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FW Permit Application - City of Blair US Hwy 30 13th (US Hwy 75).txt
From: Don sock [dsock @oaconsulting.com]
sent: Monday, August 06, 2007 8:23 AM
To: Allen Schoemaker
subject: FW: Permit Application - City of Blair, Us Hwy 30 & 13th (us
Hwy 75)
FYI
- -- original Message---- -
From: jean Hamilton [ mailto :jhamilto@dor.state.ne.us]
sent: Monday, August 06, 2007 7:25 AM
To: Don Sock
Cc: Laura Lenzen; Mike Owen; Bob carnazzo
subject: Permit Application - City of Blair, Us Hwy 30 & 13th (US Hwy
75)
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Don,
We are in the process of reviewing the above mentioned permit
application.
We are sending the "Hydraulic Comments" so that you can start working on
the resolution. We are conducting other reviews and will send comments
as
we receive them.
I
Hydraulic Comments:
our Hydraulics Engineer has significant experience with the storm sewer
in
this location. The storm sewer system west of the manhole at the middle
Of
13th street is at capacity. To the east of the 13th street manhole the
system increases to a 48" storm sewer that is significantly under
utilized
now that the 13th street (US Hwy 75) system south of US Hwy 30 has been
rerouted. our Hydraulics Engineer recommends that the storm sewer be
redesigned to connect into our system east of 13th street
The designer should be made aware that the sewer at the manhole and for
60 -70 feet to the east is a concrete box culvert (old rail road
structure)
that then flows in to a 48" pipe.
our Hydraulics Engineer recommends that the applicant submit drainage
data
for the storm sewer system. Approval is dependent on these
calculations.
The system along Us Hwy 30 was designed to collect and convey only
highway
runoff. Even though the 48" sewer system is under utilized, it leads to
the 12th street storm sewer system that.drains US Hwy 75 (13th street
south
of Us Hwy 30) and which is at capacity. if the applicant has knowledge
that the adjacent developments (Walgreens and strip Mall) wish to
discharge
storm water to the highway, then our Hydraulics Engineer would like to
review these plans, and their drainage calculations, in conjunction with
the 13th street plans.
if you have any questions, please do not hesitate to call.
Thank you,
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