2006-08-02_PERMIT FILE - C1980007 ‎(8)‎

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 8/2/2006
• Doc Name: Hydrologic/Hydraulic Analysis for Roadway Drainage
• Section_Exhibit Name: Exhibit 75 SGARE Appendix G Report to Appendix E
• Media Type: D
• Archive: No

Sedimentation Detail
• One of the advantages by using SEDCAD~4 to model a storm drain system is that sediments
caused by the storm runoff can be predicted with the hydrologic modeling. Sediment load, peak
sediment concentration and peak settleable concentration are portions of the model output and are
summarized in Table 7.
Table 7Sub-Watershed Sedimentation
•
C~
Sub-Watershed Sub-Outlet Sediment Accumulated
Sediment eak Sediment
Concentration Peak Settleable
Concentration
[-] [Station] [tons] [tons] [m ] [ml/1]
1-1 166+50 463.0
1
402
4 167,616 0.01
1-2 166+50 939.5 ,
. 163,914 0.00
2-I 149+35 321.0
961
1
3 230,585 0.03
2-1 149+35 237.8 ,
. 208,025 0.64
4-1 145+10 595.0 2,556.3 473,491 1.63
5-1 142+15 95.2 2,651.4 207,080 2.75
6-1 132+40 117.7
2
843
6 219,185 6.25
6-2 132+40 74.4 ,
. 404,440 55.42
8-1 128+27 1,537.2 4,380.8 490,570 0.05
9-1 124+05 326.6 4,706.8 834,081 114.30
10-1 122+15 109.6 4,816.4 545,002 46.52
13-1 119+10 204.0 5,020.4 108,435 0.11
15-1 110+80 299.1 5,319.5 344,000 1.25
17-1 105+00 266.2 5,585.6 511,520 29.26
18-1 95+80 542.8 6,128.4 678,445 65.04
19-1 95+00 421.9
136
3
7 365,123 2.11
19-2 95+00 306.5 .
. 226,835 1.98
20-1 95+00 279.5 7,136.3 372,171 6.59
21-1 84+10 266.8 7 627 412,560 3.40
21-2 84+10 224.6 6 624,072 85.52
3.0 HYDRAULICS
3.1 Methodology
HYDRA is a storm drain and sanitary sewer analysis and design program For the Sylvester
Gulch Access roadway drainage design, HI'DRA was used to perform analyses on the
preliminarily designed pipe-manhole system (trunk lines) between the stations 132+40 and
149+35, although the program could also be used to select pipe size, slope, and invert elevations
if given certain design criteria. The purpose of this analysis is to check /verify the storm drain
design and provide hydraulic data for the trunk line pipes and manholes. When a designed system
is overloaded, HYDRA will indicate suggested flow removal quantities as well as an increased
pipe size as an alternative remedy.
Hydraulic analyses were also conducted to obtain velocities at the culvert outlets and at some
potential critical sections to provide data for channel protection design.
Sunrise Engineering, Inc.
Sylvester Gulch Access Road
Hydrologic /Hydraulic Analyses for Roadway Drainage