2012-03-07_PERMIT FILE - C2010088 ‎(24)‎

• Permit No: C2010088
• IBM Index Class Name: Permit File
• Doc Date: 3/7/2012
• Doc Name: Union Pacific Track Roadbed Construction Specifications
• Section_Exhibit Name: Exhibit 16
• Media Type: D
• Archive: No

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life and/or will cause or allow soil erosion. After placement of topsoil, all slopes over three foot (3')
high shall be cat walked.
8.18 SLOPE PROTECTION AND EROSION CONTROL - This work shall consist of installing
silt fence and ditch checks for controlling stormwater erosion during construction. A copy of the
Industry's Storm Water Pollution Prevention Plan will be given to the Engineer before the beginning
of construction.
8.19 SEEDING - This work shall consist of the preparing and seeding roadbed slopes, disturbed
areas and areas designated by the Engineer. The areas involved will be comprised of cut and fill
slopes and other areas disturbed by the construction, exclusive of rock slopes.
Seedbed preparation, seeding rates and mixtures, fertilizer rates and mulching requirements shall
conform to the state DOT specification for the region.
8.20 RIPRAP - Riprap shall be hard, durable, angular in shape and shall be free of cracks, seams,
expansive materials or other defects that would cause accumulated deterioration from exposure to
climatic conditions.
AVERAGE
WEIGHT
RIP RAP PER STONE
CLASS (LBS.)
DIMENSION LAYER TYPICAL
(INCHES) THICKNESS VELOCITIES
1 50 to 200 9 to 14 1' -6"
I1 400 to 1,000 17 to 24 2' -0"
III 1,000 to 4,000 24 to 38 3' -0"
IV > 4,000 >38 4' -0"
6 -8fps
8 -12 fps
>12fps
SPECIAL CASES
The Engineer shall specify the Class of riprap. Riprap shall be placed in such a manner as to avoid
segregation of various sizes of rock and distributed so that there will be no large accumulation of
either the larger or smaller sizes of stone. Individual rocks shall be placed in tight contact with one
another in such a way as to produce the least amount of void spaces and providing adequate
embankment protection and erosion control. The entire mass of riprap shall be well distributed within
the limits specified. However, the following allowances shall be acceptable to produce the required
riprap protection:
Riprap Class I No allowances are permitted
Riprap Class II 15% of Riprap Class I
Riprap Class III 15% of Riprap Class I and 15% of Riprap Class II
Riprap Class IV 15% of Riprap Class I, 15% of Riprap Class II and 15% of Riprap Class III
8.21.00 CULVERTS - CORRUGATED STEEL AND CORRUGATED ALUMINUM ALLOY
These pipe culvert specifications co-, er the assembly and installation of
a) Corrugated Steel Pipes - (CSP)
b) Corrugated Structural Plate Pipe - (SPP)
c) Corrugated Aluminum Alloy Pipe - (CAAP)
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