HomeMy WebLinkAbout20160839 Ver 2_15-04-7582R-370238-104_20190515Page 1 of 5
Issue Date: December 11, 2015
Case No.: 15-04-7582R
CLOMR-APP
Federal Emergency Management Agency
Washington, D.C. 20472
LAND SEA'
CONDITIONAL LETTER OF MAP REVISION
COMMENT DOCUMENT
COMMUNITY INFORMATION
PROPOSED PROJECT DESCRIPTION
BASIS OF CONDITIONAL REQUEST
Town of Cary
BRIDGE
HYDRAULIC ANALYSIS
Wake County
FILL
UPDATED TOPOGRAPHIC DATA
North Carolina
FLOODWAY
COMMUNITY
COMMUNITY NO.: 370238
NC-15-477 — Proposed Greenway and Pedestrian Crossing at
APPROXIMATE LATITUDE & LONGITUDE: 35.816, -78.9
IDENTIFIER
Panther Creek
SOURCE: FIRM Panel DATUM: NAD 83
AFFECTED MAP PANELS
TYPE: FIRM' NO.: 3720072500K DATE: February 2, 2007
FIRM - Flood Insurance Rate Map
TYPE: FIRM' NO.: 3720073500J DATE: May 2, 2006
FLOODING SOURCE(S) AND REACH DESCRIPTION See Page 2 for Additional Flooding Sources
Panther Creek (Basin 29, Stream 1) — from a point just downstream of Green Level To Durham Road to a point approximately 1,500 feet upstream of NC-540
PROPOSED PROJECT DESCRIPTION
Flooding Source Proposed Project Location of Proposed Project
Panther Creek (Basin 29, Stream 1) Fill Just upstream of Green Level To Durham Road
New Bridge At a point approximately 850 feet upstream of Green Level To Durham
Road
SUMMARY OF IMPACTS TO FLOOD HAZARD DATA
Flooding Source Effective Flooding Proposed Flooding Increases Decreases
Panther Creek (Basin 29, Stream 1) BFEs` BFEs Yes Yes
Zone AE Zone AE Yes Yes
Floodway Floodway Yes Yes
Zone X (shaded) Zone X (shaded) Yes Yes
BFEs - Base (1-percent-annual-chance) Flood Elevations
COMMENT
This document provides the Federal Emergency Management Agency's (FEMA's) comment regarding a request for a CLOMR for the project described above. This
document is not a final determination; it only provides our comment on the proposed project in relation to the flood hazard information shown on the effective
National Flood Insurance Program (NFIP) map. We reviewed the submitted data and the data used to prepare the effective flood hazard information for your
community and determined that the proposed project meets the minimum floodplain management criteria of the NFIP. Your community is responsible for approving
all floodplain development and for ensuring that all permits required by Federal or State/Commonwealth law have been received. State/Commonwealth, county,
and community officials, based on their knowledge of local conditions and in the interest of safety, may set higher standards for construction in the Special Flood
Hazard Area (SFHA), the area subject to inundation by the base flood). If the State/Commonwealth, county, or community has adopted more restrictive or
comprehensive floodplain management criteria, these criteria take precedence over the minimum NFIP criteria.
This comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Map Information eXchange (FMIX) toll
free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMC Clearinghouse, 847 South Pickett Street, Alexandria, VA 22304-4605. Additional Information
about the NFIP is available on the FEMA website at http://www.fema.gov/business/nfip.
Luis Rodriguez, P.E., Chief
Engineering Management Branch
Federal Insurance and Mitigation Administration 15-04-7582R 104
Page 2 of 5
Issue Date: December 11, 2015
Case No.: 15-04-7582R
CLOMR-APP
�ti4AR14 L
J� Federal Emergency Management Agency
Washington, D.C. 20472
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CONDITIONAL LETTER OF MAP REVISION
COMMENT DOCUMENT (CONTINUED)
COMMUNITY INFORMATION
To determine the changes in flood hazards that will be caused by the proposed project, we compared the hydraulic modeling reflecting the proposed project
(referred to as the proposed conditions model) to the hydraulic modeling used to prepare the Flood Insurance Study (FIS) (referred to as the effective
model). If the effective model does not provide enough detail to evaluate the effects of the proposed project, an existing conditions model must be
developed to provide this detail. This existing conditions model is then compared to the effective model and the proposed conditions model to differentiate
the increases or decreases in flood hazards caused by more detailed modeling from the increases or decreases in flood hazards that will be caused by the
proposed project.
The table below shows the changes in the BFEs:
BFE Comparison Table
Flooding Source: Panther Creek (Basin
BFE Change (feet)
Location of maximum change
29, Stream 1)
Existing vs.
Maximum increase
4.6
at a point approximately 120 feet upstream of Green Level To Durham Road
Maximum decrease
0.4
at a point approximately 310 feet upstream of NC-540
Effective
Proposed vs.
Maximum increase
0.7
at a point approximately 850 feet upstream of Green Level To Durham Road
Maximum decrease
0.1
at a point approximately 2,050 feet upstream of Green Level To Durham Road
Existing
Proposed vs.
Maximum increase
4.6
at a point approximately 120 feet upstream of Green Level To Durham Road
Maximum decrease
0.4
at a point approximately 310 feet upstream of NC-540
Effective
Increases due to the proposed project that exceed those permitted under Paragraphs (c)(10) or (d)(3) of Section 60.3 of the NFIP regulations must adhere to
Section 65.12 of the NFIP regulations. With this request, your community has complied with all requirements of Paragraph 65.12(a) of the NFIP
regulations. Compliance with Paragraph 65.12(b) also is necessary before FEMA can issue a Letter of Map Revision when a community proposes to
permit encroachments into the effective floodplain that will cause BFE increases in excess of those permitted under Paragraph 60.3(d)(3).
NFIP regulations Subparagraph 60.3(b)(7) requires communities to ensure that the flood -carrying capacity within the altered or relocated portion of any
watercourse is maintained. This provision is incorporated into your community's existing floodplain management ordinances; therefore, responsibility for
maintenance of the altered or relocated watercourse, including any related appurtenances such as bridges, culverts, and other drainage structures, rests with
your community. We may request that your community submit a description and schedule of maintenance activities necessary to ensure this requirement.
This comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Map Information eXchange (FMIX) toll
free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMC Clearinghouse, 847 South Pickett Street, Alexandria, VA 22304-4605. Additional Information
about the NFIP is available on the FEMA website at http://www,fema.gov/business/nfip,
Luis Rodriguez, Rodriguez, P.E., Chief
Engineering Management Branch
Federal Insurance and Mitigation Administration
f 5-04-7582R 104
Page 3 of 5
Issue Date: December 11, 2015
Case No.: 15-04-7582R
CLOMR-APP
T
Z), Federal Emergency Management Agency
Washington, D.C. 20472
�l 1 ND StiGJ
CONDITIONAL LETTER OF MAP REVISION
COMMENT DOCUMENT (CONTINUED)
COMMUNITY INFORMATION (CONTINUED)
DATA REQUIRED FOR FOLLOW-UP LOMR
Upon completion of the project, your community must submit the data listed below and request that we make a final determination on
revising the effective FIRM and FIS report. If the project is built as proposed and the data below are received, a revision to the FIRM and
FIS report would be warranted.
• Detailed application and certification forms must be used for requesting final revisions to the maps. Therefore, when the map revision
request for the area covered by this letter is submitted, Form 1, entitled "Overview and Concurrence Form," must be included. A copy of
this form may be accessed at http://www.fema.gov/plan/prevent/fhm/dl_mt-2.shtm.
• The detailed application and certification forms listed below may be required if as -built conditions differ from the proposed plans. If
required, please submit new forms, which may be accessed at http://www.fema.gov/plan/prevent/fhm/dl_mt-2.shtm, or annotated copies of
the previously submitted forms showing the revised information.
Form 2, entitled "Riverine Hydrology and Hydraulics Form." Hydraulic analyses for as -built conditions of the base flood, the 10-
percent, 2-percent, and 0.2 percent annual chance floods, and the regulatory floodway must be submitted with Form 2.
Form 3, entitled "Riverine Structures Form."
• A certified topographic work map showing the revised and effective base and 0.2 percent annual chance floodplain and floodway
boundaries. Please ensure that the revised information ties in with the current effective information at the downstream and upstream ends
of the revised reach.
• An annotated copy of the FIRM, at the scale of the effective FIRM, that shows the revised base and 0.2 percent annual chance floodplain
and floodway boundary delineations shown on the submitted work map and how they tie into the base and 0.2 percent annual chance
floodplain and floodway boundary delineations shown on the current effective FIRM at the downstream and upstream ends of the revised
reach.
• As -built plans, certified by a registered Professional Engineer, of all proposed project elements.
• A copy of the public notice distributed by your community stating its intent to revise the regulatory floodway, or a signed statement by
your community that it has notified all affected property owners and affected adjacent jurisdictions.
• Documentation of the individual legal notices sent to property owners who will be affected by any widening or shifting of the base
floodplain and/or any BFE increases along Panther Creek (Basin 29, Stream 1).
This comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Map Information eXchange (FMIX) toll
free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMC Clearinghouse, 847 South Pickett Street, Alexandria, VA 22304-4605. Additional Information
about the NFIP is available on the FEMA website at http://www.fema.gov/business/nfip.
Luis Rodriguez, P.E., Chief
Engineering Management Branch
Federal Insurance and Mitigation Administration 15-04-7582R 104
Page 4 of 5
Issue Date: December 11, 2015
Case No.: 15-04-7582R
CLOMR-APP
T
Federal Emergency Management Agency
Washington, D.C. 20472
�l 1 ND StiGJ
CONDITIONAL LETTER OF MAP REVISION
COMMENT DOCUMENT (CONTINUED)
COMMUNITY INFORMATION (CONTINUED)
DATA REQUIRED FOR FOLLOW-UP LOMR (continued)
• FEMA's fee schedule for reviewing and processing requests for conditional and final modifications to published flood information and
maps may be accessed at https://www.fema.gov/forms-documents-and-software/flood-map-related-fees. The fee at the time of the map
revision submittal must be received before we can begin processing the request. Payment of this fee can be made through a check or
money order, made payable in U.S. funds to the National Flood Insurance Program, or by credit card (Visa or MasterCard only). Please
either forward the payment, along with the revision application, to the following address:
LOMC Clearinghouse
Attention: LOMR Manager
847 South Pickett Street
Alexandria, Virginia 22304-4605
or submit the LOMR using the Online LOMC portal at: https://hazards.fema.gov/femaportal/onlinelomc/signin
After receiving appropriate documentation to show that the project has been completed, FEMA will initiate a revision to the FIRM and FIS
report. Because the flood hazard information (i.e., base flood elevations, base flood depths, SFHAs, zone designations, and/or regulatory
floodways) will change as a result of the project, a 90-day appeal period will be initiated for the revision, during which community
officials and interested persons may appeal the revised flood hazard information based on scientific or technical data.
This comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Map Information eXchange (FMIX) toll
free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMC Clearinghouse, 847 South Pickett Street, Alexandria, VA 22304-4605. Additional Information
about the NFIP is available on the FEMA website at http://www.fema.gov/business/nfip.
Luis Rodriguez, P.E., Chief
Engineering Management Branch
Federal Insurance and Mitigation Administration 15-04-7582R 104
Page 5 of 5
Issue Date: December 11, 2015
Case No.: 15-04-7582R
CLOMR APP
a Federal Emergency Management Agency
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CONDITIONAL LETTER OF MAP REVISION
COMMENT DOCUMENT (CONTINUED)
COMMUNITY INFORMATION (CONTINUED)
COMMUNITY REMINDERS
We have designated a Consultation Coordination Officer (CCO) to assist your community. The CCO will be the primary liaison between
your community and FEMA. For information regarding your CCO, please contact:
Mr. Jesse Munoz
Director, Mitigation Division
Federal Emergency Management Agency, Region IV
Koger Center - Rutgers Building, 3003 Chamblee Tucker Road
Atlanta, GA 30341
(770) 220-5400
This comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Map Information eXchange (FMIX)
toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMC Clearinghouse, 847 South Pickett Street, Alexandria, VA 22304-4605. Additional
Information about the NFIP is available on the FEMA website at http://www.fema.gov/business/nfip.
Luis Rodriguez, P.E., Chief
Engineering Management Branch
Federal Insurance and Mitigation Administration 15-04-7582R 104