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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5. HYDRAULIC CONSIDERATIONS

1. The channel was designed to carry _ (ets) and/or the _-year flood.

2, The design elevation in the channel based on:

o Subcritical flow
o Critical flow
o Supercritical flow
o Energy grade line

3. If there Is the potential for a hydraulic jump at the following locations, check the box(es) that apply and attach an
explanation of how the hydraulic jump is controlled without affecting the stability of the channel.

Inlet to channel? 0 Yes
Oullet of channel? 0 Yes
At Drop Structures? DYes
At Transitions? DYes
Other locations? DYes

Explanation Attached?

DYes

o No IZI N/A

6. SEDIMENT TRANSPORT CONSIDERATIONS

If there is any indication from historical records that sediment transport (including scour and deposition) can affect the 100-year
(base flood) water-surface elevations; and/or based on the stream geomorphology, vegetative cover, development of the watershed
and bank conditions, there is a potential for debris and sediment transport (including sewer and deposition) to affect the base flood
water-surface elevations, then provide the following information (Check the box If provided):

o
o
o
o

Estimated sediment load

Method used to estimate sediment transport

Method used to estimate scour and/or deposition

Method used to revise hydraulic or hydrologic analysis (model) to account for sediment transport

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I FEMA Form a 1 -agE

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Channelization Form

MT-2 Form 6 Page 2 of 2