HomeMy WebLinkAbout912 WOOD ST. (PATEROS CREEK) - MOD - MOD120004 - REPORTS - CORRESPONDENCE-HEARING (15)912 WOOD STREET
LOCATED IN THE SOUTHWEST QUARTER OF SECTION 2, TOWNSHIP 7 NORTH, RANGE 69 WEST OF THE 6Ih P.M.
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W INORTHERN
ENGINEERING
ADDRESS: PHONE:970.221.4158
200 S. College Ave. Suite 10 W :
Fort Collins, CO90524 FAX:970.221.4159 www.northernengineering.com
Mr. Eric Tracy, PE, CFM October 20, 2011
Larimer County Engineering Department
200 West Oak Street, Suite 3000
Fort Collins, Colorado 80522
RE: 912 Wood Street
Floodplain Permit
Dear Mr. Tracy,
This letter and attached exhibit are intended to serve as the application to obtain a grading/development permit
for earthwork activities within the FEMA regulatory Cache la Poudre floodplain. The subject property is located
at the terminus of Wood Street approximately a quarter -mile north of the City of Fort Collins Utility Service
Center. The site is owned by Sidehill Investment LLC.
The land owner wishes to perform minor excavation on a portion of the property, noted as "Excavation Area" on
the attached exhibit. The land owner also proposes to fill a portion of the property, noted as "Fill Area" on the
attached exhibit. The proposed fill area was previously mined for gravel and the intent is to restore the ground
to more closely match its historic condition.
There are actually two excavation areas; both of which are located outside of the Cache la Poudre 6-inch
floodway, and are within the 100-year flood fringe of the Poudre River. The first excavation will remove a berm
of concrete rubble. Said berm is not currently recognized by the floodplain modeling; therefore, there will be no
change to the effective floodplain boundaries. The second excavation area will expand a small pond in the
southeast corner of the property. The pond excavation is located in an ineffective flow area, and there will be
no effect to the floodplain boundary or base flood elevations as a result of the proposed excavation.
The fill area is also located outside of the Cache la Poudre 6-inch floodway, and is within the 100-year flood
fringe of the Poudre River. The proposed fill location is within a backwater area that does not convey water in
the principal downstream flood flow direction. By definition, fill can be placed in such ineffective flow areas
without obstructing any further conveyance and without changing water surface elevations, flow velocities, or
floodplain boundaries.
The proposed earthwork activities are allowed within the FEMA regulatory 100-year flood fringe for the Cache la
Poudre River. The will be no changes to the effective floodplain boundaries or base flood elevations as a result
of the excavations or fill. Be advised; however, that the land owner does intended to apply for a LOMR-F with
FEMA after the fill has been placed in order to revise the mapped flood fringe.
Please feel free to contact me or Nick Haws at 221.4158 with any questions you may have.
Sincerely,
NORTHERN fNGINEERING SERVICES, INC.
Aaron Cvar, PE
cc: Marsha Hilmes-Robinson, CFM - City of Fort Collins Floodplain Administrator
Gino Campana - Sidehill Investment LLC
enc.
Proposal Review Checklist
Site development plans are complete and depict flood hazard data
/ WeRx IN fHC it103 ��LW70 �IZil�l.8�
V Engineering data is provided for proposed map-and-flee&A :exs
_LfA Floodway certificate and data document no increase in flood heights
n!/A Subdivision proposals minimize flood damage and protect utilities
Lowest floor elevations are at or above the 100 year base flood elevation
N A Manufactured homes address elevation and anchoring requirements
r! 4— A flood proofing certificate has been submitted
Other:
Permit Action and Compliance Documentation
Permit Approved : The proposed project was reviewed and is in compliance with flood plain
management standards as established by FEMA and Larimer County
Permit Denied : The project was denied and information is in Flood Review Board files
Variance Granted : A variance to the 100 year base flood elevation was granted and
information is in Flood Review Board files
Variance Granted : A variance was granted from the Code for all or part of the 18 inch lowest
floor protection elevation
Elevation Certificate : A certificate was returned before a certificate of occupancy was issued
Flood Proofing Certificate : Certification was returned before a certificate of occupancy was
issued
Co lood Plain Official's Signature
O �ate-
Comments: Ir IS A11111:1p4 /.Wr &16' ?14k ASCAa e _ 000A
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Flood Plain Development Permit
Permit Number - FP Date t o
Owner SIDE lA%LL 1 N1Ve5Tt"n TT, LL C, Phone W10- 2 -9 - S9 CU
Address_ Ci12 WOU0 STRx� SaT CK-ot-ii
Contractor Cmhso Ca wg wh ( Cow Acr) Phone 910-2.A- SgUb
Address__3'702. nnRIJNA-1TA4 A%rC STE Sol
Project Address/Location C1 Q, WOUO S'f946eT, fb2'f CO-LUAIS
Single Family Residence
Multi -Family Residence
Manufactured Home
Commercial
Project Description
New Construction
Improvement >50%
Improvement <50%
Channelization Fill
Bridge/Culvert _Levee
Rehabilitation Other
Explanation: 4Qo91L1 ATI ohJ'1 CGEAA, A((v G121 WIAZ r ExeAyAT7cx OF EXC4y4no#U i}4M
AA10 E)rGAyrt?h;c/ i,dM Z, ANO ANY OTNf9c AC-9*441b4y QXAeAC PRI04 Ta AA+y
FILL rewC4 PEACCP WIIHIVa 11 E t`uoo/�(Abi,►y�w,r.1.
Flood Hazard Data
Watercourse Name�,0/1�
The project is in the Floodway NV The project is in the Flood Fringe YES
The 100 year base flood elevation for the project is VA e%ID - 54SE Ar ~ZO Fi.^3
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Lowest Floor Protection Elevation required add 44 feet N1A - rom wbnlc. (i mg eaffasefl
Flood Proofing Elevation required
Source Documents: Reports/Maps used 9$Uto°l C.U911Q - FlRN1r FIS mfug 188yo
From: Eric Tracy <tracvel(cDco.larimer.co.us>
To: Nick Haws <nickna.northernenQineering.com>
Sent: Thu, Oct 20, 2011 19:26:02 GMT+00:00
Subject: Re: floodplain permit for 912 Wood St.
Nick,
Sorry for the delayed response. I've attached the Floodplain Development Permit to this email. If you have any
questions, please let me know.
You fill out the front and I will fill out the back. The only item I will need under the checklist is a site plan
(basic grading plan) as we discussed in the field. The rest are not applicable in this situation.
Eric Tracy, PE, CFM
Latimer County Engineering Department
200 W. Oak St., Suite 3000
PO Box 1190
Fort Collins, CO 80521-1190
Phone: (970) 498-5729
On Wed, Oct 19, 2011 at 11:06 AM, Nick Haws <nick(c�northernen ing eerieg com> wrote:
Eric,
I was wondering if the floodplain grading permit required any information from the land owner? I'm meeting
with Gino Campana at noon today, so if he needs to provide anything I'd like to coordinate with him at that
time.
FlIfflem, 271
Nick Haws, PE, LEED AP
NORTHERN ENGINEERING
200 South College Avenue, Suite 10 1 Fort Collins, Colorado 80524
0: 970.221.4158 ext. 54141 D: 970.568,54141 M: 970,690,0927
F: 970.221.4159 1 nickanorthemen¢ineering.com I www.northemenkineering.com
3
Again, thank you for the opportunity to provide feedback on the proposed plan. Feel free to call me with any questions
you have about the above comments.
Marsha
Marsha Hilmes-Robinson, CFM
Floodplain Administrator
City of Fort Collins Udlities
P.O. Box 580
700 Wood Street
Fort Collins, CO 80522-0580
Phone: (970) 224-6036
E-Mail: mhilmesmbinsonnfmov.com
From: Gino Campana [mailto:gcampana@bellisimoinc.com]
Sent: Thursday, October 20, 2011 2:41 PM
To: tracyel@co.larimer.co.us
Cc: Aaron Cvar; Andy Reese; Marsha Hilmes-Robinson; Bill Nicholl (bnicholl@gerrardinc.com); Nick Haws
(nick@northernengi needng.com)
Subject: RE: floodplain permit for 912 Wood St.
Eric, please find attached the permit application and the letter with exhibit from Northern Engineering. As I said in my
vm, let me know if this will work or if you need me to bring you an original application. Additionally, please give me an
estimated time that the permit may be ready so that we can efficiently schedule our excavator.
Thanks!
row 6__A e4
Gino Campana
Bellisimo, Inc.
Ph.97o.229.5900
Fax 970.223.5740
3702 Manhattan Ave, Ste tot
Fort Collins, CO.8o526
++++++CONFIDENTIALITY NOTICE++++++
The information in this email may be confidential and/or privileged. This email is intended to be reviewed by only the
individual or organization named above. If you are not the intended recipient or an authorized representative of the
intended recipient, you are hereby notified that any review, dissemination or copying of this email and its attachments,
if any, or the information contained herein is prohibited. If you have received this email in error, please immediately
notify the sender by return email and delete this email from your system.
From: Nick Haws [mailto:nick@northernengineedng.com]
Sent: Thursday, October 20, 2011 2:19 PM
To: Gino Campana
Cc: Aaron Cvar; Andy Reese
Subject: Fw: floodplain permit for 912 Wood St.
Nick Haws, PE, LEED AP
NORTHERN ENGINEERING
-----Original message-----
Nick Haws
From: Nick Haws
Sent: Tuesday, November 01, 2011 2:01 PM
To: 'Marsha Hilmes-Robinson'; 'Gino Campana'; tracyel@co.larimer.co.us
Cc: Aaron Cvar; Andy Reese; Bill Nicholl (bnicholl@gerrardinc.com); 'Gina Hatton'; Lindsay Ex;
Ted Shepard; Mark Sears; Steve Dush
Subject: RE: floodplain permit for 912 Wood St.
Attachments: 2011-11-01 _912-Wood-St_Larimer-County-floodplain-memo. pdf
Eric and Marsha,
The attached PDF contains the final memo and exhibit, both of which have been revised to address the comments
below. Please let me know if you have any further questions or comments.
Thanks,
Nick Haws, PE, LEED AP
NORTHERN ENGINEERING
From: Marsha Hilmes-Robinson[maiIto: MHILMESROBINSON@fcgov.comj
Sent: Wednesday, October 26, 2011 12:11 PM
To: 'Gino Campana'; tracyel@co.larimer.co.us
Cc: Aaron Cvar; Andy Reese; Bill Nicholl (bnicholl@gerrardinc.com); Nick Haws; 'Gina Hatton'; Lindsay Ex; Ted Shepard;
Marsha Hilmes-Robinson; Mark Sears; Steve Dush
Subject: RE: floodplain permit for 912 Wood St.
Gino and Eric,
Thank you for the opportunity to provide input on the proposed fill plan that you submitted to Larimer County Engineering.
I have coordinated with several other City departments including Current Planning and Natural Resources. Our
comments are as follows:
1. The plan shows fill taking place where there are existing homes. Furthermore, some of the fill may be shown
where the existing septic clean -out location is located. The fill is also shown across the road, which would be an
emergency access issue. The fill in these areas seems premature. Staff would suggest a phased approach.
Show the fill that can be done without impacting the existing road and structures as Phase 1. Later, after all of the
structures have been removed, then the remaining fill could occur as part of a separate permit and plan. Both
phases could be combined into one LOMR-Fill while still in the County.
2. The excavation areas do not show any proposed grading. This is of importance especially in the excavation area
2. This is a pond that the applicant has proposed using as both a water feature for the site's future residents and
to use the outflow of that feature to support the vegetation in the floodplain. Staff is initially supportive of this
concept. While we do not believe this excavation will preclude such a feature from being developed in the future,
we do want to make sure this overall vision is maintained throughout the process.
3. The fill may not be high enough to show the area removed from the floodplain at the northwestern portion of the
fill area. Spot elevations will need to show that the fill is above the BFE. Staff would suggest reviewing the
grading plan and giving yourself some extra fill amount to make sure you are at least above the BFE for the
LOMR-Fill.
4. City staff would like to have a note on the plan that acknowledges that any future structures in areas removed
from the floodplain by a LOMR-Fill will be required to have the lowest floor (including basement), HVAC, electrical
and other mechanical elevated two feet above the 100-year flood elevation.
5. To support the statements made in the memo regarding the fill being in an ineffective flow area, it would be
helpful to have a drawing/calculations that supports this statement (See the draft memo from Brian Varrella for
guidance).
6. City staff would request that the floodway for the West Vine and Poudre River floodplains be staked in the field
prior to work commencing so that no construction activity take place within the floodway. This should be a note
on the plans.
912 WOOD STREET
LOCATED IN THE SOUTHWEST QUARTER OF SECTION 2. TOWNSHIP 7 NORTH, RANGE 69 WEST OF THE 61h P.M.
COUNTY OF LARIMER. STATE OF COLORADO
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ENGINEERING
912 Wood Street
Although the proposed fill placement by itself is not expected to impact the floodplain hydraulics, the
land owner does intended to apply for a LOMR-F with FEMA after the fill has been placed in order to
revise the mapped flood fringe. The land owner realizes that even though this will remove the
floodplain from the fill area, any future structures in this location will be required to have the lowest
floor elevation (including basements), HVAC, ductwork, electrical, and other mechanical equipment
elevated two feet above the 100-year flood elevation.
While all of the fill and excavation proposed with this Larimer County Floodplain Development Permit
resides in the FEMA regulatory Poudre River floodplain, a portion of the property also contains the
West Vine floodplain (a City of Fort Collins regulatory floodplain). Both floodplains have a defined
floodway. This permit proposes no activity within either floodway. To ensure this, both the Poudre
River and West Vine floodways will be staked in the field adjacent to the construction area to ensure
that no work occurs in the floodway.
The proposed earthwork activities described above are allowed within the FEMA regulatory 100-year
flood fringe for the Cache la Poudre River. Due to the conveyance shadow cast by the upstream trailer
park, it is not anticipated that there will be a significant change to the effective floodplain boundaries
or base flood elevations as a result of the excavations or fill. Please feel free to contact us if you have
any questions or require additional information.
Sincerely,
NORTHERN ENGINEERING SERVICES, INC.
Nicholas W. Haws, PE, LEED AP
Colorado Registration No. 39767
Aaron T. Cvar, PE
Colorado Registration No. 36271
Copies to: Eric Tracy, PE, CFM - Larimer County Engineering
Marsha Hilmes-Robinson, CFM - City of Fort Collins Floodplain Administrator
Gino Campana - Sidehill Investment LLC
Attachments:
Floodplain Exhibit
References:
1. Federal Emergency Management Agency (FEMA), Flood Insurance Study for Larimer County, Colorado and
Incorporated Areas. Volumes 1-4, Flood Insurance Study Number 08069CV0OIB (2008).
2. FEMA, National Flood Insurance Program (NFIP) Floodplain Management Requirements: A Study Guide
and Desk Reference for Local Officials. FEMA 480 (2005).
3. Hydrologic Engineering Center (HEC), HEC-RAS River Analysis System; Hydraulic Reference Manual.
Prepared for the U.S. Army Corps of Engineers, Version 4.1, CPD-69 (2010).
Larimer County floodplain Developmr Permit 3
NORTHERN
ENGINEERING
912 Wood Street
The Hydrologic Engineering Center (HEC) of the U.S. Army Corps of Engineers (USACE) defines
ineffective flow areas as, "...areas of the cross section that will contain water that is not actively
being conveyed. Ineffective flow areas are often used to describe portions of a cross section in which
water will pond, but the velocity of that water, in the downstream direction, is close to zero. This
water is included in the storage calculations and other wetted cross section parameters, but is not
included as part of the active flow area. When using ineffective flow areas, no additional wetted
perimeter is added to the active flow areas." (HEC 2010)
Ineffective
m
Ineffective Area
Limits of Flood PIsIn
Figure 1 — Example of where ineffective flow areas are often located within a typical floodplain
(HEC 2010)
Since ineffective flow areas do not actively convey water in the principal downstream direction in a
steady-state hydraulic analysis, activities initiated in these areas will not be shown to cause any
change to water surface elevation, flood volumes, or flood flow velocities in a hydraulic analysis.
Therefore, the ground topography can be modified and other flood flow obstructions can be established
in ineffective flow areas without raising the water surface elevation, and without forcing water onto
upstream, downstream or adjacent neighboring properties and infrastructure. By definition, fill can be
placed in such ineffective flow areas without obstructing any further conveyance and without changing
the base flood elevation (BFE), flow velocities, or floodplain boundaries.
As stated above, the area being filled with this Floodplain Development Permit was excavated by the
previous land owner for the purposes of selling gravel. The depression shows up as flood fringe on the
current floodplain mapping because the date of the aerial topography was after the area was sourced
for gravel. In fact, it somewhat resides in the conveyance shadow of the existing trailer park, which is
located upstream to the west/northwest at a higher elevation.
Larimer County Floodplain Development Permit 2
W INORTHERN
ENGINEERING
ADDRESS: PHONE:970.221.4158 200 S. College Ave. Suite 10 WEBSITE:
WEBSIrthernengineering.com
Fort Collins, CO 80524 FAX: 970.221.4159
Larimer County Floodplain Development Permit — Supplemental Memorandum
Date: November 1, 2011
Address: 912 Wood Street
This memorandum and attached exhibit are intended to supplement the application to obtain a Larimer
County Floodplain Development Permit for earthwork activities within the FEMA regulatory Cache la
Poudre floodplain. The subject property is located at the terminus of Wood Street approximately a
quarter -mile north of the City of Fort Collins Utility Service Center. The site is owned by Sidehill
Investment LLC.
The land owner wishes to perform minor excavation on a portion of the property, noted as "Excavation
Area" on the attached exhibit. The land owner also proposes to fill a portion of the property, noted as
"Fill Area" on the attached exhibit. The proposed fill area was previously mined for gravel and the
intent is to restore the ground to more closely match its historic condition.
There are actually two excavation areas; both of which are located outside of the Cache la Poudre 6-
inch floodway, and are within the 100-year flood fringe of the Poudre River. The first excavation will
remove a berm of concrete rubble (Excavation Area 1). Said berm is not currently recognized by the
floodplain modeling; therefore, there will be no change to the effective floodplain boundaries. The
second excavation area will expand a small pond in the southeast corner of the property. The pond
excavation is located in an ineffective flow area, and there will be no impact to the floodplain boundary
or base flood elevations as a result of the proposed excavation. Please note, the "bubble area" shown
for the pond expansion (Excavation Area 2) is conceptual only. The exact limits are to be determined
in the field with input from the City of Fort Collins Environmental Planner. The objective is to create an
organic, natural perimeter and to preserve existing trees along the shoreline.
The fill area is located entirely outside of the Cache la Poudre 6-inch floodway, and is within the 100-
year flood fringe of the Poudre River. The fill area is also located outside the limits of the existing
septic cleanout and leach field. The fill will be placed in two phases, as shown on the Floodplain
Exhibit. Phase 1 contains the majority of the fill area. The work for this phase can proceed
immediately without impact to any of the existing trailer homes or access road. Phase 2 is the
northwestern -most portion of the fill area. Fill in this area will not be placed until the respective
structures have been removed and alternative access has been provided. Said removals and
reconfigured access are expected to take place concurrent with the fill placement for Phase 1 thereby
enabling Phase 2 earthwork will follow immediately after Phase 1. Therefore, it really is more of a
construction sequencing issue, and not necessarily separate phases with significant gaps in
construction. Both "phases" of fill placement are requested under the same permit.
The proposed fill location is within a backwater area that does not convey water in the principal
downstream flood flow direction. In other words, the fill will be placed in an ineffective flow area.
Proposal Review Checklist
>� Site development plans are complete and depict flood hazard data
!A Engineering data is provided for proposed map and floodway revisions
F000dway certificate and data document no increase in flood heights
N,A Subdivision proposals minimize flood damage and protect utilities
N/p Lowest floor elevations are at or above the 100 year base flood elevation
Mid Manufactured homes address elevation and anchoring requirements
_44&_ A flood proofing certificate has been submitted
Other:,ZS,rto QiF,nu PLOM-W t3yQoajktr-xa eW,,nre�F)z„vc
Permit Action and Compliance Documentation
✓ Permit Approved : The proposed project was reviewed and is in compliance with flood plain
management standards as established by FEMA and Larimer County
Permit Denied : The project was denied and information is in Flood Review Board files
Variance Granted : A variance to the 100 year base flood elevation was granted and
information is in Flood Review Board files
Variance Granted : A variance was granted from the Code for all or part of the 18 inch lowest
floor protection elevation
Elevation Certificate : A certificate was returned before a certificate of occupancy was issued
Flood Proofing Certificate : Certification was returned before a certificate of occupancy was
issued
(�Xountofood Plain Official's Signature Date
Comments: Wa,ak -M,�� OI6Prclyp As Px16)E 3E nN 114E ATTAr-kj" IOW
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Flood Plain Development Permit
Permit Number / /- FpC.uS Date 4 /
Owner_5iofinul. iQyesp*,1c"J L.L,C- Phone 470-ZZ9-V?a)
Address 9/f Wwo sTkc2Tt ^Ar /aujAo
Contractor ArtN: vo A^pANA Phone 970-u9-S7?W
Address_ 3'7d7- Ave M eoi
Project Address/Location 91P 6,uW0 S7xc%2; mr- 1G&,wAJ
Project Description
Single Family Residence
New Construction
Channelization
X Fill
Multi -Family Residence
Improvement>50%
Bridge/Culvert
_Levee
Manufactured Home
Improvement <50%
Rehabilitation
_ Other
Commercial
Explanation: Cw_ w min pie G.wefaIw,c CA 7Hc swore ruv61- AJ .awe fir CWtW ^49 1
Flood Hazard Data
Watercourse Name_ PcueSc_
The project is in the Floodway AJO The project is in the Flood Fringe_*
The 100 year base flood elevation for the project is t/Aiva:> - S-e%7 /f?AeMa'D At-W
2.o r/ww- at •ciwsao fat
Lowest Floor Protection Elevation required add+5 feet _y/q f„�gL
Flood Proofing Elevation required N/A - fse g, Mp seo
Source Documents: Reports/Mapsused 0&0&1GO9'?7Zj -F�_FrJ 1as, P