Los Angeles County
427 S. Encinal Canyon Road, Malibu, CA
Camp Vernon Kilpatrick Replacement Project
Scoping Documents
Performance Specifications
SECTION G1030
SITE EARTHWORK
PERFORMANCE
A.
B.
C.
Basic Function:
1.
Modify site grades and soils as required for construction of buildings and utilities, for
proper functioning of the project elements, and as indicated in the project program.
2.
Principal finished site earthwork elements required include:
a.
Roadways
b.
Parking lots.
c.
Permanent erosion control structures as required.
3.
Where earthwork elements also must function as elements defined within another
element group, meet the requirements of both element groups.
4.
In addition to the requirements of this section, comply with all applicable
requirements of Section G Building Sitework, and Section G10 - Site Preparation.
Durability:
1.
Erosion Resistance: As specified in Sections G and as follows:
2.
Permanent erosion control structures are required wherever permanent
vegetation will not prevent erosion or sediment loss.
3.
Whenever grades are changed, vegetative stabilization is required immediately, and
shall be maintained until final grades are stabilized with permanent
vegetation.
Operation and Maintenance:
e.
METHODS OF CONSTRUCTION
A.
The following existing earthwork elements shall be preserved:
B.
Changing of Grade Levels:
1.
May 20, 2014
Use one or more of the following methods:
a.
Grading.
b.
c.
Balanced cut and fill, with no excess soil to be removed.
Removal of excess soil from site.
d.
Removal of rock from site.
SECTION G1030 – SITE EARTHWORK
Part 6 – Page 1
Scoping Documents
Performance Specifications
e.
C.
Use one or more of the following methods:
a.
Machine excavation.
b.
Hand excavation.
Excavation Support and Protection:
1.
2.
E.
Use one or more of the following methods:
a.
Sheetpiling.
b.
Cribbing and walers.
Do not use any of the following methods:
a.
Reinforced earth.
b.
Vibroflotation or densification.
Soil Stabilization:
1.
Do not use any of the following methods:
a.
F.
Importation of fill from off site.
Excavation:
1.
D.
Los Angeles County
427 S. Encinal Canyon Road, Malibu, CA
Camp Vernon Kilpatrick Replacement Project
Geotextile reinforcement. .
Temporary Erosion Control Structures:
1.
May 20, 2014
Provide the following:
SECTION G1030 – SITE EARTHWORK
Part 6 – Page 2
Scoping Documents
Performance Specifications
H.
Los Angeles County
427 S. Encinal Canyon Road, Malibu, CA
Camp Vernon Kilpatrick Replacement Project
a.
Checkdams in swales and drainage ditches.
b.
Rock filter dams in small streams and waterways.
c.
Grade stabilization structures in gullies.
d.
Diversion channels across slopes.
e.
Temporary down drain structures to convey concentrated run-off down the face of
cut or fill slopes.
f.
Level spreaders across slopes to convert concentrated flow to sheet flow.
g.
Storm drain outlet protection (riprap).
Permanent Erosion Control Structures:
1.
Provide the following when applicable:
a.
Channel stabilization of waterways, using riprap; concrete; or vegetation. c.
Slope stabilization using:
2.
Geogrids.
2).
Grass pavers.
3).
Riprap.
4).
Concrete.
d.
Permanent downdrain structures, where concentrated water runoff is likely to
damage slopes.
e.
Permanent sediment basin None - N/A.
f.
Storm drain outlet protection using riprap.
g.
Vegetated storm water conveyance channels.
Do not use any of the following methods:
a.
I.
1).
Sand fences.
Temporary Vegetative Erosion Control Measures:
1.
Provide one of the following:
a.
b.
2.
1).
Straw or hay.
2).
Wood waste, chips, or bark.
3).
Erosion control matting or netting.
4).
Cutback asphalt.
5).
Polyethylene film (banks only).
Temporary cover crops on disturbed areas for stabilization.
Do not use any of the following methods:
a.
May 20, 2014
Mulching of disturbed areas for stabilization, using:
Coastal dune stabilization with vegetation and irrigation.
SECTION G1030 – SITE EARTHWORK
Part 6 – Page 3
Scoping Documents
Performance Specifications
Los Angeles County
427 S. Encinal Canyon Road, Malibu, CA
Camp Vernon Kilpatrick Replacement Project
b. Permanent Vegetative Erosion Control Measures: per County Standard Urban
Stormwater Management Plan (SUSMP) requirements.
END OF SECTION G1030
May 20, 2014
SECTION G1030 – SITE EARTHWORK
Part 6 – Page 4