HomeMy WebLinkAboutLot Certifications - 12/11/2020 (4)2/14/17 Page 1
CERTIFICATION OF LOT GRADING
Pursuant to Fort Collins City Code § 26-544 & City Land Use Code § 3.3.2 (e)
Date:
Address:
Lot: Block:
Subdivision:
Permit Application #:
Larimer County Parcel #:
Larimer County Reception #:
(on development agreement)
I, (print) , a Colorado registered professional engineer, verify that construction
of all stormwater facilities and grading is complete and hereby submit this certification.
Please answer the following questions by initialing the appropriate response. For each question initialed “No,” attach an
explanation detailing how this will affect stormwater drainage for this lot and any adjacent lots.
1.Certification includes attached Stormwater-approved grading plan. (NOTE: City’s
Building Department does not approve grading plans).
2.Certification includes the attached as-built survey dated (must be within 60
days of the date the certification is submitted) accurately and truthfully depicting
elevations for:
Top of foundation/finished floor
Finished grade on each side of the structure
Quarter points along each lot line (not more than 50 feet apart)
Break points/high points
Swales
Berms
Retaining walls
Air conditioning pads
Window wells
Any other appurtenance(s) within an easement
3.All elevations are within a 0.2 foot tolerance of the approved grading plan.
4.The top of foundation is at least 6 inches above the highest grade surrounding the
structure.
5.There is a minimum grade of 5% away from the structure within the first 5 to 10 feet
adjacent to the residence.
6.All slopes meet or exceed the minimum requirement of 2% (1% is acceptable on single
family lots when the swale is draining the runoff from only two adjoining properties)
and are not steeper than 33% (3:1).
7.All flow lines of stormwater drainage swales are a minimum of 6 inches below the
elevation of ground adjacent to the structure and will direct drainage as shown on the
Stormwater-approved grading plan.
8.All downspout locations and discharge directions are shown on the as-built survey.
Runoff is directed into an appropriate drainage system or lot line swale, and it is not
directed onto neighboring properties.
No Yes
No Yes
No Yes
No Yes
No Yes
No Yes
No Yes
No Yes
X
X
X
X
X
X
X
X
2/14/17 Page 2
9.A smooth transition with no vertical offset (step) in grade is provided at the lot line to all
adjacent properties.
10.The grading of this lot does not adversely affect neighboring properties or City
infrastructure.
11.Landscaping has been completed prior to survey. If not, please indicate who will be
responsible for completing landscaping:
12.Final site cleanup has been completed.
13.I personally visited the site as part of the certification process, and in my professional
opinion, the as-built survey is an accurate representation of the site conditions..
No Yes
No Yes
No Yes
No Yes
No Yes
14.Based on this information, I certify that (check one):
□The elevations and drainage patterns of the lot/site are in substantial conformance with the City
approved drainage and grading plan for the property (information attached).
□The elevations and drainage patterns of the lot/site as measured are in general conformance with the
City approved drainage plan with exceptions (information attached). In my professional judgment the
elevations and grading of the lot/site as constructed are functionally adequate and equivalent to the
specifically approved drainage plan, and will affect stormwater drainage on and off the lot/site in a
manner consistent with the approved drainage plan.
Name:
Email:
Phone:
Company:
Address:
NOTE: A complete certification must be submitted at least two weeks prior to a request for a Certificate of Occupancy
for the lot/site, including, but not limited to, drawings of the lot/site showing the approved design and as-built surveyed
elevations of all structures, drainage and grading features, written information/explanation of discrepancies, and other
information necessary to confirm the above certification to:
Email (preferred)
WaterUtilitiesEng@fcgov.com
Mailing Address
Fort Collins Utilities
ATTN: Water Utilities Engineering
281 North College Avenue
Fort Collins, CO 80521
Questions?
970-221-6700
PE Stamp
Sign and date
X
X
X
X
X
12/4/2020
December 4, 2020
Mr. Dan Mogen
City of Fort Collins Utilities
281 N. College Avenue
Fort Collins, CO 80521
RE: Mountain’s Edge – Block 1 - Certification of Lot Grading
Dear Mr. Mogen,
Please find the attached Certification of Lot Grading for Block 1, Mountain’s Edge (Address: 2445
Ridge Top Drive).
This letter is provided to document the deviations from the approved grading plans.
The following items are deviations from the approved grading plans:
1. The spill curb and gutter on Ridge Top Drive was built approximately 0.3’ high. This is
not an issue since the private drive is superelevated. Drainage will function as intended.
2. The garage pads were designed to be 8” below the top of foundation. It was expected that
there would be a step from the garage into the units. At construction, these pads were
poured to be ADA accessible into the unit. As such, these pads were poured higher than
planned. The driveway was adjusted to match the garage pad and the flowline. As the
curb and gutter was installed high the driveway grade is similar to what was proposed
with the original grading plans. There is no concern here.
The grading around the building meets code. The grading and drainage improvements around
the building meet the intention of the original plans and design.
Please do not hesitate to contact me at 970.568.5412 or stephanie@northernengineering.com.
Sincerely,
Northern Engineering Services, Inc.
Stephanie Thomas
Project Manager
Page 2
Attachments:
As-Built Elevations for Drainage Certificate – Lots 1-7, Block 1, Mountain’s Edge
Approved Mountains Edge Grading Plans
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H2O
TSALPOLYN
DUCTILEIRON
TSALPOLYN
DUCTILEIRON
TSALPOLYN
DUCTILEIRON
TSALPOLYN
DUCTILEIRON
TSALPOLYN
DUCTILEIRON
TSALPOLYN
DUCTILEIRON
TSALPOLYN
DUCTILEIRON
TSALPOLYN
DUCTILEIRON
TSALPOLYN
DUCTILEIRON
TSALPOLYN
DUCTILEIRON
OWNER: CITY OF
FORT COLLINS
2' DRAINAGE PAN
EXISTING STORM
DRAIN TO BE PLUGGED
AND FLOW-FILLED
57.5' HALF ROW
7.5' ADDITIONAL ROW TO BE DEDICATED
15' UTILITY EASEMENT
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OV
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8' UTILITY
EASEMENT
8' UTILITY
EASEMENT
8' UTILITY
EASEMENT
LANDSCAPE RETAINING
WALL 2.5' MAX HEIGHT
LANDSCAPE RETAINING
WALL 2.5' MAX HEIGHT
2' DRAINAGE PAN
9:1
8:1 25.0%
2.
2
%
21
.
7
%
15
.
5
%
5:1
12
.
4
%
23
.
2
%
10
.
8
%
1.5%
4.
2
%
1.5%
7:
1
8.
9
%
21:1
PROPOSED 2'
SIDEWALK
CHASE (TYP.)
PROPOSED 2'
SIDEWALK
CHASE (TYP.)
STEPS
STEPS
20'
FL-FL
20
'
E
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20
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M
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N
C
Y
AC
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A
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T
BUILDING
1
BUILDING
2
BUILDING
3
BUILDING
4
BUILDING
6
BUILDING
15
BUILDING
17
LOT 3
LOT 2
LOT 5
LOT 4
LOT 1
LOT 2
LOT 3
LOT 1
LOT 2
LOT 3
LOT 6
LOT 5
LOT 7
LOT 4
LOT 4
LOT 3
LOT 1
LOT 3
LOT 4
LOT 3
LOT 4
LOT 3
LOT 2
LOT 5
LOT 4
LOT 1
LOT 2
LOT 1
LOT 2
LOT 3
LOT 6
LOT 5
LOT 7
LOT 5
LOT 4
LOT 2
LOT 1
LOT 2
TRACT A
UE, DE
4:1
9:1
INLINE DRAIN 10-3A
BASIN 10-1
FES 10
DRAIN BASIN 10-3B
DRAIN BASIN 10-2
DRAIN BASIN 10-4B
DRAIN BASIN 10-4C
LD INLINE DRAIN 10-5C
STORM DRAIN LINE 10-1
SEE SHEET ST8
INLINE DRAIN 12-3
ST 22.5° BEND 12-2
FES 12
DRAIN BASIN 12-2A
STORM DRAIN LINE 12
SEE SHEET ST8
LD BASIN 3-2
LD BASIN 3-1
CONCRETE COLLAR 3
LD INLINE DRAIN 4-3
LD BASIN 4-2
LD BASIN 4-1
CONCRETE COLLAR 4
INLET 4-1
TF=49.04
TF=49.04
TF=49.04
TF=52.09
TF=52.09
TF=52.09
TF=52.09
TF=52.09
TF=52.97
TF=52.97
TF=52.97
TF=52.97
TF=52.97
TF=52.97
TF=51.76
TF=51.76
TF=51.76
TF=51.76
TF=51.09
TF=51.09
TF=51.09
TF=51.09
TF=51.09
TF=50.71
TF=50.71
TF=50.71
TF=50.71
TF=50.11
TF=50.11
TF=50.11
TF=48.86
TF=48.86
TF=48.86
TF=48.8650.0
450.5
9
50.7
1
50.59
50.49
50.9
1
50.04
50.6750.49
50.9
2
50.0
4
51.0
9
51.64
51.5
1
52.24 51.0
9
51.6
0
51.5
152.24
51.09
51.6051.51
51.6
5
51.0
9
51.6
451.51
51.6
9
51.0
9
51.0
9
51.0
9
50.3
4
49.27
52.3
0
52.8452.7254.28
52.30
52.91
52.8
0
53.02
52.30
52.93
52.8
4
52.97
52.30
52.30
52.7952.97
52.93
52.8
4
52.95
52.91
52.91
52.9
8
52.7
9
52.3
0
51.4
2
51.9
7
51.05
51.4
2
51.4
2
51.05
51.9
6
51.5
9
51.66
51.9
6
51.5
9
51.66
51.9
5
51.66
51.9
5
51.5
9
50.4
2
50.25
50.9
5
50.4
2
50.25
51.0
2
50.25
51.0
2
50.4
2
50.04
51.05
50.4
2
49.92
50.9
7
50.4
250.4
2
50.4
2
49.4
4 49.4
4
49.9
9
48.83
49.6
1
49.9
5
48.83
49.6
1
48.35
48.3
5
BUILDING
5
49.3
9
49.60
0.
5
%
0.
5
%
49.6
7
0.
5
%
49.2
7
48.2
3
49.37
49.79
49.8
2
50.57
49.98
0.
9
%
6.
8
%
0.
5
%
0.
5
%
2.
0
%
50.29
50.5
2
50.50
50.44
0.
5
%
0.
5
%50.47
50.50
50.6
0
54.36
TOW
2.
4
%
0.
4
%
0.
5
%
0.
5
%
0.
5
%
51.29
52.7
9
52.79
51.35
51.45
51.39
51.31
51
.
2
9
51.20
51.18
50.73
51.47
4:1
48.4
3
47.6
3
47.8
7
49.7
9
49.7
9
46.0
0
49.4
0
50.7
8
46.00
50.6
9
47.9
2
47.69
45.3
5
48.33
48.3
3
48.3
7
46.7
2
46.50
2.5
%
1.
4
%
50.8
8
47.1
8
47.9
1
48.3
3
45.79
46.90
45.69
46.34
46.71
46.95
46.97
46
.
9
9
6:1
5:1
5:1
6:1
5:1
4:1
4:1
4:1
4:1
9:1
0.
3
%
LANDSCAPE DRAIN LINE 3
SEE SHEET ST10
LANDSCAPE DRAIN LINE 4
SEE SHEET ST10
46.1
0
45.0
1
45.30
44.3
7
47.4
0
47.2
1
47.4
8
47.80
47.74
47
.
5
6
47.2
7
47
.
5
1
47
.
6
247.7
6
48.44
48.6
448.8
8
49.1
9
48.2
5
48.5
9
48.9
6
5.9%
7.2%1.6%
1.5%
49.89
48.0
0
FG
50.50
TOP
48.2
1
FG
50.59
TOW
48.2
1
FG
50.59
TOP
49.99
TOP
48.6
8
FG
48.95
TOP
49.99
TOP
50.2
7
50.30
49.8
8
50.0
2
49.7
7
47.8
4 47.4
9
1.6%
48.9
0
49.5
5
1.7%
48.45
48.92
8.0%
8.0%
5.5%
5.1%
3.5%
8.1%
7.5%
2.3%
2.6%
2.9%
3.9%
3.3%
5.1%
5.0%
49.8
9
50.8
2
2.3%
1.7%
7.7%
8.4%
49.2
2
51.0
3
50.4
8
3.9%
8.7%
49.3
3
50.6
7
50.7
0
51.33
51.31
49.9
7
43.78
44.04
DRAIN BASIN 10-3
47.5
0
47.5
0
47.21
47.41
47.21
53
.
2
0
53.1
5
54.15
54
.
2
0
54.
3
8
FG
53.27
FG
52.03
54.44
54.23
52.90
FG
54.45
52.12
54.5
9TOW
52.42
TOW
51.60
TOW
52.35
TOW
54.78
TOW
52.32
54.65
52.58
FG
52.58
FG
51.1554.65
52.
5
6
FG
52.49
FG
50.91
54.54
54.64
TOW
52.12
TOW
50.3
9
50.0
5
51.66
51.6
6
51.57
51.34 50.97
7.5%
3.0%
4.5%
49.6
5
1.
0
%
0.
6
%
0.
6
%
5.9%
3.4%
6.3%
5.2%
4.1%
2.8%
3.3%
4.8%
6.7%
7.7%
6.7%
5.7%
4.8%
4.0%
1.4%
2.0%
2.4%
3.0%
3.5%
2.6%
8.2%
2.6%
3.1%
4.4%
KEYMAP
Sheet
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36
DateCity Engineer
Date
Date
Date
Date
Stormwater Utility
Parks & Recreation
Traffic Engineer
Date
Water Utility
City of Fort Collins, Colorado
UTILITY PLAN APPROVAL
Environmental Planner
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
before you dig.Call
R
( IN FEET )
0
1 INCH = 30 FEET
30 30 60 90
G1
G4
G2
G3
G5 G6
G8G7
LEGEND:
PROPOSED CONTOUR
EXISTING STORM SEWER
PROPOSED STORM SEWER
PROPOSED SWALE
EXISTING CONTOUR
PROPOSED CURB AND GUTTER
PROPERTY BOUNDARY
PROPOSED SPOT ELEVATION
PROPOSED SLOPES
1.THE SIZE, TYPE AND LOCATION OF ALL KNOWN UNDERGROUND UTILITIES ARE
APPROXIMATE WHEN SHOWN ON THESE DRAWINGS. IT SHALL BE THE
RESPONSIBILITY OF THE CONTRACTOR TO VERIFY THE EXISTENCE OF ALL
UNDERGROUND UTILITIES IN THE AREA OF THE WORK. BEFORE COMMENCING NEW
CONSTRUCTION, THE CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING ALL
UNDERGROUND UTILITIES AND SHALL BE RESPONSIBLE FOR FOR ALL UNKNOWN
UNDERGROUND UTILITIES.
2.REFER TO THE PLAT FOR LOT AREAS, TRACT SIZES, EASEMENTS, LOT DIMENSIONS,
UTILITY EASEMENTS, OTHER EASEMENTS, AND OTHER SURVEY INFORMATION.
3.ALL PROJECT DATA IS ON THE CITY OF FORT COLLINS VERTICAL DATUM; NAVD88.
SEE COVER SHEET FOR BENCHMARK REFERENCE.
4.THE TOP OF FOUNDATION ELEVATIONS SHOWN ARE THE MINIMUM ELEVATIONS
REQUIRED FOR PROTECTION FROM THE 100-YR STORM.
5.PLEASE REFER TO THE EROSION CONTROL PLAN SHEETS AND REPORT FOR
TEMPORARY CONTROL MEASURES AND CONSTRUCTION SEQUENCING THAT SHALL
BE USED TO PREVENT LOADING OF RAIN GARDENS WITH SEDIMENT DURING
CONSTRUCTION.
6.PLEASE SEE SECTION 3.4.1 OF THE LAND USE CODE FOR ALLOWABLE USES WITHIN
THE NATURAL HABITAT BUFFER ZONE.
7.THE NATURAL HABITAT BUFFER ZONE IS MEANT TO BE MAINTAINED IN A NATIVE
LANDSCAPE.
8.ABBREVIATIONS:
FG = FINISHED GRADE HP = HIGH POINT
TOW = TOP OF WALL BOW = FINISHED GRADE AT BOTTOM OF WALL
NOTES:
PROPOSED STORM INLET
PEDESTRIAN ACCESS RAMPS
EXISTING SPOT ELEVATION
PROPOSED FIRE HYDRANT
PROPOSED LOT LINE
PROPOSED CONCRETE
CROSS PAN (TYP.)
EXISTING RIGHT OF WAY
PROPOSED RIGHT OF WAY
PROPOSED SLOPES
Detention Pond Summary | Proposed Condition
Pond 100-yr Volume
(ac-ft)
100-yr WSEL WQCV
(ft3)
WQCV
WSEL
Max
Release
(cfs)
1 1.47 5145.38 3,251 5141.81 0.45
2 1.09 5140.12 2,987 5137.87 0.50
3 0.14 5145.67 296 5143.01 0.10
4 1.07 5142.15 970 5136.45 1.40
MATCHLINE-SEE SHEET G5
MA
T
C
H
L
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E
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S
E
E
S
H
E
E
T
G4
MATCHLINE-SEE SHEET G1