Erosion and sedimentation pollution control plan guide for small projects

[From the U.S. Government Printing Office, www.gpo.gov]

NIPS. 01 - 23

EROSION AND
SEDIMENTATION
Cheater POLLUTION CONTROL
PLAN GUIDE FOR
SMALL PROJECTS

Erosion & Sediment Control Plan

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LEGEND AND SYMBOLS
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PROJECT

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DeWwwo

1995

A Publication of the Southeast Pennsylvania

Association of Conservation Districts

SOUTHEAST PENNSYLVANIA
ASSOCIATION
OF CONSERVATION DISTRICTS

John Thomas, Manager Ed Magargee, Manager
Bucks Co. C.D. Delaware Co. C.D.
924 Town Center Rose Tree Park - Hunt Club
New Britain, PA 18901-5182 1521 N. Providence Rd.
(215)345-7577 Media, PA 19063
(610)892-9484

Dan Greig, Manager Rich Kadwill, Manager
Chester Co. C.D. Montgomery Co. C.D.
Gov't Service Center 1015 Bridge St.,Suite B
601 Westtown Road, Suite 395 Collegeville, PA 19426
West Chester, PA 19382-4519 (610)489-4506
(610)696-5126

Project Coordinated by: Ed Maaaraee

OCTOBER 1995

PIROJECT FUNDING STATEMENT
This project we originally funded in part by a $2,000.00 grant from the PA Department of
Environmental Resources in 1992. The Bureau of land and Water Conservation approved the project
to be funded with money collected from fines and penalties deposited in the PA Clean Water Fund.
The 1995 Update was financed in part through a Federal Coastal Zone Management Grant
from the PA Department of Environmental Protection (fon-nerly the Department of Environmental
Resources), with funds provided by NOAA. The views expressed herein are those of the author(s) and
do not necessarily reflect the views of NOAA or any of its subagencies.

TABLE OF CONTENTS

INTRODUCTION ..........................................................................................................1

CHAPTER 102 - EROSION CONTROL REGULATIONS ...........................................1

GENERAL FACTORS TO BE CONSIDERED IN
DEVELOPING A PLAN .................................................................................................2

VEGETATION TO CONTROL EROSION ......................................................................2

ABOVE SITE DRAINAGE .............................................................................................5

EROSION & SEDIMENT CONTROL PRACTICES .......................................................5

EROSION & SEDIMENT CONTROL PLAN
NARRATIVE ................................................................................................................ 16

EROSION & SEDIMENT CONTROL PLAN
DESIGN & LAYOUT SHEET ...................................................................................... 19

APPENDIX .................................................................................................................. 21

WARNING

This guide is for use on low hazard projects which we
have defined as follows:
1. Disturbs less than one acre of earth.
2. Slopes must not exceed 8% within the disturbed area.
3. Maximum off-site drainage to be diverted cannot exceed
five acres.
4. For projects within special protection watersheds, consult
your local Conservation District for additional guidance.
The Conservation District reserves the right to determine
whether or not this guide is acceptable.

INTRODUCTION

This document was designed to assist in the development of Erosion and Sediment Pollution
Control Plans for projects which disturb less than 1 acre, and are "low hazard" involving minimal
disturbance of gently sloping areas. Existing erosion and sediment control publications
concentrate on the larger complex projects. The material addressed in these publications is often
understandable only by qualified professionals. To determine the essential requirements for a
small project is nearly impossible. The existing manuals do not attempt to make a distinction
between multi-million dollar projects, and the single lot improvement project.
Your local Conservation District would like to clear up this confusion, and simplify the erosion
and sediment pollution control planning process. Our intent is to take a step by step outlined
approach to the development of an erosion and sediment pollution control plan.
If erosion control plans are required by a local municipality for your project this manual may
not be sufficient. Local regulation can require more stringent controls and procedures than those
proposed by the manual. Erosion and Sediment Control Plans for small projects properly prepared
with the assistance of this manual will satisfy the requirements of Chapter 102 pertaining to plan
development and content. The local Conservation District reserves the right to determine
whether or not this manual can be used due to the objective nature of the term "Low Hazard."
Please be aware that other federal, state, and local permits maybe required. To check on
possible permit requirements contact The Department of Environmental Protection7s Regional
Office in Conshohocken. Please look in the Blue Pages under State Government for the current
phone number. Also contact the local municipality in which the construction is to take place to
check on their requirements.

CHAPTER 102 - EROSION CONTROL REGULATIONS

The reason for Chapter 102 - "Erosion Control Regulations" is to implement the intent of the
Clean Streams Law of Pennsylvania. The Clean Streams Law prohibits the discharge into the
waters of the Commonwealth any substance which creates a nuisance. The law is not this simple
and straight forward, but the bottom line is essentially the same. Sediment with its number one
rating, by volume, as a pollutant to Pennsylvania's waters is listed as a nuisance.
A copy of Chapter 102 is available from your local conservation district. Please consult the
latest version of these regulations when preparing your plan if you have questions not covered by
this guide. Chapter 102 is a set of rules and regulations administered by the Department of
Environmental Protection, Bureau of Land and Water Conservation. The regulations attempt to
provide controls to alleviate the sediment pollution problem. Anyone who disturbs vegetation, or
exposes the earth's surface to the forces of erosion is subject to these controls. The primary
element of Chapter 102 is the Erosion and Sediment Pollution Control Plan. This plan is required to
include information on site characteristics, proposed alterations, and a step by step outline on how
accelerated erosion and the resulting sedimentation will be controlled throughout the duration of
the project.
The regulations require that every project which involves disturbing the earth's soil layer
develop the type of plan described above. Projects which disturb 25 acres or more, and do not
meet several conditions must obtain an Earth Disturbance Permit. Small projects must develop
and implement the required erosion and sediment control plan, but no earth disturbance permits
or reviews are required by Chapter 102. A small project which fails to produce an erosion and
sediment control plan during an official site inspection is subject to the same fines and penalties as a
lar.qer permitted site.
Local municipalities and the Department of Environmental Protectiods various permitting
Bureaus often require an erosion and sediment control plan to be submitted for review by the
Conservation District prior to construction. Local municipalities can also have rules and
regulations that are more stringent than Chapter 102.
Chapter 102 regulations attempt to keep sedimentation from damaging the waters of the
Commonwealth. The regulations require an Erosion and Sediment Pollution Control Plan to be
developed, implemented, and maintained. The regulations although complex simply attempt to
keep erosion and sediment from becoming a nuisance.

GENERAL FACTORS TO BE CONSIDERED
IN DEVELOPING A PLAN

A. Practice Proper Site Grading - Hold Site Grading to a Minimum

The risk of severe erosion increases in relationship to the amount of site alteration. Steeply
sloping sites generally will require more grading than gently sloping sites. Excessive cutting and
filling may alter the ground water system, open seeps or expose unstable soils. Improperly
compacted fills may also be extremely erosive.
All of the topsoil from areas where cuts and fills have been made should be stockpiled and
redistributed uniformly after grading. This is the key to revegetating the site.

B. Save Existing Vegetation, Especially Trees

Vegetative Cover is the best soil protection against erosion. A good sod can be up to 98%
effective in controlling erosion. Vegetation to be saved should be protected during the
construction process. Trees and shrubs that are to be saved should be marked and roped off along
the entire drip line, (area under the crown of the tree.) This procedure protects the plants from
damage by construction equipment. Filling around trees should be avoided. Advice on how to best
protect trees is available from D.C.N.R., Bureau of Forestry.

C. Minimize the Area and Time of Exposure

It is risky to remove all the vegetation and topsoil from areas, but sometimes it cannot be
avoided. When this happens, plan the construction sequence to keep the size and time of
exposure to a minimum. Stabilize all areas as soon as you can. Applying a stone base to your
access or driveway the same day it is cut in is an exellent example.

D. Timing of Your Project

Always try to schedule earthmoving activities during the growing season. Permanent seedings
become established best when planted in the Spring or early Fall.

VEGETATION TO CONTROL EROSION

The use of vegetation to control erosion and sedimention should be given primary
consideration when developing your E&S control plan. Areas of moderate slopes and fertile soil
can be easily stabilized by using plants and cultural methods common in the region. Establishing
heavy plant cover on moderate slopes will usually protect the site from erosion. During land use
changes a temporary cover of annual vegetation is sufficient and at the completion of the change
more permanent cover crops should be used. Adequate soil cover for soil stabilization is when
vegetation covers 709/o of each square yard.
Sites that have exposed subsoil, steep slopes, shallow depth to bedrock, droughty conditions
or other limiting properties require additional treatment. Such sites demand special attention be
given to seedbed preparation, adjusted fertility levels, supplemental irrigation, adapted seedlings
or plantings and site protection until the vegetative cover is established. More emphasis must be
placed on the stabilization of critical areas because they erode severely and are the source of much
sediment.
Since vegetation is considered the most effective and practical erosion control practice it is
recommended that you consult the Penn State Agronomy Guide. The information contained in
this publication stems from current research and development of erosion control plantings.
Information from selecting good quality seed to maintaining established areas is well presented,
and will be a valuable asset to your erosion control plan design efforts. The proper seed mixtures
can be obtained from building supply stores, farm product stores, or even ordered from seed

catalogs. Local Hardware stores sell seed mixtures which can be combined with another mixture
to obtain the recommended amounts. Included in this guide are seeding mixtures and preparations
for standard sites. This information if used will provide adequate stabilization on sites which do not
have any special problems.

RECOMMENDATIONS FOR REVEGETATION

A. LIME - AGRICULTURAL GRADE LIMESTONE
Adding lime to the soil is vital to your revegetation efforts. The majority of disturbed sites are
acid and infertile. Acid precipitation complicates this pH problem. A soil test from a reptutable
laboratory is recommended. If soil test results are not available apply lime at the following rates:
I Lime 4 tons per acre 190 lbs. per 1000 s.f.

B. FERTILIZER - COMMERCIAL TYPE 10-20-20
The need for fertilizer can not be underestimated. Fertilizer will greatly increase the growth of
both the plant and its roots. Once again a soil test is the preferred alternative. If soil test results are
not available apply fertilizer as follows:
I Fertilizer 930 lbs. per acre 25 lbs. per 1000 s.f.

C. MULCH - HAY OR STRAW
All areas which are seeded with either temporary or permanent seed mixtures should be
mulched. Mulch is a loose layer 3/4" to 1" deep of Hay or Straw. Mulch reduces soil erosion, aids
seed germination, and conserves moisture. Hay or straw should not be chopped or finely broken
during application. Mulch should be applied as follows:
I Mulch 3 tons per acre 140 lbs. per 1000 s.f.

D. SEEDED PREPARATION AND SEEDING METHODS
Prior to seeding, apply the recommended amount of limestone and work as deeply as possible
into the soil. At seeding time work recommended fertilizer as deep as possible into the soil. Seed at
the recommended rates and follow with an adequate layer of mulch.
Seed can be applied to disturbed areas in many ways. Broadcast seeding by either hand or
spreader, drill, and hydroseeding are some examples. Hydroseeding is a common practice on
Construction Sites. The lime, fertilizer, and seed mixture is added at one time. Warning: To
achieve adequate revegetation the seedbed still must be properly graded and tilled. Wood
Cellulose a paper-like product is often substituted for mulch. The rate of application should be 320
lbs. per 1,000 square yards. This is not the preferred alternative. Wood Cellulose is better applied
at a rate of 160 lbs. per 1,000 square yards as a tack coat to hold straw or hay mulch in place.
If temporary seeding is necessary divide the fertilizer and lime recommendations. Apply the
following as part of the temporary seeding:

Lime 1 ton per acre 50 lbs. per 1000 s.f.
Fertilizer 150 lbs. per acre 5 lbs. per 1000 s.f.

Then apply the remainder of the recommended rates during the final seeding process.

E. TEMPORARY SEED MIXTURE

Annual Ryegrass is a quick germinating species of grass which can be seeded at almost
anytime. If you plan to leave your project disturbed and inactive for 20 days or more a temporary
seeding should be applied immediately. If your site is going to remain inactive for 6 months or more,
however a permanent seeding is necessary.

Annual Ryegrass 40 lbs. per acre 1 lbs. per 1000 s.f.

F. PERMANENT SEED MIXTURES

Establishing a permanent vegetative cover is the final step to effective erosion and sediment
pollution control. It is recommended that the Penn State Agronomy Guide be consulted. To make
this guide comprehensive we have selected a few mixtures which will meet the requirements of
Chapter 102 - Erosion Control.

Lawn and Mowed Areas

A. Kentucky Bluegrass 30 lbs. per acre 12 oz. per 1,000 s.f.
Redtop 3 lbs. per acre 2 oz. per 1,000 s.f.
Perennial Ryegrass 20 lbs. per acre 8 oz. per 1,000 s.f.

*TOTAL SEEDING 53 lbs. per acre 22 oz. per 1,000 s.f.

B. Penniawn-Fine Fescue 40 lbs. per acre 16 oz. per 1,000 s.f.
Redtop 3 lbs. per acre 2 oz. per 1,000 s.f.
Perennial Ryegrass 20 lbs. per acre 8 oz. per 1,000 s.f.

*TOTAL SEEDING 63 lbs. per acre 26 oz. per 1,000 s.f.

Slopes or Un-Mowed Areas

**Crownvetch 25 lbs. per acre 10 oz. per 1,000 s.f.
Perennial Ryegrass 25 lbs. per acre 10 oz. per 1,000 s.f.

*TOTAL SEEDING 50 lbs. per acre 20 oz. per 1,000 s.f.

All mixtures given above are for PLS - Pure Live Seed 100%. To calculate PLS, the percentage of
pure seed is multiplied by the percentage of germination, and the product is divided by 100.(85%
Pure Seed x 72% germination) divided by = 61% PLS. To determine how much seed to plant, divide
the percentage into 100. Example: 100 Divided by 61 = 1.63. Thus, every pound of seed mixture
called for should then be 1.63 lbs.
** - Crownvetch is a Legume and will require an inoculant.
Please contact your seed supplier for specific directions on appling the required inoculant.

G. TIME OF SEEDING - Permanent

For best results, grass and legume seedings should be made in the Spring; however, with
proper establishment techniques, disturbed sites can be seeded almost anytime from spring to fall.
A general rule is as follows:
(1) Legume seedings need a growing period of at least 10 to 12 weeks prior to hard frosts.
(2) Grasses generally require at least 4 to 6 weeks of growth prior to hard frosts.

ABOVE SITE DRAINAGE

It is important to consider the possible problems that can be created by run-off from above
your project. Run-off should be diverted safely around any disturbed areas, or be slowed and
carefully directed through the area of disturbance. Unprotected soil erodes severely when
exposed to concentrated run-off.

In order to evaluate the issue purchasing a topographic map of your area may prove
beneficial. Topographic maps are available from the U.S. Geological Survey, Map Sales, Federal
Center, Box 25286, Denver, CO 80225. Small projects can often be observed in the field. Check for
existing signs of erosion within the project area. Look for concentrated run-off sources such as
downspouts from roof gutters, swale outlets, and springs.

Methods to divert the run-off will be listed in the Control Practice section. Keeping clean run-
off from picking up sediment from your project will be very beneficial.

E & S CONTROL PRACTICES

This next section is devoted strictly to providing the erosion and sediment control plan
designer with standards and specifications, for the most frequently used control practices. A few of
the following designs call for specific engineering calculations. If the practice is intended to be left in
place for a permanent control structure the Conservation District highly recommends seeking
professional assistance. Since this manual is intended only for "Low Hazard" sites, however, the
majority of the necessary controls can be designed with the following sheets as guidelines.
The design specifications were developed from the requirements presented in the "Erosion
and Sediment Pollution Control Program Manual of April 1990" by the Bureau of Land and Water
Conservation of the Department of Environmental Protection -
These controls are not the only controls which can be utilized. If you design controls other
than those included in this manual simply include a design sketch with your erosion and sediment
control plan. Soil information is presented in the County Soil Survey available from your local
Conservation District Office.

Filter Fabrics Fence Installation Details

*Wood or Steel
Support Stake Fence STANDARD SECTION
Compacted Backfill 18" FENCE HEIGHT
Ground

Existing
6"
-Toe Anchor Trench
12;; -
L
6"
V Use 2" x 2" Wood Stakes (Min)
or Steel Stake of equal strength

*SPACING OF SUPPORT STAKES @ 8' MAX.
Reinforcing Mesh**

*Wood or Steel 3
Support Stake Fabric I Min. 10 Ga Wire
REINFORCED SECTION SEE CUTAWAY VIEW Compacted Backfill GROUND
30" FENCE HEIGHT
E)(ISTING
6" 1"x1"x12"
TOE ANCHOR TRENCH Stakes

Reinforcement
Mesh

**MESH: Either Industrial Polypropolene
or Steel mesh w/Max 6"
Opening = 1" - Min. 14 Ga.

Fabric SPACING OF SUPPORT STAKES
Cutaway View @ 8" MAX.

TABLE 5.2 Maximum Slope Lengths for Filter Fabric Fences
Maximum Slope Length (ft) Above Fences
Slope - Percent 18" High Fence 30" High Fence
2 (or less) 250 500
5 100 250
10 50 150
15 35 100
20 25 70
25 20 55
30 15 45
35 15 40
40 15 35
45 10 1 30
50 10. 1 25
Slope - Percent: A 2% slope would equal a two foot vertical drop in 100 feet of
Fence,
Compacted Backfill
Grou"

12"
6'

Fab

horizontal distance.

(Slope Length is calculated based on drainage area; multiple rows of silt fence is not
acceptable.)

FILTER FABRIC FENCE
(SILT FENCE)

INSTALLATION:
(1) A trench will be plowed or otherwise excavated to the required depth with little, if
any, disturbance to the clownslope side of the trench. The bottom of the trench
and the fence top will be placed at level grade.
(2) Support stakes will be driven to the 12" minimum depth below the existing ground
surface, at 8' maximum intervals.
(3) Stretch and fasten fabric to the upslope side of the support stakes (if a reinforced
section, fasten reinforcement mesh prior to fastening the fabric).
(4) Where ends of fabric come together, they will be overlapped, folded and stapled to
prevent sediment bypass.
(5) The toe anchor will be backfilled and compacted to a density equal to surrounding
soils.
(6) If constructing a reinforced section, attach guy wires to support stakes. Provisions
should be made for easy loosening and removal of guy wires to allow for access to
perform maintenance work.

MAINTENANCE:
(1) The fence installation should be inspected after every precipitation event and
weekly. Any necessary repairs will be made immediately.
(2) Accumulated sediments will be removed as required to keep the fence functional.
In ail cases remove deposits where accumulations reach 1/2 the above ground
height of the fence.
(3) All undercutting or erosion of the toe anchor will be repaired immediately with
compacted backfill materials.

RESTRICTIONS:
(1) The formation of concentrated flows on the drainage slope above a filter fabric
fence installation is not permitted. If concentrated flows do occur, direct slope
stabilization measures must be employed to prevent such conditions.
(2) Filter fabric fences will not be placed in any area of concentrated flows such as
ditches, swales, channels, etc.
(3) Filter fabric fences will not be used in areas where rock or rocky soils prevent the
full and uniform anchoring of the fence toe.
(4) Filter fabric material will not be placed across the entrance to pipes or culverts and
will not be wrapped around the principal spillway structures of sediment traps or
basins.

419

ILLUSTRATION

Straw Bale Barrier

1. Excavate the Trench. 2. Place and Stake Straw Bales. 3. Wedge Loose Straw Between 4. Backlill and Compact the
Bales. Excavated Soil. (Anchor Toe)

A@ -

Widt

2"x 2"x 36" Stakes

Staked and Entrenched
Binding Wire Straw Bale
or Twine
ompacted Soil to
Filtered Runoff Prevent Piping (Anchor toe)
Sediment Laden
Runoff

18"

INSTALLATION:
(1) The anchoring trench will be constructed to the required grade and depth
shown.
(2) Support stakes will be driven to the 18" minimum depth.
(3) The anchoring trench will be backfilled and compacted to a density equal to
undisturbed site soils.

MAINTENANCE:
(1) The barrier will be inspected after every runoff event. Dislodged bales should
be reset, staked and backfilled to the requirements listed under "Installation".
All clogged or inoperative bales will be replaced.
(2) Accumulated sediments will be removed as required and in all cases where
uniform accumulations reach 1/3 the above ground height of the barrier.
(3) All undercutting or erosion of the anchor toe will be repaired immediately with
compacted backfill materials.

RESTRICTIONS:
(1) Restrictions are the same as fabric fence.
-,N r@
'Off N,
11 I-dU
Zunoff

(2) Slope length limitations are the same as fabric fence.
(3) Straw bale barriers will be replaced every three months or more often if the
bales deteriorate.

Z3 -1Z
> -0 rm
No (0)
0 2- C) z
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M 94 m 08 1 -01 S (0) (o
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0 x --4 20' MIN.
:3 0 -- = -- C) > :2
CL =s cy- (r) F- j- U) r-
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0 c: n M OFROADWAY
M 0) r
< 0
c: - M
co
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m mo
0 X

TEMPORARY SWALE

21 or FLATTER
\EXISTING GROUND
C min.

D min LEVEL

CROSS SECTION

DIMENSIONS

C. Depth 1.5' (includes 1/2' freeboard)
D. Bottom width 4'

CONSTRUCTION SPECIFICATIONS

1. All temporary swales shall have uninterrupted positive grade to an outlet.
2. Diverted runoff from a disturbed area shall be conveyed to a sediment
trapping device.
3. Diverted runoff from an undisturbed area shall outlet directly into an
undisturbed stabilized area at non-erosive velocity.
4. All trees, brush, stumps, obstructions, and other objectionable material shall
be removed and disposed of so as not to interfere with the proper
functioning of the Swale.
5. The swale shall be excavated or shaped to line, grade, and cross section as
required to meet the criteria specified herein and be free of bank projections
or other irregularities which will impede normal flow.
6. Fills shall be compacted by earth moving equipment.
7. All earth removed and not needed on construction shall be placed so that it
will not interfere with the functioning of the Swale.
8. Maximum Drainage area is 5 Acres.
9. Maximum Slope of Swale 8.0%.
10. Periodic inspections and maintenance must be provided.

Flow Channel Stabilization

Channel Grade Type of Stabilization-

0.5- 1.0% Seed and Straw Mulch
1.0%-2.5% Jute Matting (or equivalent)
with Straw Mulch
2.5-8.0% Sod Lining
Requires rock apron outlet (illustrated next page)

ROCK APRON OUTLET
PROTECTION

Y V V, Y Y Y Y Y R-4 Lining

SWALE A C
-A A A,A A A A 24 2
B 4

DIMENSIONS

A - 12' (Match with grades from outlet of swale)
B - 10' Length
C -16' Outlet End

CONSTRUCTION SPECIFICATIONS

1. Rock Aprons are required to reduce the outlet velocity of a swale to 3.0 f.p.s.
or less.

2. R-4 Rock has a maximum diameter of 12" and a minimum diameter of 3".

3. The placement of a layer of geotextile prior to installing the rock lining is
recommended.

4. Outlets must discharge to a stable non-erosive outlet.
@
0

DETAIL FOR STABILIZING WATERWAYS WITH JUTE
OR EXCELSIOR MATTINGS

A. Bury the top end of the matting strips in a
trench 6 inches or more in depth.

B. Tamp the trench full of soil. V4.
Secure with row of staples,
6 inch spacing, 4 inches
down from the trench. jr.

C. Overlap-bury upper end of lower
strip as in 'A'and '13'. Overlap i j" -
end of top strip 4 inches and
staple.
4 inch
4,
overlap of
matting strips
Ir- J.
where two or
more strip
.7 dths are
required.
Staples on
18 inch
D. Erosion stop - Fold of
centers
matting buried in
slit trench and
tamped; double
Staple outside
row of staple5.
edge on 2'
A.-
centers.
AA
jr-
A- -r.@

I$
r
.7.7.7.7
A-

TYPICAL STAPLES
X
% No. 11 Gauge Wire
A;
%

I %

1/2
1112

Rock Filter Details

PLAN VIEW B

T T T- --T

FLOW A

TYPICAL SECTION A-A

TOP OF BANK

1/2 D

2 2
1 1 1/2 D
INVERT "KAUMMUM

AASHTO #67 ROCK R2 ROCK
D Depth of water at channel
capacity.
D 1.5 feet

TYPICAL SECTION 13-13

6of

DESIGN:
(1) Rock filters will be constructed with AASHTO Number 67 and R-4 rock as
specified in Sections 703.2 and 850.2 of PennDOT's Publication 408.
(2) Free standing rock channel filters will be constructed to the dimensions
shown above.

MAINTENANCE:
(1) Rock filters will be removed when clogged with sediments. Materials must
be washed completely free of foreign materials or new rock used to rebuild
the filter.
(2) Accumulated sediment should be removed after each rainfall event.

RESTRICTIONS:
2
IZ@
Jr Poe
I

(1) Not for use in natural drainageways or steams.
(2) Use only in vegetated channels constructed as part of the project until the
channel has stabilized.

EMBANKMENT SEDIMENT TRAP

PROJECT NAME: SAMPLE TRAP
LOCATION: Low Hazard Erosion & Sediment Control Guide
PREPARED BY: DATE: SHEET# OF
CHECKED BY: DATE:

5ft
(F) ELV. @ 2000 CF/AC
(M) 9 B ELV. @ CLEAN OUT
AASHTO, #1

FILTER FABRIC
AASHTO #1 -Min. Size (6") THICK
AASHTO #57
Max. Size Required
Minimums

C)
144 A-
(ift)

AASH 0 #57 0 CLEAN OUT

FILTER FABRIC
TRAP NO.: A NOTE: Show all details and construction
DRAINAGE AREA: 1 ACRES ( 5 ac. max.) dimensions on plan drawings.
REO'D. CAPACITY: 2,000 - CUBIC FEET ( 2000 cf x # ac.
AVERAGE WIDTH: 20 FEET
AVERAGE LENGTH: 40 - FEET ( 10 ft. min.
LENGTH TO WIDTH: 2:1 RATIO ( 2:1 min.
AVERAGE DEPTH 2.5 - FEET ( 2 ft. min. ave. depth req'd.
ACTUAL CAPACITY A: 2,179 CUBIC FEET ( cap. at point A
CLEAN OUT ELEV. B: 1 foot FEET 700 cf x # ac.
SPILLWAY WIDTH C: 6 FEET 2 x # ac.)
SPILLWAY HEIGHT D: 2.5 FEET 4 feet max.
INSIDE SPILLWAY SIDE SLOPES vert = 1 Hor. = E: 2 (1:2 min)
OUTSIDE SPILLWAY SIDE SLOPES vert = 1 Hor. = E: 2 (1:2 min)
EMBANK. HEIGHT G: 3.5 - ( 5 feet max)

ELEV. AVE.AREA VOLUME CUMULATIVE VOLUME

0 16 x 36 576 S.f.

688 c.f. 688 c.f.

1 20 x 40 800 S.f.

928 c.f. 1,616 0.

2 24 x 44 1,056 S-f

563 0. 2,179 0.

3 2.5 26 x 46 1,196 s.f.

EMBANKMENT SEDIMENT TRAP

INSTALLATION:
(1) A trap should be installed in a location which captures the majority of the disturbed
area naturally.

(2) Traps must be able to de-water at least down to the clean out elevation.

(3) Stone outlets must have a top width of greater than 5 feet and side slopes to match
earthen berm.

(4) Geo-textile should only be placed as illustrated in detail

MAINTENANCE:
(1) Sediment should be removed from trap when sediment accumulates to the clean-
out level at a point halfway between the inflow of sediment laden run-off and the
outlet.

(2) A clean out stake should be placed at the location noted in item (1) with the clean
out elevation marked.

(3) The filter fabric on the outlet should be cleaned after each rainfall event.

(4) If the stone filter should become clogged it should be replaced.

RESTRICTIONS:
(1) Maximum drainage area to a sediment trap is 5 acres.

(2) Drainage areas include both disturbed and undisturbed areas.

(3) If a trap can not outlet to a natural waterway the outlet width should be 6 feet per
acre. Traps should only outlet to areas which are stable.

(4) Outlet traps only where they will not cause erosion or property damage.

DESIGN:
The design detail is included with a sample worksheet. The trap sample dimensions
should be suitable for most projects using this guide if the drainage area is one acre or
less. Use the worksheet - Appendix A - to alter the design for your sediment trap if
conditions require.

(Please make a copy for your use on site.)

EROSION AND SEDIMENT CONTROL PLAN
DEVELOPMENT GUIDE .......................................... NARRATIVE

1. Name of Responsible Individual:

Address: P.O.:

Phone Number: Zip Code:

2. Project is Located in what Municipality:

3. Has the municipality been contacted:

4. Tax parcel # for project site:

5. New home construction projects on lots purchased from a larger development,
should locate a copy of the erosion and sediment control plan for the development. If
applicable please give name of development, and list any special requirements:

6. Attach a copy of a general location map, and give written directions for locating the
project site in the space below:

1. GENERAL INFORMATION ON PROJECT

A. Briefly describe your project and extent of earthmoving:

C. Estimate dates for project start up and completion:

START: END:

D. Give the name of the nearest named receiving stream:

E. Have Wetlands been deliniated:
If no check justification

Hydric Soils, or possible wetlands are avoided

Wetlands do not exist

Other:

F. Soils information for the project must be provided:

(1) Soil Type (2) Is the Soil (3) Other
Hydric? Limitations

List soil symbol ex: (GeA2) for U.S.D.A. - Soil Survev

(2) - Hydric Soil lists are available from the Conservation District Office.

11. STORMWATER RUNOFF AND DRAINAGE

A. Are steep slopes in excess of 10% apart of your project, or are the immediate
surrounding areas ................................................... -
B. Offsite run-off onto your project must be controlled. Does off-site drainage
exist ...............................................................
C. Will your project increase run-off velocities or channelize stormwater run-off

*Note: All yes answers to the above questions must be addressed in your erosion and
sediment control plan with appropriate controls.

111. SEQUENCE OF CONSTRUCTION

In order for an erosion and sediment control plan to be effective all phases of
construction must take place in an orderly sequence. Every effort should be made to
minimize the amount of earth to be distributed, and limit the time disturbed earth is exposed
to the forces of erosion. The first step in nearly all projects would be the installation of
sediment barriers or trap below the project, and installation of any needed practices to
handle run-off onto the project. The sequence should then describe the various
construction steps necessary to complete the project, and end with the removal of all
temporary controls after final stabilization is complete. Please use the space below and label
each step in numerical order.

IV. TEMPORARY CONTROLS

This section is needed to detail any/all temporary erosion control practices that will be
implemented. List each control separately, explain why it is needed, and when it can safely
be removed. Drawings and designs for any practice not illustrated in this manual should be
attached and referenced in this section.

A. Check if applicable

Straw Bale Barrier Sediment Trap
Filter Fabric Rock Const. entrance
Temporary Swale Temporary Seeding
Rock Filters Other

List Other Controls:

B. Check if applicable

All items check above will be to the specifications of this guide.

Alternative controls and/or specifications are proposed and will be
attached.

V. PERMANENT CONTROLS

Prior to completion of the project state law requires that steps be taken to provide
permanent stabilization. All disturbed areas must be protected to prevent accelerated
erosion. In other words soil can not be left exposed. Re-established vegetation, rip-rap, and
pavement, etc. are examples of permanent controls. Re-vegetating an area descriptions
should include the seeding mixture to be used, top soil applications, lime, and fertilizer
instructions.

A. Check if applicable

Permanent Vegetation will be established per the recommendations of this
guide

Alternative specifications have been developed for re-vegetation and are
set forth on appendix B.

V1. MAINTENANCE PROGRAM

All erosion control practices require maintenance to function properly. Specific
requirements for maintenance are described on the design detail sheets. Please note the
following required maintenance procedures and check other applicable procedures for
control measures you will be using:

VI. Maintenance ........... continued

Required Until the site is stabilized, all erosion and sedimentation controls must be
maintained properly. Maintenance must include inspections of all erosion
sedimentation controls after each storm event and or a weekly basis. All
preventative and remedial maintenance work, including clean out, repair,
replacement, remulching, and renetting, must be performed immediately.
Required Should any measures contained within this plan prove incapable of
adequately removing sediment from on-site flows prior to discharge or of
stabilizing the surfaces involved, additional measures must be immediately
implemented by the property owner to eliminate all such problems.

Required After final site stabilization has been achieved, temporary erosion and
sedimentation controls must be removed. Areas disturbed during removal of
the controls must be stabilized.

(Check if Applicable)

Sediment must be removed where accumulations reach 1/2 the above ground
height of silt fencing.

Sediment must be removed where accumulations reach 1/3 the above ground
height of straw bale dikes.

Stormwater inlets must be protected until the tributary areas are stabilized,
and control measures maintained after each storm event.

Sediment must be removed from traps when storage capacities are reduced
to 1300 cubic feet per tributary acre.

Sediment traps must be protected from unauthorized acts of third parties.

Other:

VII. EROSION CONTROL PLAN - DRAWING

A plan drawing illustrating your erosion control plan is required. A blank plan has been
included to assist you in this effort. A sample plan using this sheet has been included in
appendix C. If a blueprint plan is available for your lot use it to develop your plan of inlieu of
the attached blank plan.

APPENDIX A

EMBANKMENT SEDIMENT TRAP

PROJECT NAME:
LOCATION:

PREPARED BY: DATE: SHEET# OF
CHECKED BY: DATE:

5ft
A, ELV. @ 2000 CF/AC
(F)
(M) ELV. @ CLEAN OUT
AASHTO #1
AASHTO #1 -Min. Size (6") THICK FILTER FABRIC
AASHTO #57
Max. Size Required
Minimums

(ift)
AASH 0 #57 1 0 CLEAN OUT
Z F
V FILTER FABRIC
TRAP NO.: NOTE: Show all details and construction
dimensions on plan drawings.
DRAINAGE AREA: ACRES ( 5 ac. max. )
REO'D. CAPACITY: CUBIC FEET ( 2000 cf x # ac.
AVERAGE WIDTH: FEET
AVERAGE LENGTH: FEET ( 10 ft. min.
LENGTH TO WIDTH: RATIO ( 2:1 min.
AVERAGE DEPTH : FEET ( 2 ft. min. ave. depth req'd.

ACTUAL CAPACITY A: CUBIC FEET ( cap. at point A
CLEAN OUT ELEV. B: FEET 700 cf x # ac.
SPILLWAY WIDTH C: FEET 2 x # ac.)
SPILLWAY HEIGHT D: FEET 4 feet max.
INSIDE SPILLWAY SIDE SLOPES vert = I Hor. = E: - (1:2 min)
OUTSIDE SPILLWAY SIDE SLOPES vert = 1 Hor. = E: - (1:2 min)
EMBANK. HEIGHT G: ( 5 feet max)

ELEV. AVE.AREA VOLUME CUMULATIVE VOLUME

3
B T

14 1

APPENDIX B

EIROSION AND SEDIMENTATION CONTROL PLAN

STANDARD WORKSHEET #8
TEMPORARY AND PERMANENT SEEDING SPECIFICATIONS

PROJECT NAME:
LOCATION:

PREPARED BY: DATE: SHEET# OF
CHECKED BY: DATE:

SPECIFICATIONS: The Department recommends the use of the Penn State Agronomy Guide
as the standard to use for the selection of species, seed specifications, mixtures, liming and
fertilizing, time of seeding and seeding methods. Specification for these items may also be obtained
from PennDOT's publication #408, Section 800 or by contacting the applicable county
conservation district. Upon selection of a reference, orlby individual development by the plan
preparer, the following Specification will exist for this project:

SOURCE OF SPECIFICATIONS:

(TEMPORARY) SPECIES':
% PURE LIVE SEED: %
APPLICATION RATE: LBS./ACRE
FERTILIZER TYPE: (X-X-X)
FERTILIZER APPL. RATE: LBSJACRE
LIMING RATE: LBSJACRE
FINAL DATE FOR SEEDING:

(PERMANENT) SPECIES-
% PURE LIVE SEED: %
APPLICATION RATE: LBSJACRE
FERTILIZER TYPE: (X-X-X)
FERTILIZER APPL. RATE: LBSJACRE
LIMING RATE: LBSJACRE
FINAL DATE FOR SEEDING:

If more than one species is used, indicate application rate for each species.

Itrosion bedi-ment UontroA rian

LEGEND AND SYMBOLS:
Landscape Features Conservation
Live Stream --------------- Diversion Ditch PROJECT:
SwaleorWaterway Sediment Trap DEVELOPED BY:
Riprap or Rocklined APPROX.
Slope or Grade DATE: SCALE:
Project Boundary Energy Dissipater
Earthmoving area STRAW BALE BARRI
ER DEE=
FABRIC FENCE a (9

Erosion & Sediment Control Plan

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LEGEND AND SYMBOLS:
Landscape Features Conservation PROJECT: Sil7gle Fomily Home
Live Stream Diversion Ditch V -
Swale or Waterway Sediment Trap DEVELOPED BY: -John BUIdder-
C

N
Slope or Grade Riprap or Rocklined M141y, APPROX. I x
DATE: 7/'Qo/ 9 a SCALE: I"=.
Project Boundary Energy Dissipater 0
STRAW BALE BARRIER
Earthmoving area
FABRIC FENCE

NOAA COASTAL SERVICES CTR LIBRARY

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