HomeMy WebLinkAboutSite Certifications - 08/24/2015Aferovej
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Geico Office Building F ity.6f lilnS
2024 Harmony Road
COMMERCIAL, MULTI -FAMILY AND SUBDIVISION
CERTIFICATION CHECKLIST
(Overall Site Drainage)
Please fill in all applicable items in this Certification Form for Commercial, Multi -Family and
Overall Single Family sites. A copy of the approved grading plan must be submitted with the as -
built grading plan. (It is preferred to have the as -built elevations written in red next to the
approved elevations)
Use "OK" for items checked or actual numbers for items verified/surveyed in the field.
Use "N/A" for items that are not applicable to the site that is being certified.
Please provide an As -Built Redlined or Mylar drawing showing the following:
A. Detention, Drainage Facilities, and Common Open Spaces As -built Additional Detention Volume = 3,710 cu. ft.
1. Pond Certification Design Additional Detention Volume = 3,319 Cu. ft.
Required Additional Detention Volume = 2,g17 Cu.. ft.
OK • Provide Topographic Records and Volume Verification Calculations both tit Detention volume exceeds
both the design and the required
volumes.
OK • Provide Pond Cross -Sections and Spot Elevations (especially @ Pond Embankment and
Pond Flow Line)
OK • Positive Fall to Ian (if applicable)
N/A • General Pond Grading including all Side -Slopes
OK •• Invert Elevation
N/A • Forebay Construction and Elevation
OK • Spillway Weir (Location, Elevation, Height, Opening Width)
OK • Placement and size of riprap or alternative permanent erosion control measures
Erosion Control Matting was used at the outlet.
OK • Orifice Plate and/or Water Quality Outlet Structure Installation
OK • Water Quality Capture Volume (Volume Required, Volume Provided and Water
Surface Elevation) water quality Volume was
included with the detention
pond within the pavers.
N/A • Berm and Embankment Compaction Level
OK* • Subsurface Media for Water Quality Ponds and Swales
SINGLE ASTERISK (*) = PER INFORMATION SUPPLIED, ENGINEER UNA13LE TO VERIFY.
.V I NORTHERN
ENGINEERING
Fdrt Collins
2. Swales
OK Location (are they within easement?)
OK • Dimension and Cross -Section Verification
OK • Longitudinal Slopes and Side -Slopes
OK • Spot Elevations
OK • Permanent Erosion Control Measures (drop structures, riprap, lining)
Concrete Pan and Sod.
OK • Tie-in to Storm Lines, Pans, Curbs, or other appurtenances
OK a Required Minimum Freeboard, Provided Freeboard
NO • Landscaping Infringement on Flow Line?
3. Pipes
OK • Size and Type
OK • Slopes (As -Built and comparison to 0.4% Minimum)
N/A . Pipe Capacity Calculations (if slopes are significantly altered from design)
OK • Invert Elevations
*N/A . Installation and Backfill
*N/A . Cover
*N/A . Encasement and Clearance from other nearby utility lines
*N/A . Joints Type and construction
SINGLE ASTERISK (*) INDICATES ITEMS NOT ABLE TO BE VERIFIED BY ENGINEER.
■� INORrTHERN 2 Geico Office Building
ENGI2024 Harmony Road
Fort Collins
4. Concrete Pan Channels
OK a Size
OK a Slope
OK a Cross Section
*N/A e Thickness
OK a Elevations
5. Inlets
OK a Size and Type
OK a Size of Opening (or name of Standard Detail used)
Two inlets are flat grates instead of donne grates. This isn't
OK e Grate Elevation an issue for capacity, but could clog and continued
maintenance will need to occur.
OK el Invert Elevation
OK a Box Size
6. Street Cross -Pans
OK e Size
OK e Type
OK a Grade
OK a Elevations
N/A* e Cross -Sectional Depth
OK e Tie-in to Curb and Gutter
NORTHERN 3 Geico Office Building
ENGINEERING 2024 Harmony Road
F6rt Collins
7. Culverts
N/A • Size
N/A • Type
N/A • Invert Elevations
N/A • Headwalls or Wing Walls
8. Sub -Drains
OK Y Size
OK e Type (Perforated/Solid)
N/A* • Cover
N/A* • Backfill
N/A* e Geo-Textile Liners
OK • Clean -Outs
9. Curb Cuts
N/A • Size
N/A • Tie-in to Swale, Pipe or other appurtenances
10. Common Open Spaces
OK • Overall grading contours of open spaces
OK • Spot elevations adjacent to private lots (property corners)
■� INORTHERN 4 Geico Office Building
ENG2024 Harmony Road
Fort Collins
B. Grading certification
1. Certification of Grade Elevations:
OK. o Minimum Opening Elevations
OK • Top of Foundation Elevations
OK • Comparison to 100-year Water Service Elevations
OK • Comparison to Freeboard Elevations and Base Floodplain Elevations— BFE
2. Verification of Site Grading:
OK • Engineer to evaluate site grading compliance with the approved grading plan.
OK a As -built elevations are to be redlined onto the approved grading plan sheet
showing the as -built spot elevations next to the design spot elevations so
compliance can be verified and documented.
C. Certification of Erosion Control Measures:
I I
1. Permanent BMP Measures:
OK • Permanent Vegetation (no more than 6" bare spots and weeds under control)
N/A • Riprap or alternative permanent erosion material
N/A • Riprap Bedding
N/A • Cut -Off Walls or Channel Drop Structures Cross -Sections
N/A • Sediment Basins
N/A • Water quality ponds/Sand Filter/Bio Retention Construction and liners
OK • Permanent Netting Mats or Blankets
N/A • Mulching and Seeding Sod
NORTHERN 5 Geico Office Building
ENGINEERING 2024 Harmony Road
Cf
Fort Collins
2. Temporary BMP Measures:
N/A • Mulching and Seeding Sod
N/A • Temporary BMP Measures as shown on Erosion Control Plan
D. Post -Construction Site Cleanup:
OK • Construction Debris Clean -Up (In particular debris affecting the drainage)
OK • Smoothing of Ruts in all Construction Areas
OK Reseeding of all Areas Affected by Construction Activities
(Usually enforced by the City's Erosion Control Inspector but the engineer
Certifying the site needs to notify the contractor if areas are not seeded)
E. Statement of Compliance:
This certification is signed and stamped and by signing this form the Engineer(s) attests
that they have inspected the site and to the best of their knowledge the as -built
conditions of the drainage facilities are as described in the above form and in the As -
Built plans enclosed.
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.
F. Signature and Stamp by a Colorado Registered Professional Engineer
Roger Curtiss, PE
Colorado PE Registration No. 27362
NORTHERN 6 Geico Office Building
ENGINEERING 2024 Harmony Road
,7� rR
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APPENDIX A
General Grading
6 AIV
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APPENDIX B
Permeable Pavers
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Concern: Small portions of pavers where installed because the monitoring
wells wF, - rotated 45". This may cause constant maintenance issues in the future.
APPENDIX C
Permeable Paver Checklist
NorthernEngineering.com // 970.221.4158
Construction Inspection Checklist for Permeable Interlocking Concrete Pavers
Item/ Yes INO INIA I Dommentation/Submittal Requirements
Excavation
Post -excavation infiltration rates are greater than 0.5
in/hr (for "full -infiltration" designs) _ s'-
Im rmcable Liner
Impermeable liner meets design specifications _
I Impermeable liner attached to concrete perimeter wall
✓'
Impermeable liner is not exposed
/
-
Underdrain System
Underdrain pipe is per design specifications
At least one cleanout is provided per underdrain lateral
Cleanout pipe is not perforated
Cleanouts covers are ir
I
far,
Underdrain is NOT wrapped in geotextile fabric
..'
Underdrain orifice plate installed at outlet structure
Underdrain inWrity - teste�aher backfilling using Tv
and/ water test
- - Aggregate
Base coarse (e.g. a2/4) has 90% fractured faces ✓'
_
Bedding coarse (e.g. #89) is WoraeghlYsvastt e,
Subbase materials are installed and compacted acco ding
to manufacturer specifications I
,-
,
Protection During Construction
PICP area is protected from construction site sediment,
including runoff from the upstream catchment
construction equipment traffic.
I adze out
Upstream catchment is stabilized prior to diverting runoff
into PICP system
✓
...L---
9/9/2024 Revision
Construction Inspection Checklist for Permeable Interlocking Concrete Pavers
Item/Activity Yes I No I N/A Documentation/Submittal Requirements
Excavation
Post -excavation infiltration rates are greater than 0.5
in/hr (for "full -infiltration" designs)
I
x
Not in OBS 1500 SF add on scope Mao
Impermeable Liner
Impermeable liner meets design specifications
x
Impermeable liner attached to concrete perlmeterwall
x
Impermeable liner is not exposed
x
Underdrain System
Underdrain pipe is per design specifications
x
Not In DES 1500 SF add on scope Mao
At least one cleanout is provided per underdrain lateral
Cleanout pipe is not perforated
Cleanouts covers are Installed and watertight
Underdrain is NOT wrapped in geotextile fabric
Underdrain orifice plate installed at outlet structure
x
done by others
Underdrain integrity tested after backfilling using TV
and/or water test
Aggregate
Base coarse (e.g. #2/4) has 90%fractured faces
x
Confirmed in DES add on area Mao
Bedding coarse (e.g. #89) is thoroughly washed
x
Confirmed in DES add on area Mao
Subbase materials are installed and compacted according
to manufacturer specifications
x
Confirmed In DES add on area Mao
Protection During Construction
PICP area Is protected from construction site sediment,
including runoff from the upstream catchment and
construction equipment traffic.
x
Confirmed In DES add on area Mao
Close Out
Upstream catchment is stabilized prior to diverting runoff
into PICP system
9/9/2014 Revision
`�� 7-14-15
APPENDIX D
Storm Sewer
Yl/zg - volacify Now
North ern Englneering.com 11 970.221.4158
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APPENDIX E
Detention Facilities
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Project Mle Gelco Office BulldIng Date: August 11, 2015
Pmjen Number 959.001 Ulcs By: C. Snowdon
Client Steve Allen
Pond Designation As -Built Detention Volume
4,96190
126A
N/A
N/A
0
0
N/A
N/A
N/A
0
0
4,96200
570.64
0.1
17.35
37.35
1494
N/A
NIA
N/A
0
14.94
4,962A0
1,067.14
0.1
8189
11924
47.696
N/A
NIA
N/A
0
47 G96
4,96220
1,39126
0.1
123.22
24246
9G.984
N/A
N/A
N/A
0
96.9M
4,962.30
], G26.51
0.1
151.19
393. fi5
157.46
N/A
N/A
N/A
0
15746
4,962,40
L854.34
O.1
17404
567,69
22J.O76
N/A
N/A
N/A
0
227.076
4,962,50
2,083.915
0.1
196.92
764. 61
30S 944
N/A
N/A
N/A
0
305,844
4,962.60
2,290.84
0,1
218,14
983,35
393.34
N/A
N/A
N/A
tl
393.34
4,96270
2,380.26
0.1
23355
12169
49676
N/A
N/A
N/A
0
496,7G
4,962.80
2,493.59
0.1
243.69
1460.59
584.236
N/A
N/A
N/A
0
584235
4,962.90
2,G96.12
0.1
259A9
1720.09
688.032
N/A
N/A
N/A
0
688032
4,963.00
2,938,30
0.1
28177
2001.8
800. 73
N/A
N/A
N/A
0
800,72
4,963.10
3,188AG
01
30634
230E 14
923.25G
N/A
N/A
N/A
0
923,255
4,963,20
3,44G 56
0.1
331 75
2639.89
1055.956
N/A
N/A
NIA
0
1055.956
4,963.30
3,711,94
0.1
35792
1997.81
1199,124
N/A
N/A
N/A
0
i199.124
4,96340
4,004.32
a
38581
3383.62
1353448
N/A
N/A
N/A
0
1353448
4,963.50
4,394.66
0.1
419.95
3803.57
1521.428
N/A
N/A
N/A
a
1521428
4,963,50
4,736, 14
a 1
456.54
4260. 11
1704.044
N/A
N/A
N/A
0
1704.044
4,96370
4,93044
0.1
483.33
4743.44
1897.376
N/A
N/A
N/A
0
1897.376
4,963.80
5,073.88
0.1
500.22
5243.65
2097.46
N/A
N/A
N/A
0
2097.46
4,95390
5,181.10
0.1
51275
57564
2302.56
N/A
N/A
N/A
O
2302.56
4,964.00
5,256.61
a
521.99
627829
2511.316
N/A
N/A
N/A
0
2511.316
4,961.10
5,298.27
0.1
52J.J4
G806.03
2722,412
12.09
N/A
N/A
0
2722412
4,964.20
5.228,99
0.1
526.36
)332.39
2932,956
132.06
0.1
Z21
7,21
2940.166
4,964.30
5,001,18
0.1
511. Si
78439
3131 S6
405,71
0.1
26.89
34.1
3171.66
4,964.40
4,6249D
0.1
481.3
8325.21
3330 OM
821.92
0.1
61.69
95.78
3425.864
4,984.50
4,14065
0.1
438.28
816348
3SOS 392
1,34910
0.1
108.85
204G3
3710022
PM4
APPENDIX F
Record Drawings
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