HomeMy WebLinkAboutZMA202100009 Other 2022-02-07OLD IVY RESIDENCES
PRESERVED SLOPES
ZONING MAP AMENDMENT
ZMA 2021-00009
JULY 19, 2021
AMENDED: NoVEMBER 15T", 2021
AMENDED: FEBRUARY 7`H, 2021
PREPARED BY:
TIMMONS GROUP
YOUR VISION ACHIEVED THROUGH OURS.
608 PRESTON AVENUE, SUITE 200
CHARLOTTESVILLE, VA 22903
BRYAN CICHOCKI, PE
Introduction
A zoning map amendment is being requested per Section 30.7.6 of the Albemarle County Zoning
Ordinance, to convert an area of preserved slopes to managed slopes within the Old Ivy Residences
proposed development. The slopes that are being requested for reclassification, while 25% or greater in
slope, are misclassified as preserved slopes and better described as managed slopes, as they are
manufactured, which is made evident from previous documented site plans. Furthermore, the overall
development plan is to reduce the area of these steep slopes, laying back the slopes, further reducing
concerns of erosion and downhill degradation of waterways.
While these slopes are being requested to be changed to managed slopes, there is a recognition of the
County's goal, related to steep slopes, to reduce "rapid and/or large-scale movement of soil and rock,
excessive stormwater run-off. siltation of natural and man-made bodies of water. loss of aesthetic
resource ... all of which constitute potential dangers to the public health, safety and/or welfare." With
that in mind, this application will discuss the following related to the conversion of these slopes to
managed slopes:
• Explore the existing conditions and designation of this area as preserved slopes versus managed
slopes.
• Protection and enhancement of adjacent and downstream land.
• Mitigation efforts to eliminate effects of slope impacts
Existing Conditions
The property containing the currently designated preserved slopes within the development (parcels
06000-00-00-024C3, 06000-00-0024C4* and 06000-00-00-024C1*) is located off Old Ivy Road and the
2S0/29 bypass within Albemarle County. The subject portion of the property is adjacent to parcels
06000-00-00-024C and 06000-00-00-05100 (which are under the same ownership) to the east and the
250/29 bypass to the west, as shown below:
*Note: TMP 60-24C4 was "created" by virtue of certificate of take (C-798017) at D.B. 1761, PG.
614. The certificate of take was then invalidated by the order found at D.B. 5330, PG. 110 and
ownership reverted to the Now Filthy Beast, LLC. The invalidation of the certificate of take had
the legal effect of eliminating the boundary between parcels 24C4 and 24C1, such that now
they are once again combined into a single 5-acre parcel 24C1. Thus, the steep slopes being
requested to be amended are within parcel 24C1 despite being shown in parcel 24C4 on the
County GIS. Further, the surveyed location of the lot line (certificate of take) between lots
24C4 and 24C1 was found to be in a different location than Albemarle County GIS shows which
also places preserved slopes on parcel 24C1. As such, reference to parcel 24C1 has been
retained in this request.
1)Page
Figure 1: Slopes to be converted to Managed Slopes
Per Albemarle County GIS, there are designated preserved slopes on this parcel, comprising an area of
approximately 1.55 acres (outlined in green above). Per Section 30.7.3, the origin of preserved slopes is
defined as natural features protected by county action from land disturbing activities. However, both of
the preserved slope areas identified on -site appear to be the result of human activities. Historical
imagery shows that slope "A" (adjacent to the 250/29) was a result of activity on the site in the early
1990's. Slope "B" was a result of waste fill generated from the North Grounds Connector Road project in
the mid 2000's (see Figure 2 & Appendix A for further details). Under normal conditions outlined in
Section 30.7.3a, this would likely lead to the classification of these steep slopes as managed slopes;
however, they are currently classified as preserved slopes. We believe that the history of these slopes is
an important factor in the consideration of this zoning map amendment to reclassify the slopes as
managed.
2 1 P a g e
Highway':,.
Figure 2: Excerpt from North Grounds Connector Rood Project
Protection of Adjacent and Downstream Land
Protection of adjacent and downstream land is an important consideration for any development, but
particularly one that has both intermittent and perennial streams located within it. As noted below,
development has been located to limit removal of forested areas, while protecting the natural area of
the Rivanna Trail. Additionally, the impacts to the slopes will reduce the steepness of these areas, as
well as the overall runoff across these slopes, reducing risks of erosion and/or slope failure.
Proposed with the Old Ivy Residences rezoning application is a new residential development on the
subject property. The proposed development has been laid out to limit disturbance to the steep slopes,
while maximizing the conservation of forested areas, particularly adjacent to the existing Rivanna Trail,
as much as possible (see Figure 3). Specifically, the development layout focuses on utilizing space
already impacted by the existing farmland to minimize the disturbance to the surrounding forested
areas, as well as some of the managed slopes which are identified in these areas. By impacting a portion
of the currently designed preserved slopes, the neighborhood layout can better preserve existing
natural forest, which provides an invaluable amenity to the neighborhood, prevents additional
environmental concerns associated with deforestation (erosion, stormwater quality, habitat, etc.), and
provides a greater degree of conservation. Given the history of the slopes on -site, Greystar and the
design team agree that these forested areas hold a higher environmental value on the site than the
previously disturbed, man-made slopes.
Moreover, the impact to these slopes will result in a reduction to the stormwater that drains across this
area, as the slopes will be reduced (the grade proposed is to cut these areas down in elevation), while
3(Page
also capturing runoff in a stormwater conveyance (pipe) system, reducing overland flow and the total
amount of runoff that these steep slope areas currently are subject to from a stormwater volume
perspective. This change will result in a reduction to the potential of erosion over the remaining slopes,
since those areas will see a limited amount of drainage over top of them.
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1PACT
AREAS
Figure 3: Residential Layout to Minimize Impacted Forested Area
The proposed impacts to the existing preserved slopes are as shown in Figure 4 below and included in
Appendix A:
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Figure 4: Areas of Preserved Slope Disturbance On -site
Mitigation Efforts
In order to protect downstream land, adequate erosion control measures reviewed and approved by
Albemarle County will be implemented during construction to mitigate runoff while preserved slope
disturbance takes place. More specifically, downstream measures, such as wired -backed silt fence and
sediment traps/basins will be required. Each of these measures will be placed in a way to ensure
protection of the downstream lands, including the pond and beyond.
Furthermore, the overall project is proposing to desilt and improve the existing pond to enhance the
ecological benefits for the local habitat, improve the environmental impacts by adding vegetation and
aquatic benching, while providing volume to meet stormwater quantity requirements.
Summary of Justification for Rezoning
While the steep slopes overlay district strives to protect preserved slopes within the County, it also
affords relief through the zoning map amendment process when certain slopes are outside the criteria
of those considered preserved slopes. Given that these preserved slopes were previously disturbed and
generated by construction and waste fill, it stands to reason that they should be considered managed
slopes. Additionally, even with this designation, the proposed impacts will further enhance the
downstream waterways. While the proposed impacts do reduce the steep slopes within Albemarle
5 1 P a g e
County, they ultimately enhance and improve downstream receiving waters, providing a betterment for
the County, environment, and future population that resides at the Old Ivy Residences.
As further justification for reclassifying these slopes, a critical analysis of each section of the zoning
ordinance regarding the classification of slopes and how they relate to the slopes in this request is
included below:
Managed slopes. The characteristics of managed slopes are the following:
N the contiguous area of steep slopes is limited or fragmented;
The two areas of steep slopes are not contiguous and are separated from each other.
There are no other steeps slopes in close proximity.
00 the slopes are not associated with or abutting a water feature, including, but not limited
to, a river, stream, reservoir or pond;
While there is a man-made pond nearby on the property, these slopes are not located in
close proximity where they would be considered associated with this water feature.
(iii) the slopes are not natural but, instead, are manufactured,
As described in further detail in this narrative, these slopes are manufactured.
(iv) the slopes were significantly disturbed prior to June 1, 2012;
Slope "A", as shown on historical imagery, was a result of activity on the site in the early
1990s. Slope "B" was a result of waste fill generated from the North Grounds Connector
Road project (now known as Leonard Sandridge Road) in the mid-2000s as shown in
Figure 2 & Appendix A. Additionally, these slopes appear to have been created prior to
the adoption of the Water Protection Ordinance in 1998.
(v) the slopes are located within previously approved single-family residential lots, or
The slopes are not located within previously approved single-family residential lots.
(vi) the slopes are shown to be disturbed, or allowed to be disturbed, by a prior county action.
While the slopes have not been shown to be disturbed in a prior County action, since
UVA is not subject to County requirement, the North Ground Connector Road project
(now known as Leonard Sandridge Road) did not have to go through County approvals,
however, there is a plan that shows the creation of Slope "B" with that project. We have
not found prior approval for the creation of Slope "A", however it is clear in the
historical imagery that these slopes were man-made in the 1990s. Additionally, these
slopes appear to have been created prior to the adoption of the Water Protection
Ordinance in 1998.
Preserved slopes. The characteristics of preserved slopes are the following:
(i) the slopes are a contiguous area of 10,000 square feet or more or a close grouping of
slopes, any or all of which may be less than 10,000 square feet but whose aggregate area
is 10,000 square feet or more;
Both areas of slopes are contiguous of 10,000 square feet or more.
the slopes are part of a system of slopes associated with or abutting a water feature
including, but not limited to, a river, stream, reservoir or pond,
While there is a man-made pond nearby on the property, these slopes are not located in
close proximity where they would be considered associated with this water feature.
the slopes are part of a hillside system;
The slopes are not a part of a hillside system, but rather are located near a major
roadway system.
(iv) the slopes are identified as a resource designated for preservation in the comprehensive
plan;
The slopes are identified as preserved within the master plan, however, these slopes are
manufactured and therefore, should not be considered a resource.
(v) the slopes are identified as a resource in the comprehensive plan;
The slopes are identified as preserved within the master plan, however, these slopes are
manufactured and therefore, should not be considered a resource.
(vi) the slopes are of significant value to the entrance corridor overlay district; or
The ARB staff planner, Margaret Maliszewski, has not identified these slopes as
significant value to the entrance corridor overlay district. Nor do we have any reason to
believe that these man-made slopes add value to the entrance corridor.
(vii) the slopes have been preserved by a prior county action, including, but not limited to, the
placement of an easement on the slopes or the acceptance of a proffer or the imposition of
a condition, restricting land disturbing activity on the slopes.
The slopes have been identified as preserved within the master plan, however, these
slopes are manufactured, a result of construction and waste fill.
71
Appendix A
OLD IVY HISTORICAL IMAGERY
NORTH GROUNDS CONNECTOR ROAD PROJECT WASTE FILL PLANS
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NOTE: THIS PLAN IS FOR EROSION CONTROL PURPOSES ONLY!
NORTH GROUNDS -
CONNECTOR ROAD
PROJECT SITE
PROPOSED WASTE
AREA SITE
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DCR Minimum Standards
MS-1 Permanent or temporary soil stabilization shall be applied to denuded areas within
seven days after final grade is reached on any portion of the site. Temporary soil
stabilization shall be applied within 7 days to denuded areas that may not be at final grade
but will remain dormant for longer than 30 days. Permanent stabilization shall be applied
to areas that are to be left dormant for more then one year.
MS-2 During construction of the project, soil stockpiles and borrow areas shall be
stabilized or protected with sediment trappings measures. The applicant is responsible for
the temporary protection and permanent stabilization of all soil stockpiles on site as well
as borrow areas and soil intentionally transported from the project site.
MS-3 A permanent vegetative cover shall be established on denuded areas not otherwise
permanently stabilized. Permanent vegetation shall not be considered established until a
ground cover is achieved that is uniform, mature enough to survive and will inhibit
erosion.
MS-4 Sediment basins and traps, perimeter dikes, sediment barriers and other measures
intended to trap sediment shall be constructed as a first step in land -disturbing activity
and shall be made functional before upslope land disturbance takes place.
MS-17 Where construction vehicle access routes intersect paved or public roads,
provisions shall be made to minimize the transported onto a paved or public road surface,
the road surface shall be cleaned thoroughly at the end of each day. Street washing shall
be allowed only after sediment is removed in this manner. This provision shall apply to
individual development lots as well as to larger land disturbing activities.
MS-18 All temporary erosion and sediment control measures shall be removed within 30
days after final site stabilization or after the temporary measures are no longer needed,
unless otherwise authorized by the local program. Trapped sediment and disturbed soil
areas resulting from the disposition of temporary measures shall be permanently
stabilized to prevent further erosion and sedimentation
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Erosion and Sediment Control General Notes:
E-1 The temporary erosion and siltation control items shown on the E&S Control Plan
are intended to provide a general plan for controlling erosion and siltation within the
project limits. The E&S Control Plan is based on field conditions at the time of plan
development and an assumed sequence of construction. The contractor, in conjunction
with Project Engineer and/or Environmental Monitor, shall adjust the location, quantity
and type of erosion and siltation control items required based on the actual field
conditions encountered at the time of construction and the selected sequence of
construction.
E-6 Silt removal and sediment clean -out from erosion and siltation control items shall be
performed in accordance with following:
Temporary Sediment Basins and Sediment Traps — When the "wet" storage volume
(permanent pool) has been reduced by 50%.
Dewatering Basins — When the excavated volume has been reduced by 50%
All other Erosion and Siltation Control items — When the capacity, height or depth has
been reduced by 50%.
HIKING TRAIL NOTE:
Currently an existing hiking trail (not shown on the plan)
runs through the proposed waste area. A satisfactory
detour will need to be approved and proper signage will
need to be installed after construction. All hiking trail
arrangements shall be coordinated with Dick Lawrence.
DETAIL 1
SECTION A -A
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SECTION A -A
NOTES,
IS
SECTION A -A
1. FOR WXT,,r LIE WMLATIr DI ENS,SN S IS ro GOVERN THE PROTECTION
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WHERE NO
TO BE N ACCORDAICE WAIN OCTAL 2 SHOWN ABOVE,
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3, CEOICKRE FMTO eE NSTA M UNDER ALL EROSION CONTROL STORE IN
ACCORCHHU WINE,NN THE SPECVICATIONS.
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NOTE:
1. THE CHANNEL CREATED BIRDS) INC ONE S L IMVE A POSTNE MADE TO A STMIU2ED OUTLET-
INC CFA I SHALL BE STA,LP,M, AI NECESSARY, TD PREVENT EROSION.
2, JEWORMY M RSFCN DIRE WILL BE MEASURED ANTI PAD FOR N MCCRDANCE WITH SECTION 303
OF IRE SPECIFICATIONS,
TEMPORARY DIVERSION DIKE
VIRWM WM14ENT OF IOMSP04TAMN
303
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TYPICAL DETAIL FOR TEMPORARY
TYPICAL DETAIL FOR TEMPORARY FILTER
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REFERENCE
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242
303
VIRGFIA DEPARTMENT OF TRANSPORTATION
M 00
Diversion Dikes, Rock check Dams and/or Temporary
Slope Drains will be provided as required to direct and
maintain flow to the north side of the.pool and to prevent
erosion of channels leading to the basin
GENERAL NOTES:
1. THE CONTRACTOR SHALL CONTACT "MISS UTILITY OF VIRGINIA" (1-800-552-7001)
AT LEAST 48 HOURS PRIOR TO BEGINNING WORK IN ORDER TO DETERMINE THE EXTENT
AND LOCATION OF ALL UNDERGROUND UTILITIES WITHIN THE PROJECT LIMITS.
UTILITY COMPANIES WILL BE NOTIFIED THROUGH "MISS UTILITY" PRIOR TO ANY
EXCAVATION OR GROUND PENETRATION.
2. ALL CONSTRUCTION METHODS AND MEASURES ARE TO BE IN ACCORDANCE WITH V.D.O.T.
ROAD AND BRIDGE SPECIFICATIONS DATED 2002, THE ROAD AND BRIDGE STANDARDS
DATED FEB. 1, 2001. AND THE VIRGINIA WORK AREA PROTECTION MANUAL
DATED JAN., 2003.
3, GRADING OF ALL SLOPES SHALL BE KEPT TO A 2:1 MAXIMUM.
SURVEY INFORMATION NOTE:
THIS PLAN IS BASED ON TOPOGRAPHIC AND SURVEY INFORMATION SUPPLIED TO
FAULCONER CONSTRUCTION COMPANY BY PARSONS, BRINKERHOFF. GUADE AND
DOUGLAS, INC. IT IS OUR UNDERSTANDING FROM FAULCONER CONSTRUCTION
COMPANY THAT WE ARE AUTHORIZED TO USE IT FOR THE PURPOSE OF CREATING
A WASTE AREA PLAN.
Disposal Areas Note
Based on Memorandum of Agreement with
Virginia Department of Environmental Quality
And Current Solid Waste Regulations
Materials that cannot be disposed of in a disposal area:
• Antifreeze
• Asphalt (liquid)
• Building forms
• Concrete with exposed rebars
• Curing compound
• Fuel
• Hazardous materials
• Limbs
• Lubricants
• Metal
• Metal pipe
• Oil
• Paint
• Stumps
• Tree trunks
• Wood or metal from building demolition
Materials that may be disposed of in an approved disposal area:
• Asphalt (solid)
• Brick
• Cinder block
• Concrete (without exposed rebars)
• Dirt
• Rock
Disposal areas located on VDOT rights -of -way must be covered with 2-feet of
clean material, placed on a maximum 2:1 slope, and seeded with the seed mix
recommended on the Roadside Development Sheet or with a recommendation
from the Transportation Roadside Development Manager. If the area is
predominately wet or has plants that appear to be wetland species — have the
District Environmental Section look at it before placement of materials.
Disposal areas located on private property must be covered with 2-feet of
clean material placed on a maximum 3:1 slope and seeded with the seed mix
recommended on the Roadside Development Sheet or with a recommendation
from the Transportation Roadside Development Manager. If the area is
predominately wet or has plants that appear to be wetland species avoid
placement of material.
Stumps should not be buried either on or off state rights of way. However, if
they are buried solid and vegetative waste regulations must be followed. These
include:
• Notification of all adjoining property owners 14-days prior to opening the
vegetative waste disposal site.
• Survey of site before material is buried and record in local courth
ouse.
■ Survey at time of closure showing location of all materials buried, recording
with property information in local courthouse.
• Notification of all adjoining property owners within 48-hours of closure.
• Installation of groundwater and methane gas monitoring wells.
• Monitoring materials collected in wells and reporting annually to Virginia
Department of Environmental Quality on findings.
• Providing corrective measures should pollutants be detected in wells.
Stumps and tree trunks (non -merchantable timber may be ground into
mulch, stockpiled, and beneficially used. If stockpiled, the pile must be reduced
by 75% within 12-months. Ground chips may be given away for use as mulch or
fuel. Ground chips may be used to stabilize bare areas, however, they should
not be piled more than 2-inches in depth if used for this purpose.
TABLE OF CONTENTS
SHEET 1 — COVER SHEET — NOTES, MISCELLANEOUS DETAILS
SHEET 2 — EXISTING SITE CONDITIONS
SHEET 3 — PROPOSED WASTE AREA GRADING AND
EROSION CONTROL MEASURES
SHEET 4 — SEDIMENT BASIN DETAILS AND NOTES
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REVISIONS
APRIL 14, 2005
VDOT & DCR
COMMENTS
DATE
Jan. 6, 2005
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PLAN FOR PROPOSED WASTE AREA
IN CONJUNCTION WITH THE
NORTH GROUNDS
CONNECTOR ROAD PROJECT
EXISTING SITE CONDITIONS
ALBEMARLE COUNTY, VIRGINIA
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ROUDABUSH, GALE & ASSOCIATES, INC.
ENGINEERING, SURVEYING AND LAND PLANNING
® A PROFESSIONAL CORPORATION
SERVING VIRGINIA SINCE 1956
914 MONTICELLO ROAD - CHARLOTTESVILLE, VIRGINIA 22902 s r
PHONE 434-977-0205 - FAX 434-296-5220 - EMAIL INFO@ROUDABUSH.COM
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SEDIMENT BASIN SCHEMATIC
ELEVATIONS
DESIGN HIGH WATER
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67 C.Y./ AC. -
"DRY " STORAGE
67 C.Y./ AC. -
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SEDIMENT CLEANOUT
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RISER CREST
DEWATERING
DEVICE
ANTI -SEEPAGE COLLAR
DESIGN ELEVATIONS WITHOUT
EMERGENCY SPILLWAY
(RISER PASSES 25-YR. EVENT)
SEDIMENT BASIN DATA
5 : 1
SLOPES
PLATE. 3.14-2
TOP OF RISER = 597.0
INV. OUT (RISER) = 590.0
65' - 16" CMP @ 3.08%
INV. OUT (PIPE OUTFALL) = 588.0
CLEANOUT ELEV. = 592.5
APPROXIMATE BOTTOM OF BASIN = 590.0
TOP OF DAM = 600.0
DEWATERING ORIFICE INV. = 594.25
DEWATERING ORIFICE DIA. = 4"
FLEXIBLE TUBING DIA. = 6"
INSTALL 6' x 6' ANTI -SEEPAGE COLLAR
4' FROM RISER
RISER PIPE BASE CONDITION`D
FOR EMBANKMENTS
SOURCE: VA. DSWC
ALL AROUND
#5 X 12"—
SPACER BAR
(TYPICAL)
HLAft. J.14-19
RECOMMENDED DEWATERING
SYSTEM FOR SEDIMENT
BASINS
PROVIDE ADEQUATE
STRAPPING
POLYETHYLENE CAP
(0.5' BELOW TOP OF RISER)
DEPTH
-- - VARIES AS
TACK WELD - -- REQUIRED
ERFORATE❑ POLYETHYLENt FOR "DRY "
DRAINAGE TUBING. DIAMETE STORAGE
_ ' VARIES (SEE CALCULATIONS N
\ APPENDIX 3.14-A)
4 WET
"FERNCO-STYLE COUPLING STORAGE
DEWATERING ORIFICE,
SCHEDULE 40 STEEL STUB 1-FOOT MINIMUM,
DIAMETER VARIES (SEE CALCULATIONS IN
CORRUGATED METAL RISER APPENDIX 3.14-A)
NOTE: WITH CONCRETE RISER, USE PVC SCHEDULE 40 STUB
FOR DEWATERING ORIFICE
SOURCE: VA. DSWC
DRAINAGE TUBING SHALL COMPLY WITH ASTM F667
AND AASHTO M294
PLATE. 3.14-15
ANTI— VORTEX DEVICE DESIGN
�— NOT REQUIRED
PLAN VIEW
D _I
RISER DIAMETER
r�
I 24" I
SECTION A -A
A O O TOP STIFFENER (IF REQUIRED)
J�IA1 IS X- X— ANGLE WELDED
TO TOP AND ORIENTED PER-
PENDICULAR TO CORRUGATIONS.
O O TOP IS— GAGE CORRUGATED
METAL OR 1/B" STEEL PLATE.
O
PRESSURE RELIEF HOLES MAY
BE OMMITTED, IF ENDS OF
CORRUGATIONS ARE LEFT FULLY
OPEN WHEN THE TOP IS
ATTACHED.
WE DED CYLINDER IS �6 GAGE CORRUGATE
METAL PIPE OR FABRICATED FROM
1/B"
H 13" STEEL PLATE.
NOTES: INDER
N L
�� 1FIR TOP OFLTHE RISER.
T
FIRMLY FASTENED TO THE
UPPORT BAR SIZE
(#6 REBAR MIN.)
ISOMETRIC
2. SUPPORT BARS ARE WELDED
TO THE TOP OF THE RISER
OR ATTACHED BY STRAPS
BOLTED TO TOP OF RISER.
DETAILS OF CORRUGATED METAL
ANTI —SEEP COLLAR
IWATIONS VERTICAL
OLLAR TO BE OF SANE GAGE AS THE
PIPE WITH WHICH IT IS USED
CONTINUOUS WELD—�
/i'/
X
SLOTTED HOLES FOR
f2' NIN.
METER BOLTS
3/8' DIAMETER
3/8
3
T
BAND
WELD BOTH sloes
SLOTTED
HOLES
CORRUGATED METAL
�ONT INUGUS WELD
AT B' ``
SECTION B-B
SHEET WELDED TO
CENTER OF BAIID
ELEVATION OF UNASSEMBLED COLLAR3. UNASSEMBLED COLLARS SHALL BE MARKED BY
NOTES FOR COLLARS: PAINTING OR TAGGING TO IDENTIFY MATCHING
PAIRS.
1. ALL MATERIALS TO BE IN ACCORDANCE WIT4i THE LAP BETWEEN THE TWO HALF SECTIONS
CONSTRUCTION AND CONSTRUCTION MATERIAL AND BETWEEN THE PIPE AND CONNECTING BAND
SPECIFICATIONS. SHALL BE CAULKED WITH ASPHALT MASTIC AT
2. WHEN SPECIFIED ON THE PLANS. COATING OFTIME OF INSTALLATION.
COLLARS SHALL BE IN ACCORDANCE WITH 5. EACH COLLAR SHALL BE FURNISHED WITH TWO
CONSTRUCTION AND CONSTRUCTION MATERIAL 1/2" DIAMETER RODS WITH STANDARD TANK
SPECIFICATIONS. LUGS FOR CONNECTING COLLARS TO PIPE.
DETAIL OF HELICAL PIPE
ANTI —SEEP COLLAR
XELO 1 f/B' X 1 1/8' X 1 1/8' AND ES TO COLLAR OR BEND A 90
SIZE AND SPACING OF SLOTTED ANGLE 1 1/8' WIDE AS SHOWN IN DRAWING.
OPENINGS SHALL BE THE SAME NOTE FOR BANDS AND COLLARS:
AS SHOWN FOR CM COLLAR. 1f/e• MODIFICATIONS OF THE DETAILS
ISOMETRIC
USE RODS AND LUGS TO CLAMP � SHOWN MAY BE USED PROVIDING
BANDS SECURELY TO PIPE.EQUAL NAT RTIGHTNESS IS
MAINTAINED AND DETAILED
12' MIN. A \ DRAWINGS ARE SUBMITTED AND
APPROVED BY THE ENGINEER PRIOR
TO DELIVERY.
8AND OF
HELICAL PIPE4uETM cm i AR RNAI L BE CUT TO FIT
ROD AND LUG I MELDED WITH A CONTINUOUS WELD.
NOTE: FOR DETAILS OF FABRICATION DIMENSIONS, MINIMUM GAGES,
SLOTTED HOLES, AND NOTES, SEE DETAIL ABOVE.
METAL COLLAR TO BE NOTE: TWO OTHER TYPES OF ANTI -SEEP COLLARS ARE:
WELDED TO CENTER OF
HELICAL PIPE BAND i. CORRUGATED METAL. SIMILAR TO UPPER, EXCEPT SHOP
WELDED TO A SHORT (4FT.) SECTION OF THE PIPE AND
CONNECTED WITH CONNECTING BANDS TO THE PIPE.
PARTIAL ELEVATION 2. CONCRETE, SIX INCHES THICK FORMED AROUND THE PIPE
REF: ENGR. FIELD MANUAL WITH #3 REBAR SPACED 15" HORIZONTALLY AND VERTICALLY.
SOURCE: USDA-SCS
PLATE. 3.14-13
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