Thompson, Johnny-CS 900323 ~CON$IJLTING 'ENGINE~IS, INC.
Mr. Johnny Thompson
P.O. Box 1236
Ooppell, Texas 75019
Re: Elm Fork Property
NDM No.: 89-03-037
Dear Johnny:
I am writing this letter to discuss some of the floodplain issues that relate to your property on the Elm
Fork of the Trinity River in Coppell.
The floodplain line we showed on the topographic survey of your prope~y is consistent with the most
current 100-year water surface elevations from FEMA. This is from their analyisis based on the existing
discharge and cross sections.
If the cross sectidns used in this study reflected the topography as it exists today on your property, any
new fill or improvements put behind that line would have no effect on a flood of magnitude equal to or
less than what was contemplated in the FEMA study.
However, a flood of greater magnitude would result in a higher water surface elevation. This would
increase the floodplain width. Any improvements or fill within this widened floodplain would become an
encroachment and raise the water surface elevation for that particular flood event.
I hope this is helpful to you. If you have any questions, please let us know.
Sincerely,
NATHAN D. MAIER
CONSUI.,TII~ ENGINEERS, INC.
Mike Daniel, P.E.
CMD/rdp
Three NorthPark/8800 N. Central Expwl;./SuJte 300/Dallas, Texas 75231/(214) 739-4741