HomeMy WebLinkAboutWPO201800076 Checklist Erosion Control Plan 2014-12-01 Albemarle County Engineering
Erosion and Sediment Control Plan checklist for plan reviewers
Updated 1 Dec 2014
An erosion and sediment control plan is a document which illustrates the measures used to control erosion
and sedimentation during construction. All measures follow the Virginia Erosions and Sediment Control
Handbook.
Reference key;
[Square Brackets] are County Code references, {Curved Brackets} are policy references, and(regular
parenthesis)are explanatory. Links to reference documents are provided where possible.
App cation information:
Completed WPO application and fees, with owners signature [County Code 18-32.4.3.2,
18-32.3.9, 17 Article II] Erosion Control plans require a Water Protection Ordinance
(WPO) application and original owner's signature. No review is provided without
application, owner signature and fees. This is true even for revisions. It is important that
the owner be aware of comments and re-submittals, and this is the county assurance.
/''/4 Copies of federal and state permits for any wetland or stream disturbance. (Army Corps,
VDEQ, etc) [17-604, 18-32.1.2, 14-311]
VS P:
47 SWPPP, PPP, SWMP approvals obtained where necessary. In most cases, the erosion
control plan will not be submitted independently, but will be part of a Stormwater
Pollution Prevention Plan (SWPPP). Unless exempt, it will be approved with the
SWPPP.
Title information:
I Project title. Titles should be appropriate. It should be an erosion control plan, not a
stormwater plan, or site plan, etc. In some cases a WPO package will contain a
stormwater plan and a mitigation plan, but they should be on separate sheets with keys
and page titles.
✓ Professional seal, with original signature and date for professionally prepared plans.
✓ Content: The erosion control plan must not contain information regarding permanent
improvements that do not also appear on other plans. Erosion control plans are
temporary documents that are discarded after projects are complete.
Existing conditions plan view information:
✓ accurate current existing topography at the time of submittal, including all existing site
features, and any recent disturbances, all at a legible scale
,/ date and source of the topographic information: All topography should be at least visually
field verified by the designer within the last year. Adequate erosion control cannot be
designed without accurate topography and drainage areas.
WPO buffer limits: 100' from stream or wetland bank, 200' from reservoirs, or
floodplain limit if greater.
WA- No buffer disturbances without WPO Program Authority approval and a mitigation plan.
✓ floodplain limits, including 100yr flood limits for any channel with a drainage area of
50+ acres.
Albemarle County
Engineering E&SC Plan Checklist
Page 2 of 4
lif/ Floodplain undisturbed. Disturbances require a Special Use Permit or Floodplain
Development Permit.
M,4 all existing easements (access, drainage, sight, sanitary easements, etc.) with deed book
references, locations and dimensions
all critical slopes (typically shaded)
I Zoning Ordinance buffers shown and protected undisturbed. Disturbances require
Planning approval of a waiver.
Proposed plan view information:
Grag'ing:
,v' proposed topography at minimum 2' contour intervals—tied into existing contours, as
well as all proposed site features in later phases. (Sites with less than 6' of grade change
should consider using smaller contour intervals.) These should agree with other final
plans.
lproposed slopes are all 2:1 (horizontal:vertical) or flatter {Design Manual, section 81
proposed slopes steeper than 3:1 have low maintenance (not grass) ground cover
ispecified on the plan {Design Manual, Section 8}
existing critical slopes are not disturbed, unless a waiver or exemption has been granted
for the disturbance. [18-4.2, 14-304]
itO Retaining Wall Plans approved. Any walls supporting roads or necessary infrastructure
require engineered plans (not generic manufacturer's details) and computations. {Design
Manual, section 8{ This will also be required where walls are close to property lines and
there is the danger of affecting neighboring property, either during construction, with
later failures, or with pedestrian or vehicle safety.
Jfinal contour shapes and slopes ensure no un-drained pockets or stagnant pools
Narrative:
il narrative and project title (Narratives are now optional, and not reviewed by the County,
other than noting whether they are not seriously in error, like a boilerplate with another
County's name on it.)
project description
./ existing site conditions description
adjacent areas description
,/ off-site areas description including any off-site areas for borrow, waste or other
disturbance.
,j( special use permit for cut greater than 50,000cy in RA zoning
soils descriptions
/ County erosion control notes
/ stormwater runoff considerations: this can refer to the stormwater management
plan
PAsediment basin design computations summary for each sediment basin
• sediment trap design computation summary for each sediment trap
Erosion and sediment control measures:
,/ limits of clearing and grading encompassing all disturbances, entrances, staging and
parking areas, areas where sediment laden runoff will cross, or any construction related
activities. This must match any landscaping and conservation plans submitted with site
plans
Albemarle County
Engineering E&SC Plan Checklist
Page 3 of 4
Ia construction entrance (CE) draining to a sediment trap or basin
Nt dust control symbols (DC)
temporary and permanent seeding symbols (TS, PS)
/ existing drainage divides
I existing vegetation, with trees to be saved located by drip lines. This must match any
ilandscaping and conservation plans.
protection provided for all stages/phases of construction, from initial land clearing to
final grades and hardscapes. This is our most important item. Plans which show only
inlet protection on proposed drainage systems, which are only possible to install upon
Jcompletion of grading, may be denied without further review.
no erosion control measures in the way of construction access or grading. Diversion
dikes or silt fence are not placed in the middle of the site, or through access or grading.
Sediment traps are not under or on top of fill material or held up by retaining walls.
Construction entrances are not on fill, etc. If the concept for site protection is not
Jadequate in this regard,further review of the plan may not be possible.
existing soil boundaries are shown with labels. Areas already disturbed are indicated,
with constructed fill depth or cut noted.
critical erosion areas are identified; areas of constructed slopes, areas near property lines
adjacent off-site disturbances are shown with erosion control facilities
a stockpile location.
it//4 where cut or fill balances have a 10,000 cubic yard deficit or more, plans should not be
approved without a waste area identified. This must be on-site, or on another approved
and permitted site. (Don't make the inspectors chase trucks to find the dump site
✓ violation.)
a staging and parking area, or other construction related areas
diversion dikes are used to direct drainage to traps and basins
I/ silt fence is not used across contours in place of diversion dikes.
silt fence is limited to areas of sheet flow with '/4 acre per 100ft of level on-grade silt
fence. Plans showing only silt fence, without sediment trapping measures, should not be
J approved unless they meet this criteria and fill dirt is minimal.
all swales and low points at the perimeter of the site have a sediment trap or basin. Silt
fence in swales is typically not adequate. Check dams do not substitute for traps.
Diversions which travel more than 100ft, or go in and out of swales, are usually not
maintainable in the field. If the concept for site protection is not adequate in this regard,
✓ further review of the plan may not be possible.
temporary slope drains (TSD) or diversions are provided to prevent discharge over
disturbed or fill slopes
t`�ff inlet protection (IP) on all inlets
culvert inlet protection (CIP) on all culvert inlets
✓
outlet protection (OP) on all outlets
all watercourses are protected and encroachments minimized
f//4, stream crossing (USC,SC) and diversions are provided at all stream crossings.
I adequate channels (MS-19) provided for each outfall (see Design Manual for minimum
content)
all traps and basins are shown with proposed contours. Simple boxes or symbols are not
sufficient, in most cases, to determine layout or bond amounts.
Forlach trap;
drainage area is 3 acres or less
.
Albemarle County
Engineering E&SC Plan Checklist
Page 4 of 4
I sized for total drainage area, including those for in-line upstream facilities
wet storage is 67cy or more
I dry storage is 67cy or more
1/ wet storage is 4' deep or less
✓ wet storage side slope is 1:1 or flatter
dry storage side slope is 2:1 or flatter
stone weir is 6ft per acre of drainage area
4embankment
and stone weir height is 5' maximum from outside toe
embankment top width is adequate (see table 16 reference)
2:1 length:width ratio for flow path
For yach basin; (GB 3.14)
flt* sized for total drainage area, including those for in-line upstream facilities
wet storage is 67cy or more
dry storage is 67yr or more
wet storage side slope is 1:1 or flatter
dry storage side slope is 2:1 or flatter
embankment 15' high or less from downstream toe
principle and emergency spillways sized per handbook requirements
embankment has 1' freeboard during 25yr storm with emergency spillway
embankment has 2' freeboard during 25yr storm without emergency spillway
trash rack/ anti-vortex device specified per handbook requirements
riser anchor size specified per floatation computation
dewatering device sized for 6+hr drawdown of dry storage: 3-dia. minimum
safety fence and signs stating "danger, quick sand, do not enter"provided if near any
residential properties, or public access
structures and embankment match permanent design for facilities to be converted to
permanent stormwater management facilities
embankment top width is adequate (see Design Manual reference details)
2:1 length:width ratio for flow path. Baffles specified only on temporary structures
(p.III-79). Baffles are a big hassle in construction, and should not substitute for properly
dimensioned design if at all possible.
Detcyils:
✓ a paved construction entrance detail (see Design Manual reference details) for projects in
/ the development areas over 10 acres
a typical section for each temporary channel or diversion, referenced from the plan
sheets. Existing ground should be shown at the maximum cross-slope on the plan.
$1/4 details and copies of Program Authority permissions for any variances.
Mass or Early Grading:
r►/M mass grading Planning approval. (This is also called rough or early grading plans which
contain only approximate finished grades and culverts necessary to grade) Mass grading
can only be permitted within planned developments where a concept grading plan was
approved with the rezoning. The agent (Director of Planning) needs to formally
determine that the grading plan is in general conformity with the approved rezoning plan.
Otherwise, an initial site plan needs to be approved prior to issuance of a grading permit.
Issuance of a grading permit at the initial site plan stage, as apposed to after final plan
approval, requires specific approval from the County Engineer.
Albemarle County Engineering
Drainage Plan checklist for plan reviewers
Updated 1 Dec 2014
A drainage plans is typically a component of a road plan, site plan, or stormwater management plan. It
consists of the channel, ditch, culvert, and stormsewer design drawings, drainage maps, and computations
for hydrology and hydraulics.
Reference key;
[Square Brackets] are County Code references, {Curved Brackets] are policy references, and (regular
parenthesis)are explanatory. Links to reference documents are provided where possible.
A professional seal should be provided for any computation packages where are separate
from sealed plans.
Drainage: [18-32.6.2d, 14-305, 311]
,V drainage area maps (This is a basic element, and without this there is no review)
drainage computations (usually in the form of tables from the VDOT Drainage Manual
App. 9B-1 LD-2014, App.7B-1 LD-268, App., App.8B-1 LD-269, etc. -computations are
%./
a basic element, and without them there is no review)
all proposed and existing storm sewer must be shown in plan view
iv% for residential development, principle access free of flooding during the 25yr storm [14-
410]
,v/A• site runoff and entrances do not drain into streets (from VDOT Drainage Manual 9.4.5.2,
9.4.6.2)
concentrated runoff(1 cfs or greater) does not run across travelways/streets (as above
following VDOT design)
1 drainage does not run across, through, or backwater in dumpster areas [18-4.12.19]
/ overland relief is provided for any drainage structure or inlet in case of clogging. The
failure of any system will not cause structures, streets or yards to flood. {Policy;
direction of flow change (or deflection angle) in each drainage structure is 90 degrees or
greater(flow should not have to reverse direction) (from guide of VDOT Drainage
Manual 9.4.9.3.2.3)
labels on all drainage structures provided (and should match the drainage computations
and profiles)
4-4 provisions and easements for drainage across 3 or more lots. Dense development where
fencing, decking, sheds, patios, etc. are expected should provide yard inlets and pipes in
easements, rather than ditches {Policy}
Drainage profiles: (applicable to site plans, road and drainage plans) [14-311, 18-32]
drainage profiles for each pipe, structure or channel must contain:
dexisting ground
I/
proposed ground
any channel linings
all utility crossings
V a VDOT designation (MH-1, DI-3B, etc.) for each structure
Wit throat length for each drop inlet
A/M grate type for each grate inlet
a label on each structure to correspond with the computations
Albemarle County
Engineering Drainage Plan Checklist
/ Page 2 of 2
✓ material and strength class or gage of each pipe
manhole access every 300' for 15"-42" or 800' for 48" or greater
pipe slopes at 0.5% min. to 16% max. (per VDOT stnds for anchors over 16%)
l/VA concrete inlet shaping (IS-1) specified on any structure with a 4' or greater drop
A safety slabs (SL-1) in any structure taller than 12'.
top or rim elevation for each structure
all invert elevations for each structure (with positive flow drop between inverts).
✓ end sections (ES-1) or endwalls (EW-1) on all pipe outlets. Endwalls for culverts 48" or
italler
scour outlet protection at all outlets, corresponding to computations (Green Brook, OP)
Draipage computations: (applicable to any plan proposing pipes, channels, etc.)
Pipe omputations for all pipes
All proposed systems are designed within open channel flow capacities. (HGL
computations are not necessary, and should not be relied upon unless the entire
system is to be watertight.)
AO For systems within drainage easements, all proposed pipes are a minimum 15- in
/ diameter
IThere are no excessive outlet velocities (> 15fps)
r✓M Curb inlet computations for any curb inlets on grade
AO- All spreads are less than 10'
carryover is accounted for
100% capture at entrances so no flow runs out entrances into travel lanes
100% capture, or overland flow of capacity storm, to stormwater management
facilities. Typically stormwater management is designed to the l0year storm, and
inlets on grade often cannot capture this. Inlets in sumps should be used.
Wit Curb inlet computations for any curb inlets in sump conditions
A///4- All flow depths are below 6" in the capacity table
All spreads are less than 10'
V 100% capture to stormwater management facilities
Ditch computations for any ditches
ditch linings specified per plans meet velocity requirements
a Culvert computations for any culverts
J headwaters < 1.5 x culvert height, and 18" below shoulder elevation of streets.
Outlet protection computations for all outlets
dimensions and stone sizes for all outfalls
✓ Pro osed pipe and inlet drainage area map
limits of all areas and sub-areas draining to proposed structures, and existing
structures or channels which will be impacted
,/ acreage of each drainage area as used in computations
hydrologic coefficient for each drainage area as used in the computations
time of concentration for each drainage area as used in the computations
destination structure labeled for each drainage area (if not obvious)
LINE I- GRADE
CIVIL ENGINEERING
SUBMISSION COVER LETTER
TO: John Anderson& Frank Pohl
Albemarle County Department of Community Development
401 McIntire Road
Charlottesville,VA 22902
FROM: Daniel C. Hyer, PE
Line and Grade I Engineer of Record
DATE: October 18th, 2018
RE: Misty Mountain Campground
Erosion &Sediment Control and Grading Plan
Albemarle County,Virginia
On behalf of Mike Leo,we submit the above referenced site plan for review.
Please find the following documentation attached:
1—VESCP Application
1—VESCP Application Review Fee (Check#21952, $300)
1—Floodplain Development Permit Application
1—No Impact to Floodplain Certification Memorandum
1—Erosion&Sediment Control Plan Checklist
1—Drainage Plan Checklist
2—Full Size Plans
Please contact our office with any questions or concerns.
LINE +
GRADE
CIVIL ENGINEERING
113 4th St.NE;STE 100
CHARLOTTESVILLE,VA 22902
TEL:(434)262-0169
LINE-GRADE.COM
dF
_ COUNTY OF ALBEMARLE
• Department of Community Development
N ** 401 McIntire Road
Charlottesville,Virginia 22902
VSMP Application Completeness Check
Project Title: r �
File Number: w ��cr-tn�� -"t"' i�CsZC
Date: 10 --t� _� , "2, b7(0 VE
Reviewer:
Your application has been checked for completeness per section 17-409 of the County Code. All
items must be received and correct for the application to be deemed complete.
❑ This application is complete and plan review has begun
❑ This application is not complete. Please provide the missing items
checked below.
Received
Correct
Y N Y N N/A
❑ Completed application ❑ ❑ ❑
,V❑ Signatures of the Property Owners for each parcel affected ❑ ❑ ❑
��❑ Correct Fees Paid ❑ ❑ ❑
❑ ❑ Registration Statement on the official DEQ form, with correct LDA ❑ ❑ ❑
❑ ❑ Erosion and Sediment Control Plan satisfying the requirements
of code section 17-402. ❑ ❑ ❑
❑
mo------`Stormwreraeznen requirements of code
section 17-403. ❑ ❑ ❑
❑ ❑ Pollution Prevention Plan satisfying the requirements of code
section 17-404. The EPA template should be used. ❑ ❑ ❑
❑ ❑ Stormwater Pollution Prevention Plan satisfying the requirements
of code section 17-405. The EPA template should be used. ❑ ❑ ❑
❑ k Mitigation Plan satisfying the requirements of code section
17-406.for any proposed disturbance of stream buffers. ❑ ❑ ❑
❑ A' Requested Variations or Exceptions as provided in code sections
17-407 and 408, if applicable. (SSF,MMT,etc) 0 ❑ 0
❑ k Construction Record Drawings(as-builts) for any existing facilities
in the proposal satisfying the requirements of code section 17-422. ❑ ❑ ❑
Comments:
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