20010635 Ver 1_Stormwater Info_20030327

Mountain Air Country Club
Banks Creek Area
New Nine Hole Golf Course
Stormwater Drainage
Installation Specifications
March 27, 2003

Mountain Air County Club
Stormwater Drainage Installation Overview
WORK TEAMS
A-TEAM: Sediment Control Team:
• Establishes groundcover
• Maintains stream diversions
• Maintains required logs
• Monitors weather forecast
B-TEAM: Installation Team:
• Installs Pipes
• Installs and constructs
structures
In order to reduce the risk of breaches of the
Sediment Pollution Control Act during pipe
installation in the streams and trout buffers,
Mountain Air has prepared a document that
identifies the order and methods used for each
specific segment of construction.
The construction tasks for each hole are
identified along with the details that will be
followed during its construction. The Teams
will be briefed at the start of each workday and
will be informed of the 10 day forecast.
This booklet and a complete copy of the
construction documents and sediment control
plan will be maintained onsite with the NPDES
Stornzwater Logs. The Sediment Control Crew
will be tasked with maintaining all sediment
pollution control logs.
Mountain Air has determined that by creating
work teams the chance of sediment leaving
the site will be reduced. The Teams will be
tasked with specific work tasks and will be
under the joint supervision of the Construction
Manager, who has been certified under the
state-sanctioned Clean Water Contractor
program.
STANDARDS AND DETAILS
Silt Fence
Culvert Headwall and Outlet
Temporary Diversion Ditch
Temporary Sediment Trap
Spring Box
Check Dam
Permanent Diversion
Creek Diversion Detail
Rip-Rap Inlet Protection
Drop Inlet Protection
Culvert Stone Headwall Apron Inlet
Keying RCP Pipes on Steep Slopes
Bridge Temporary Stream Crossing
Sediment Pit Detail
Plunge Pool
Culvert Endwall for Single and Double Culvert
Concrete Drop Inlet
Concrete Junction Box
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Mountain Air County Club
Construction Standards
Mountain Air will follow the attached details, which specify the construction and
manufacturing standards that will be used in order to limit the risk of pollution by
sediment.
SELECTED CONSTRUCTION STANDARDS
• All fill supporting stormwater infrastructure will be compacted to 95%
• All bedding will meet the manufacturer's standards
• Junction boxes will have 8 inch thick concrete bases
• 0-ring gaskets meeting the requirements of ASTM C 443 will be used
• All construction will meet or exceed DOT standards
RISK ASSESSMENT
Mountain Air will reduce the already minimal risk of sedimentation due to a significant
rain event by monitoring the 10-day weather forecast. The Sediment Control Team will
be charged with monitoring the weather and stopping the installation in the event a
forecasted significant rain event. The risk of a 5-year event during afive-day period is
0.27% and the risk of a 100-year event in a seven-day period is 0.02%.
Storm Event Yearly Risk of
Storm Daily Risk of
Storm 5 Day Risk 7 Day Risk
5 ear 20% .054% 0.27% 0.37%
10 ear 10% .027% 0.13% 0.18%
25 ear 4% .011% 0.05% 0.077%
50 ear 2% .0054% 0.027% 0.037%
100 year 1% .0027% 0.013% 0.018%
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Mountain Air County Club
Hole 1 Structures
Installation of the pipe for Hole 1 is anticipated to take five days with many of the tasks
occurring concurrently. The teams will undertake six major tasks in accordance with the
specified details and plans to install pipes #1, #2, and #3 and their associated headwalls,
drop inlets and junction box.
MAJOR TASKS
Task l: Stream Diversion
Task 2: Plunge Pool Construction
Task 3: Installation of Pipe #3, Junction Box #3 and Lower Pipe #2
Task 4: Installation of Upper Pipe #2, Drop Inlet #2, Pipe #1 and Headwall #1
Task 5: Removal of Stream Diversion
PIPES
Pi e # Len th Size T e Inv. In Inv. Out % Slo e
1 37' 24" RCP Class 3893.20 3875.40 48.11
III
2 200' 30" RCP Class 367490 3614.40 30.25
V
3 26' 48" RCP Class 3613.90 3613.64 1.00
III
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Mountain Air County Club
Hole 1 Tasks
Task 1: Stream Diversion
• Sediment Control Team to divert stream into the flume system in accordance
with the culvert installation sequence and details submitted with the
approved Erosion Control Plan.
Task 2: Plume Pool Construction
• Sediment Control Team to construct and stabilize Plunge Pool in accordance
with details provided by Buck Engineering.
• Sediment Control Team to divert stream into the completed plunge pool.
Task 3: Installation of Pipe #3, Junction Box #3 and Lower Pipe #2
• Installation Team to install pipe #3 beginning at the lower invert and
working uphill toward the location of junction box # 3.
• Installation Team to install junction box # 3 and tie pipes #2 and # 3 into
junction box # 3
• Installation Team will continue working on the remaining lower section of
pipe # 2.
Sediment Control Team to establish temporary groundcover within 7 days of
completion of this installation
Task 4: Upper Pipe #2, Drop Inlet #2, Pipe #1 and Headwall #1
• Installation Team to install remainder of pipe # 2 beginning at the upper end
of the previously installed pipe and working uphill toward the location of
drop inlet # 2.
• Installation Team to install drop inlet # 2 and tie pipes # 2 and pipe #1 into
drop inlet #2.
• Installation Team to install pipe # 1.
• Installation Team to install headwall # 1 at the head of pipe #1.
• Sediment Control Team to establish temporary groundcover within 7 days of
completion of this installation.
Task 5: Removal of Stream Diversion
• Sediment Control Team to divert stream into the permanent storm drainage
system.
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Mountain Air County Club
Hole 2 Structures
Installation of pipe for Hole 2 is anticipated to take five days with the tasks occurring
concurrently. The teams will undertake five major tasks in accordance with the specified
details and plans to install pipe #4 and its associated headwalls and junction boxes.
MAJOR TASKS
Task 1: Stream Diversion
Task 2: Plunge Pool Construction
Task 3: Installation of Pipe #4
Task 4: Installation of Headwall #5
Task 5: Removal of Stream Diversion
PIPES
Pi e # Len th Size T e Inv. In Inv. Out % Slo e
4 350' 30" RCP Class
V 3398.40 3317.00 23.26
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Mountain Air County Club
Hole 2 Tasks
Task 1: Stream Diversion
• Sediment Control Crew to divert stream into the flume system in
accordance with the culvert installation sequence and details submitted
with the approved Erosion Control Plan.
Task 2: Plunge Pool Construction
• Sediment Control Team to construct and stabilize Plunge Pool in
accordance with details.
• Sediment Control Team to divert stream into the completed plunge pool.
Task 3: Installation of Pipe #4
• Installation Team to install pipe # 4 from the plunge pool upslope toward
headwall #5 in a manner to minimize disturbance to the existing stream
channel.
• Sediment Control Team to establish temporary groundcover within 7 days
of completion of this installation
4: Installation of Headwall #5
Installation Team to install headwall # 5 and tie in pipe #4.
Sediment Control Team to establish temporary groundcover within 7 days
of completion of this installation
Task 5: Removal of Stream Diversion
• Sediment Control Team to divert stream into the permanent storm
drainage system.
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Mountain Air County Club
Holes 6 and 7 Structures
Installation of pipe for Holes 6 and 7 is anticipated to take seven days with the tasks
occurring concurrently. The teams will undertake five major tasks in accordance with the
specified details and plans to install pipes #12 & 14 and its associated headwalls and
junction boxes.
MAJOR TASKS
Task 1: Stream Diversion
Task 2: Plunge Pool Construction
Task 3: Installation of Pipe #14, and Drop Inlet #17
Task 4: Installation of Pipe #12, and Junction Box # 16
Task 5: Removal of Stream Diversion
PIPES
Pi e # Len th Size T e Inv. In Inv. Out % Slo e
12 436' 24" RCP Class 3383.75 3299.80 19.25
V
14 86' 24" RCP Class 3299.30 3279.75 22.73%
III
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Mountain Air County Club
Holes 6 and 7 Tasks
Task 1: Stream Diversion
• Sediment Control Crew to divert stream into the flume system in
accordance with the culvert installation sequence and details submitted
with the approved Erosion Control Plan from above proposed location of
junction box #16 to below plunge pool location at outlet of pipe #14
Task 2: Plunge Pool Construction
• Sediment Control Team to construct and stabilize Plunge Pool in
accordance with details.
• Sediment Control Team to divert stream into the completed plunge pool.
Task 3: Installation of Pipe # 14, and Drop Inlet # 17
• Installation Team to install pipe #14 beginning at the lower invert and
working uphill toward the location of drop inlet #17.
• Installation Team to install drop inlet # 17 and tie pipes #14 into drop inlet
#17
• Sediment Control Team to establish temporary groundcover within 7 days
of completion of this installation
Task 4: Installation of Pipe #12, and Junction Box # 16
• Installation Team to install pipe # 12 beginning at the lower invert and
working uphill toward the location of junction box #16.
• Installation Team to install junction box # 16 and tie pipe #12 into
junction box #16
• Installation Team to install temporary collars to junction box #16 in order
to bring the top of the junction box up to existing ground level.
• Sediment Control Team to establish temporary groundcover within 7 days
of completion of this installation
Task 5: Removal of Stream Diversion
• Sediment Control Team to divert stream into the permanent storm
drainage system via the top of junction box # 16.
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Mountain Air County Club
Hole 8 Structures
Installation of pipe for Hole 8 is anticipated to take five days with the tasks occurring
concurrently. The teams will undertake five major tasks in accordance with the specified
details and plans to install pipes #5, 6 and 11 and its associated headwalls and junction
boxes.
MAJOR TASKS
Task 1: Stream Diversion
Task 2: Plunge Pool Construction
Task 3: Installation of Pipe #11, and Headwall #15
Task 4: Installation of Pipe #6, and Drop Inlet # 8
Task 5: Installation of pipe #5 and Drop Inlet #7
Task 6: Removal of Stream Diversion
PIPES

Pi e # Len th Size T e Inv. In Inv. Out % Slo e
5 44 18" RCP Class 3468.58 3453.50 34.27
III
6 235 24" RCP Class 3453.00 3407.82 19.23
IV
11 53' 24" RCP Class 3406.47 3384.75 40.98
III
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Mountain Air County Club
Hole 8 Tasks
Task 1: Stream Diversion
• Sediment Control Crew to divert stream into the flume system in
accordance with the culvert installation sequence and details submitted
with the approved Erosion Control Plan
• Sediment Control Team to divert stream into the top on junction box # 16
and Stream Diversion pipe will be outleted directly into pipe #12.
Task 2: Plunge Pool Construction
• Sediment Control Team to construct and stabilize Plunge Pool in
accordance with details provided by Buck Engineering.
Task 3: Installation of Pipe #11, Headwall #15
• Installation Team to install pipe #11 beginning at the lower invert and
working uphill toward the location of headwall #15.
• Installation Team to install headwall # 15 and tie pipe #11 into headwall
#15.
• Sediment Control Team to establish temporary groundcover within 7 days
of completion of this installation.
• Sediment Control Team to divert stream into completed plunge pool and
remove lift collars from junction box 16.
Task 4: Installation of Pipe #6 and Drop Inlet #8
• Installation Team to install pipe #6 beginning at the lower invert and
working uphill toward the location of drop inlet #8.
• Installation Team to construct drop inlet #8 and tie pipe #6 into drop inlet
#8.
Sediment Control Team to establish temporary groundcover within 7 days
of completion of this installation.

Task 5: Installation of Pipe #5 and Drop Inlet #7
• Installation Team to install pipe #5 beginning at drop inlet #8 and working
uphill toward the location of drop inlet #7.
• Installation Team to construct drop inlet #7 and the pipe #5 into drop inlet
#7.
Task 6: Removal of Stream Diversion
• Sediment control team to direct stream into drop inlet #7.
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Pipes not affecting stream channel:
Pi e # Len th Size T e Inv. In Inv. Out % Slo e
7 74' 18" RCP Class 3475.41 3450.40 33.80
III
8 132' 18" RCP Class 3449.90 3445.50 3.33
III
9 67' 18" RCP Class 3445.00 3431.1 S 20.67
III
10 112' 18" RCP Class 3430.65 3414.80 14.15
III
13 285' 18" RCP Class 3374.75 3299.80 26.30
V
15 39 18" RCP Class 3895.50 3886.15 23.97%
III
16 244 18" RCP Class 3885.65 3834.72 20.87%
V
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