HomeMy WebLinkAboutLot Certifications - 11/14/20242/14/17 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
11/13/2024 Evergreen Park Replat
1314 Red Cedar Circle B0603001
Fort Collins, CO 80524 9701214003 and 9701214002
2 and 3 4
Stephanie Thomas, PE
10/28/2024
ST
An approved detailed grading plan for this structure was not found in the City' archives. Attached is a site plan indicating the proposed
finished floor elevation of the structure (1999/2004) and the proposed grading of the lot, prior to the structure (1994).ST
Lot corners were not found.
Elevations of the fenceline nearest
the lot corner were provided
The residential portion of the structure is generally 11" or more above adjacent grade. The garage slab is generally flush with
adjacent grade. The storage building is generally 5" or more above adjacent grade.
Vast majority of the lot shows slopes greater than 1%. Localized areas of the yards on the west and east sides of the
structure have a overall minimum gradient between 0.3% and 0.5%.
The attached site plan (1994) provided overall grading contours and limited grade spots. Much of the lot grading has changed overtime including
the addition of this structure. Review of the provided survey as it compares to these plans is difficult to achieve with the requested accuracy.
ST
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Grading/Stormwater Certification Accepted
(Certificate of Occupancy Released)
Accepted by:
Date:
☐ Escrow was held for CO and is now released
we Dan Mogen
11/14/2024
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
4
Stephanie Thomas
Stephanie.Thomas@epsgroupinc.com
970-568-5412
EPS Group Inc.
301 N. Howes Street Suite 100
Fort Collins, CO 80521
Please see attached letter and analysis for additional information.
11/13/2024
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ST
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EPSGROUPINC.COM | 970.221.4158
FORT COLLINS | GREELEY | MESA | TUCSON | GOODYEAR | PHOENIX | FORT WORTH 1 | 4
November 5, 2024
Mr. Dan Mogen
City of Fort Collins
Stormwater Department
700 Wood Street
Fort Collins, CO 80521
RE: LOT CERTIFICATON MEMORANDUM
1314 RED CEDAR CIRCLE – LOTS 2 AND 3, BLOCK 4 EVERGREEN PARK REPLAT
BUILDING PERMIT APPLICATION #:B0603001
LARIMER COUNTY PARCEL #: 9701214003 AND 9701214002
EPS PROJECT NUMBER: 24-0685
Dear Mr. Mogen,
Please find the memorandum for the Certification of Lot Grading for the residential structure built at 1314 Red
Cedar Circle, Fort Collins, CO.
This letter is provided to document the drainage patterns found at the Site, the original plans and the original
certifications found during research, and grading improvements conducted around the structure in preparation
for this certification.
The grading certification of this structure is unique because the original design of the site was completed by
Stewart and Associates during the timeframe of 1992-1994 and the house was built around 2004-2005. A
Certificate of Occupancy was not completed at that time for unknown reasons.
Provided below is a timeline of the project gathered from documents/correspondence/notes provided by the
City, the City’s database or the owner. I am providing this timeline to provide context surrounding our review of
the current grading and drainage patterns surrounding the structure.
Timeline of Site Development and Building Construction:
1. 1992 – Lot 3, Block 4 by Stewart and Associates
a. Design provided for construction of Boat Storage Structure and Security Guard House on
property
b. Detailed Grading around Security Guard House
2. 1994 – Lot3 & 4 Block 4 by Stewart and Associates
a. Design provided for construction of additional Boat Storage Structure on east side of property
b. Detailed Grading updates around Security Guard House
3. 1999 – The Toy Shed Site Plan by Steward and Associates
a. Design provided site plan for the replacement of existing Security Guard House with New
House and Garage.
b. Provided Building envelope of new house and Fin. Floor Elevation. Presumably finished floor
elevation was based on the RFPE for the Dry Creek Floodplain at that time.
EPSGROUPINC.COM | 970.221.4158
FORT COLLINS | GREELEY | MESA | TUCSON | GOODYEAR | PHOENIX | FORT WORTH 2 | 4
c. Approved Plans from 1999 reissued in 2004 with Building Plans
4. December 2004 – Building Plans for New House and Garage by CRM Architects
a. Approved Site Plan for The Toy Shed reissued with building plans
b. Building Plans detail elevated structure and vetting details for enclosed crawl space per
floodplain requirements. Comment: It is unclear why these were required at that time, as the
property had been remapped out of the floodplain at that time (per recent City of Fort Collins
correspondence).
c. Floodplain Use Permit and No-Rise Certification provided by Northern Engineering
5. 1/2005 - C.O. Hold - City Staff statement: Need grading certification to include any swales, finished floor
elevation, lot corner elevation and lowest building opening elevations. Per Jay Barber 416-2241.
6. 2007 - Certification of Building Elevation and Venting Elevations provided by Stewart and Associates
7. September 2024 – Request for Certificate of Occupancy from current owner for sale of the property
Intent of Certification
I was unable to review the survey against the approved site plan (1994) with the required accuracy. The site plan
from 1994 contained overall grading contours and minimal design spots. Additionally, the site grading has
changed over time with the addition of this structure, decks, and general landscaping. As such, I was unable to
certify to the approved grading plan.
I reviewed the site’s lot grading based on the current Lot Grading Certification checklist. This review is meant to
provide an engineering analysis of the grading based on today’s standards. Due to the time that has elapsed
since the structure was built, some areas of the site are unable to meet the today’s grading standards without an
extensive regrading effort; as such, I am providing an engineering analysis of these areas and an opinion
regarding whether there is engineering concern.
This structure contains three uses. The residence is located at the south end of the structure, the garage is
located in the center of the structure, and storage units are located at the north end of the structure.
Grading Improvements Completed for Certification
This property historically was located within a floodplain. This floodplain has since been removed.
At the time the structure was built, the structure was required to have flood venting along the foundation. These
vents were located around the residential portion of the structure. The grading around the residence seemed to
have been affected by the floodplain restrictions at the time of design. The plans indicate flood vents were to be
placed at existing grade. It would seem the intent was to allow flood waters to pass through the building
unhindered, similar to stilts. These vents created areas of negative drainage towards the structure.
With the approval from the City of Fort Collins Floodplain department, these vents were closed up. The grade
adjacent to the building was raised to create positive drainage away from the building.
Additionally, a swale was graded to provide conveyance for the downspout on the northwest corner of the
adjacent building to the east.
EPSGROUPINC.COM | 970.221.4158
FORT COLLINS | GREELEY | MESA | TUCSON | GOODYEAR | PHOENIX | FORT WORTH 3 | 4
Specific Details
In review of the Lot Grading Survey provided by EPS Group on 10/28/2024, I provided an engineering analysis of
the grading and drainage patterns surrounding the structure. Areas of interest are marked on the attached
Engineering Analysis Map. These areas include localized flat slopes and drainage conveyances, and down spout
recommendations. These “Areas of Interest” have been labeled on the Engineering Analysis Map with a number
corresponding to the descriptions below:
Area of Interest 1 – This area is adjacent to the western side of the Residence. This area was greatly
improved with the previously described grading improvements. This area was previously observed to
have a negative drainage towards the structure. With the grading improvements, the grade away from
the building is between 17-21%. While the grading away from the building was greatly improved, the
yard adjacent to this area is still relatively flat. This area is shown to have an overall grade of 0.5% to
the south. While this is considered relatively flat, it has positive grade to the south and the foundation
of the residence is high compared to the area. I have no engineering concern in this area.
Area of Interest 2 - This area is adjacent to the south side of the Residence. This area was improved with
the previously described grading improvements. This area was previously observed to have a negative
drainage towards the structure. With the grading improvements, the grade away from the building is
between 1.7-8%. While 1.7% is considered flat adjacent to the building, it has positive grade to the
south and the foundation of the residence is high compared to the area. No downspouts were observed
discharging to this area. I have no engineering concern in this area.
Area of Interest 3 and 4 - This area is adjacent to the eastern side of the Residence. This area was greatly
improved with the previously described grading improvements. This area was previously observed to
have a negative drainage towards the residential structure. With the grading improvements, the grade
away from the building is between 9-13%. While the grading away from the building was greatly
improved, the yard adjacent to this area is still relatively flat. This area is shown to have an overall
grade of 0.3% to the north and south. While this is considered relatively flat, it has positive grade and
the foundation of the residence is high compared to the area. Currently, no rooflines discharge directly
to this area, but downspout exist adjacent to this area. As long as the downspouts are directed away
from this area, I have no engineering concern for the subject structure in this area.
o Recommendations: Due to the flat grades in this area, we recommend all downspouts adjacent
to this area be directed either north or south, away from this area.
Area of Interest 5 - This area is north of the storage unit portion of the structure. This area was observed
to have a flatter conveyance grades between 0.2-0.8%. These flatter conveyance grades were called out
in the site plans (1994) as an approved condition. This area is far from any structure. I have no
engineering concern.
Conclusion
I have reviewed the attached as-built survey and provided an engineering analysis of the existing drainage
patterns, as observed. I provided grading recommendations to the owner and the owner completed those
grading recommendations in preparation for this grading certification.
These grading improvements, while unable to satisfy all grading standards, provided a substantial improvement
in grading around the structure.
EPSGROUPINC.COM | 970.221.4158
FORT COLLINS | GREELEY | MESA | TUCSON | GOODYEAR | PHOENIX | FORT WORTH 4 | 4
I believe that the grading around the structure is sufficient to protect the structure from damage associated with
stormwater.
Please do not hesitate to contact me at 970.568.5412 or stephanie.thomas@epsgroupinc.com.
Sincerely,
EPS Group, Inc.
Stephanie Thomas, PE
Project Manager
Attachments:
As-Built Survey for 1314 Red Cedar Circle
Engineering Analysis Map
Found Documents/Correspondence/Notes for Original Design/Construction (Earliest to Latest)
1.
3
%
0.
5
%
3.8%
6.6%
1.7%
1.
2
%
3.
1
%
4.
5
%
2.
0
%
5.4%
1.
9
%
2.7%
5.
3
%
2.
6
%
9.8%
11
.
1
%
7.
1
%
7.
1
%
0.2%
0.3%
0.8%
1.1%
2" LIP ON
ORIFICE
PLATE
8.1%
5.1%
10.5%
7.6%
0.
8
%
3.
2
%
1.3
%
1.
6
%
1.
2
%
4.6
%
Engineering Analysis Notes:
1. TF Residence is more than 11"
above FG
2. Garage slab generally is flush with
FG
3. Storage Building Slab is generally
+/-0.4' above FG
4. Emergency Overflow Elevation is
based grading Site Plan (1994)
overflow elevation. This is the most
conservative assumption.
RESIDENCE
GARAGE
STORAGE
Assumed Location
of Emergency
Overflow
Location of detention pond
per Site Plan Design (1994).
Location of detention pond
(Observed)
LIMITS OF PONDING (APPROX.)
ENGINEERING ANALYSIS MAP
*MARKUP BY
STEPHANIE
THOMAS, PE
POND OVERTOPPING LOCATION
10
.
7
%
6.
7
%
1.
7
%
8.
7
%
13%
17%
21%
0.8
%
1.9%
3.
7
%
1.1%
13%
10%
0.
3
%
12%
11%
8.9%
0.
8
%
0.
9
%
0.
3
%
1
4
3
2
5
DOWNSPOUT DIRECTIONA
A
B C
DOWNSPOUT A
DOWNSPOUT B
DOWNSPOUT C
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TYPE INLET CAST IRON FROST PROOF VALVE
METER PIT COVER GENERAL
NOTES: 1.
This Motor pit not to be Installed
in any street, alley,
parking are&, driveway,
or sidewalk. 2.
NO landscaoing (trees, shrubs,
boulders, etc.) t
or retaining Mal is to be within
a feet of Meter pit. S.
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FLOW TYPE lid, at 2: grade. W
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be wade in Meter pit. eltuainous
COPPER 1 S. All tees and connections Fiber
PIPING to be a minimun of 5 feet SIMR
PIT from meter pit will on the
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that the Purer adjust
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a6 TO lE1/I`/tbTOtEui` Is Clev'red by luabing RAVCode, It shall N Installed inside
the building, 20.
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Permit # J J q t
F1oodAlain Use Permit (City of Fort Collins Code, Section 10-37)
Attach
applica12If
applicationLee of $_ .00. ffo/o dplain analysis required fee is $325.00) PETITIONER NAME: IIZ&
Ir 0,
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PHONE: 9-76 - g (Q(oZyL OWNER NAME: ie rCA
I c) 12A4 S SE 4 ADDRESS: I I C [
a C1t - PHONE: 8,0 CITY:! J
wl SSTATE: • ZIP: ODSZ LEGAL ADDRESS AND/OR
ADDRESS OF PROPERTY:/3 I a ItajGt- alp'Y . 1 DESCRIPTION OF THE PROPOSED PROJECT (CIRCLE
ONE . new residentia new commercial, accessory structure, fill, excavation, remodel -commercial, remodel -residential, other
IS STRUCTURE: Of ELEVATED FLOODPROOFED IF
FLOODPROOFED DESCRIBE METHOD TYPE OF
FOUNDATION (CIRCLE ONE): slab -
on -grade, basement, w pa enclosed area not subgrade, flings, other BENCHMARK USED: Y O ELEV'OF
BENCHMARK: U9 ` al . %1F M.S.L. LOWEST EXISTING GROUND ELEV: LI'l73•
IM.S.L. HIGHEST EXISTING GROUND ELEV: LOWEST FINISHED GROUND ELEV: Lg7.5 7
M.S.L. HIGHEST FINISHED GROUND ELEV: M.S.L. LOWEST FLOOR ELEV'(INCLUDING BASEMENT OR CRAWL
SPACE): cl • 7 .S M.S.L. ELEVATION OF GARAGE SLAB: 4117S. 75- M.
S.L. LOWEST ELEVATION OF HVAC EQUIP: 444-1 GS-M.S.L. Cs' n a sJt / ' o e '•. 9 /
p'L' O ENCLOSED AREA (not elevated orfloodproofed): /L
0-0 - NUMBER OF VENTS: AREA OF VENTING: /'i 9 ,PL— FLOODPLAINDESIGNATION: X FEMA—><—CITY FLOODPLAIN NAME: VC1
Cr4. FEMA BASE FLOOD ELEVATION (BFE): Lic 1
l ZONE (CIRCLE ONE): A, ®E AH, AO, X-500, X MASTER PLAN BFE: L4TT 3.1 ONE (CIRCLE
ONE) 100- , 500-YR, Shallow Flooding REGULATORY FLOOD ELEVATION (BFE+1.5') I-Iq
I S • % M.S.L. *FLOODWAY (Y/N): _ VARIANCE FROM CITY CODE: (Y/N): _ j (if
yes, -attach variance application with additional $300 variance fee) COST OF IMPROVEMENT FOR THIS PROJECT: Filk Submit
an itemized cost list of the improvements)
VALUE OF STRUCTURE: 14 A Submit an assessors
or appraisers valuation of the
structure) CUMULATIVE VALUE OF SUBSTANTIAL IMPROVEMENTS:_I_ SIGNATURE OF
PETITIONER:DATE SIGNATURE OF FLOODPLAIN USE
PERMIT: APPROVED: DENIED:. SIGNATURE
OF FLOODPLAIN
ADMINISTRATOR: "KANY( Iv DATE' COMMENTS:
Sty ^44acAcild ib&.c;(d lans_ Sce
al4achad sio-rose cerf-iF'ca-h'oe? If property is located in a floodway include
technical evaluation that demonstrates "no -rise" City Code 10-55. Variance application can be obtained from'Utilities., Variance
request requires consideration by Water Board. vQQ'/I(Qs
NORTHERN
ENGINEERINGNESERVICES, INC.
December 16, 2004
Ms. Marsha Hilmes-Robinson
Fort Collins Stormwater Utility
700 Wood St.
Ft.Collins, CO 80522
RE: Toy Shed Addition
No -Rise Certification
Dear Marsha:
As we have discussed by phone, Jerald Russel, the owner of Toy Shed, wishes to remove an existing
residential/office structure located within the Dry Creek floodway and replace it with a new
residential/office structure. Exhibit A (attached) shows the existing building, which will be removed,
and the new building to be constructed in its place. We note that any placement of fill adjacent to the
structure will mimic that of the existing building.
The direction of flow of the Dry Creek Floodplain through the site is, generally, from north to south.
As is shown on Exhibit A, the proposed building will be located in line with the existing building with
respect to the direction of flow. Exhibit B is provided to show dimensions of the existing and proposed
buildings. The existing 10'x10' shed, along with the existing carport and building, result in a 37.5-foot
obstruction to the Dry Creek Floodway. Per our discussions with you we have also added Exhibit C,
which shows a 1:1 shadow upstream of existing buildings, and a 4:1 shadow downstream of existing
buildings. We feel that due to the fact that the Dry Creek Floodplain is very shallow and has lower
velocities in the vicinity of Mr. Russel's property that there will be an insignificant effect on water
surface elevations within the Dry Creek Floodplain. We also note that Mr. Russel owns the adjoining
property to the north (upstream); thus any minor rise in the floodplain would be generally within Mr.
Russel's property.
Please feel free to contact me at 221-4158 ext. 106 if you have any questions concerning this.
Sincerely,
NORTHE ENGINEERING SERVICES, INC.
Aaron Cvar, P.E.
Senior Engineer
cc: Jerald Russel
420 SOUTH HOWES, SUITE 202 / FORT COLLINS, COLORADO 80521 / 970.221.4158 / FAX 970.221.4159
NO -RISE" CERTIFICATION
This is to certify that I am a duly qualified registered professional engineer li-
censed to practice in the State of C-OL-or-.aDo
It is further to certify that the attached technical data supports the fact that
proposed --or S#Ea (Name of Development) will not impact the 100-year flood
elevations, floodway elevations, or floodway widths on DRY Ge E.aic
Name of Stream) at published sections in the Flood Insurance Study for'
1A, (Name of Community) dated 44- CwrY. ,Fv od - rjror (Study Date)
and will not impact the 100-year flood elevations, floodway elevations, or flood -
way widths at unpublished cross -sections in the vicinity of the proposed -devel-
opment.
Attached are the following documents that support my findings:
L6TrSZ of 15xPLA-4A77,P/
51(*/f3i7-s .4 E- T5
Signature: L
Title: S Niv2 tn OW0999.,
Dat
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3627 a=
THE TOY SHED
1314 Red Cedar Cir.
Ft. Collins, Co.
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Legal Description : Block 4 Lots 1 & 2
Replat No. I of Evergreen Park
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Stephanie Thomas
From:Dan Mogen <dmogen@fcgov.com>
Sent:Friday, September 27, 2024 11:57 AM
To:Stephanie Thomas
Subject:RE: The Toy Shed- Grading Certification
The permit Jerry is looking for CO has a hold sta ng:
NEED GRADING CERTIFICATION TO INCLUDE ANY SWALES, FINISHED FLOOR ELEVATION, LOT CORNER ELEVATION AND
LOWEST BUILDING OPENING ELEVATIONS. PER JAY BARBER 416-2241
Descrip on of Work: REMOVE EXISTING MODULAR BUILDING AND CONSTRUCT NEW SINGLE FAMILY RESIDENCE ON
CRAWL SPACE WITH ATTACHED 1200 SQ FT GARAGE JOB CONTACT - JERALD RUSSELL HOMEOWNER/BUILDER
HOMEOWNER AFFIDAVIT/TEST CITY PRESCRIPT - AIR SEALING CKLST HOMEOWNER TO DO FRAMING & ROOFING PLATS
FILES REFERENCING THIS SITE: 226-3, 1196-1 AND 811
I’m also seeing the NOTE! on the site plan within the Floodplain Use Permit saying:
Finish floor must be 4975.5 or higher (actual is 4976.5) per City Storm Drainage Dept.
Exis ng grade at building site shall remain and is to be verified by licensed surveyor.
What if we held to a grading cer fica on matching this descrip on? I’m an cipa ng this would include an area around
the building considered the “building site” as you see necessary as the cer fying engineer. You can either use the
cer fica on form as it is today or generate a cer fica on le er. Is that an agreeable solu on?