20201172 Ver 1_Erosion and Sed Control Plan_20200908

'-4 0
1jivers ENGINEERS
& ASSOCIATES, INC.
PLANNERS
SURVEYORS
LANDSCAPE ARCHITECTS
SOIL EROSION AND SEDIMENTATION CONTROL PLAN
NARRATIVE
ADVENTURE PARK
CITY OF GREENVILLE, PITT COUNTY, NORTH CAROLINA
August 18, 2020
Matthew J Prokop, PE
107 E. Second Street, Greenville, NC 27858 a PO Box 929, Greenville, NC 27835 W Phone: [phone] - Fax: [phone]
NCBELS Lic. No. F-0334 www.riversandassociates.com NCBOLA Lic. No. C-312

TABLE OF CONTENTS
I. Project Description
II. Site Description
III. Adjacent Property
IV. Soils
V. Planned Storm Water Management and
Erosion and Sedimentation Control Measures
VI. Construction Schedule
Phase 1. Clearing and Grubbing Phase
Phase 2. Clearing and Grubbing Phase
VII. Maintenance Plan
VIII. Vicinity Plan
IX. Vegetation Plan
X. Ground Stabilization
XI. Self -Inspection and Reporting Requirements
XII. Erosion and Sedimentation Control Devices
XIII. Temporary Seeding
XIV. Specification and Details
6.02 Land Grading
6.06 Temporary Gravel Construction Entrance
6.14 Mulching
6.51 Hardware Cloth & Gravel Inlet Protection
6.60 Temporary Sediment Trap
6.62 Temporary Sediment Fence
Appendices
Appendix A:
NCGO1 Ground Stabilization and Materials Handling
NCGO1 Self Inspection, Record Keeping and Reporting
Appendix B:
Temporary Swale Calculations
Appendix C:
Rip -Rap Calculations
Appendix D:
Pipe Calculations
Appendix E:
NRCS Soil Report
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PROJECT DESCRIPTION
This project site consists of 7.0 acres on Blue Heron Dr off of Old Pectolus Rd, SR 1534, . The site high point is where the
open air shelters are with a downward slope of 3 — 6 % all around the shelters. The elevation ranges from approximately
23.0 feet to 14.0 feet. Sheet runoff will be directed away from the existing structures.
The temporary stockpile will have 1.5 to 1 side slopes and be for topsoil. It will be redistributed and the remainder
permanently seeded. Upon the completion of the spread of topsoil it will be permanently seeded.
This site contains 57.9 acres of which 7.5 acres will be disturbed
II. SITE DESCRIPTION
The site has slopes averaging 4 - 6 %. Overall, elevations vary from a high point of 23.0 feet above sea level to a low
point of 14.0 feet above sea level. The soil types on the site are primarily Bibb complex (Bb), Alaga loamy sand (AgB),
Pactolus loamy sand (Pa).
III ADJACENT PROPERTY
The property is bounded on the north by residential property, on the west by existing lake, on the south by Dunhagan
Drive and on the east by residential property.
IV. SOILS
According to the soil survey from the USDA the soil types on the site are are primarily Bibb complex (Bb), Norfolk loamy
sand (NrB), Ocilla loamy fine sand (OcB) and Wagram loamy sand (WaB).
V. PLANNED STORM WATER MANAGEMENT AND EROSION AND SEDIMENTATION CONTROL
MEASURES
• TEMPORARY GRAVEL CONSTRUCTION ENTRANCE
A Temporary Gravel Construction Entrance is to be used at all street connections.
• TEMPORARY SILT FENCE
Temporary Silt Fences are to be placed at the toe of fill sites adjacent to the property line to collect sediment laden
runoff. The silt fence will provide an excellent barrier to protect off -site facilities from sediments.
• HARDWARE CLOTH & GRAVEL INLET PROTECTION
Hardware cloth & gravel inlet protection is placed around a catch basin or a drop inlet where the flow is light to
moderate.
• GRASS LINED CHANNEL
Grass lined channels with temporary matting will be constructed at locations shown on plans.
VI. CONSTRUCTION SCHEDULE
1. OBTAIN PLAN APPROVALS AND ALL APPLICABLE PERMITS.
2. FLAG LIMITS OF ROUGH GRADING FOR, PARKING LOTS AND ESTABLISH GRADE LIMITS AS NEEDED.
3. CONTACT CITY OF GREENVILLE AT 252-329-4467 AND THEN HOLD PRECONSTRUCTION MEETING WITH
GRADING CONTRACTOR, EROSION CONTROL ADMINISTRATOR PROJECT ENGINEER AND OWNER
BEFORE WORK BEGINS
Phase 1 . CLEARING AND GRUBBING PHASE
1. INSTALL TEMPORARY GRAVEL CONSTRUCTION ENTRANCE
2. INSTALL THE PERIMETER SEDIMENT FENCES AT THE FIRST CONSTRUCTION ACTIVITY
3. CLEAR AND GRUB ENOUGH TO INSTALL SILT FENCE AND TEMPORARY DIVERSION SWALES.
4. INSTALL TEMPORARY DIVERSION SWALES.
5. BEGIN CLEARING AND GRUBBING STRIP SITE OF TOPSOIL AND STOCKPILE IN THE DESIGNATED AREA

Phase 2. SITE GRADING
1. INSTALL CONCRETE WASHOUT AREA PRIOR TO CONSTRUCTION OF STORM DRAINAGE STRUCTURES.
2. INSTALL STORM DRAINAGE PIPING AND END OF DAY MEASURES
3. INSTALL HARDWARE CLOTH AND INLET PROTECTION AROUND ALL INLET CATCH BASINS.
4. BEGIN IMPORTING FILL FOR THE PARKING LOT AND SURROUNDING AREA.
5. FINAL GRADE THE PARKING LOT.
6. FINE GRADE.
7. CONSTRUCT PERMANENT STORM WATER CONVEYANCE SWALES AND STABILIZE
8. PROVIDE A GROUND COVER (TEMPORARY OR PERMANENT) ON EXPOSED SLOPES 14 CALENDAR DAYS
FOLLOWING COMPLETION OF ANY PHASE OF GRADING FOR SLOPES 3:1 OR FLATTER INCLUDING ALL
OTHER SLOPES 4:1 OR FLATTER. PROVIDE A GROUND COVER (TEMPORARY OR PERMANENT) ON
EXPOSED SLOPES WITHIN 7 CALENDAR DAYS FOLLOWING COMPLETION OF ANY PHASE OF GRADING
FOR SLOPES 3:1 OR STEEPER INCLUDING ALL PERMANENT DIKES, SWALES, DITCHES AND SLOPES AND
DISTRUBANCES WITHIN HIGH QUALITY WATER (HQWQ) ZONES.
9. ADDITIONAL EROSION AND SEDIMENTATION CONTROL MEASURES MAY BE REQUIRED BY THE STATE OR
OWNER IF DEEMED NECESSARY.
10. AFTER SITE IS STABILIZED, REMOVE ALL TEMPORARY MEASURES, FINE GRADE DISTURBED AREAS, AND
INSTALL PERMANENT VEGETATION ON THE DISTURBED AREAS.
11. MAINTAIN PERMANENT VEGETATION BY TOP DRESSING WITH 700 LBS PER ACRE OF FERTILIZER EVERY
6 MONTHS UNTIL THE COMPLETION OF THE PROJECT.
12. WITHIN 6" OF FINAL GRADE, RE -DISTRIBUTE 6" OF TOP SOIL
13. FINE GRADE, PERMANENTLY SEED AND MULCH ALL LANDSCAPED AREAS
14. REMOVE ALL REMAINING TEMPORARY EROSION AND SEDIMENTATION CONTROL MEASURES UPON
COMPLETION AND STABILIZATION OF PROJECT.
VII. MAINTENANCE PLAN
All erosion and sediment control practices will be checked for stability and operation following every run-off producing
rainfall but in no case less than once every week. Any needed repairs will be made immediately to maintain all
practices as designed.
Sediment will be removed from behind the silt fence when it becomes 0.5 feet deep.
Sediment will be removed from the sediment trap when the storage has been approximately 50% filled. Gravel will
be cleaned and replaced when the sediment pool no longer drains properly.
All seeded areas will be fertilized, re -seeded as necessary, and mulched according to specifications in the vegetative
plan to maintain a vigorous, dense vegetative cover.
VIII. VICINITY PLAN
See Erosion Control Plan
IX. VEGETATION PLAN
See Construction Drawings
X. GROUND STABILIZATION (PER NCG010000)
Soil stabilization shall be achieved on any area of a site where land -disturbing activities have temporarily or
permanently ceased according to the following schedule:
a. All perimeter dikes, swales, ditches, perimeter slopes and all slopes steeper than 3 horizontal to 1 vertical (3:1)
shall be provided temporary or permanent stabilization with ground cover as soon as practicable but in any
event within 7 calendar days from the last land -disturbing activity.
b. All other disturbed areas shall be provided temporary or permanent stabilization with ground cover as soon as
practicable but in any event within 14 calendar days from the last land -disturbing activity.
Conditions - In meeting the stabilization requirements above, the following conditions or exemptions shall apply:
a. Extensions of time may be approved by the permitting authority based on weather or other site -specific
conditions that make compliance impracticable.
b. All slopes 50' in length or greater shall apply the ground cover within 7 days except when the slope is flatter
than 4:1. Slopes less than 50' shall apply ground cover within 14 days except when slopes are steeper than 3:1,
the 7 day -requirement applies.
c. Any sloped area flatter than 4:1 shall be exempt from the 7-day ground cover requirement.
d. Slopes 10' or less in length shall be exempt from the 7-day ground cover requirement except when the slope is
steeper than 2:1.
e. Although stabilization is usually specified as ground cover, other methods, such as chemical stabilization, may
be allowed on a case -by -case basis.
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f. For portions of projects within one mile and draining to trout waters and High Quality Waters as classified by the
Environmental Management Commission, stabilization with ground cover shall be achieved as soon as
practicable but in any event on all areas of the site within 7 calendar days from the last land -disturbing act.
g. For portions of projects located in Outstanding Resource Waters watersheds as classified by the Environmental
Management Commission, stabilization with ground cover shall be achieved as soon as practicable but in any
event on all areas within 7 calendar days from the last land -disturbing act.
h. Portions of a site that are lower in elevation than adjacent discharge locations and are not expected to
discharge during construction may be exempt from the temporary ground cover requirements if identified on the
approved E&SC plan or added by the permitting authority.
XI. SELF INSPECTION AND REPORTING REQUIREMENTS (PER NCG010000)
Minimum self -inspection and reporting requirements are as follows unless otherwise approved in writing by the Division of Water
Quality.
1. A rain gauge shall be maintained in good working order on the site unless another rain monitoring device has been
approved by the permitting authority.
2. A written record of the daily rainfall amounts shall be retained and all records shall be made available to DWQ or
authorized agent upon request (Note: if no rainfall occurred, the permittee must record "zero").
3. Erosion and sedimentation control measures shall be inspected to ensure that they are operating correctly.
Inspection records must be maintained for each inspection event and for each measure. At a minimum, inspection of
measures must occur at the frequency indicated below:
a. All erosion and sedimentation control measures must be inspected by or under the direction of the permittee at
least once every seven calendar days, and
b. All erosion and sediment control measures must be inspected by or under the direction of the permittee within
24 hours after any storm event of greater than 0.50 inches of rain per 24 hour period.
C. Times when a determination that adverse weather conditions prevented inspections should be documented on
the Inspection Record.
4. Once land disturbance has begun on the site, stormwater runoff discharge outfalls shall be inspected by observation
for erosion, sedimentation and other stormwater discharge characteristics such as clarity, floating solids, and oil
sheens. Inspections of the outfalls shall be made at least once every seven calendar days and within 24 hours after
any storm event of greater than 0.50 inches of rain per 24 hour period.
5. Inspections are only required to be made during normal business hours. When adverse weather conditions would
cause the safety of the inspection personnel to be in jeopardy, the inspection can be delayed until it is deemed safe
to perform these duties. If the inspection cannot be done on that day, it must be completed on the following business
day.
6. Twenty-four Hour Reporting for visible sediment deposition
a. The permittee shall report to the Division of Water Quality central office or the appropriate regional office any
visible sediment being deposited in any stream or wetland or any noncompliance which may endanger health or
the environment. (See Section IX of this permit for contact information.) Any information shall be provided orally
or electronically within 24 hours from the time the permittee became aware of the circumstances. Visible
discoloration or suspended solids in the effluent should be recorded on the Inspection Record as provided
below.
b. A written submission shall be provided to the appropriate regional office of the DWQ within 5 days of the time
the permittee becomes aware of the circumstances. The written submission shall contain a description of the
sediment deposition and actions taken to address the cause of the deposition. The Division of Water Quality
staff may waive the requirement for a written report on a case -by -case basis.
Records of inspections made during the previous 30 days shall remain on the site and available for agency
inspectors at all times during normal working hours, unless the permitting authority provides a site -specific exemption
based on unique site conditions that make this requirement not practical. Older records must be maintained for a
period of one year after project completion and made available upon request. The records must provide the details of
each inspection including observations, and actions taken in accordance with this permit. The permittee shall record
the required rainfall and monitoring observations on the "Inspection Record for Activities Under Stormwater General
Permit NCG010000" form provided by the Division or a similar inspection form that is inclusive of all of the elements
contained in the Division's form. Electronic storage of records will be allowed if approved by the permitting authority.
Inspection records must include, at a minimum, the following:
a. Control Measure Inspections: Inspection records must include at a minimum:
1. identification of the measures inspected,
2. date and time of the inspection,
3. name of the person performing the inspection,
4. indication of whether the measures were operating properly,
5. description of maintenance needs for the measure,
6. corrective actions taken and
7. date of actions taken.
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b. Stormwater Discharge Inspections: Inspection records must include at a minimum:
1. identification of the discharge outfall inspected,
2. date and time of the inspection,
3. name of the person performing the inspection,
4. evidence of indicators of stormwater pollution such as oil sheen, floating or suspended solids or
discoloration,
5. indication of visible sediment leaving the site,
6. actions taken to correct/prevent sedimentation and
7. date of actions taken.
C. Visible Sedimentation Found Outside the Site Limits: Inspection records must include:
1. an explanation as to the actions taken to control future releases,
2. actions taken to clean up or stabilize the sediment that has left the site limits and
3. the date of actions taken.
d. Visible Sedimentation Found in Streams or Wetlands: All inspections should include evaluation of streams or
wetlands onsite or offsite (where accessible) to determine if visible sedimentation has occurred.
Visible Stream Turbidity - If the discharge from a site results in visible stream turbidity, inspection records must
record that evidence and actions taken to reduce sediment contributions. Sites discharging to streams named on the
state's 303(d) list as impaired for sediment -related causes may be required to perform additional monitoring,
inspections or application of more -stringent management practices if it is determined that the additional requirements
are needed to assure compliance with the federal or state impaired -waters conditions. If a discharge covered by this
permit enters a stream segment that is listed on the Impaired Stream List for sediment -related causes, and a Total
Maximum Daily Load (TMDL) has been prepared for those pollutants, the permittee must implement measures to
ensure that the discharge of pollutants from the site is consistent with the assumptions and meets the requirements
of the approved TMDL. The DWQ 303(d) list can be found at: http://h2o.enr.state.nc.us/tmdl/General 303d.htm/
10. Additional information can be found in Appendix A.
XII. EROSION AND SEDIMENTATION CONTROL DEVICES
All erosion and sedimentation control devices shall remain in place and be maintained by the Contractor until all
seeding is established and construction areas have been stabilized.
XIII. TEMPORARY SEEDING
Seed in accordance with Soil Conservation Service recommendations with regard to seed type, rate of application,
fertilizer, etc.
XIV. SPECIFICATIONS AND DETAILS
6.02 Land Grading
a. Construct and maintain all erosion and sedimentation control practices and measures in accordance with the
approved sedimentation control plan and construction schedule.
b. Remove good topsoil from areas to be graded and filled, and preserve it for use in finishing the grading of all
critical areas.
C. Scarify areas to be topsoiled to a minimum depth of 2 inches before placing topsoil (Practice 6.04, Topsoiling).
d. Clear and grub areas to be filled by removing trees, vegetation, roots, or other objectionable material that would
affect the planned stability of the fill.
e. Ensure that fill material is free of brush, rubbish, rocks, logs, stumps, building debris, and other materials
inappropriate for constructing stable fills.
f. Place all fill in layers not to exceed 9 inches in thickness, and compact the layers as required to reduce erosion,
slippage, settlement, or other related problems.
g. Do not incorporate frozen, soft, mucky, or highly compressible materials into fill slopes.
h. Do not place fill on a frozen foundation, due to possible subsidence and slippage.
i. Keep diversions and other water conveyance measures free of sediment during all phases of development.
j. Handle seeps or springs encountered during construction in accordance with approved methods (Practice 6.81,
Subsurface Drain).
k. Permanently stabilize all graded areas immediately after final grading is completed on each area in the grading
plan. Apply temporary stabilization measures on all graded areas when work is to be interrupted or delayed for
30 working days or longer.
I. Show topsoil stockpiles, borrow areas, and spoil areas on the plans, and make sure they are adequately
protected from erosion. Include final stabilization of these areas in the plan.
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2 6.06 Temporary Gravel Construction Entrance
a. Clear the entrance and exit area of all vegetation, roots, and other objectionable material and properly grade it.
b. Place the gravel to the specific grade and dimensions shown on the plans, and smooth it.
C. Provide drainage to carry water to a sediment trap or other suitable outlet.
d. Use geotextile fabrics because they improve stability of the foundation in locations subject to seepage or high
water table.
3 6.14 Mulching
a. Select a material based on site and practice requirements, availability of material, labor, and equipment. Table
6.14a lists commonly used mulches and some alternatives.
b. Before mulching, complete the required grading, install sediment control practices, and prepare the seedbed.
Apply seed before mulching except in the following cases:
i. Seed is applied as part of a hydroseeder slurry containing wood fiber mulch.
ii. A hydroseeder slurry is applied over straw.
c. APPLICATION OF ORGANIC MULCH
Organic mulches are effective where they can be tacked securely to the surface.
Material and specifications are given in Table 6.14a.
Spread mulch uniformly by hand, or with a mulch blower. When spreading straw mulch by hand, divide the area
to be mulched into sections of approximately 1,000 ft2, and place 70-90 lb of straw ( 1 1/2 to 2 bales) in each
section to facilitate uniform distribution. After spreading mulch, no more than 25% of the ground surface should
be visible. In hydroseeding operations a green dye, added to the slurry, assures a uniform application.
d. ANCHORING ORGANIC MULCH
Straw mulch must be anchored immediately after spreading. The following methods of anchoring mulch may be
used:
Mulch anchoring tool —A tractor -drawn implement designed to punch mulch into the soil, a mulch anchoring tool
provides maximum erosion control with straw. A regular farm disk, weighted and set nearly straight, may
substitute, but will not do a job comparable to the mulch anchoring tool. The disk should not be sharp enough to
cut the straw. These methods are limited to slopes no steeper than 3:1, where equipment can operate safely.
Operate machinery on the contour.
Liquid mulch binders —Application of liquid mulch binders and tackifiers should be heaviest at the edges of
areas and at crests of ridges and banks, to resist wind. Binder should be applied uniformly to the rest of the
area. Binders may be applied after mulch is spread, or may be sprayed into the mulch as it is being blown onto
the soil. Applying straw and binder together is the most effective method. Liquid binders include asphalt and an
array of commercially available synthetic binders.
Emulsified asphalt is the most commonly used mulch binder. Any type thin enough to be blown from spray
equipment is satisfactory. Asphalt is classified according to the time it takes to cure. Rapid setting (RS or CRS
designation) is formulated for curing in less than 24 hours, even during periods of high humidity; it is best used
in spring and fall. Medium setting (MS or CMS) is formulated for curing within 24 to 48 hours, and slow setting
(SS or CSS) is formulated for use during hot, dry weather, requiring 48 hours or more curing time.
Apply asphalt at 0.10 gallons per square yard (10 gal/1,000 ft2). Heavier applications cause straw to "perch"
over rills.
In traffic areas, uncured asphalt can be picked up on shoes and cause damage to rugs, clothing etc. Use types
IRS or CRS to minimize such problems.
Synthetic binders such as Petroset, Terratack, and Aerospray may be used, as recommended by the
manufacturer, to anchor mulch. These are expensive, and therefore usually used in small areas or in residential
areas where asphalt may be a problem (Use of trade names does not constitute an endorsement).
Mulch nettings—Lightweight plastic, cotton, jute, wire, or paper nets may be stapled over the mulch according
to the manufacturer's recommendations (see "Nets and Mats" below).
Peg and twine —because it is labor-intensive, this method is feasible only in small areas where other methods
cannot be used. Drive 8-10 inch wooden pegs to within 3 inches of the soil surface, every 4 feet in all directions.
Stakes may be driven before or after straw is spread. Secure mulch by stretching twine between pegs in a
crisscross -within -a -square pattern. Turn twine two or more times around each peg. Twine may be tightened
over the mulch by driving pegs further into the ground.
Vegetation —Rye (grain) may be used to anchor mulch in fall plantings and German millet in spring. Broadcast
at 15 lb/acre before applying mulch.
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e. CHEMICAL MULCHES
Chemical mulches may be effective for soil stabilization if used between May 1 and June 15, or Sept. 15 and
Oct. 15, provided that they are used on slopes no steeper than 4:1, and that proper seedbed preparation has
been accomplished, including surface roughening where required.
Chemical mulches may be used to bind other mulches, or with wood fiber in a hydro seeded slurry at any time.
Follow the manufacturer's recommendations for application.
f. FIBERGLASS ROVING
Fiberglass roving ("roving") is wound into a cylindrical package so that it can be continuously withdrawn from
the center using a compressed air ejector. Roving expands into a mat of glass fibers as it contacts the soil
surface. It is often used over a straw mulch, but must still be tacked with asphalt.
Spread roving uniformly over the area at a rate of 0.25 to 0.35 Ib/yd2. Anchor with asphalt immediately after
application, at a rate of 0.25 to 0.35 gal/yd2.
As a channel lining, and at other sites of concentrated flow, the roving mat must be further anchored to prevent
undermining. It may be secured with stakes placed at intervals no greater than 10 feet along the drainage way,
and randomly throughout its width, but not more than 10 feet apart. As an option to staking, the roving can be
buried to a depth of 5 inches at the upgrade end and at intervals of 50 feet along the length of the channel.
g. NETS AND MATS
Nets alone generally provide little moisture conservation benefits and only limited erosion protection. Therefore,
they are usually used in conjunction with an organic mulch such as straw.
Except when wood fiber slurry is used, netting should always be installed over the mulch. Wood fiber may be
sprayed on top of an installed net.
Mats, including "excelsior" (wood fiber) blankets, are considered protective mulches and may be used alone, on
erodible soils, and during all times of the year. Place the matting in firm contact with the soil, and staple
securely.
h. INSTALLATION OF NETTING AND MATTING
Products designed to control erosion should be installed in accordance with manufacturer's instructions. Any
mat or blanket -type product used as protective mulch should provide cover of at least 30% of the surface where
it is applied. Installation is illustrated in Figure 6.14a.
1. Apply lime, fertilizer, and seed before laying the net or mat.
2. Start laying the net from the top of the channel or slope, and unroll it down the grade. Allow netting to lay
loosely on the soil or mulch cover but without wrinkles —do not stretch.
3. To secure the net, bury the upslope end in a slot or trench no less than 6 inches deep, cover with soil, and
tamp firmly as shown in Figure 6.14a. Staple the net every 12 inches across the top end and every 3 ft
around the edges and bottom. Where 2 strips of net are laid side by side, the adjacent edges should be
overlapped 3 inches and stapled together. Each strip of netting should also be stapled down the center,
every 3 ft. Do not stretch the net when applying staples.
4. To join two strips, cut a trench to anchor the end of the new net. Overlap the end of the previous roll 18
inches, as shown in Figure 6.14a, and staple every 12 inches just below the anchor slot.
4 6.61 Hardware Cloth & Gravel Inlet Protection (Temporary)
a. Uniformly grade a shallow depression approaching the inlet.
b. Drive 5-foot steel posts 2 feet into the ground surrounding the inlet. Space posts evenly around the perimeter of
the inlet, a maximum of 4 feet apart.
C. Surround the posts with wire mesh hardware cloth. Secure the wire mesh to the steel posts at the top, middle,
and bottom. Placing a 2-foot flap of the wire mesh under the gravel for anchoring is recommended.
d. Place clean gravel (NC DOT #5 or #57 stone) on a 2:1 slope with a height of 16 inches around the wire, and
smooth to an even grade.
e. Once the contributing drainage area has been stabilized, remove accumulated sediment, and establish final
grading elevations.
f. Compact the area properly and stabilized it with groundcover.
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6 6.60 Temporary Sediment Trap
a. Clear, grub, and strip the area under the embankment of all vegetation and root mat. Remove all surface soil
containing high amounts of organic matter, and stockpile or dispose of it properly. Haul all objectionable
material to the designated disposal area.
b. Ensure that fill material for the embankment is free of roots, woody vegetation, organic matter, and other
objectionable material. Place the fill in lifts not to exceed 9 inches, and machine compact it. Over fill the
embankment 6 inches to allow for settlement.
C. Construct the outlet section in the embankment. Protect the connection between the riprap and the soil from
piping by using filter fabric or a keyway cutoff trench between the riprap structure and soil.
1. Place the filter fabric between the riprap and the soil. Extend the fabric across the spillway foundation and
sides to the top of the dam; or
2. Excavate a keyway trench along the center line of the spillway foundation extending up the sides to the
height of the dam. The trench should be at least 2 feet deep and 2 feet wide with 1:1 side slopes.
d. Clear the pond area below the elevation of the crest of the spillway to facilitate sediment cleanout.
e. All cut and fill slopes should be 2:1 or flatter.
f. Ensure that the stone (drainage) section of the embankment has a minimum bottom width of 3 feet and
maximum side slopes of 1:1 that extend to the bottom of the spillway section.
g. Construct the minimum finished stone spillway bottom width, as shown on the plans, with 2:1 side slopes
extending to the top of the over filled embankment. Keep the thickness of the sides of the spillway outlet
structure at a minimum of 21 inches. The weir must be level and constructed to grade to assure design
capacity.
h. Material used in the stone section should be a well -graded mixture of stone with a d50 size of 9 inches (class B
erosion control stone is recommended) and a maximum stone size of 14 inches. The stone may be machine
placed and the smaller stones worked into the voids of the larger stones. The stone should be hard, angular,
and highly weather -resistant.
i. Discharge inlet water into the basin in a manner to prevent erosion. Use temporary slope drains or diversions
with outlet protection to divert sediment -laden water to the upper end of the pool area to improve basin trap
efficiency (References: Runoff Control Measures and Outlet Protection).
j. Ensure that the stone spillway outlet section extends downstream past the toe of the embankment until stable
conditions are reached and outlet velocity is acceptable for the receiving stream. Keep the edges of the stone
outlet section flush with the surrounding ground, and shape the center to confine the outflow stream
(References: Outlet Protection).
k. Direct emergency bypass to natural, stable areas. Locate bypass outlets so that flow will not damage the
embankment.
I. Stabilize the embankment and all disturbed areas above the sediment pool and downstream from the trap
immediately after construction (References: Surface Stabilization).
m. Show the distance from the top of the spillway to the sediment cleanout level (1/2 the design depth) on the
plans and mark it in the field.
n. Install porous baffles as specified in Practice 6.65, Porous Baffles.
6 6.62 Temporary Sediment Fence
a. MATERIALS
1. Use a synthetic filter fabric of at least 95% by weight of polyolefins or polyester, which is certified by the
manufacturer or supplier as conforming to the requirements in ASTM D 6461, which is shown in part in
Table 6.62b.
Synthetic filter fabric should contain ultraviolet ray inhibitors and stabilizers to provide a minimum of 6
months of expected usable construction life at a temperature range of 0 to 1200 F.
2. Ensure that posts for sediment fences are 1.33 lb/linear ft steel with a minimum length of 5 feet. Make sure
that steel posts have projections to facilitate fastening the fabric.
3. For reinforcement of standard strength filter fabric, use wire fence with a minimum 14 gauge and a
maximum mesh spacing of 6 inches.

Appendix A:
NCG01 Ground Stabilization and Materials Handling
NCG01: Self -Inspection, Recordkeeping, and Reporting

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Appendix B: Temporary Swale Calculations

;� Rivers
& ASSOCIATES. INC.
SWALE CALCULATIONS for Temporary Swale 1
Adventure Park
Greenville, NC
Swale 1 in temporary condition
Outlet Based on 10 year storm
Total watershed area (Ac) 1.57
Land Type
Rational C
CN
Acres
Area Impervious
0.9
98
0.320
denuded with temporary seeding
0.25
73
MR
Total watershed area
1.000
Composite
0.46
Overland Channelized
Hydraulic Length (ft) -- 485
Vertical Relief (ft) -- 0.50
Time of Concentration
Overland Channelized Total
j"'
xTime (min) -- -- 5.46
12s Travel Factor 2 0.2
Rainfall Intensity =
I = g/(h+T)
8.0
inches per hr
cfs
Peak Discharge =
Q=CIA
5.8
Right Side Slope
Left Side Slope
n=
Slope
hannel Veloctiy Flow Depth
3.00
3.00
0.028
0.10%1
3.91 fps 0.28 ft
Tractive Force use temporary liner
ITd= YDS (lb/sf) 1 0.018 Jute Net Td= 0.45 Ib/sf
107 E. Second Street, Greenville, NC 27858 * PO Box 929, Greenville, NC 27835 ■ Phone: [phone] ■ Fax; 252-752-3974
NCBELS Lic. No. F-0334 www.rive rsandassociates,com NCBOLA Uc. No. C-312

0
1,44 ItiverS
& ASSCCLATES, INc.
SWALE CALCULATIONS for Temporary Swale 2
Adventure Park
Greenville, NC
Swale 2 in temporary condition
Outlet Based on 10 year storm
Total watershed area (Ac) 1.61
Land Type
Rational C
CN
Acres
Area Impervious
0.9
98
1.050
denuded with temporary seeding
0.25
73
0.560
Total watershed area
1.610
Composite
0.67
Overland Channelized
Hydraulic Length (ft) -- 63
Vertical Relief (ft) -- 0.30
Time of Concentration
Overland Channelized Total
j"'
xTime (min) -- -- 5.50
H
Travel Factor 2 0.2
Rainfall Intensity = I = g/(h+T) 8.0 in/hr
Peak Discharge = Q=CIA 8.7 cfs
Right Side Slope
Left Side Slope
n=
Slope
Channel Veloctiy
Flow Depth
3.00
3.00
0.028
0.48%1
3.55 fps
1 0.32 ft
Tractive Force use temporary liner
Td= YDS (Ib/sf) 1 0.096 Jute Net Td= 0.45 Ib/sf
107 E. Second Street, Greenville, NC 27858 • PO Box 929, Greenville, NC 27835 • Phone: [phone] • Fax: [phone]
NCBELS Lic. No. F-0334 www rlversandassociates.com NCBOLA Lic. No. C-312

Appendix C: Rip Rap Calculations

Appendix D: Pipe Calculations

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Appendix E: NRCS Soil Report

USDA United States
Department of
Agriculture
N RCS
Natural
Resources
Conservation
Service
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
Pitt County,
North Carolina
August 12, 2020

Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nres.usda.gov/wps/
portal/nres/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https:Hoffices.sc.egov.usda.gov/locator/app?agency=nres) or your NRCS State Soil
Scientist (http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/?
cid=nres142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (NRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require

alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at [phone] (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call [phone] (voice) or [phone] (TDD). USDA is an equal opportunity
provider and employer.

Contents
Preface....................................................................................................................
2
How Soil Surveys Are Made..................................................................................5
SoilMap..................................................................................................................
8
SoilMap................................................................................................................9
Legend................................................................................................................10
MapUnit Legend................................................................................................
11
MapUnit Descriptions.........................................................................................11
Pitt County, North Carolina.............................................................................
13
AgB—Alaga loamy sand, banded substratum, 0 to 6 percent slopes
(Alpin)....................................................................................................13
AIB—Altavista sandy loam, 0 to 4 percent slopes.......................................14
Bb—Bibb complex.......................................................................................15
Pa—Pactolus loamy sand...........................................................................
16
Po —Portsmouth loam.................................................................................
17
W—Water....................................................................................................19
References............................................................................................................
20

How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous
areas in a specific area. They include a description of the soils and miscellaneous
areas and their location on the landscape and tables that show soil properties and
limitations affecting various uses. Soil scientists observed the steepness, length,
and shape of the slopes; the general pattern of drainage; the kinds of crops and
native plants; and the kinds of bedrock. They observed and described many soil
profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The
profile extends from the surface down into the unconsolidated material in which the
soil formed or from the surface down to bedrock. The unconsolidated material is
devoid of roots and other living organisms and has not been changed by other
biological activity.
Currently, soils are mapped according to the boundaries of major land resource
areas (MLRAs). MLRAs are geographically associated land resource units that
share common characteristics related to physiography, geology, climate, water
resources, soils, biological resources, and land uses (USDA, 2006). Soil survey
areas typically consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that
is related to the geology, landforms, relief, climate, and natural vegetation of the
area. Each kind of soil and miscellaneous area is associated with a particular kind
of landform or with a segment of the landform. By observing the soils and
miscellaneous areas in the survey area and relating their position to specific
segments of the landform, a soil scientist develops a concept, or model, of how they
were formed. Thus, during mapping, this model enables the soil scientist to predict
with a considerable degree of accuracy the kind of soil or miscellaneous area at a
specific location on the landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented
by an understanding of the soil -vegetation -landscape relationship, are sufficient to
verify predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them
to identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character
of soil properties and the arrangement of horizons within the profile. After the soil

Custom Soil Resource Report
scientists classified and named the soils in the survey area, they compared the
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that
have similar use and management requirements. Each map unit is defined by a
unique combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components
of the map unit. The presence of minor components in a map unit in no way
diminishes the usefulness or accuracy of the data. The delineation of such
landforms and landform segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, onsite
investigation is needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape,
and experience of the soil scientist. Observations are made to test and refine the
soil -landscape model and predictions and to verify the classification of the soils at
specific locations. Once the soil -landscape model is refined, a significantly smaller
number of measurements of individual soil properties are made and recorded.
These measurements may include field measurements, such as those for color,
depth to bedrock, and texture, and laboratory measurements, such as those for
content of sand, silt, clay, salt, and other components. Properties of each soil
typically vary from one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists
interpret the data from these analyses and tests as well as the field -observed
characteristics and the soil properties to determine the expected behavior of the
soils under different uses. Interpretations for all of the soils are field tested through
observation of the soils in different uses and under different levels of management.
Some interpretations are modified to fit local conditions, and some new
interpretations are developed to meet local needs. Data are assembled from other
sources, such as research information, production records, and field experience of
specialists. For example, data on crop yields under defined levels of management
are assembled from farm records and from field or plot experiments on the same
kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on
such variables as climate and biological activity. Soil conditions are predictable over
long periods of time, but they are not predictable from year to year. For example,
soil scientists can predict with a fairly high degree of accuracy that a given soil will
have a high water table within certain depths in most years, but they cannot predict
that a high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and

Custom Soil Resource Report
identified each as a specific map unit. Aerial photographs show trees, buildings,
fields, roads, and rivers, all of which help in locating boundaries accurately.

Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.

in
289290
35° 36' 52" N
35° 36'38"N
289290 289340 289390 289440 289490
in
Map Scale: 1:2,150 if printed on A portrait (8.5" x 11") sheet.
Meters N
0 30 60 120 180
Feet
0 100 200 400 600
Map projection: Web Mercator Comer coordinates: WGS84 Edge tics: UTM Zone 18N WGS84
9
Custom Soil Resource Report
Soil Map
289340 28s0% 289440 289490
289540
289540
28959D
35° 36' 52" N
I
N
35° 36' 38" N
289590

MAP LEGEND
Area of Interest (AOI)
0
Area of Interest (AOI)
Soils
0
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special
Point Features
Iwo
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
A.
Lava Flow
.&
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
oa
Sodic Spot
Custom Soil Resource Report
MAP INFORMATION
Spoil Area
The soil surveys that comprise your AOI were mapped at
1:15,800.
Stony Spot
Very Stony Spot
Warning: Soil Map may not be valid at this scale.
Wet Spot
Enlargement of maps beyond the scale of mapping can cause
Other
misunderstanding of the detail of mapping and accuracy of soil
�-
Special Line Features
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
Water Features
scale.
Streams and Canals
Transportation
Please rely on the bar scale on each map sheet for map
--+-*
Rails
measurements.
. 0
Interstate Highways
Source of Map: Natural Resources Conservation Service
US Routes
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Major Roads
Local Roads
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
Background
distance and area. A projection that preserves area, such as the
Aerial Photography
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Pitt County, North Carolina
Survey Area Data: Version 17, Jun 3, 2020
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Apr 20, 2015—May
15, 2017
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
10

Custom Soil Resource Report
Map Unit Legend
Map Unit Symbol
Map Unit Name
Acres in AOI
Percent of AOI
AgB
Alaga loamy sand, banded
substratum, 0 to 6 percent
slopes (Alpin)
2.7
24.2%
AIB
Altavista sandy loam, 0 to 4
percent slopes
0.2
2.2%
Bb
Bibb complex
3.4
31.2%
Pa
Pactolus loamy sand
3.6
32.7%
Po
Portsmouth loam
0.1
1.0%
W
Water
1.0
8.7%
Totals for Area of Interest
11.0
100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. If included in the database for a
given area, the contrasting minor components are identified in the map unit
descriptions along with some characteristics of each. A few areas of minor
components may not have been observed, and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape.
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Custom Soil Resource Report
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha -Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha -Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
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Custom Soil Resource Report
Pitt County, North Carolina
AgB—Alaga loamy sand, banded substratum, 0 to 6 percent slopes
(Alpin)
Map Unit Setting
National map unit symbol: 3tyc
Elevation: 20 to 160 feet
Mean annual precipitation: 40 to 55 inches
Mean annual air temperature: 59 to 70 degrees F
Frost -free period: 200 to 280 days
Farmland classification: Not prime farmland
Map Unit Composition
Alpin and similar soils: 85 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Alpin
Setting
Landform: Ridges on marine terraces
Landform position (two-dimensional): Shoulder, summit
Landform position (three-dimensional): Crest
Down -slope shape: Convex
Across -slope shape: Convex
Parent material: Eolian sands and/or sandy fluviomarine deposits
Typical profile
A - 0 to 7 inches: fine sand
E - 7 to 38 inches: fine sand
E/Bt - 38 to 72 inches: fine sand
C - 72 to 80 inches: sand
Properties and qualities
Slope: 0 to 6 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Excessively drained
Runoff class: Very low
Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95
in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: Rare
Frequency of ponding: None
Maximum salinity. Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
Available water capacity: Low (about 4.2 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4s
Hydrologic Soil Group: A
Hydric soil rating: No
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Custom Soil Resource Report
AIB—Altavista sandy loam, 0 to 4 percent slopes
Map Unit Setting
National map unit symbol: 3tyd
Elevation: 20 to 160 feet
Mean annual precipitation: 40 to 55 inches
Mean annual air temperature: 59 to 70 degrees F
Frost -free period: 200 to 280 days
Farmland classification: All areas are prime farmland
Map Unit Composition
Altavista and similar soils: 90 percent
Minor components: 4 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Altavista
Setting
Landform: Stream terraces
Down -slope shape: Concave
Across -slope shape: Linear
Parent material: Old loamy alluvium derived from igneous and metamorphic rock
Typical profile
Ap - 0 to 9 inches: fine sandy loam
E - 9 to 14 inches: fine sandy loam
Bt - 14 to 40 inches: sandy clay loam
C - 40 to 80 inches: loamy sand
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Moderately well drained
Runoff class: Very high
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.57 to 1.98 in/hr)
Depth to water table: About 18 to 30 inches
Frequency of flooding: Rare
Frequency of ponding: None
Available water capacity: High (about 9.6 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 2w
Hydrologic Soil Group: C
Hydric soil rating: No
Minor Components
Tomotley, undrained
Percent of map unit. 2 percent
Landform: Depressions on stream terraces, flats on stream terraces
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Custom Soil Resource Report
Down -slope shape: Linear
Across -slope shape: Linear
Hydric soil rating: Yes
Roanoke, undrained
Percent of map unit. 2 percent
Landform: Depressions on stream terraces, backswamps on stream terraces
Landform position (three-dimensional): Flat
Down -slope shape: Concave
Across -slope shape: Linear
Hydric soil rating: Yes
Bb—Bibb complex
Map Unit Setting
National map unit symbol: 3tyj
Elevation: 20 to 160 feet
Mean annual precipitation: 40 to 55 inches
Mean annual air temperature: 59 to 70 degrees F
Frost -free period: 200 to 280 days
Farmland classification: Not prime farmland
Map Unit Composition
Bibb, undrained, and similar soils: 65 percent
Johnston, undrained, and similar soils: 20 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Bibb, Undrained
Setting
Landform: Flood plains
Landform position (two-dimensional): Toeslope
Down -slope shape: Concave
Across -slope shape: Linear
Parent material: Sandy and loamy alluvium
Typical profile
A - 0 to 6 inches: loamy sand
Cg1 - 6 to 60 inches: sandy loam
Cg2 - 60 to 80 inches: loamy sand
Properties and qualities
Slope: 0 to 1 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Poorly drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95
in/hr)
Depth to water table: About 0 to 12 inches
Frequency of flooding: FrequentNone
Frequency of ponding: None
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Custom Soil Resource Report
Available water capacity: Moderate (about 7.2 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 5w
Hydrologic Soil Group: A/D
Hydric soil rating: Yes
Description of Johnston, Undrained
Setting
Landform: Flood plains
Down -slope shape: Concave
Across -slope shape: Linear
Parent material: Sandy and loamy alluvium
Typical profile
A - 0 to 30 inches: mucky loam
Cgl - 30 to 34 inches: loamy fine sand
Cg2 - 34 to 80 inches: fine sandy loam
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Very poorly drained
Runoff class: Negligible
Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95
in/hr)
Depth to water table: About 0 inches
Frequency of flooding: FrequentNone
Frequency of ponding: Frequent
Available water capacity: High (about 9.4 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 7w
Hydrologic Soil Group: A/D
Hydric soil rating: Yes
Pa—Pactolus loamy sand
Map Unit Setting
National map unit symbol: 3tzd
Elevation: 80 to 330 feet
Mean annual precipitation: 38 to 55 inches
Mean annual air temperature: 59 to 70 degrees F
Frost -free period: 210 to 265 days
Farmland classification: Not prime farmland
Map Unit Composition
Pactolus and similar soils: 90 percent
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Custom Soil Resource Report
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Pactolus
Setting
Landform: Ridges on stream terraces, ridges on marine terraces
Landform position (three-dimensional): Tread
Down -slope shape: Concave, convex
Across -slope shape: Linear, convex
Parent material: Sandy fluviomarine deposits and/or eolian sands
Typical profile
Ap - 0 to 8 inches: loamy sand
C - 8 to 40 inches: loamy sand
Cg - 40 to 80 inches: loamy sand
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Moderately well drained
Runoff class: Very low
Capacity of the most limiting layer to transmit water (Ksat): High to very high (5.95
to 19.98 in/hr)
Depth to water table: About 18 to 36 inches
Frequency of flooding: Rare
Frequency of ponding: None
Available water capacity: Low (about 4.2 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3s
Hydrologic Soil Group: A
Hydric soil rating: No
Po —Portsmouth loam
Map Unit Setting
National map unit symbol: 3tzg
Elevation: 20 to 160 feet
Mean annual precipitation: 40 to 55 inches
Mean annual air temperature: 59 to 70 degrees F
Frost -free period: 200 to 280 days
Farmland classification: Prime farmland if drained
Map Unit Composition
Portsmouth, drained, and similar soils: 80 percent
Portsmouth, undrained, and similar soils: 10 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Portsmouth, Drained
Setting
Landform: Depressions on stream terraces, flats on marine terraces
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Custom Soil Resource Report
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Loamy fluviomarine deposits over sandy fluviomarine deposits
Typical profile
Ap - 0 to 12 inches: loam
Eg - 12 to 19 inches: loam
BEg - 19 to 23 inches: loam
Btg - 23 to 35 inches: sandy clay loam
BCg - 35 to 38 inches: sandy loam
2Cg1 - 38 to 48 inches: sand
2Cg2 - 48 to 80 inches: sand
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: 20 to 40 inches to strongly contrasting textural
stratification
Drainage class: Very poorly drained
Runoff class: Very high
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.57 to 1.98 in/hr)
Depth to water table: About 0 to 12 inches
Frequency of flooding: Rare
Frequency of ponding: None
Available water capacity: Low (about 5.8 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3w
Hydrologic Soil Group: B/D
Hydric soil rating: Yes
Description of Portsmouth, Undrained
Setting
Landform: Flats on marine terraces, depressions on stream terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Loamy fluviomarine deposits over sandy fluviomarine deposits
Typical profile
A - 0 to 12 inches: loam
Eg - 12 to 19 inches: loam
BEg - 19 to 23 inches: loam
Btg - 23 to 35 inches: sandy clay loam
BCg - 35 to 38 inches: sandy loam
2Cg1 - 38 to 48 inches: sand
2Cg2 - 48 to 80 inches: sand
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: 20 to 40 inches to strongly contrasting textural
stratification
Drainage class: Very poorly drained
Runoff class: Very high
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.57 to 1.98 in/hr)
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Custom Soil Resource Report
Depth to water table: About 0 to 12 inches
Frequency of flooding: Rare
Frequency of ponding: Rare
Available water capacity: Low (about 5.8 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 6w
Hydrologic Soil Group: B/D
Hydric soil rating: Yes
W—Water
Map Unit Composition
Water: 100 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Water
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 8w
Hydric soil rating: No
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References
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep -water habitats of the United States. U.S. Fish and Wildlife
Service FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric
soils in the United States.
National Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.
U.S. Department of Agriculture Handbook 18. http://www.nres.usda.gov/wps/portal/
n res/d eta i I/n ati o n a I/s o i Is/?cid = n res 142 p2_0 54262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for
making and interpreting soil surveys. 2nd edition. Natural Resources Conservation
Service, U.S. Department of Agriculture Handbook 436. http://
www. nres. usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://
www. nres. usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
United States Department of Agriculture, Natural Resources Conservation Service.
National forestry manual. http://www.nres.usda.gov/wps/portal/nres/detail/soils/
home/?cid=nres142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://www.nres.usda.gov/wps/portal/nres/
detail/national/landuse/rangepastu re/?cid=stelprdb1043084
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Custom Soil Resource Report
United States Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430-VI. http://www.nres.usda.gov/wps/portal/
n res/d eta i I/so i Is/scie ntists/?cid=n res 142 p2_054242
United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,
the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook
296. http://www.nres.usda.gov/wps/portal/nres/detail/national/soils/?
cid = n res 142 p2_05 3624
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http:H
www.nrcs.usda.gov/lnternet/FSE—DOCUMENTS/nrcsl 42p2_052290. pdf
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