ST0301-MP080527
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City of Coppell, Texas
Tributary G-l LOMR
Project Update Meeting
11111
Freese and Nichols
,....: c.".or
COPPELL
Tuesday, May 27, 2008
AGENDA
10:00 am
1. GOALS
a. Today's Meeting: Present results and discuss additional needs
b. Project: LOMR submittal to FEMA to reflect recent construction activities
i) Short Term
(I) Memorandum on Hydraulic Modeling
(2) Results for TranSystems and FNI Improvements as Documented
ii) Long Term
(1) Submit LOMR once Construction is Complete
II. PROJECT UPDATE
a. DFIRM Protest
b. Hydrology (Existing and Fully Developed)
c. Downstream Assessment
d. Existing Hydraulics
e. Proposed Hydraulics
III. LOMR FOR TRIBUTARY G-I
a. Existing Hydraulics
b. Proposed Hydraulics
i) Modifications to TranSystems Construction Documents
(1) From the end of the gabion channel to Bethel Road the slope is 0.14% opposed to
0.5% as in the plans
(2) Overtopping under proposed conditions starting with the 50-year storm event
c. Finished Floor Survey Needs
IV. ADDITIONAL COORDINATION
a. Existing Gabion Channel
i) 100-yr WSEL contained in gabion channel
ii) Location of local drainage issue adjacent to channel
b. Tributary G-I Erosion Concerns
i) Over 6 tps downstream of Coppell Road
ii) Extend Channel Improvements to Coppell Road
c. DFIRM Mapping
CLOSE/ADJOURN
11:00 am