Sandy Knoll and Vanbebber drainage studiesGentlemen,
For your review are attached the revised drainage analysis of Sandy
Knoll and Vanbebber Road projects.
The Sandy Knoll street flow and inlet calculations show a maximum
street depth over top of curb of 0.10 feet. This depth can be contained
in the R.O.W.
Included is an analysis of the existing storm drain line in Sandy Knoll
that includes the two new inlets to be constructed in Willow Springs
Drive. Computation sheet HGL#1 indicates the existing line inadequate
to carry the addition inlets and that all three inlets at the Willow
Spring/Sandy Knoll intersection will surcharge. Beginning HGL was taken
from record plans and no inlets were added in Shadowcrest Lane. A
change in either would alter the results.
If it is desired to keep the inlets from surcharging the existing pipe
may be increased as shown in computation sheet HGL#2.
Estimated construction costs to upsize the line are as follows:
425 LF remove & dispose existing RCP at $10/ft
280 LF install 24" RCP at $62/ft
145 LF install 30" RCP at $70/ft
Total estimated construction cost $32,000
Vanbebber Drive was changed to a 34' back-to-back street. Calculations
show top of curb overtopped at several inlets, with the maximum being
0.15 feet (inlet #6 will be replaced with a 10’ inlet). This depth can
also be contained in the R.O.W.
Please contact me if you have any questions or comments.
Thanks,
Louis
LOUIS HUND, PE
SENIOR PROJECT MANAGER
2105 COMMERCE STREET, SUITE 200, DALLAS, TEXAS 75201
214 623.5866 PHONE 817 707.3131 CELL
JQENG.COM
ZWEIG WHITE HOT FIRM
2009, 2008, 2007
ZWEIG WHITE BEST FIRM
2009, 2008, 2007
The information in this e-mail is confidential and may be legally
privileged. It is intended solely for the addressee. Access by any other
person to this e-mail is not authorized. If you are not the intended
recipient, please delete this e-mail. Any disclosure of this e-mail or
of the parties to it, any copying, distribution, or any action taken or
omitted in reliance on it is prohibited, and may be unlawful.