in conjunction with final plat consideration.
i
Don Ashworth, City Manager
August 7, 1994
' Shadow Ridge Final Plat
Page 14
8.
The applicant shall apply for and obtain the necessary permits from the Watershed
District, DNR, Department of Health, MPCA and other appropriate regulatory agencies
and comply with their conditions of approval.
9.
Upon completion of site grading, all disturbed areas shall be restored with seed and
disc - mulched or wood -fiber blanket within two weeks of completing the site grading
unless the City's Best Management Practice Handbook planting dates dictate
otherwise. All erosion control measures shall be in accordance to the City's Best
Management Practice Handbook.
'
10.
Upon completion, the developer shall dedicate to the City the utility and street
improvements within the public right -of -way and drainage and utility easements for
permanent ownership.
11.
Wetland buffer areas shall be surveyed and staked in accordance with the City's
wetland ordinance. The city will install wetland buffer edge signs before construction
begins and will charge the applicant $20 per sign.
12.
Pay park and trail fees as specified by city ordinance.
13.
A ten foot clear space must be maintained around all fire hydrants, i.e. street lamps,
trees, shrubs, bushes, NSP, NW Bell, cable TV, transformer boxes. This is to ensure
that fire hydrants can be quickly located and safely operated.
14.
Revise the grading plan to show the type of house pads, using the City's standard
house designations, and lowest floor and garage elevations.
15.
In conjunction with submittal of a building permit application for Lot 17, Block 1, the
applicant shall submit detailed grading, drainage and erosion control plan subject to
'
the Watershed District's approval prior to the issuance of a building permit.
16.
Site grading may commence on the project in accordance to the approved plans after
the applicant has executed the development contract for Shadow Ridge and provided
the City with the necessary administration fees, security deposit and Watershed
approval.
17.
The storm basin located on Lots 11, 12, 14, 15 and 17, Block 1 shall be designed at
either 4:1 slopes overall of 10:1 slopes for the first 10 feet below the normal water
level and 3:1 slopes thereafter.
t
Don Ashworth, City Manager
August 7, 1994
Shadow Ridge Final Plat '
Page 15
18. Outlot A will not be subdividable or buildable until Yosemite Road is upgraded to the
City's urban standard, municipal sanitary sewer and water is extended adjacent to the
parcel, and wetland setback and buffer area issues are resolved.
19. A copy of the Woodland Management Plan shall be provided to every lot purchaser.
The Woodland Management Plan shall be complied with in the development of the
site and the individual lots. ,
20. A 25 foot front setback is allowed on Lot 2, Block 1 and a 20 foot front setback is
granted on Lots 3 through 16, Block 1 to move the building pads away from the top '
of the slope and to preserve trees. The applicant shall incorporate retaining walls and
custom grading to assure that slopes and trees are minimally impacted. Staff
encourages the developer to incorporate bluff protection guidelines in the development.
ATTACHMENTS
1. Woodland Management Plan '
2. Final Plat, Shadow Ridge
c: Dave Hempel, Asst. City Engineer I
1
u
61
' WOODLAND MANAGEMENT PLAN
FOR
SHADOW RIDGE SUBDIVISION
CHANHASSEN ,MINNESOTA
F1
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Coffman Development Company
117 Sentinal Building
5151 Edina Industrial Boulevard
Edina, Minnesota 55439
Kevin G. Norby & Associates, Inc.
Landscape Architects
10901 Red Circle Drive, Suite 125
Minnetonka, Minnesota 55343
(612) 938 -0020
SCHEDULE
PAGE NUMBER DESCRIPTION
1 Preservation and reforestation
2 Management and landscaping
3 Tree preservation map
4 Landscape Plan
CERTIFICATION
I hereby certify that this plan, specifications or report was prepared by me or under my direct super-
vision and that I am a duly Registered Landscape Architect under the laws of the State of Minnesota.
KEVIN G. NORBY &ASSOCIATES, INC.
Kevin Norby
Registration Number
Z 2
Date
a
Shadow Ridge subdivision consists of twenty two single family homesites situated on 15.99 acres in
Chanhassen, Minnesota. Mapping and on -site analysis indicates that overstory vegetation consist of primarily
of boxelder, apple and american elm as well as some northern hardwood species such as red oak, pin oak,
basswood and sugar maple. Secondary or understory vegetation consists of black cherry, buckthorn, currant,
elder and sumac. There is a small concentration of northern catalpa on lots 15 and 16, block one, which
consists of a 30 inch parent tree and numerous seedings ranging from 1 to 14 inches in caliper. A number of
these seedlings as well as numerous 8 -12 foot cedar would be good candidates for transplanting on -site. In
addition, there are a number of trees(spruce, sugar maple and ash) which were planted by the previous
landowner(s) that can be moved on -site to provide screening and buffering. The dominant herbaceous
' groundcover consists of virginia creeper, nightshade, grape, yarrow and various native and non - native grasses.
It is the developer's intent to minimize disturbance of existing vegetation and, therefore, preserve the
existing natural character of the site. Approximately 4.5 acres of the proposed development have been
designated as tree preservation areas( see page 3). These areas shall be designated on -site by steel posts and
signs to be located at all corners and again every 300 feet. Within these areas there shall be no removal of
existing plant material for the purpose of constructing trails, sheds, swimming pools or play structures, etc..
All owners of property in Shadow Ridge shall refrain from altering the grade of the terrain, and refrain from
cutting, destroying or removing foliage or vegetation of any kind whatsoever EXCEPT to facilitate the proper
surface drainage, to remove noxious or offensive weeds and dead, diseased or hazardous trees from the
' preservation areas.
TREE PRESERVATION
' It is anticipated that there will be some tree loss due to installation of roads and utilities. In an attempt to
minimize additional secondary tree loss due to grading opertations the following practices shall be
' implemented. It is recommended that the individual builders and homeowners consider these same
practices.
In areas where it is expected that site grading may expose or cut roots the developer will be trenching along
' the area of disturbance to a depth of 36 ". This procedure minimizes broken or torn roots and reduces the
surface area of damaged root tissue where dehydration and root pathogen infection may occur.
Trees which are located near construction areas may also be susceptable to compaction resulting from heavy
equipment traffic. The developer shall be installing snow fencing around preservation areas and around
significant trees or vegetation masses to minimize root suffocation due to compaction and filling. Trees
' affected by compaction shall be core areated to a depth of 18" every 25 square feet at their dripline.
Individual holes should be filled with a garanular material such as vermiculite or pea gravel to facilitate
oxegen transmission to the root zone.
' In areas where significant grade alteration may occur, small retaining walls may be constructed to minimize
cutting or filling of soil within the tree's dripline.
I REFORESTATION
Areas which are disturbed during the construction of roads shall be reforested by the developer so as to
provide privacy, buffering and erosion control. The northerly sixty feet of the east property line of lot 10
block one shall be planted with six evergreens( cedar) transplanted from on -site to provide buffering from
the neighboring homeowners to the east. These trees shall be 8 -14 feet tall. In addition, the developer shall
install ten (10) machine moved trees (spruce) along the south property line of lot 2 block two to provide
privacy for the homeowner to the south. This area shall also have 135 feet of six (6) foot cedar privacy
fencing installed for additional screening. The trees shall be 7 -14 foot tall and shall include both nursery
stock and existing trees transplanted from on -site.
F
I
Other areas with some potential for erosion should, depending on exposure to sunlight, be sodded or planted '
with a combination of shrubs and perennial groundcovers such as dogwood, honeysuckle, virginia creeper,
daylily and seeded native or turf grasses such as rye, bluegrass, fescue, little bluestem.
Finally, one tree per lot shall be planted on those lots which have no front yard trees as required per the
City ordinance.
POST- CONSTRUCTION TREE MANAGEMENT
Trees affected by construction should receive occasional long, deep waterings. Homeowners should give
particular attention to the side of the tree which has not been disturbed. Also, it is recommended that trees
not be pruned in an attempt to reduce branching structure in proportion to root loss. Rather, corrective
pruning should be performed on an annual basis or as required to remove deadwood and maintain a strong
branching structure. This allows the individual tree to selectively reduce leaf surface area naturally. All
branches and wood from tree removal and pruning should be immediately removed from the site so as not to
attract pathogen carrying insects. No pruning of oak trees should be done between April 1 and September 1 '
in order to minimize the risk of oak wilt infection.
Fertilizing of mature trees is generally not required unless a specific nutrient deficiency has been identified, '
such as iron chlorosis in oaks. In the event that fertilizing is desired, a slow release low nitrogen or balanced
composition fertilizer, such as 7 -21 -12 or 10- 10 -10, is preferred. This will help encourage a strong root
system and minimize additional foliar growth which may further stress a weakened tree.
LANDSCAPING
Whenever possible homebuilders and homeowners should strive to maintain and enhance the natural '
character of the site. The planting of additional trees, shrubs and groundcovers is encouraged however,
improvements should be designed and installed in a manner which will minimize the need for fertilizing and
removal of existing vegetation. In heavily shaded areas, it is recommended that plantings of species such as '
maple, dogwood and serviceberry as well as native herbaceous groundcovers such as virginia creeper,
bloodroot, hepatica and Solomon's seal be utilized to revegetate contruction areas and erosion areas.
Shredded hardwood mulch or wood fiber erosion blanket may be used in conjunction with the plantings for '
additional erosion control. In low lying areas plantings which tolerate wet soils such as red maple, birch,
and dogwood should be used.
Shaded areas should not be sodded since turf type grasses commonly found in sod generally have relatively '
high light requirements and will not survive in low light applications. Sodded or seeded lawn areas should
be installed primarily between the proposed residence and the street. '
Retaining walls should be constructed of indigenous stone so as to maintain the natural character of the site.
Plantings around individual residences may include both native and non - native perennial shrubs and
groundcovers such as viburnum, spirea, yew, juniper, daylily and hosta. Building perimeters shall be edged
and mulched to prevent erosion, soil staining and to minimize maintenace. Mulch materials shall be a
combination of rock and natural bark mulches depending on drainage and plant species as determined by the
homeowner's landscape architect.
TREE PRESERVATION AREAS '
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