1. SITES WORKSHOP-Phoenix, AZ
EXAMPLE PROBLEM 378 & 410 GSS

2. SITES WORKSHOP-Phoenix, AZ
TRAINING OBJECTIVES
Be able to flood route a 378 pond and design a pond without and with a pipe.
As will be discussed in more detail shortly, SITES is a full featured software package capable of doing watershed rainfall runoff, reservoir routing, and embankment volume computations. It was developed by NRCS as their dam design software during the years when they were designing a large number of flood control structures as the Soil Conservation Service. If you aren’t already familiar with the software, we want you to leave here with an appreciation of what the software is capable of, and what it is not suitable for. We’re not going to spend a lot of time on this, but we’ll try to touch on the basics and answer questions as we go through.
The features that are unique and new in the SITES software have to do with earth auxiliary spillway rating and analysis. The technology associated with this is what we are going to focus on today. Again, we’d like for you to leave with an understanding of what it is, and what it isn’t.
There is a lot more material that we would like to cover than there is time for in a single day seminar. Our regular training session that was developed for in-house use is 2-1/2 days. This means that we’re not going to give you hands-on practice today, and you’ll need to do some additional work after you leave here if you want to take advantage of what you learn. We will, however give you a CD containing the software, a manual, and some other background resources that you can use to continue your education. The CD will also contain copies of the visuals and notes that we use in presentation today.
Questions?

3. SITES WORKSHOP-Phoenix, AZ
AUX. SPLWY.
PERM,
POOL
INLET CHANNEL
CREST AUX..
TOP DAM
EXIT CHANNEL
TAILWATER ELEV
TOP DAM-FBH +Freeboard
CREST AUX.
PERM. POOL
FBH
SDH
PSH
SITES - OVERVIEW
This sketch of SITES terminology ( page 2-2 of the user manual) shows the principal components of a NRCS structure.
The FBH, SDH, and PSH represent design hydrographs that when routed, the flood storage provides the elevations shown on the dam x-section.
For NHCP-378 criteria, the Design hydrograph is the FBH, plus a freeboard (usually 1.0 ft) is added to set the top of dam.
DESIGN FLOW (SDH)
CREST PS
CONDUIT
TAIL-
WATER
TAIL-
WATER

4. SITES WORKSHOP-Phoenix, AZ
SITES 378 PROBLEM
A. GIVEN:
Drainage Area = 103 acres Hazard Class = A1
RCN = 72
W/S length = 987’ with a slope of 2%
Auxiliary Spillway Crest=Permanent Elev feet.
No principal spillway
Valley Floor Elevation feet

5. Elev. (ft) Surface Area (Ac.) 85.5 0 89.5 0.3 96.4 1.2 100 4.8
Structure Data
Elev. (ft) Surface Area (Ac.)

6. SITES WORKSHOP-Phoenix, AZ
Rainfall: Design FBH = 8.95”
Rain distribution: Read in a 24-hr duration,
rain table
No Principal Spillway
Auxiliary Spillway located at EL.

7. SITES WORKSHOP-Phoenix, AZ
T = Total Hydraulic Stress – lb/ft2
T = Vegetal Stress + Effective Soil Stress
T = Tve +Te
Auxiliary Spillway has a CL material with PI=15
Allowable effective soil stress=0.05 lb/ft2

8. Centerline Dam Valley Profile Data: Station (ft.) /Elev. (ft.)
DAM CENTERLINE
Centerline Dam Valley Profile Data:
Station (ft.) /Elev. (ft.)
0/ / /104.3
99/ / /99.6
193/ / /96.4
283/ / /94
401/ / /96.9
491/ /107

9. Embankment Data:
Top Width = 12’
Upstream side slope = 4:1
Downstream side slope = 4:1
No Wave Berm Width
No Stability Berms
Crown = 0

10. Auxiliary Spillway Data:
We want to do a Stability & Integrity Analysis of the Spillway. You set the crest at 103.6
Station at DS end of Crest = 620
Inlet length of the auxiliary spillway is about 230 ft.
Profile or spillway inlet template data (x,y) (distance, drop):
50’/0’; 280’/3.0’
Bottom Width: 30 feet
Spillway sideslope = 3:1
Spillway slope 3% (constructed exit channel)

11. Inlet Spillway Template
280’
Tie-in Station 6+20
50’ 3’
Inlet Spillway Template
Z = 3:1
BW = 30’

12. Spillway Geology and Vegetation Data:
Material in spillway - Clay (CL)
PI or (lw) = 18
The representative soil particle size D75 = inches
Percent Clay = 28% (in material in spillway)
Dry Density of the clay = 92 pcf
Headcut Erodability Index = 0.1
Vegetative Retardance Curve Index = 5.6 (Inlet)
Vegetative Retardance Curve Index = 5.6 (Outlet)

13. Assume 2 foot (2’) of rooting depth in spillway
One foot (1’) of topsoil will be installed in the constructed channel. CL-PI=15
The topsoil D75 is 0.02”.
Cover Factor (assume good)
bromegrass =
Maintenance Code
(assume good in constructed ) = 1
(assume minor irr. in natural ) = 2

14. SITES WORKSHOP-Phoenix, AZ
Coordinates of top of material: Sta. (ft.)/ Elev. (ft.)
100/85; 310/95; 410/106; 500/107; 700/106; 750/100; 930/95; 960/90; 1000/84

15. SITES WORKSHOP-Phoenix, AZ
Erosion resistant 3% exit slope.
Allowable velocity = 7.0 fps.

16. SITES WORKSHOP-Phoenix, AZ
Smooth Bromegrass is a cool-season grass introduced into the United States from Hungary in This leafy and sod-forming perennial spreads aggressively through both seeds and rhizomes. It grows 15 to 30 inches high and flowers during late spring and early summer in an open panicle.

17. SITES WORKSHOP-Phoenix, AZ
T = Total Hydraulic Stress – lb/ft2
T = Vegetal Stress + Effective Soil Stress
T = Tve +Te
Allowable Vegetal Stress=Tva = 0.75 Ci
Ci = Retardance Index
@ Ci = 5.6
Tva = 4.2 lbs/ft2 - Allowable vegetal stress
Ta= Allowable Total Hydraulic Stress= = 4.25 lb/ft2

18. SITES WORKSHOP-Phoenix, AZ
PART A
FIND: Save Separate Files
1. Is this an acceptable pond design without a
pipe? Y / N
A. Top of Dam= _________ EL.
B. Settled Volume= ____________ CY
2. Remove all vegetation. (HINT-n= For
fine-grained, cohesive soils, the value of n is
taken as ) Is this an acceptable pond
design without a pipe? Y / N
SITES WORKSHOP-Phoenix, AZ

19. SITES WORKSHOP-Phoenix, AZ
PART B: Use PART A input as a start.
This pond has gullies in the upstream area of the pool. Need to design a GSS for this site. Permanent Elev ft. This will cover headcuts with 2.0 ft. of water. Crest of principal spillway = ft EL. Volume of sediment between principal and aux spw = 0.0 AF. Rainfall: PSH=1 day = 7.5”
Principal Spillway Data: (Single Stage Circular Conduit)
Number of Conduits = 1
Length of Conduit = 114 feet
Diameter of Conduit = 12”
Conduit “n” =
Ke = 1.0
HGL at outlet of conduit = feet.
Riser weir length = feet. (24 inch dia.)

20. SITES WORKSHOP-Phoenix, AZ

21. SITES WORKSHOP-Phoenix, AZ
No Wave Berm Width
No stability Berms
Crown = 1.0’
Auxiliary Spillway Data:
We want to do a Stability & Integrity Analysis of the Spillway. Let the program set the crest of the auxiliary spillway.
What is the Auxiliary Spillway Crest (ASC) _________EL.
What is the Top of Dam (TOD) ____________EL.
What is estimated construction volume ________CY.
What is effective soil stress_____________lb/ft2.
What is the integrity distance for the spillway analyzed.

22. SITES WORKSHOP-Phoenix, AZ
Part C Use Part B file as a start
Rainfall: PSH=1 day = 7.5”
Use a Hood Inlet with same diameter and pipe length as the pipe drop.
Distance to bend 100’ and bend to outlet 14’.
The elevation of the bend is 90 and the outlet is 89.
Say the Mannings “n” = 0.013
Circular weir coeff
Entrance coeff
What is the Auxiliary Spillway Crest (ASC) _________EL.
What is the Top of Dam (TOD) ____________EL.
What is estimated construction volume ________CY.
SITES WORKSHOP-Phoenix, AZ

24. SITES WORKSHOP-Phoenix, AZ
Part D Use Part B input file as a start
Add stability berm on the down stream side at 5’ with 25’ top width. Add a wave berm width =20’ on the front slope.
1. What is estimated construction CY?.
SITES WORKSHOP-Phoenix, AZ

25. SITES WORKSHOP-Phoenix, AZ
Management of files
FOLLOW ALONG
Right click on the Start button and select Explore.
Right Click on the Start button, and Select Explore.

26. SITES WORKSHOP-Phoenix, AZ
Highlight Local Drive (C:)
Highlight Local Drive (C:).

27. SITES WORKSHOP-Phoenix, AZ
Click - File/New/Folder
Click on File/New/Folder.

28. SITES WORKSHOP-Phoenix, AZ
1. Type “SITESWorkshop” and enter
2. Exit Explore
Type SITESWorkshop and enter. Exit Explore.

29. SITES WORKSHOP-Phoenix, AZ
1. Left Click the Start button/All Programs/Engineering Applications/SITES/SITES 2005
Click Start button/All Programs/Engineering Applications/SITES/SITES 2005.

30. SITES WORKSHOP-Phoenix, AZ
SITES Integrated Development Environment.

31. SITES WORKSHOP-Phoenix, AZ
Menu-File
New Project
Open Project
Delete Project
Shows last 5 projects
Exit

32. SITES WORKSHOP-Phoenix, AZ
Menu-Help
Contents
Search
About SITES IDE

33. SITES WORKSHOP-Phoenix, AZ
File / New Project
File/New Project. Double click SITESWorkshop.
Locate SITESWorkshop and
Double Click

34. SITES WORKSHOP-Phoenix, AZ
File / New Project
Type EX1 as the new project. Click ok.
TYPE EX1
Click OK

35. SITES WORKSHOP-Phoenix, AZ
File / New File
File/New File
File/New File

36. SITES WORKSHOP-Phoenix, AZ
File / Save As
File/Save As
File/Save As
Click Save

37. SITES WORKSHOP-Phoenix, AZ
HOME SCREEN
HOME SCREEN

38. SITES WORKSHOP-Phoenix, AZ
Navigating in SITES
Home Screen
Schematic
Input Screens
The three primary screens or types of screens in SITES are:
The Home Screen
The schematic screen
Input screens

39. SITES WORKSHOP-Phoenix, AZ
Schematic
Editing File
Dbl-click element to edit
This is the schematic screen. This example shows a complex watershed with a lower watershed dam. There is an upstream subarea, dam, junction, and reach.
Double-click on any element to edit and see the input screens for that element.

40. SITES WORKSHOP-Phoenix, AZ
Input Screen -Typical
Editing data element on schematic
Input Screen -Typical

41. SITES WORKSHOP-Phoenix, AZ
File / Continue
File/Continue
File/Continue

42. SITES WORKSHOP-Phoenix, AZ
Enter Data /Next Screen
4. Class (a) dams that have a product of
storage times the effective height of the
dam of 3,000 or more, those more than 35
ft in effective height, and all class (b) and
class (c) dams shall meet or exceed the
requirements specified in Technical
Release No. 60 (TR-60).
Global Watershed Data

43. SITES WORKSHOP-Phoenix, AZ
Watershed Schematic
Click on the structure icon button.
Click to Add Structure

44. SITES WORKSHOP-Phoenix, AZ
Watershed Schematic
Double click on the structure.
Double Click to Add Data For This Structure

45. SITES WORKSHOP-Phoenix, AZ
Watershed Information
Input Data and Click
Watershed Information.

46. SITES WORKSHOP-Phoenix, AZ
Structure Data Table
Structure Data Table.
InPut Data and Click

47. SITES WORKSHOP-Phoenix, AZ
Watershed Data
NRCS Curve Number Method
Watershed Data.
Input Data and Click

48. SITES WORKSHOP-Phoenix, AZ
Rainfall Data
Rainfall Data.
Input Data and Click

49. SITES WORKSHOP-Phoenix, AZ
Rainfall Distribution Table
Click Open
Rainfall Distribution Table

50. SITES WORKSHOP-Phoenix, AZ
Rainfall Distribution Table
Rainfall Table
Input Data and Click

51. SITES WORKSHOP-Phoenix, AZ
Pool Data
Include planned aerated sediment, for life of structure. (optional)
Pool Data
Include planned submerged sediment, for life of structure.
Start Routing is required.
Input Data and Click

52. SITES WORKSHOP-Phoenix, AZ
Principal Spillway Type
Input Data and Click
No Principal Spillway

53. SITES WORKSHOP-Phoenix, AZ
Valley Elevations
Input Data and Click
Valley Elevations

54. SITES WORKSHOP-Phoenix, AZ
Valley Elevations
Input Data and Click Enter
Centerline Data

55. SITES WORKSHOP-Phoenix, AZ
Valley Elevations
Input Data and Click Enter
Centerline Data

56. SITES WORKSHOP-Phoenix, AZ
Valley Elevations
Input Data and Click Enter
Centerline Data

57. SITES WORKSHOP-Phoenix, AZ
Valley Elevations
Input Data and Click Enter
Centerline Data
Click Next Screen

58. SITES WORKSHOP-Phoenix, AZ
Embankment Template
Embankment Template
Input Data and Click

59. SITES WORKSHOP-Phoenix, AZ
Auxiliary Spillway (AS) Crest
SITES WORKSHOP-Phoenix, AZ
Click
Click Stability and Integrity
Click

60. SITES WORKSHOP-Phoenix, AZ
Auxiliary Spillway (AS) Crest
SITES WORKSHOP-Phoenix, AZ
Input Data and Click
Crest Data. Tie-in Station-6+20-ASC=103.6

61. Tie Station Definition
SITES WORKSHOP-Phoenix, AZ
Tie Station Definition
Downstream end of the level crest section of auxiliary spillway
Ties station together for:
Auxiliary spillway inlet template
Geologic materials in auxiliary spillway exit channel

62. Inlet Spillway Template
280’
Tie-in Station 6+20
50’ 3’
Inlet Spillway Template
Z = 3:1
BW = 30’

63. SITES WORKSHOP-Phoenix, AZ
Auxiliary Spillway Inlet Template
Tie-in Station 6+20
C-retardance. Use inlet data.
Click

64. SITES WORKSHOP-Phoenix, AZ
Auxiliary Spillway Exit Template
Exit Template. Enter C-retardance.
Input Data and Click

65. SITES WORKSHOP-Phoenix, AZ
Auxiliary Spillway Exit Template
SITES WORKSHOP-Phoenix, AZ
Exit Template. Enter C-retardance. Chapter 7 guidance.

66. SITES WORKSHOP-Phoenix, AZ
Auxiliary Spillway Exit Template
SITES WORKSHOP-Phoenix, AZ
Exit Template. Enter C-retardance. Chapter 7 guidance.

67. SITES WORKSHOP-Phoenix, AZ
Auxiliary Spillway Cross Section
Auxiliary Spillway Cross Section
Input Data and Click

68. SITES WORKSHOP-Phoenix, AZ
Auxiliary Spillway Material
Auxiliary Spillway Material
Input Data

69. SITES WORKSHOP-Phoenix, AZ
Auxiliary Spillway Material
Auxiliary Spillway Material
Input Data and Click Next Screen

70. SITES WORKSHOP-Phoenix, AZ
Topsoil Fill And General Fill
Input Data
Click
Fill Option

71. SITES WORKSHOP-Phoenix, AZ
Topsoil Fill And General Fill
Input Data and Click Next Screen
Topsoil Material

72. SITES WORKSHOP-Phoenix, AZ
Output Options
Input Data and Click Next Screen
Output Options

73. SITES WORKSHOP-Phoenix, AZ
Watershed Schematic
File / Home Screen
Watershed Schematic

74. SITES WORKSHOP-Phoenix, AZ
Home Screen
File / Save As
Save
HOME SCREEN----File/Save As
Yes

75. SITES WORKSHOP-Phoenix, AZ
Home Screen
Build / Check FIle
Click
Build / Build File
Build/Check File—Build/Build File

76. SITES WORKSHOP-Phoenix, AZ
Home Screen
View / Summary Table
Click to Highlight
View Summary Table
View Text

77. SITES WORKSHOP-Phoenix, AZ
Output Text
Edit/Find
Click
Click
Adjust Side Bar
Edit/Find
Type in STRESS and click Find Next

78. SITES WORKSHOP-Phoenix, AZ
Output Text
Maximize
Velocity < Va=7.0 fps. OK
Ta=.05 lb/ft2. OK
Output:
Tve=T-Te=1.66 lb/ft2.
Less than allowable of 4.2 lb/ft2 OK

79. SITES WORKSHOP-Phoenix, AZ
Output Text
File/Exit
ASC=103.6 El.
TOD=106.4 El.
Volume=8435 CY
Output:

80. SITES WORKSHOP-Phoenix, AZ
Output Text
File/Exit
Output:

81. SITES WORKSHOP-Phoenix, AZ
Home Screen
File/Save As
A2EX1nopipe.d2c
Finish EX1
File/Save As

82. SITES WORKSHOP-Phoenix, AZ
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The End
The End