HomeMy WebLinkAboutLot Certifications - 05/29/2024 (2)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:
l Top of foundation/finished floor
l Finished grade on each side of the structure
l Quarter points along each lot line (not more than 50 feet apart)
l Break points/high points
l Swales
l Berms
l Retaining walls
l Air conditioning pads
l Window wells
l 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
NR
NR
NR
NR
NR
NR
NR
NR
See attached memo.
5/21/2024 Northfield Commons
831 Mangold Lane B2207759
9701462003
Units 1-5 BLDG 13a (Tract C)20220021823
Nick Reuter
5/16/2024
Grading/Stormwater Certification Accepted
(Certificate of Occupancy Released)
Accepted by:
Date:
☐ Escrow was held for CO and is now released
we Dan Mogen
05/29/2024
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
NR
NR
NR
NR
NR
5/29/2024
Landmark Homes
Nick Reuter
nick@inspire-eng.com
319-631-5935
INSPIRE Engineering, LLC.
4803 Innovation Dr., Suite 4
Fort Collins, CO
COMPACT COMPACT COMPACT COMPACT COMPACT COMPACT COMPACT COMPACT COMPACT
COMPACT COMPACT COMPACT COMPACT COMPACT COMPACT COMPACT COMPACT COMPACT
COMPACT COMPACT COMPACT COMPACT COMPACT COMPACT COMPACT COMPACT COMPACT
SUNIGA ROAD
(115' ROW)
ROCKY MOUNTAIN
RAPTOR PROGRAM
LAKE CANAL
MATCHLINE
SEE THIS SHEET
STEELEY DRIVE
BLDG 1
COMMUNITY
CENTER
BLDG 2
BLDG 3BLDG 4
BLDG 5
MANGOLD LANE
COMPACT
COMPACT
COMPACT
COMPACT
COMPACT
COMPACT
COMPACT COMPACT COMPACT COMPACTCOMPACT COMPACT COMPACT COMPACT COMPACT
COMPACT COMPACTCOMPACTCOMPACT
COMPACT
COMPACT
COMPACT
COMPACT
COMPACT
SUNIGA ROAD
(115' ROW)
LANDMARK WAY
MARTINEZ STREETSWARTZ, DAVID A,
MILCAN, SUSAN MARIE
LOT 29
MONDRAGON, LUCY
V / CHRISTINA M,
LOT 28
ROCKY MOUNTAIN
RAPTOR PROGRAM
MATCHLINE
SEE THIS SHEET
STEELEY DRIVE
BLDG 6 BLDG 7
BLDG 10a
BLDG 11a BLDG 13a
BLDG 12a
MANGOLD LANE
RE
V
I
S
I
O
N
NO
.
BY
DA
T
E
PH
O
N
E
:
9
7
0
.
6
7
4
.
7
5
5
0
|
E
M
A
I
L
:
I
n
f
o
@
H
i
g
h
l
a
n
d
-
D
S
.
c
o
m
|
w
w
w
.
H
i
g
h
l
a
n
d
-
D
S
.
c
o
m
PREPARED BY OR UNDER THE
DIRECT SUPERVISION OF:
FOR AND ON BEHALF OF HIGHLAND
DEVELOPMENT SERVICES
OFSHEET
DRAWN BY
CHECKED BY
DATE
SCALE (H)
HDS PROJECT
SCALE (V)
NO
R
T
H
F
I
E
L
D
C
O
M
M
O
N
S
DE
T
A
I
L
E
D
G
R
A
D
I
N
G
P
L
A
N
3/15/22
1" = 40'
N/A
ACB1
JTC
21-1037-00
C2.01
6 17
N
W E
S0
SCALE: 1" = 40'
80402040
CALL UTILITY NOTIFICATION
CENTER OF COLORADO
CALL 2-BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
Know what's
R
LEGEND
EXISTING MAJOR CONTOUR
EXISTING MINOR CONTOUR
PROPOSED MAJOR CONTOUR
PROPOSED MINOR CONTOUR
NOTES
1.CONTRACTOR TO PROVIDE AND MAINTAIN ALL NECESSARY EROSION CONTROL
MEASURES PRIOR TO AND THROUGHOUT CONSTRUCTION.
2.SPOT ELEVATIONS SHOWN ARE ON FLOWLINE OR BACK OF WALK UNLESS
OTHERWISE LABELED.
3.WALKWAYS SLOPE 2.0% AWAY FROM BUILDINGS AND/OR TOWARD
PARKING/DRIVE AREAS. WALK LABELS ARE SHOWN ON THE HIGH SIDE OF THE
WALK.
4.ALL SUBGRADE TO BE PLACED/COMPACTED PER GEOTECHNICAL ENGINEER
RECOMMENDATIONS.
5.THE TOP OF FOUNDATION ELEVATIONS SHOWN ARE THE MINIMUM ELEVATIONS
REQUIRED FOR PROTECTION FROM THE 100 YEAR STORM. THE LOWEST OPENING
ELEVATIONS SHOWN ARE AT LEAST ONE FOOT ABOVE THE 100 YEAR STORM
ELEVATION OF ADJACENT STREETS, CHANNELS, DITCHES, SWALES, OR OTHER
DRAINAGE FACILITIES.
6.THE NATURAL HABITAT BUFFER ZONE IS INTENDED TO BE MAINTAINED IN A NATIVE
LANDSCAPE. PLEASE SEE SECTION 3.4.1 OF THE LAND USE CODE FOR ALLOWABLE
USES WITHIN THE NATURAL HABITAT BUFFER ZONE.
PROPOSED NORTHFIELD
MAJOR CONTOUR
PROPOSED NORTHFIELD MINOR
CONTOUR
NATURAL HABITAT BUFFER ZONE
DocuSign Envelope ID: A83F8692-0FEA-4A4E-940F-BC34098A719A
MA
N
G
O
L
D
L
A
N
E
831 MANGOLD
BLDG 13a
0
SCALE: 1" = 20'
2010
PLOT PLAN
FOR LANDMARK HOMES
PARCEL DESCRIPTION: BLDG 13a, NORTHFIELD COMMONS, CITY OF FORT
COLLINS, COUNTY OF LARIMER, STATE OF COLORADO
PHONE: 970.674.7550 | EMAIL: Info@Highland-DS.com | www.Highland-DS.com
DRAWN BYDATE
SCALE (H)HDS PROJ
OFSHEET
NORTHFIELD
831 MANGOLD LANE
UNITS 1-5
9/7/2022
1" = 20'
PHS
18-1000-03
PLOT PLAN
1 1
NOTE:
1.PROVIDE A MINIMUM OF 10% GRADE AWAY FROM FOUNDATIONS AND
WINDOW WELLS FOR THE FIRST 5 TO 10 FEET, UNLESS AT BUILDING ENTRIES OR
OTHERWISE NOTED.
2.THE FINISHED GRADE (FG) ADJACENT TO BUILDING FOUNDATION IS A MINIMUM 6
INCHES BELOW THE TOP OF FOUNDATION (TF).
3.TOP OF FOUNDATION (TF) ELEVATION IS EQUAL TO TOP OF SLAB (TOS)
ELEVATION.
4.MINIMUM SLOPES ON THE LOT SHALL NOT BE LESS THAN 2% GRADE.
5.DRIVEWAY SLOPES ARE A MINIMUM OF 2% AND A MAXIMUM OF 10%, UNLESS
OTHERWISE APPROVED.
5.DRIVEWAY SLOPES & STAIR HEIGHTS/COUNTS SHOWN ARE ESTIMATED AND TO BE
VERIFIED IN THE FIELD.
ABBREVIATIONS
A&EAE ACCESS & EMERGENCY
ACCESS EASEMENT
D&UE DRAINAGE & UTILITY
EASEMENT
SW SIDEWALK
EE EASEMENT EXCLUSION
FG FINISHED GRADE
TOS TOP OF SLAB
UE UTILITY EASEMENT
RISER
HEIGHT (IN)NO. OF
RISERS
STEP NOTATION
MEMO
831 Mangold Lane, Fort Collins Page 1
ENG23.0114-013
To: Landmark Homes
From: INSPIRE Engineering LLC
Date: 5/21/2024
Subject: 831 Mangold Lane, Fort Collins
Some sections of the concrete pan swale are below the designed .5% slope. This slope is difficult to achieve in
practicality and especially over approximately 150’ of swale. The measured slope from the beginning to the end of the
concrete pan is approximately .45%, rounded up to .5%. So, while sections fall short of this mark, the overall swale
slopes as intended.
There is a stretch of concrete pan that is essentially flat and another area where the PVC culvert invert elevation is lower
than the downstream. This could cause some minor backflow and ponding, but since we are working with minimal slope
on the pan, it won’t take much to keep the water flowing as intended. During recent rain events, minimal ponding was
observed, and the swale directed water as intended.
It should also be noted that the concrete pan is located 15’ to 20’ away from the main foundation of the building and is
approximately 3.5’ to 4’ below the top of the foundation. This means that the swale is located at or near the footing
elevation, so ponding and backflow pose a minimal risk to the foundation elements of the building.
The risks associated with the reduced pan slopes and potential backflow concerns have been discussed with and
accepted by Landmark Homes.
Sincerely,
INSPIRE Engineering LLC
Nick Reuter, PE
Owner, Principal Engineer