HomeMy WebLinkAboutSite Certifications - 09/01/2017 (3)Page 1
OVERALL SITE and DRAINAGE CERTIFICATION
Commercial, Multi-Family and Subdivision Certification Form and Checklist
Project Name:
Date:
Building Permit Numbers:
(Commercial or multi-family)
Per the requirement in Fort Collins Stormwater Criteria Manual (FCSCM) Volume 1, Section 6.11, please fill in
all applicable items in this Certification Form for Commercial, Multi-Family and Overall Single Family sites.
NOTE: several items must be verified during construction. A copy of the approved grading plan must be
submitted with the as-built grading plan. (As-built elevations must be written in red next to the approved
elevations.)
x Use “Yes” for items completed as described.
x Use “N/A” for items that are not applicable to the site being certified.
x If any blanks are “No,” attach an explanation referencing the item number below.
Attach an explanation or description of the as-built condition for any items listed or for anything not listed but
shown on the approved construction plans.
Provide an as-built redline or Mylar drawing with the following:
I. Water Quality and Quantity Detention Basin Certification - FCSCM Vol.2, Ch.10
For multiple detention basins on a site, provide the following for each basin separately:
A.Volume: As-built topographic verification is attached at 1-foot (or less) contour intervals and
volume verification calculations for the water quality capture volume and the 100-year detention storage
volume.
1. Detention basin topography was prepared by a professional land surveyor registered in the state
of Colorado.
2. Both proposed and as-built contours are shown on the same plan sheet (dashed lines for
proposed and solid lines for as-built).
3. All critical spot elevations as shown on the approved construction plans have been verified and
the as-built elevations are shown on the plan sheet.
4. Stage-storage-discharge tables are provided on a separate document.
5. Verification that designed drain time is in compliance with Colorado Revised Statute § 37-92-
602(8) is attached and has been uploaded to the Statewide Compliance Portal
(tinyurl.com/COCompliancePortal) for approval. Uploaded documents must include:
a. The cover sheet from the approved drainage report
b. The stamped certification page from the approved drainage report
c. As-built topographic survey
d. Stamped certification page from the Overall Site & Drainage Certification
e. PDF output from the Stormwater Detention and Infiltration Design Data Speadsheet
MET THROUGH USE OF A RAIN
GARDEN
GRIT Athletics Facility
8-15-17
B1700365
N/A
N/A
N/A
N/A
N/A
N/A
Page 2
B.Water Quality and Quantity Detention Basin Grading: Attached is as-built verification that there is
a minimum 2% positive fall into the concrete trickle pans or flow-line(s) from all areas in the bottom of
the detention pond. If there is a “soft pan” in the flow-line, all areas still must meet the minimum 2%
grade requirement.
1.Low Flow: Choose one of the following detention basin low flow options as applicable:
a. Turf swale for low flow path in detention basin.
There is a minimum 2% grade in the flow-line(s) of the detention basin. The flattest as-built grade
is .
b. Concrete pan for low flow in detention basin.
There is a concrete pan installed that meets the grades as shown on the approved construction
plans. (Show as-built spot elevations.)
c. Soft pan for low flow in detention basin.
x Verify and document the soft pan material gradation, trench width and depth - to be verified
during construction by engineer. Picture documentation is preferred or engineer’s statement of
visual inspection and compliance. (Choose one below.)
o There is a soft pan with an underdrain installed that meets the design on the approved
construction plans. (Show the underdrain grades, bedding material, geotextile, spot elevations,
bends, cleanouts, etc.)
o There is soft pan installed without an underdrain but there is a type A or B soil. The soil
type must be documented by supplying verification from a registered professional geotechnical
engineer.
NOTE: Spot elevations are to be within 0.2 ft. +/-.
2.Side Slopes: The as-built side slopes of the detention basin have been calculated and are shown.
Indicate the side slope with an arrow and a numerical value (e.g., 6.25:1). The maximum slope allowed
is 4:1. Small areas of 3:1 may be acceptable, but slopes steeper than 3:1 must be stabilized or re-
graded. Provide documentation if a variance was granted for steeper slopes during the design process.
3.Spillway Certification: The following items must be field verified:
a. The location of the spillway is indicated on the as-built plan.
b. The width of the spillway is indicated on the as-built plan.
c. The elevation(s) of the spillway is shown on the as-built plan.
d. A concrete ribbon defines the location and grade of the spillway.
e. There is downstream scour protection in the spillway as per the construction plans. Indicate
type: (riprap size “D50” gradation and bedding type, geotextile, buried
riprap with inches of bury, etc.).
f. There are no obstructions in the spillway, such as trees, bushes, sidewalks, landscape
features, rocks, etc.
4926.0
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Yes
Yes
Yes
N/A
Yes
N/A
Erosion Mat (see cut sheet)
Page 3
4.Outlet Structure Certification
a. The orifice plate for the approved release rate is installed with the correct size and location of
the orifice.
b. The orifice plate for the water quality outlet is installed with the correct hole size, number of
rows and columns of holes.
c. The bottom hole on both the water quality and quantity outlets are at the bottom of the plate
so no water ponds in front of the plate.
d. The well screen is the correct material and is installed as shown on the construction plans.
e. 100-year overflow grate elevation is . (Elev. A on detail D-46)
f. The top elevation of the water quality capture volume is . (Elev. B on detail
D-46)
g. Overflow grate is made of the correct material, has the correct bar spacing, is hinged at the
top and bolted at the bottom.
h. The bottom of the outlet box has no obstructions or misalignments that will cause it to retain
runoff water and is sloped at 2% towards outlet.
II. Channels/Swales - FCSCM Vol.1, Ch.7, Sect.3&4
A.Capacity: The as-built capacity of all the major channels and swales has been verified. They meet
or exceed capacity requirements shown in the approved drainage study for this project.
1. All swales are located within the drainage easements as shown on the construction plans.
2. Longitudinal slopes and side-slopes (cross-sections) have been verified. Design criteria requires
longitudinal slopes of 2% min. (on vegetated swales) and side-slopes no steeper than 4:1. If these
criteria are not met, the certification engineer will write a justification and propose mitigation for each
instance or have the issues corrected. If variances to these criteria have previously been approved and
are shown on the construction plans, no justification is needed.
3. As-built spot elevations on channels/swales are shown that correspond to spot elevations
shown on the approved construction plans.
4. All permanent erosion control measures are installed as shown on the approved construction
plans (e.g., drop structures, riprap, TRMs, etc.). (Include pictures and verification of the materials used
as part of this verification.)
5. All pans, curbs, storm pipes or other appurtenances appropriately tie into each other in the
system. (Pictures at tie-in points suggested.)
6. The minimum freeboard is provided for all channels and swales as shown on the approved
construction plans or as identified in the approved drainage study. (Show the freeboard provided on
the cross-sections as on the construction plan set or attached as separate documentation.)
7. The low flow portion of all channels or swales is clear of obstructions. (No landscaping, trees,
shrubs, sod, etc. infringe on the low flow portion of channels or swales.)
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Yes
Yes
Yes
N/A
Yes
N/A
Yes
Yes
Page 4
III. Storm Pipes (aka storm drains) - FCSCM Vol.1, Ch.6, Sec. 4
A.Storm Drain Pipe Capacity: The as-built capacity of all pipes installed on this project has been
verified and meets or exceeds the capacity requirements shown in the approved drainage study for this
project.
1. All storm drain pipe sizes and materials have been verified and are in conformance with the
approved construction plans. (Indicate on the plan and profile sheets that they have been verified.)
Material and size substitutions must be approved prior to installation. If a pipe size or material was
changed during construction, the certification engineer must attach the approval documents or supply
them with this certification. Approval documents must include a calculation documenting the capacity
equivalency (equal or greater) of the substituted size.
2. The longitudinal slope of the pipe is as shown on the approved construction plans. The
acceptable minimum slope is 0.4%. All slopes flatter than the designed slope on the construction plans
must be justified with capacity calculations on an attached sheet.
3. The as-built invert elevations have been verified and are shown on the plan and profile sheets of
the approved construction plans.
B.Storm Drain Pipe Installation Requirements: All pipes are installed in accordance with the
approved construction plans.
1. The minimum cover requirements for all pipes have been met as shown on the approved
construction plans. These will be called out in critical locations.
2. All encasements and clearances as specified on the approved construction plans have been met.
3. Any specific joint types or construction methods specified on the approved construction plans
have been met. (List on a separate sheet and attach to this certification.)
IV. Concrete Pans - FCSCM Vol.1, Ch.7, Sec.4.1.3.4
A.Construction/Installation: All concrete pans have been constructed in accordance with the
approved construction plans.
1. The concrete pans are the correct size/width as shown on the approved construction plans.
2. The longitudinal slopes of the pans are as shown on the approved construction plans. The
certification engineer must justify or mitigate longitudinal slopes less than the minimum of 0.4% unless
a flatter slope was approved and is shown on the approved construction plans. Provide mitigation or
justification by separate document.
3. The cross-section of the pan is as shown on the construction plans. (Specifically, the pan cross-
section is “V” shaped and meets the side slope shown on the detail.)
4. The concrete pans are a minimum of 6 inches thick without reinforcement and a minimum of 4
inches thick with a minimum of 6X6-W14xW14 reinforcement per detail D20B and D20C. (Provide
documentation of the reinforcement used if different than shown on the details or on the approved
construction plans.)
5. The spot elevations shown on the concrete pan(s) have been verified and are shown on the as-
built drawings.
PER ELDER CONSTRUCTION
Yes
Yes
Yes
Yes
Yes
Yes
N/A
N/A
Yes
Yes
Yes
Yes
Yes
Yes
/1Page 5
V.Storm Drain Inlets - FCSCM Vol.1, Ch.6, Sec. 3
A.Construction/Installation: All storm drain inlets have been constructed in accordance with the
approved construction plans.
ϭ͘The size and type of inlets are consistent with the inlets shown on the approved construction
plan. Indicate by writing “Verified” on each inlet on the plan sheet or list on a separate document the
inlet number(s), type and size (length). If the inlet installed is other than the one on the approved
construction plan detail sheet, provide the name and source of the detail with justification for equal or
better capacity.
Ϯ͘The size of the inlet opening is consistent with the approved detail. (Check height and width.)
ϯ͘The elevation of the grate (if applicable) is at the elevation shown on the street profile or as
indicated by a spot elevation on the construction plans.
ϰ͘The as-built invert elevations of all pipes entering and leaving the inlet are shown on the plan
and profile sheets within construction tolerance of 0.2 feet. If substantially different, provide
justification and capacity calculations to show the capacity is not affected or propose mitigation.
ϱ͘The as-built size of the inlet box is as shown on the construction plans or an explanation or
justification is attached.
ϲ͘All dLJƉĞ͕Z͕ϭϯĂŶĚϭϲinlet covers are stenciled or stamped with the following;ŽƌĂŶ
ĞƋƵŝǀĂůĞŶƚͿĚĞƐŝŐŶĂƚŝŽŶ͗ NO DUMPING – DRAINSTO POUDRE RIVER.
VI. Culverts - FCSCM Vol.2, Ch.9
A.Construction/Installation: All culverts have been constructed and/or installed in accordance with
the approved construction plans.
1. All culvert sizes have been verified as indicated on the as-built construction plans as correct.
2. The culvert material type for all culverts installed is as on the approved construction plans and is
indicated on the as-built plans.
3. The as-built invert “in and out” elevations have been verified and are indicated on the as-built
construction plans.
4. The culvert headwalls or wing walls have been installed as shown on the approved construction
plans. Headwalls or wing walls may be needed in the as-built conditions onsite if the slopes adjacent to
the culvert are greater than 4:1. Please note areas needing stabilization in the certification narrative.
An alternative to consider is a turf reinforcement mat (TRM).
VII. Sub-Drains
A.Construction/Installation: All sub-drains shown on the construction plans have been installed in
accordance with those plans. Sub-drains installed with the sanitary sewer are to be verified on the
sanitary sewer plan and profile sheets of the construction plans. (NOTE: Indicate any sub-drains installed
after the plans were approved on the as-built plans.)
1. The size of the sub-drains are as approved on the construction plans and are indicated on the as-
built plans.
2. The type of sub-drain, in particular the perforated and non-perforated sections of the drain, are
as indicated on the approved construction plans.
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Yes
Yes
Yes
Page 6
3. The cover requirements per the construction plans are provided.
4. The cleanouts have been installed at the locations shown on the construction plans and are
accessible for cleaning. (Cleanouts can be buried a maximum of 6 inches deep with their locations
marked.)
5. The backfill materials for sub-drains are as shown on the approved construction plans. (This
includes the type, depth and width.)
6. The geo-textile liner completely wraps the sub-drain and the permeable backfill material unless
shown otherwise on the approved construction plans. (Sub-drain pipe wrapped in a sock filter material
is accepted only if approved prior to installation.)
VIII. Curb Cuts
A.Construction: All curb cut openings are constructed in accordance with the approved construction
plans.
1. The size (width) of the curb cut opening is as shown on the approved construction plans.
2. The curb cut openings tie into a downstream swale, pipe, or other appurtenances with a smooth
transition and there no obstructions such as riprap or sod impeding the flow downstream of the curb
cut.
IX. Sidewalk Culverts & Chases
A.Construction/Installation: All sidewalk culverts have been installed at the locations shown on the
approved construction plans.
1. The size (width and length) of the culverts are as shown on the approved construction plans.
2. The cover plate is a minimum 5/8-inch galvanized plate bolted to a galvanized angle iron per the
detail shown on the approved construction plans or per the City’s detail.
3. The sidewalk culvert invert “in and out” elevations have been verified and are indicated on the
as-built plans.
4. The sidewalk culvert opening is as shown on the approved construction plans or per the City’s
detail.
5. There is a smooth transition both on the inlet and outlet ends of the sidewalk culvert with no
obstructions such as riprap or sod impeding the flow into or out of the sidewalk culvert.
X.Site Grading
A.Construction: All common open spaces have been graded in accordance with the approved
construction plans.
1. The grading on all common open spaces bordering private lots has been verified as correct and
the as-built rear lot corner elevations have been shown on the as-built plans.
Yes
Yes
Yes
N/A
Yes
Yes
Yes
N/A
N/A
N/A
N/A
N/A
N/A
Yes
Yes
Page 7
2. The as-built contours for “overlot grading” are shown on the as-built construction plans for all
common open spaces, tracts, outlots, etc. If not in compliance, please attach a narrative describing the
situation for noncompliance and when it may be corrected. An escrow for overlot grading may be
required. (NOTE: Residential Lot Grading Certification is a separate process from this Overall Site
Certification. It is understood that residential lots will be brought to final grade once the foundation is
backfilled so they may be lower than the plan shows at this Overall Site Certification stage.)
3. All turf reinforcement mats (TRMs) have been installed as shown on the approved construction
plans and the slopes are stabilized.
XI. Riprap - FCSCM Vol.1, Ch.7, Sec.4.4.4.3
A.Construction: All riprap has been installed in the locations and sizes indicated on the approved
construction plans.
XII. Permanent Erosion Control Fabric - FCSCM Vol.1, Ch.7
A.Construction: All fabric has been installed in the locations and sizes indicated on the approved
construction plans.
1. All fabric was installed per the details on the approved construction plans.
XIII. Post-Construction Site Cleanup - FCSCM Vol.3, Ch.7
A.Construction: All construction debris and obstructions of any kind have been removed from
drainage paths.
1. All construction debris has been removed except in staging area(s).
2. All ruts have been smoothed out in all construction areas.
3. All areas needing reseeding have been identified and future stabilization goals have been
coordinated with the Erosion Control Inspector and in accordance with FCSCM Vol.2 Chapter 12. Note
the area needing stabilization in the narrative.
XIV. Certification of Other Permanent BMPs - FCSCM Vol.2, Ch.8, Sec.2 & FCSCM Vol.2, Ch.12
A. The construction of channel drop structures is in accordance with the approved plan both in
location, horizontal dimensions and cross-section.
XV. Certification of LID and Water Quality Facilities - FCSCM Vol.3, Ch.4
A. Attached are the During Construction Inspection Checklist for Low Impact Development (LID) and
other items to be verified during construction, along with pictures and other required documentation.
N/A
Yes
Yes
N/A
N/A
Yes
Yes
Yes
Yes
Yes
Yes
Page 8
XVI. Certification and Erosion Control Measures
A.All temporary erosion control measures shall be removed upon stabilization. If at the time of preparing
this certification there are any erosion control measures still remaining on the site, please note them in
the narrative and verify that they need to remain at this time. If in doubt as to the need for any control
measure, please consult with the Erosion Control Inspector at 970-221-6700.
XVII. Statement of Compliance
A.This certification is signed and stamped. By signing this form, the engineer(s) attests that he/she has
visited and observed the site, and to the best of his/her knowledge, the as-built conditions of the drainage
facilities are as described in the above form and in the enclosed as-built plans.
B. Failure to properly disclose all known information could result in the rejection of this certification and
prevent the release of any and all Stormwater Utility permit holds on Building Permits and/or Certificates
of Occupancy within this development.
XVIII. Signature and Stamp by a Colorado-Registered Professional Engineer
Engineer’s contact information:
Name:
Email:
Phone:
Company:
Address:
PE Stamp
Sign and date
Michael Oberlander
moberlander@interwestgrp.com
970-460-8471
Interwest Consulting Group
1218 W. Ash St., Suite A
Windsor, CO 80550
:$6+67(&:,1'625&2/25$'27(/ ²)$;
August 18, 2017
Mr. Dan Mogen
City of Fort Collins Stormwater
700 Wood Street
Fort Collins, CO 80522
Re: GRIT Athletics Facility–Site Certification
Dear Dan,
Please accept this letter as the Site and Drainage Certification for the GRIT Athletics
Facility project. Survey of the site was completed on August 15, 2017 by Northern
Engineering. A site visit was conducted on August 15, 2017 by Michael Oberlander of
Interwest Consulting Group.
The final landscaping for the site is in progress and there are some clean-up items around
the rain garden to be addressed. My assessment is that the items constructed are in
general conformance with the approved design. I have attached the as-built survey of the
site. I have also attached the as-built drawings of the Utility Plan and the Grading Plan
and the Overall Site and Drainage Certification Form and Checklist.
We appreciate your time and consideration in reviewing this certification. If you have
any questions or need additional information please feel free to call at any time (970)
460-8471.
Sincerely,
Michael Oberlander, P.E., LEED AP
Colorado Professional Engineer 34288
Western Excelsior manufactures a full line of Rolled Erosion Control Products (RECPs). Excel
PP5-8 Turf Reinforcement Mat (TRM) is composed of 100% synthetic components. A matrix of green
synthetic fibers is mechanically (stitch) bound between two UV stabilized, heavy duty synthetic
nets. Stitching is secured on two inch centers using UV stabilized, heavy duty polypropylene
thread. Excel PP5-8 is a permanent, three-dimensional TRM that provides immediate erosion
protection and long term turf reinforcement and is intended for slope or channel applications
requiring erosion protection for greater than thirty-six months.
Each roll of EXCEL PP5-8 is made in the USA and manufactured under Western Excelsior’s
Quality Assurance Program to ensure a continuous distribution of fibers and consistent thickness.
Typical manufactured properites are provided in Table 1 and product characteristics are provided
in Table 2
Specifications Member
Table 1- Specified Expected Values
Tested Property Test Method Value
Tensile Strength (MD) x (TD) ASTM D6818 25.0 lb/in (4.4 kN/m) x 18.0 lb/in (3.2 kN/m)
Elongation (MD) x (TD) ASTM D6818 25 % x 35 %
Mass Per Unit Area ASTM D6566 8.0 oz/yd^2 (271 g/m^2)
Thickness ASTM D6525 0.34 in (9 mm)
Light Penetration ASTM D6567 35 % open
Water Absorption ASTM D1117 N/A %
Resiliency ASTM D 6524 89 %
Porosity Computed 97 %
UV Stability ASTM D 4355 80% (1000 hr) %
Table 2 - Netting
Top Net Type Synthetic, UV Stable
Bottom Net Type Synthetic, UV Stable
Top Net Opening Dimensions 0.7 in (17 mm) x 0.7 in (17 mm)
Bottom Net Opening Dimensions 0.7 in (17 mm) x 0.7 in (17 mm)
Excel PP5-8 is available in multiple roll sizes ranging in width from 8.0 ft to 16.0 ft. and 112.5 ft to 600
ft in length. Standard roll sizes are 100 square yards, measuring 8.0 ft wide by 112.5 ft long. Custom roll
sizes are available upon request.
Material Properties and Dimensions
Excel PP5-8TM
Document # WE_EXCEL_PP58_SPEC | 866-540-9810 / wexcotech@westernexcelsior.com | Updated 6/27/2017
The information contained herein may represent product index data, performance ratings, bench scale testing or other material utility quantifications. Each representation may have
unique utility and limitations. Every effort has been made to ensure accuracy, however, no warranty is claimed and no liability shall be assumed by Western Excelsior Corporation
(WEC) or its affiliates regarding the completeness, accuracy or fitness of these values for any particular application or interpretation. While testing methods are provided for
reference, values shown may be derived from interpolation or adjustment to be representative of intended use. For further information, please feel free to contact WEC.
1
Dan Mogen
From:Mike Oberlander <moberlander@interwestgrp.com>
Sent:Wednesday, August 30, 2017 5:38 PM
To:Dan Mogen; Erika Schneider
Cc:'KevinK'; 'willy.butler@elderconstructioninc.com'
Subject:RE: GRIT Athletic Facility Site Cert
Attachments:RE: GRIT EC Question
Hi Dan‐
I wanted to get with you right away on the erosion mat that was installed. I have attached an email from you where you
said that as long as it was a permanent mat, it did not need to be a scour stop and you didn’t need to see it (at least that
is how I read it). We are installing these mats in very low velocity areas and I told Elder that if they had a mat that was a
permanent mat (not a biodegradable temp) it would be OK (based on the email). I suggested a TRM product and that is
what Elder installed. Once a stand a grass grows through this mat, I am very confident it will be a good long term
solution. In any case, if it failed we do have the rain garden that would be a safeguard, but I don’t see the TRM failing in
this location.
I will be in from about 7:30 to 9 tomorrow and then at meetings if we need to chat.
Michael Oberlander, PE, LEED AP
Interwest Consulting Group
DIRECT – 970‐460‐8471
C – 970.631.2671
From: Dan Mogen [mailto:dmogen@fcgov.com]
Sent: Wednesday, August 30, 2017 5:22 PM
To: Erika Schneider; Mike Oberlander
Cc: 'KevinK'; 'willy.butler@elderconstructioninc.com'
Subject: RE: GRIT Athletic Facility Site Cert
Mike and Erika,
I reviewed the paperwork and got out to the site today to do an inspection. I have a couple quick updates I’m looking
for on the paperwork and one suggestion of an improvement that wasn’t included in the plans. The bigger issue for me
at this point is the erosion control product installed. ScourStop was called out in the plans as we needed to have
permanent EC in a few areas; this was specified instead of riprap or other alternatives. I’m hearing that someone at the
City may have approved a change to a different product; is that the case? Can you please provide any documentation
with that?
Beyond that, I have the following items at this point:
1. Mike, please sign and date stamp on the record drawings provided with the certification.
2. Willy, please see attached redlines for update per our conversation earlier. I didn’t mention on the phone, but if
you have any load tickets you could provide, I’d appreciate that too.
3. A suggestion. The underdrain pipe does not currently have the stabilization that I would expect to see, and I
recommend adding a small concrete collar (small headwall) to the end where it daylights. This will help prevent
future maintenance issues that we’ve see arise when the end of the pipe becomes crushed or buried. This isn’t
required for me at this time, but I do recommend completing that before landscape fills in.
2
I need to figure out the erosion control questions and get an update per #1 and #2 above before signing off for
CO. Please let me know if you have any questions on these items.
Thanks,
Dan
Dan Mogen, EI, CFM
Development Review Engineer
Stormwater Engineering & Development Review Division
City of Fort Collins Utilities
(970)224‐6192
dmogen@fcgov.com
From: Erika Schneider [mailto:eschneider@interwestgrp.com]
Sent: Monday, August 21, 2017 6:41 AM
To: Dan Mogen
Cc: Mike Oberlander
Subject: RE: GRIT Athletic Facility Site Cert
Hi Dan,
Here is the stamped survey.
Thanks,
E
Erika Schneider, P.E.
Interwest Consulting Group | eschneider@interwestgrp.com
1218 W. Ash St., Suite A | Windsor, CO 80550
D 970.460.8485 | www.interwestgrp.com
ELECTRONIC DISCLAIMER: Information contained herein is neither necessarily complete nor accurate. Final stamped and signed
documents govern. Use of these data is solely at the user’s risk. By accessing the data contained in these files the user agrees to
indemnify, hold harmless and defend Interwest Consulting Group, their employees, officers and agents from any and all claims
arising from the use of the data.
8-15-17
SITE
VISIT
PHOTOS
RAIN GARDEN
INSTALLATION
PHOTOS
1218 W. ASH, STE. A, WINDSOR, COLORADO 80550
TEL. 970.674.3300
September 12, 2017
Mr. Dan Mogen
City of Fort Collins Utilities
700 Wood Street
Fort Collins, CO 80522
Re: GRIT Athletics Facility
Certification of Lot Grading
Dear Dan,
Interwest Consulting Group was the design engineer for the GRIT Athletics Facility
which is located at 846 SE Frontage Road. The design consists of a single commercial
building and modifications to the existing parking and drives.
Please accept this letter and attachments as the Certification of Lot Grading for GRIT
Athletics Facility. I visited the site on 9-8-17 and verified visually the surveyed items.
The Certificate of Lot Grading form is attached. The following items are checked “no”
on the form and require additional explanation:
4. Top of Foundation – The building is a commercial structure with drive-in doors.
The ground is lower than the building in all locations.
5. Minimum Grade Away from Structure – There is fall/drainage away from the
commercial building, but not 5% in all locations.
11. Landscaping –The landscaping should be completed now but was not seeded at the
time of the survey.
We appreciate your time and consideration in reviewing this certification. If you have
any questions or need additional information please feel free to call at any time (970)
460-8471.
Sincerely,
Michael Oberlander, P.E., LEED AP
Colorado Professional Engineer 34288