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Washington, D.C. 20472
CERTIFIED MAIL IN REPLY REFER TO:
RETURN RECEIPT REQUESTED Case No.: 96-08-198P
The Honorable Victor F. Smith Community: Town of Erie, Cad-Ado
Mayor, Town of Erie Community No.: 080181 =
P.O. Box 100 Panel Affected: 0001 D
Erie, Colorado 80516 Effective Date of
This Revision: MAY 24 1996
102-1-A-C
Dear Mayor Smith:
This is in response to a request for a revision to the effective Flood Insurance Study (FIS) and National
Flood Insurance Program (NFIP) map for your community. Specifically, this responds to a letter dated
April 4, 1996, from Mr. David P. Krickbaum, P.E., Project Manager, WRC Engineering, Inc., regarding
the effective FIS report and Flood Insurance Rate Map (FIRM) for the Town of Erie, Colorado.
Mr. Krickbaum requested that the Federal Emergency Management Agency (FEMA) revise the effective
FIRM to show the effects of the construction of levees and channelization along Coal Creek from
approximately 3,600 feet downstream of the Union Pacific Railroad (UPRR) to approximately 600 feet
upstream of the UPRR.
All data required to complete our review of this request were submitted with Mr. Krickbaum's April 4
letter. Because this Letter of Map Revision (LOMR) shows the effects of a publicly sponsored flood-
control project that reduces flooding to existing development, fees were not assessed for the review.
We have completed our review of the submitted data and the flood data shown on the effective FIRM,
and have revised the FIRM to modify the elevations, tloodplain and floodway boundary delineations, and
zone designations of a flood having a I-percent chance of being equaled or exceeded in any given year
(base flood) along Coal Creek from approximately 5,700 feet downstream of the UPRR to the UPRR, at
the corporate limits of the Town of Erie.
As a result of this project, the base flood and floodway are contained within the channel from
approximately 2,750 feet downstream of the UPRR to the UPRR. The flooding associated with the West
Line Overflow through the Town has been eliminated. The width of the Special Flood Hazard Area
(SFHA), the area inundated by the base flood, decreased along the entire revised reach. The maximum
decrease in SFHA width, approximately 1,300 feet, occurred approximately 1,000 feet downstream of
the UPRR. The base flood elevations (BFEs)decreased along the revised reach. The maximum decrease
in BFE, approximately 2.2 feet, occurred approximately 600 feet downstream of the UPRR.
The results of an interior drainage analysis show that local runoff from the Town will pond in a low area
along Lower Boulder Ditch. That ponded area is bounded to the west by Holbrook Street, to the south
by Cheesman Street, and to the east by Kattel Street.
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2
The modifications are shown on the enclosed annotated copies of FIRM Panel 0001 D, Profile Panel 01P,
and the Floodway Data Table for Coal Creek. This LOMR hereby revises this panel of the effective
FIRM and the Flood Profile and Floodway Data Table in the FIS report. both dated September 28, 1990.
The following table is a partial listing of existing and modified BFEs:
Existing BFE Modified BFE
Location (feet)* (feet)*
Coal Creek:
Approximately 900 feet downstream of Briggs Street 5,006 5,006
Approximately 600 feet downstream of LIPRR 5,021 5,019
At UPRR 5,022 5,021
*Referenced to the National Geodetic Vertical Datum, rounded to the nearest whole foot
Public notification of the revised BFEs will be given in the Longmont Daily Times-Call on or about
June 12 and June 19, 1996. A copy of this notification is enclosed. Any request for reconsideration must
be based on scientific or technical data. In addition, a notice of changes will be published in the Federal
Register.
Because this LOMR will not be printed and distributed to primary users, such as local insurance agents
and mortgage lenders, your community will serve as a repository for these new data. We encourage you
to disseminate the information reflected by this LOMR throughout the community, so that interested
persons, such as property owners, local insurance agents, and mortgage lenders, may benefit from the
information. We also encourage you to prepare a related article for publication in your community's local
newspaper. This article should describe the assistance that officials of your community will give to
interested persons by providing these data and interpreting the NFIP maps.
Based on the modifications described above, the existing structures at 280 Evans Street, 365 Evans Street,
795 Briggs Street, 123 Cheesman Street, and 750 Pierce Street as shown on the topographic work map
entitled "Figure 4 - Sheet 6A of 6," prepared by WRC Engineering, Inc., dated May 1995, would not
be inundated by the base flood and are outside the SFHA. The structures are in Zone X (shaded), an area
of moderate flooding outside the SFHA.
If any current flood insurance policy issued under the NFIP covers a structure on this property and that
policy was required by the mortgage company in conjunction with Federal flood insurance requirements,
then flood insurance coverage is no longer required under the NFIP.
Accordingly, if a lender imposed the flood insurance requirement, that lender will have to determine
whether or not to continue that requirement. The lender may determine, as a business decision, that it
wishes to continue the flood insurance requirement in order to protect its collateral security on the loan.
If the lender decides to release the borrower from the flood insurance requirement, and the insured
decides to cancel the policy and seek a refund for the current policy year, the insured must obtain a
written waiver of the flood insurance requirement from the lender to provide to the property insurance
agent or company that is servicing their policy. The agent or company will then process the refund
request for the insured.
3
Even though these structures are not included in an SFHA, they could be inundated by a flooding event
of greater magnitude than the base tlood. In fact, more than 25 percent of all losses in the NFIP occur
to structures located outside the SFHA in Zones B, C, or X. More than 25 percent of all policies
purchased under the NFIP protect structures located in these zones. This clearly illustrates that there is
a risk of flooding in non-SFHAs. That risk is just not as great as the flood risk to structures located in
SFHAs. To offer flood insurance protection to owners of such structures, the NFIP offers two types of
flood insurance. Property owners should discuss their individual flood risk situation and insurance needs
with their insurance agent or company before making a final decision regarding flood insurance coverage.
The revisions are effective as of the date of this letter; however, within 90 days of the second publication
in the Longmont Daily Times-Call, a citizen may request that FEMA reconsider the determination made
by this LOMR. Any request for reconsideration must be based on scientific or technical data. All
interested parties are on notice that,until the 90-day period elapses, the determination to modify the BFEs
presented in this LOMR may itself be modified.
Due to present funding constraints, we must limit the number of physical map revisions processed.
Consequently, we will not republish the FIRM and FIS report for your community to reflect the
modifications described in this LOMR at this time. However, when changes to FIRM Panel 0001 D and
the FIS report for your community warrant a physical revision and republication in the future, we will
incorporate the modifications described in this LOMR at that time.
The floodway is provided to your community as a tool to regulate tloodplain development. Therefore,
the floodway modifications described in this letter, while acceptable to FEMA, must also be acceptable
to your community and adopted by appropriate community action, as specified in Paragraph 60.3(d) of
the NFIP regulations.
A separate LOMR was issued on the same date as this LOMR to describe the effects of this project on
the unincorporated areas of Weld County, Colorado.
This response to Mr. Krickbaum's request is based on minimum floodplain management criteria
established under the NFIP. Your community is responsible for approving all tloodplain development,
including this request, and for ensuring that necessary permits required by Federal or State law have been
received. With knowledge of local conditions and in the interest of safety, State and community officials
may set higher standards for construction, or may limit development in floodplain areas. If the State of
Colorado or your community has adopted more restrictive or comprehensive floodplain management
criteria, these criteria take precedence.
The basis of this LOMR is, in whole or in part, a channel-modification/culvert project. NFIP regulations,
as cited in Paragraph 60.3(b)(7), require that communities assure 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 regulations. Consequently, the ultimate responsibility for
maintenance of the channel modification/culvert rests with your community.
The map panel as listed above and as revised by this letter will be used for all flood insurance policies
and renewals issued for your community.
4
This determination has been made pursuant to Section 206 of the Flood Disaster Protection Act of 1973
(Public Law 93-234) and is in accordance with the National Flood Insurance Act of 1968, as amended
(Title XIII of the Housing and Urban Development Act of 1968, Public Law 90-448), 42 U.S.C. 4001-
4128, and 44 CFR Part 65. Pursuant to Section 1361 of the National Flood Insurance Act of 1968, as
amended, communities participating in the NFIP are required to adopt and enforce floodplain management
regulations that meet or exceed minimum NFIP criteria. These criteria are the minimum and do not
supersede any State or local requirements of a more stringent nature. This includes adoption of the
effective FIRM to which the regulations apply and the modifications described in this LOMR. Our
records show that your community has met this requirement.
A Consultation Coordination Officer (CCO) has been designated to assist your community. The CCO
will be the primary liaison between your community and FEMA. For information regarding your CCO,
please contact:
Mr. Steve L. Olsen
Director, Mitigation Division
Federal Emergency Management Agency, Region VIII
Denver Federal Center, Building 710, Box 25267
Denver, Colorado 80225-0267
(303) 235-4830
If you have any questions regarding floodplain management regulations for your community or the NFIP
in general, please contact the CCO for your community at the telephone number cited above. If you have
any technical questions regarding this LOMR, please contact Mr. John Magnotti of our staff in
Washington, DC, either by telephone at (202) 646-3932 or by facsimile at (202) 646-4596.
Sincerely,
ichael . ckle , .E., Chief
c...-Hazard Identification Branch
Mitigation Directorate
Enclosures
cc: The Honorable Barbara J. Kirkmeyer
Chair, Weld County
Board of Commissioners
Mr. David P. Krickbaum, P.E.
Project Manager
WRC Engineering, Inc.
CHANGES ARE MADE IN DETERMINATIONS OF BASE FLOOD ELEVATIONS FOR THE TOWN
OF ERIE, BOULDER AND WELD COUNTIES, COLORADO, UNDER THE NATIONAL FLOOD
INSURANCE PROGRAM
On September 28, 1990, the Federal Emergency Management Agency (FEMA) identified Special
Flood Hazard Areas (SFHAs) in the Town of Erie, Boulder and Weld Counties, Colorado, through
issuance of a Flood Insurance Rate Map (FIRM).
The Mitigation Directorate has determined that modification of the elevations of the flood having
a 1-percent chance of being equaled or exceeded in any given year (base flood) for certain locations in
the Town of Erie is appropriate. The modified base flood elevations (BFEs) revise the FEMA FIRM for
the community.
The changes are being made pursuant to Section 206 of the Flood Disaster Protection Act of 1973
(Public Law 93-234) and are in accordance with the National Flood Insurance Act of 1968, as amended
(Title XIII of the Housing and Urban Development Act of 1968, Public Law 90-448), 42 U.S.C. 4001-
4128, and 44 CFR Part 65.
A hydraulic analysis was performed to incorporate the effects of construction of levees and
channelization along Coal Creek, and has resulted in a revised delineation of the regulatory floodway, a
reduction in SFHA, and lower BFEs from approximately 4,700 feet downstream of Perry Street to Perry
Street, which is approximately 450 feet downstream of the Union Pacific Railroad (UPRR). The
aforementioned channelized portion of Coal Creek contains the base flood. The table below indicates the
modified BFEs for several locations along the affected length of Coal Creek.
2
Existing BFE Modified BFE
Location (feet)* (feet)*
Approximately 900 feet downstream of Briggs Street 5,006 5,006
Approximately 600 feet downstream of UPRR 5,021 5,019
At UPRR 5,022 5,021
*National Geodetic Vertical Datum, rounded to nearest whole foot
Under the above-mentioned Acts of 1968 and 1973, the Mitigation Directorate must develop
criteria for floodplain management. For the community to participate in the National Flood Insurance
Program (NFIP), the community must use the modified BFEs to administer the floodplain management
measures of the NFIP. These modified BFEs will also be used to calculate the appropriate flood
insurance premium rates for new buildings and their contents and for the second layer of insurance on
existing buildings and contents.
Upon the second publication of notice of these changes in this newspaper, any person has 90 days
in which he or she can request, through the Chief Executive Officer of the community,that the Mitigation
Directorate reconsider the determination. Any request for reconsideration must be based on knowledge
of changed conditions or new scientific or technical data. All interested parties are on notice that until
the 90-day period elapses, the Mitigation Directorate's determination to modify the BFEs may itself be
changed.
Any person having knowledge or wishing to comment on these changes should immediately notify:
The Honorable Victor F. Smith
Mayor, Town of Erie
P.O. Box 100
Erie, Colorado 80516
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