HomeMy WebLinkAboutPrelim Stormwater ReportP'reliminary Stormwater Report
Congressi. onal
Flex Space
Project No. 122-0t 46
Prepared By:
Mid-States Engineering
970 Logan Street, SuRe 202
Noblesville, IN 46060
October 17, 2003
Table of Contents
Introduction
Pre-DeveloPed Conditions. Summary
Post-Developed Conditions
Location Map
Soil Map
Drainage Maps for StOrm Sewer Design- Areas Delineation
Introduction
This report details the proposed drainage for the Congressional Flex Space site locatedat
the southwest comer, at the intersection of 122~ Street and Congressional Boulevard,
specifically part of the southeast quarter of Section 32, Township 19 N, Range 5 E, in
Hamilton County, Indiana.
Existing Conditions
The proposed site is approximately 4.02-acte and is currently undeveloped. A soils map
from United States Department of Agriculture Soil Conservation Service identifies the
site as Miami Silt Foam (MmB2), Brookston (Br), and Crosby (CRA) soils, and this
information is included in the report. The proposed site is surrounded by commercial
buildings. At the existing conditions, the onsite ston~ water sheet flow from a high point
northerly to the existing swale along 122~a Street and discharge to the existing 15-inch
RCP, which ultimately discharge to a detention pond. In addition, part of the storm runoff
will sheet flow from the high point southeasterly to the swale and discharge to a detention
pond through a 15-inch RCP at the southwest corner of the site as shown on the existing
drainage map included in this report. There will be approximately 0.53-acre offsite
drainage affecting the site.
Post-Developed Conditions
The proposed Congressional Flex Space site consists of two buildings and parking lots.
There is approximately of 78% of impervious area at the post-developed conditions. The
design of the storm water drainage system follows approximately the same path as the
pre-developed conditions through the storm pipe directing the storm water to the existing
15-inch RCP on the north and southwest corner of the site.
Mid-State'~ ~-~gineering, L.L.C.
STORM DR /DW TABULATION FORM
PROJECT NAb'I~ CONGRESSIONAL FLEX SPACE
STO~ ~QU~NCY D~SIGN ~
DKSC~ION POST-DEVELOPeD CONSITIONS
PROJECT No. 122-0146
COMPUTED BY:
CHECKED BY:'
LIS
, , CALCULATED I D E'S I G N
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AREA CA CA CIA SIZE SLOPE V~L. LGTIt ~ SLOPE ' all flow f~ flow :I~. I~. IN [ TC~ [ FROM [ TO
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10/17/2003 12:56 PM Page 1 of 1 122-0146 storm sewer