06 Galpin EC 100920Ali II SII I��I i
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I HEREBY CERTIFY THAT THIS PLAN OR SPECIFICATION WAS
PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT 1
AMA DULY REGISTERED PROFESSIONAL ENGINEER UNDER THE
LAWS OF THE STATE OF MINNESOTA.
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CITY PROJECT NO.
EROSION CONTROL PLAN
THE E�LUFFS AT LANCE LUCY
THREE DEVELOPMENT, INC.
sheets Erosion 03
CONSTRUCTION NOTES:
1. GRADING CONTRACTOR TO ANTICIPATE HAUL ROUTES TO BE LUCY RIDGE LANE AND
GALPIN BLVD (C.R. 117) UNLESS INDICATED/REQUESTED OTHERWISE WITH CITY
ENGINEER APPROVAL.
2. RESPECTIVE CONTRACTORS TO ANTICIPATE POTENTIAL GRADING AND UTILITY
STAGING AREAS AS SHOWN UNLESS INDICATED/REQUESTED OTHERWISE WITH CITY
ENGINEER APPROVAL.
3. TEMPORARY SEDIMENT BASIN LOCATIONS TO BE DETERMINED BY GRADING
CONTRACTOR. BASIN LOCATIONS CAN BE ADDED TO PLANS IF NECESSARY.
PROPOSED DETENTION BASINS MAY BE USED AS TEMPORARY BASINS - IF SO,
ACCUMULATED SEDIMENT MUST BE REMOVED TO RESTORE THE REQUIRED
PERMANENT POOL VOLUME AND AN ASBUILT PROVIDED.
4. GRADING CONTRACTOR TO ANTICIPATE POTENTIAL STOCKPILE AREAS AS SHOWN
UNLESS INDICATED OR REQUESTED OTHERWISE WITH CITY ENGINEER APPROVAL.
6. INFILTRATION AREA -
6.1. SEDIMENT CONTROLS MUST PREVENT DISCHARGE OF SEDIMENT TO BASIN
6.2. AREA TO BE PROTECTED FROM HEAVY EQUIPMENT
6.3. BASIN AREA NOT TO BE EXCAVATED TO FINAL GRADE OR SAND MATERIAL NOT PLACED
UNTIL CONTRIBUTING DRAINAGE AREAS HAVE BEEN CONSTRUCTED
7. GRADING TO OCCUR IN PROPOSED AREAS ONLY, EXISTING GROUND COVER TO REMAIN ASIS
8. DISTURBED AREAS NEAR AND ALONG THE BANKS OF THE WATERCOURSE BE IMMEDIATELY
STABILIZED AFTER COMPLETION OF THE WORK (RULE G, SUBSECTION 3.7b)
9. ALL EROSION CONTROL NOTED ON THE APPROVED PLAN SHALL BE INSTALLED PRIOR TO THE
INITIATION OF ANY SITE GRADING.
10. STREET SWEEPING TO OCCUR IN THE EVENT OF ANY SOIL TRACKING OFFSITE THROUGHOUT
THE DURATION OF CONSTRUCTION
5. UTILITY CONTRACTOR TO ESTABLISH DEWATERING PLAN WITH CITY AND CITY 11. SWPPP TO BE PROVIDED AS REQUESTED AND AVAILABLE FOR REVIEW.
ENGINEER APPROVAL IF NEEDED.
EXISTING UTILITIES SHOWN ARE SHOWN IN AN APPROXIMATE WAY ONLY. THE
CONTRACTOR SHALL DETERMINE THE EXACT LOCATION OF ANY AND ALL EXISTING
UTILITIES BEFORE COMMENCING WORK. HE AGREES TO BE FULLY RESPONSIBLE FOR ANY
AND ALL DAMAGES ARISING OUT OF HIS FAILURE TO EXACTLY LOCATE AND PRESERVE ANY
AND ALL EXISTING UTILITIES.
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Construction Schedule:
Site Grading (including tree clearing): 6-7 weeks
Utility Construction: 5-6 weeks
Street Construction: 3 weeks
Minor Uitilty Installation: 2 weeks
Sidewalk and Final Restoration 2 weeks
Anticipated Grading Start Date: October 12, 2020
PROPOSED CONSTRUCTION
DISTURBED AREA = +/-19.6 ACRES
ONSITE BMPS
1. SILT FENCE - BEFORE CONSTRUCTION = 9,525 IF
2. SILT FENCE - AFTER CONSTRUCTION = 940 LF
3. EROSION BLANKET = 6,325 SY
4. CONCRETE WASHOUT =2
5. INLET PROTECTION = 43
°000000 PRE GRADING ROCK ENTRANCE BERM
-------- POST GRADING SILT FENCE
-------- PRE GRADING SILT FENCE
POST GRADING CONCRETE WASHOUT
POST GRADING INLET PROTECTION
POST GRADING EROSION BLANKET
RILEY PURGATORY BLUFF CREEK WATER SHED DISTRICT EROSION CONTROL NOTES:
a. Natural topography and soil conditions must be protected, including retention onsite of
native topsoil to the greatest extent possible.
b. Construction should include minimization of the disturbance intensity and duration,
including phasing of disturbance to minimize quantity of disturbed area at any one time.
c. Additional measures, such as hydraulic mulching and other practices as specified by the
District must be used on slopes of 3:1 (H:V) or steeper to provide adequate stabilization.
d. Final site stabilization measures must specify that at least six inches of topsoil or organic
matter be spread and incorporated into the underlying soil during final site treatment
wherever topsoil has been removed.
e. Soil Surfaces compacted during construction and remaining pervious areas upon
completion of construction must be decompacted to achieve:
1. a soil compaction testing pressure of less than 1,400 kilopascals, or200 pounds per
square inch in the upper 12 inches of soil or,
ii. a bulk density of less than 1.4 grams per cubic centimeter of 87 pounds per cubic
foot in the upper 12 inches of soil.
f. Construction site waste such as discarded building materials, concrete truck washout,
chemicals, litter and sanitary waste must be properly managed.
g. All temporary erosion and sediment control BMPs must be maintained until completion of
construction and vegetation is established sufficiently to ensure stability of the site, as
determined by the District.
h. All temporary erosion and sediment control BMPs must be removed upon final
stabilization.
I. Soil surfaces compacted during construction and remaining pervious upon completion of
construction must be decempacted through soil amendment and/or ripping to a depth of
18 inches (8 inches for single-family home properties)while taking care to avoid utilities,
tree roots and other existing vegetation prior to final revegetation orother stabilization.
(builder. 20' in the front yard, side yards (where possible), and 25' benind the home site)
j. All disturbed areas must be stabilized within 7 calendardays after land -disturbing work
has temporarily or permanently ceased on a property that drains to an impaired water,
within 14 days elsewhere.
k. The permittee must, at a minimum, inspect, maintain and repair all disturbed surfaces and
all erosion and sediment control facilities and soil stabilization measures every day work is
performed on the site and at least weekly until land -disturbing activity has ceased.
Thereafter, the permittee must perform these responsibilities at least weekly until
vegetative cover is established. The permittee will maintain a log of activities under this
section for inspection by the District on request.
Activities must be conducted so as to minimize the potential transfer of aquatic invasive species (e.g.,
zebra mussels, Eurasian watermilfoil, etc.) to the maximum extent possible.
DENOTES DRAINAGE DIRECTION
Developer Contact Information
Chan Three Development, Inc,
10850 Old County Road 15
Suite 200
Plymouth, MN 55441
Craig Allen
cell: 952-270-4473
email: craig@gonyeacompany.com
DRAWING NAME NO.
BY DATE
I REVISIONS
USE (INCLUDING COPYING, DISTRIBUTION, AND/OR CONVEYANCE OF
INFORMATION) OF THIS PRODUCT IS STRICTLY PROHIBITED WITHOUT
SATHRE-BERGQUIST, INC.'s EXPRESS WRITTEN AUTHORIZATION. USEWITHOUT
SAID AUTHORIZATION CONSTITUTES AN ILLEGITIMATE USE AND SHALL THEREBY
INDEMNIFYSATHRE-BERGQUISE INC. OFA LLRESPONSIBILITY.
USERSATHRE-BERGQUIST, INC. RESERVES THE RIGHT TO HOLD ANY ILLEGITIMATE
USER OR PARTY LEGALLY RESPONSIBLE FOR DAMAGES OR LOSSES RESULTING
FROMILLEGITMATEUSE.
I HEREBY CERTIFY THAT THIS PLAN OR SPECIFICATION WAS
PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT 1
AMA DULY REGISTERED PROFESSIONAL ENGINEER UNDER THE
LAWS OF THE STATE OF MINNESOTA.
,_—
S/�/.��j
ERs soR`�
w SATHRE-BERGQUIST INC.ERJ
,,, 150 SOUTH BROADWAY WAYZATA,MN. 55391 (952)47&-6000CHECKEDBY
'�DATE
�.yfdCHAN
Rs vv
CITY PROJECT NO.
EROSION CONTROL PLAN
THE E�LUFFS AT LANCE LUCY
THREE DEVELOPMENT, INC.
sheets Erosion 03
_MJ_V 09/0_4/2_0
MJV 09/16/20
MJV 09/23/20
MJV 10/OSM20
MJV10/07/20
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MJV 10/09M20
_ _ _ _ _ CITY COMMENTS _
CITY COMMENTS
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CIN&Ri— -COMMENTS
RPBCWDCOMMENTS
_ _ _ CITV 8,MCECOMMENS _ _ —
RPBCWDCOMMENTS
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CITU COMMENTS
2020-12
DRAWNBY 04
CHANHASSEN,
MINNESOTA
O5
J3120-O79
O6MJV09/29/20_CIN&
RSM 07
08
ROBERTS.M LSTAD,P.E.
Date: 07 08 ZO Lic. No. ZPI-1�L8
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07/OSY20 09