FLOOD05178

• County: Jefferson
• Community: Lakewood
• Stream Name: Weaver Creek
• Basin: South Platte
• Title: CLOMR Report for Preserve at Weaver Creek HEC-2 Cross Sections 24+30 to 42+95
• Date: 12/26/2000
• Prepared For: Fairfield Homes
• Prepared By: David Evans & Associates
• Floodplain - Doc Type: Floodplain Report/Masterplan

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FEDERAL EMERGENCY MANAGEMENT AGENCY
RIVERINE HYDRAULIC ANALYSIS
PUBLIC BURDEN DISCLOSURE NOTICE
Public reporting burden for this form is estimated to average 2.25 hours per response. The burden estimate includes the time for
reviewing instructions, searching existing data sources, gathering and maintaining the needed data, and completing and reviewing the
form, Send comments regarding the accuracy of the burden estimate and any suggestions for reducing this burden to: Information
Collections Management, Federal Emergency Management Agency, 500 C Street, SW., Washington DC 20472; and to the Office of
Mana ement and Bud et, Pa erwork Reduction Pro'ect 3067-0148 ,Washin ton, DC 20503.
You are not required to respond to this collection of information unlese a valid OMS Control Number Is displayed In the upper right comer of
this form.

O.M.B No. 3067-0148
Expires ril30, 2001

Note: Fill out one form for each noodin SOUf'CfI studied
Community Name: Jefferson Countv

Flooding Source: Weaver Creek

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1. REACH TO BE REVISED

I Describe the limits of the revision OR submit a copy of the FIRM with the revision area clearly highlighted.
Copy of FIRM(s) attached depicting area of the revision (highlighted, or circled)? 181 Yes

Project Name/Identifier: Preserve at Weaver Creek

Downstream Limit: Station 2430

I Upstream Limit: Station 4295

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2. MODELS SUBMITTED

for areas which do not have detailed
f1oodlna:
Only the 100-year (Base) flood profile is
required. A hydraulic model is not required for
areas which do not have detailed flooding;
however, BFEs may not be added to the
revised FIRM. If a hydraulic model is developed
for the area, items 3 and 4 described below
I must be submitted.
If hydraulic models are not developed, hydraulic analyses (including all calculations) for existing or pre-proJect condRlons
and revised or ost ro'ect conditions must be submitted.
1. Dualicate Effective Madel Natural File Name _ Floodway File Name Studv1981
I Copies of the hydraulic analysis used in the effective FIS, referred to as the effective models (10-, 50-, 100-, and 500-year multi-profile
runs and the floodway run) must be obtained and then reproduced on the requester's equipment to produce the Duplicate Effective
model. This is required to assure that the effective models input data has been transferred correctly to the requester's equipment and
to assure that the revised data will be integrated into the effective data to provide a continuous FIS model upstream and downstream
I of the revised reach.

Reauirements: for areas which have detailed f1oodina:
Full input and output listings along with fiies on diskette for each of the models
listed below (items 1-4) and a summary of the source of input parameters used in
the models must be provided. The summary must include a description of any
changes made from model to model (e.g., Duplicate Effective model to Corrected
Effective model). At a minimum, the Duplicate Effective (item 1) and the Revised or
Post-Project Conditions (item 4) models must be submitted. See instructions for
directions on when other models may be required.

2. Corrected Effective Mode' 0 Natural File Name _ 0 Floodway File Name
The Corrected Effective model is the model that corrects any errors that occur in the Duplicate Effective model, adds any additional
I cross sections to the Duplicate Effective model, or incorporates more detailed topographic information than that used in the currenUy
effective model. The Corrected Effective model must not reflect any man-made phYSical changes since the date of the effective model.
An error could be a technical error in the modeling procedures, or any construction in the floodplain that occurred prior to the date of
the effective model but was not incorporated into the effective model.

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3. Exlstina or Pre-Proiect Conditions Model 0 Natural File Name _ 181 Floodway File Name Exisl1999
The Duplicate Effective model or Corrective Effective model is modified to produce the Existing or Pre-Project Conditions model to
I reflect any modifications that have occurred within the floodplain since the date of the Effective model but prior to the construction of
the project for which the revision is being requested. If no modification has occurred since the date of the effective model, then this
model would be identical to the Corrected Effective model or Duplicate Effective model.

4. Revised or Post-Prolect Conditions Model 0 Natural File Name _ 181 Floodway File Name Proo2000
The Existing or Pre-Project Conditions model (or Duplicate Effective model or Corrected Effective model, as appropriate) is revised to
reflect revised or post-project conditions. This model must incorporate any physical changes to the floodplain since the effective model
was produced as well as the effects of the project. When the request is for the proposed project this model must reflect proposed
conditions.

5. Other - Please attach a sheet describing all other models submitted along with the file names. 0 Natural 0 Floodway

PLEASE REFER TO THE INSTRUCTIONS FOR THE APPROPRIATE MAILING ADDRESS

FEMA Form 81-89C

Riverine Hydraulic Analysis Form

MT -2 Form 4 Page 1 of 2

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