20190572 Ver 1_Pre-app Meeting Info Packet_20190429


CrossCreekBankStabilizationProject

Theprojectproposestoutilizegenerallyacceptednaturalchanneldesign
methodologiestorepairandstabilizeapproximately450LFoffailing
streambankanddegradedstreamchannelalongCrossCreekwhichwas
heavilydamagedduringHurricaneMatthewintheFallof2016.

Theproposedrepairsareprimarilyfocusedalongtheleftchannelbank
wherelargeportionsofstreambankandadjacentupperslopes
(approximately40feetinheightandapproximately200feetinlength)have
failed.Highbankfailureshaveunderminedandcollapsedapproximately
100LFofanexistingasphaltgreenwaytrail,underminedanexistingchainͲ
linkfence,causeddamagetothefoundationoftheParks&Recreation
AdministrativeBuilding(locatedat280LamonStreet)andthreatened
numerousgravesiteswithinCrossCreekCemeterylocatedatthetopofthe
slope.Initscurrentconditionthesloperemainsunstable,activelyeroding
andunsafe.

Theproposedrepairswillincludethereconstructionoftheleftchannel
bankbacktoitsapproximatepreͲfailurecondition(basedonavailabledata
andfieldindicators)throughtheconstructionofbouldertoestabilization
andaoffsetstackedͲboulderrevetment/wallwithageogridslopetieͲback.
Portionsofthestreamchannelwillberegradedsuchthatthechannelwill
returnedtoitsapproximatepreͲstormlocationanddimension(shiftingthe
channeltotheright).

Significantaggradationofnaturalbedmaterialandrubble/debrishas
occurredalongportionsoftherightchannelbank.Channelgradingwill
relocatesomeportionofthismaterialwithinthechannelhoweverbased
onthevolumeofthisdebrisnoattemptwillbemadetoremoveitfromthe
channelbed.Ifpossiblelargerconcreteandotherinertdebriswillbe
brokenintosmallerpieces.Asappropriatesomerubble/debrismaybe
usedasbackfillforinͲchannelstructures(describedbelow).Where
practicallargemetaldebriswillberemovedandproperlydisposedof
offsite.

Ourintentwouldbetoconstructtheboulderrevetment/wallsuchthatthe
topofthewallwouldbeatanelevation5to7feethigherthanthe
elevationoftheadjacentrightfloodplainarea.Boulderfooter/toe
protectionwillextendapproximately4feetbelowthechannelbedto
reducethepotentialforscour.Slopesabovethetopoftheboulder
revetment/wallwillberegradedlandwarduntiltheyinterfaceaproposed
steelsheetpilewall(withtieͲbacks)nearthetopoftheslope.Theslopes
betweenthesheetpileandtheboulderrevetment/wallwillbestabilized
witheitheraripraperosioncontrolblanket,vegetationoracombinationof
thetwo.Afullgeotechnicalslopestabilityanalyseswillberequiredto
confirmtheappropriatenessoftheproposedrepairs.InͲchannelboulder
structures(crossͲvanes,JͲhooks,etc.)areproposedandareintendedto
redirectstreamflows(andenergy)towardthechannelcentertoprovide
furtherprotectionofthebankinadditiontoprovidinggradecontroland
promotingnaturalsedimenttransport.

Followingtherepairandstabilizationactivitiesremainingexposedsoil
surfaceswillbestabilizedwithcoirmattingandplantedwithnativespecies
(herbaceous,shrubandtree).Basedonthesizeofthestreamchanneland
theimpracticalityofpumparoundoperationstheproposedstreamand
bankrepairswillbeperformedinthewet.Whereappropriatestandard
sedimentanderosioncontrolmeasureswillbeinstalled.Accessforstream
andbankrepairconstructionwillbealonganexistingcorridoralongthe
rightchannelbankwhichwillallowmaterialsandequipmenttoaccessthe
repairarea.Weunderstandthatthiscorridorwasusedtoremovestorm
debrisfollowingHurricaneMatthew.

Environmental Consultants,
8412 Falls
of Nense Road, state
104, Rateigh, NC 27615 • Phone:
[phone] • Far:
[phone]
sandec.com
PROPERTY OWNER CERTIFICATION /AGENT AUTHORIZATION
Project Name/Description: CROSS CREEK BANK STABLIZATION S&EC Project #13185
Date: 2018
The Department of the Army
U.S. Army Corps of Engineers, Wilmington District
69 Darlington Avenue
Wilmington, NC 28403
Attn: Emily Greer Field Office: USACE Wilmin on Re ug latory Field Office
I, the undersigned, a duly authorized owner of record of the property/properties identified herein, do
authorize representatives of the Wilmington District, U.S. Army Corps of Engineers (Corps) and Soil &
Environmental Consultants, PA (S&EC) staff (as my agent) to enter upon the property herein described
for the purpose of conducting on-site investigations and issuing a determination associated with Waters
of the U.S, subject to Federal jurisdiction under Section 404 of the Clean Water Act and/or Section 10 of
the Rivers and Harbors Act of 1899. This document also authorizes S&EC (as my agent) to act on my
behalf and take all actions necessary for the processing, issuance and acceptance of a permit or
certification and any and all associated standard and special conditions. This notification supersedes any
previous correspondence concerning the agent for this project.
NOTICE: This authorization, for liability and professional courtesy reasons, is valid only for government
officials to enter the property when accompanied by S&EC staff. You should call S&EC to arrange a site
meeting prior to visiting the site.
PARCEL IN
FORMATION:
Parcel Index Numbers) (PIIS: 0437-85-4509 (5.98 acres) & 0437-87-3286 (39.31 acres)
Site Address: 325 Grove St. & 602 Ann St., Fayetteville, Cumberland County, NC
Deed Book/Page: 4447/0485
Watershed: Cross Creek (Big Cross Creek), 18-27-(3), "C", Cape Fear River 03030004
PROPERTY OWNER INFORMATION:
Name: City of Fayetteville, NC
Address: 433 Hay Street, Fayetteville, NC 28301
Phone No.: ( ) Fax No.: ( ) Mobile No.: ( )
Email:
�OiLN L/./2tN
Property Owner (please print) Date
We hereby certify the above information submitted in this app/ication is true and accurate to
the best of our know/edge,

ProjectArea

ProjectArea

Project Number:
PKS
Project Manager:
1" = 1000'Scale:
5/9/2018Date:
Map Title:
Source:
USGS Map
City of Fayetteville
Cumberland County, NC
Fayetteville & Vander USGS Quads
¯0 1,000 2,000
Feet
13185.D1
PROJECT AREA

Esri, HERE, DeLorme, MapmyIndia, © OpenStreetMap contributors, and the
GIS user community
Project Number:
PKS
Project Manager:
1" = 1000'Scale:
5/9/2018Date:
Map Title:
Source:
Soil Survey Map
City of Fayetteville
Cumberland County, NC
Soil survey Sheets 11 & 12
¯0 1,000 2,000
Feet
13185.D1
PROJECT AREA

ProjectAreaProjectArea
AerialPhotofrom05/2016AerialPhotofrom07/2017
Project:Client:Location:Project No.:Proj. Mgr.:Drawn:Scale:Sheet Title:Sheet No.:REV.DESCRIPTIONAPPR.DATEREVISIONSCROSS CREEK BANK STABILIZATION13185.D1WAKE CO., NCCITY OF FAYETTEVILLE JWSPKSPRELIMINARY
DO NOT USE FOR CONSTRUCTION 1"=60'PHOTO POINTSPHOTO POINTS
NORTH
SCALE 1" = 60'
60 030 60
CONTOUR INTERVAL = 1'
FIGURE 1 - PHOTO POINTS MAP
X
1
2
3
PHOTO POINT
NUMBER & DIRECTION
4 5
6
79
8 10
Note: Site photo from visit by S&EC on 04-12-2018.
Photo 1 - Generally Stable Stream Reach Well Upstream of Repair Area (Looking Downstream) Approx. Start Point for Proposed Repair & Stabilization Activities
Photo 2 - Generally Stable Stream Reach Immediately Upstream of Repair Area (Looking Downstream) Approx. Start Point for Proposed Repair & Stabilization Activities
Photo 3 - Large Debris Pile on Right Channel Bank at Upstream End of Upstream of Repair Area (Looking Downstream)
Photo 4 - Failing Left Channel Bank at Upstream End of Upstream of Repair Area (Looking Downstream) 42' (Approx.)
Photo 5 - Failing Left Channel Bank at Near Mid-point of Repair Area (Looking Downstream) Approx. End Point for Proposed Repair & Stabilization Activities
Photo 6 - Failing Left Channel Bank at Near Downstream End of Repair Area (Looking Upstream) 40' (Approx.)
Photo 7 - Head-cut Near Downstream End of Repair Area (Looking Downstream)
Photo 8 - High Slope Failure Areas as viewed from Right Floodplain Area Upstream High Slope Failure Downstream High Slope Failure Collapsed Asphalt Greenway Trail
Photo 9 - Upstream High Slope Failure as viewed from Right Floodplain Area41 ' (Approx.)Threatened City Structure
Photo 10 - Downstream High Slope Failure as viewed from Right Floodplain Area42' (Approx.) Cemetary w/ Threatened Graves at Top of Slope
Project:Client:Location:Project No.:Proj. Mgr.:Drawn:Scale:Sheet Title:Sheet No.:REV.DESCRIPTIONAPPR.DATEREVISIONSCROSS CREEK BANK STABILIZATION13185.D1WAKE CO., NCCITY OF FAYETTEVILLE JWSPKSPRELIMINARY
DO NOT USE FOR CONSTRUCTION 1"=30'EXISTING SITE CONDITIONSEXISTING SITE CONDITIONS
NORTH
SCALE 1" = 30'
30 015 30
CONTOUR INTERVAL = 1'
NOTES:
1. SITE DATA PROVIDED BY M.A.P.S. SURVEYING INC. OF FAYETTEVILLE, NC
FIGURE 2 - EXISTING SITE CONDITIONS
Upstream High Slope
& Bank Failure Area
Downstream High Slope
& Bank Failure Area
Compromised Graves
at Top of Slope
Compromised
Building
Approx.
Upstream
Limit of
Repairs Approx.
Downstream
Limit of
Repairs
Collapsed Asphalt
Greenway Trail
Approx. Extent of Point Bar
Developed from Rubble & Debris
Note:
Site data provided by M.A.P.S Surveying, Inc. of
Fayetteville, NC.
Notes:
1. Site data provided by M.A.P.S Surveying, Inc. of
Fayetteville, NC.
2. The number, location and extent of in-channel
structures shown is for representation purposes
only and may be modified during final design.
3. The extent and height of boulder toe and bank
protection is for representation purposes only and
may be modified during final design.
Repaired Asphalt
Greenway Trail
Approx. Upstream
Limit of Repairs
Approx.
Downstream
Limit of
Repairs
Steel Sheet Pile Wall w/ Tie-
backs and Engineered Backfill,
Location & Extent Approx.
Stacked Boulder Revetment/Wall
w/ Toe Protection, See Detail
In-channel Boulder Structure
(Typ.), See Details
Existing Channel
Thalweg (Approx.)
Proposed Channel
Thalweg (Approx.)
Regrade Upper Slopes to be
Stabilized w/ Riprap Blanket
or Vegetation
BANK REPAIR & STABILIZATION DETAIL (TYP.)
(NOT TO SCALE)
CONGLOMERATE MIX,
CLASS A & B RIPRAP AND
NCDOT #57 STONE, ENCASED IN
NON-WOVEN GEOTEXTILE
FABRIC, SEE NOTES
REGRADE AND STABILIZE WITH
RIPRAP BLANKET OR VEGETATION
EXISTING ERODED
STREAMBANK (TYP.)
EXISTING
STREAM
BED
BOULDER FOOTERS TO EXTEND
4' MIN. BELOW CHANNEL
INVERT, (TYP.), UNDERLAY WITH
NON-WOVEN GEOTEXTILE
FABRIC, SEE NOTES
ACCUMULATED RUBBLE & DEBRIS
POINT BAR, MATERIAL TO BE
REMOVED, IF SUITABLE REUSE
DURING CONSTRUCTION
REPAIRED STREAM BED
CHANNEL RIGHT
CHANNEL LEFT
STACKED BOULDER TOE
AND BANK PROTECTION, SEE
NOTES
WHERE POSSIBLE EXTEND
BOULDER BANK PROTECTION TO
ELEVATION 5'-7' ABOVE TOP OF
BANK ON RIGHT SIDE OF STREAM Project:Client:Location:Project No.:Proj. Mgr.:Drawn:Scale:Sheet Title:Sheet No.:REV.DESCRIPTIONAPPR.DATEREVISIONSCROSS CREEK BANK STABILIZATION13185.D1WAKE CO., NCCITY OF FAYETTEVILLE JWSPKSPRELIMINARY
DO NOT USE FOR CONSTRUCTION Project:Client:Location:Project No.:Proj. Mgr.:Drawn:Scale:Sheet Title:Sheet No.:REV.DESCRIPTIONAPPR.DATEREVISIONSCROSS CREEK BANK STABILIZATION13185.D1WAKE CO., NCCITY OF FAYETTEVILLE JWSPKSPRELIMINARY
DO NOT USE FOR CONSTRUCTIONBANK REPAIR & STABILIZATION DETAIL NOT TO SCALEBANK REPAIR & STABILIZATION DETAILEXISTING STABLE
FLOODPLAINGEOGRID, SEE
NOTES
W
H
TYPICAL BOULDER CROSS-SECTION DETAIL
(NOT TO SCALE)
INTERIOR
DIMENSIONS
BOULDER EXTERIOR
STEEL SHEET PILE WITH
TIEBACKS AND BACKFILLED
WITH ENGINEERED FILL
1V
0.5H
1V
2H
REPAIRED
GREENWAY
TRAIL
FIGURE 4 - BANK REPAIR & STABILIZATION DETAIL
Project:Client:Location:Project No.:Proj. Mgr.:Drawn:Scale:Sheet Title:Sheet No.:REV.DESCRIPTIONAPPR.DATEREVISIONSCROSS CREEK BANK STABILIZATION13185.D1WAKE CO., NCCITY OF FAYETTEVILLE JWSPKSPRELIMINARY
DO NOT USE FOR CONSTRUCTIONIN-CHANNEL STRUCTURE DETAILS NOT TO SCALEIN-CHANNEL STRUCTURE DETAILSBOULDER J-HOOK WITH STEP DETAIL
(NOT TO SCALE)
CLASS "A", CLASS "B", AND
#57 AGGREGATE STONE MIX
BOULDER STEP
GEOTEXTILE FABRIC
SCOUR POOL
FOOTER
BOULDERS
20°-30° TYP.RIGHT BANKLEFT BANKPLAN
FLOW
DIRECTION
STREAM CHANNEL BED
BANKFULL STAGE
FLOW
CLASS "A", CLASS "B", AND
#57 AGGREGATE STONE MIX
GEOTEXTILE FABRIC FOOTER
BOULDERS
STEP
SCOUR POOL
RIGHT BANK
SCOUR POOL
PROFILE
BOULDER CROSS VANE WITH STEP DETAIL
BOULDERS
FOOTER
FLOW
BANKFULL STAGE
GEOTEXTILE FABRIC
STREAM BED
NOTE:
1. BOULDER CROSS VANE MAY BE
CONSTRUCTED WITH OR WITHOUT STEP
DEPENDING ON SITE CONDITIONS.
2. BOULDER CROSS VANE MAY BE MODIFIED
AND CONSTRUCTED AS BOULDER J-HOOK.
AGGREGATE STONECLASS "A" OR "B"
(NOT TO SCALE)
PROFILE
SCOUR POOLSCOUR POOL
RIGHT BANKLEFT BANKAGGREGATE STONE
CLASS "A" OR "B"
GEOTEXTILE FABRIC
20°-30° TYP.
1/3 BKF1/3 BKF 1/3 BKF
PLAN
FIGURE 5 - IN-CHANNEL STRUCTURE DETAILS
Note:
Boulder cross vane and J-hook structures may be constructed with or without
intermediate step depending on site conditions.