20170438 Ver 1_Bridge 580126 McDowell Plans_20170413

�
�
�
z
Y
T
�
�
N
m
m
�
E
a
�
0
0
U
�Z
�am
�Qm
\NM
m
�o�
� �•�
•�
�
V
W
�
O
�
�
• �
�
V
�
�
0
V
�
GRAPHIC SCALES
50 25 0 50 100
PLANS
50 25 0 50 100
PROFILE (HORIZONTAL)
10 5 0 10 20
PROFILE (VERTICAL)
DESIGN DATA
ADT 2009 = 300
V = 35 MPH
FUNCT. CLASS =
LOCAL
�"I�a'I'I��: C�i�� \(�I'�'I'i-I ��.�I'�(�[.I\.��
ll)l ��l�l(�>\ (�)I�� f-I I� �l-1 \\�.�� �"�
MCDOWELL COUI�TY
-
-$�NS�S 2po7
LOCATION: BRIDGE NO. 126 OVER POND BRANCH ON SR 1560 (OLD UNVILLE ROAD)
TYPE OF WORK: GRADING, PAVING, DRAINAGE AND STRUCTURE
WETLANDS AND SURFACE WATER IMPACTS PERMIT
,
�,
PROJECT LENGTH
LENGTH ROADWAY TIP PROJECT = 0.018 MILES
LENGTH STRUCTURE TIP PROIECT = 0.005 MILES
TOTAL LENGTH TIP PROJECT = 0.023 MILES
P�epo�ed in t� ottice of ,Notte�n & Croig fo�
DIVISION 13
NORTN CAROLINA DEPARTMF,NT OF TR9NSPORTAT/ON
20I2 STANDARD SPEClFICATIONS
JAMES VOSO, PE
LETTING DATE: "R°JE�T FN�I^'EER
DANA BOLDEN,PE
f73'DR9lIT,IGS F,NGINFLR
NCDOT CONTACT: PAUL SPROUSE, PE
D7V7570N 13 BRJDGF. PROJP:CT hLIT:AGER
�
'41'A'16 %'A'IE PROJ¢CI` NBPBNBNC� ti0. �� !H8@IU
A \ n�n �6 ��a��n� JL� �
srn�eraan.�raa r.,�.vna.rro. oesCrtiv�voa
176P.13.R.11 P.E., R.O.W., UTIL.
176P.13.R.11 CONST
ROADWAY DESIGN ENGINEER
r.E.
tcxaruxs:
HYDRAULICS ENGIIVEER
PERMIT DRAWING
SHEET 1 OF 3
PLA11lS PREPARED BY:
�� ��V`I Mattern & Craig
V CONSULTING ENGINEERS • SURVEYORS
12 BROAD STREET
ASHEVILLE, NORTH CAROLINA
�828> 254_220,
FAl( [phone]

PLAN V�Eyy - l"=20'
Ex'iSIrihG I�+AGE
EARTnEN 9E�qr
F�iaoo�Wpre°,E,N�, a
!�
' � � —
�`�—� NAT�NE
d�E
3'G BASKETS SEE S�P G�k
G FL�PLNN pp�
BE�/. SEE ELEyATqN!
GABION BASKETS & EARTHEN BERM DETAIL
SECT�ON A-A - l"=l0'
�',ri'GA�O� BASKETS d/LyE/tT �i�C�'ALLI
nYb eAsirErs N�ra+
5T�RE0 ��5
Z .� � +�
� 6'
� /6'
T X��K II� FL(�OPG
�NE ST E
GABION BASKETS & EARTHEN BEI
ELEVAT�ON V�EW - �"=�0'
�
m
�
a
-o
�
m
�
Y
E
m
�
"s
0
Y
Z
i
�
�
0
�
m
M
0
�\ � — excavAnoN N0\ _
� I '1�— �
— ` ` Q III NG� l5'THICK
GABION BASKE Ea4ryEN eERM E��AHDA y. I I � p FILTER FABRIC rW0
— SEE DETAiL THlS HEET � cA Av�NTA r RiP R4P aass u
BRAS ELL I �I ON CHAI�NEL BANKS
UB i7B PG i92 �;%-O ONLY (7YP1
NA� Zp07 _
NSRS � \ _ 23��
_JI� INLET CHANNEL
NArivE sroNE Eouac ro T I ��or ro sca�, —
CLASS ll R/P RAP AlyO � NG —
— � — —
FILTER FABRIC TYP. O xl � NG� 1 I
lSTRUCTURES PAY /TE�1 / ExcayAnoN
�uI� E�I�IA L.BENFiELD
ANTON�O A14HSERRA DB 203 PG 458 /
�B 975 PC 479
B� GI STA 12+02.86 � EL � STA� 2+27.48 /N r
BEGIN TIP PROJECT l7BP.I3.R.11
-L- STA //+55 �
_— �L �
�ris.imc',rv �
�8� /O+ J` � /"/
J07 F, HALL & CMRIS A. HALL � '�'
DB 670 PG i95 A/A NE ��S�dr�E EOUAL T I
CLA 5 ll RlP RAP AIyD �
FILT R FABRIC TYP,
(STR TURES PA�TE��O I
\� �
�� esNFoao co�11�uMT
BuaoiNc rtT s
DB n5 PG 56
DET AlL
� —
23'-
��/ / CULVERT INTERNAL CHANNEL
I 4 r,yor ra sca e,
� O PLME S/LLS ONE FOOT lNS/DE OF dyLET
BOYD fiAY PXILLIPS &
�/`" I F O / BORIS B. PXILLIPS M'D WTLET OF CULVERT �?H .AN
� I JEFFqEV �. BENF�ELD DB 89 PG 656 ADD/TiONN. SILL IfACF�AY ALONG THE
DB 643 PG 53i / LENGTH OF THE CULV£RT.BACKF/LL {�'lTH
/ NATN£ BED MA7ERed1 5/�I/2AR /N 5/ZE TO
CGA55 'l' RiP R4P. SUBSID/ZE �?H CLA55
'Y RiP RAP iF NEEDEO.
/ / excavar�oN Nc
F==-� � -- �---
� _ / ��1.'.`1. N� /5'THICK
' ,/� �R���'a��� r FILT£R FABRIC M/D
` � .,-.- `�l a'o�,F... �,_�, 2, RlP RAP CLA55 //
`'v�, u� f� ON CHAIyIyEL BNyKS
- � ��9/.4j�� ���� ONLY (TYP1
e \ \\
\
�.,� OUTLE�T TCHANNEL
\�
\ EN� TlP PROJECT I7BP.l3R.lI
;� -L- STA 12+75
� DENOTES IMPACTS IN
OO \ SPECIAL Cu7 DITCH
CONCORD METHODIST CHl1RCH SEE DETAIL 'A'
OB 499 PG 539
HEADWALL/yyING�Y�+LL FACED w/ NATNE
sroNE.
SURFACE WATER
�DENOTES TEMPORARY
IMPACTS IN SURFACE WATER
PROJECT REfERENCE NO. SHEET NO.
l7BP.l3.R.11 2 of 3
2W SHEET NO.
ROADWAY DESIGN HYDRAULICS
ENGINEER ENGINEER
:e f Mattern & Craig
0,///�� CONSULiiNG ENGiNEERS -S�HYErONS
� BROdO SiFEEi
�828x�yi�LZ=�NORFdz�B�e1�25� 4562
50 25 0 550 100
SCALE
PERMIT DRAWING
SHEET 2 OF 3
POND BRANCH
(DWQ CLASS: C,Tr)
DETAIL A
SPECIAL CUT DITCH
( Not to Scale)
Front
�',��c� Ditch
Natural � �F�' Slope
Ground 2; � O
D
Min. D= 2Ft.
FROM -L- STA. 12 + 20 RT TO -L- STA. 12 + 65 RT
� ,....: �.....
10+00 11+00 12+00
, , , , , , , , , , , , , , , , , , , , , , , , , , , , ,, , , , , , , , , , , , , , , ,, , , , , , , , , , , , , , ,�, , , , , , ,.. ., , , ,. . . :
. . . . . . _ . - . � �.
�,S�Q r BEGIN GRADE
STA. 11 + 65.00
EL = 1,789.88 u sra �z+isn -i-
. . . . . . . . . GP = i7AlM
. . . . . . . . - . !O 2.3-tx T-SNA/�/ BOX
. . . . . . . . � $K�NlS
. . . . . . . . . . . . . . . .. . . . ],HOQ BEGIN PROJECT
STA. 11 + 55.00
. . . . . - . . - � . PR�PDSEO
GRADE
BRIDGE HYDRAUUC DAT A
DESIGN DISCHARGE = 480 CFS
DESIGN FREOUENCY = 25 YRS
DESIGN M�Y ELEVATION = 17875 FT
BASE DISCHARGE = 700 CFS
BASE FREOUENCY = l00 YRS
BASE !-lyy ELEVATION = 1789J6 FT
OVERTOPPING DISCHARGE = T50 CFS
OVERTOPPING FREQUENCY = 100+ YRS
OVERTOPPIIyG ELEVATION = 1789.4 FT
= 4-20-10
_ 1782.6 FT
13+00 14+00 15+00 16-�00 17�-00 I
. . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .
END GRADE � $lO
STA. 12+65.00 „ ,
EL = 1.791.00
END PROJECT I . . . . . . . . . . . . . . . . . . . . ..� SOO. .. . . . . .. . . . . .. . . . . .. . . . . .I . .
$TA. 12 + 75.00 �
1,790, r+,�naez � 1,79Q ,
� BLEND
, , , , , , , , , , , , , � _ � � — � BLEND TD �xnn,y� cr+Aoe . �_ � ` , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,
_ . . - . -TO EXIST . . . \ . . . . . . . .
_ EXIST � . . . � . . . . . . . .
. . PflOP !00 YR . - - \
. . . . . . . . . . . . . . . . � � 7 � O .- . .. . _ . . . . �'SE. � i789JG � . . � . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . � . . . . . . . . . . . . . . . . . . . . . . .
PROP Z5 YR .� \ � \ . .� ��O .
.. �ysE • va�5 � r-oseiecr eecKFiu . .
,y�y5 • lT82b - � - � � � � �
- . - . bAre or suavEr 4-zo-ro - iNV = �a � . � . . . . ` . . . . .
� �
1,.77Q ],77Q ... . . . ... . . . . .
1,760 , ,1,760
10+00 11 +00 12+00 13+00 14+00 15+00 16+00 17+00

PLAN V�Eyy - l"=20'
ex'�sIr�Mc c�
EARTnEN 9E�qr
F�iaoo�Wpre°,E,N�, a
!�
' � � —
�`�—� NAT�NE
d�E
3'G BASKETS SEE S�P G�k
G FLOGIDiP1Adj pppY
BE�jdt SEE EtEy�vq^n
GABION BASKETS & EARTHEN BERM DETAIL
SECT�ON A-A - l"=l0'
�',ri'GA�O� BASKETS d/LyE/tT �i�C�'ALLI
nYb eAsirErs N�ra+
5T�RE0 ��5
i � � �
� 6'
� /6'
T X��K II� FL(�OPG
�NE ST E
GABION BASKETS & EARTHEN BEI
ELEVAT�ON V�EW - �"=�0'
c
rn
v
N
a
-o
�
m
�
Y
E
m
�
"s
0
Y
Z
i
�
�
0
�
m
M
0
��--- � excavAnoN Nc
` v �----
` �." G�
� V\ � � , �� �� � �� �� � � i Q, �� � is•rmcK
� ��� \
�E \�� � &�iA � I � p FILTER FABRIG rW0
��A r RlP RAP CLlSS ll
�� DETAIL �fik! 7� � eees�� op cNaNNE� eaYKs
NA�� S � �� � � B �7B �PC M2 � /3'-P OHLY 17YP1
20� � �', � � � � rJ��
� ,, � � �' INLET CHANNEL
���'�r � � � rpor ro scaei
Nt+�ivE SToNE��Fout�c�� �` _ � pc
CLA�S li R�P RAP
� �� l ___
- �� �f ILTtiR FABi,7C TYP,� � � � 5 — — — � —
`° � i N�I� 1 I
/ rsrRucrFiRcS eaYirF�4fi� , +�� , � _ � ExcavanoN
�\ �� � E�IMA L. BENFiELD
� —ANTONiO-MANSERRA DB 203 PG 458
DB 475 PG 473 "
BEGIA,� �UUiERT � rz � t v� fUCVt �4T "
-�- STA �2+0?_.°5 �� _ -L- STA 12+2�.4& /N r
BEGiN T;P PN�JF_CT i7BP.i3.R.N �`
-L- ST.4 /1+55
/ � �i
�� �„��
� — -
_— �
�
. . C SiING .ry I
i0+
—� ; �
�8� ,
J07 F, HALL � CHRI$ A. HALL ���� � �
oe s�o ac �es V/ �� ry'A NE _;TC+�E EZ)d(AL �
� �CLA'S llRiP R.� ANQr�� ',
F/LT 'R F�k�R1�TYP ' �
�� (STIt Til!?�S PAY 7TEb?) ,_ I
�� �� ase�oeo col���y�r
�� i � Bl11LDING RP 3
� - ,— � DB n5 PG 56
DET AlL
��� —
� � z�-
� , CULVERT INTERNAL CHANNEL
� l � q ,,yo� ra �,u�,
I;� / ��. h� / O PLME S/LLS ONE FOOT lNS/DE OF dyLET
BOYD fiAY PXILLIPS &
--�BORIS B. PXILLIPS M'D WTLET OF CULVERT �?H .AN
�� � ��_ __ �� Q �� DB 89 PC 656 ADD/T/ONN. 5/LL HALF�AY ,�1LLONG THE
'^°* "-O� � LENGTH OF THE CULVERT.BACKF/LL {�'lTH
I DB 643 PGi3i � ,yATN£ BED MA7ERed1 5/�I/2AR /ly 5/ZE TO
d / � / / \ CGA55 'l' RiP R4P. SUBSID/ZE �?H CLA55
/ _ j. 'Y RiP RAP iF NEEDEO.
l / � / �\� excavar�oN Nc\�
F � / L — — _
-_ -----� � � �;0+3�/.� — — — �
N l5'THICK
�� �� � i��� � r FILT£R FABRIC M/D
'a° c� � ; av: 0"3� �,=a r RiP RaP aass n
ON CHAIyIyEL BNyKS
i � .�.�s ONLY lTYPJ
"� I z3 -T�
\ \\ r_Y
, ,\ _ OUTLET CHANNEL
\ rNa, ro scuE,
, � \
� \` END TlP rRQ,IECT I7BP.l3.R.!I
�� � -L- ST,4 /2+75
DENOTES IMPACTS IN
� � � SPEC!ni_ CUi Dl7�H �
CON06RD ETHODIST:CMURCH SEE DETAIL ',a'
p6 499 PG 5j�J ,
NcADWAL!_/{�ING�YALL FAC�G ,W/ NA.rNE
CTv^iyc.
SURFACE WATER
�DENOTES TEMPORARY
IMPACTS IN SURFACE WATER
PROJECT REfERENCE NO. SHEET NO.
l7BP.l3.R.11 3 of 3
2W SHEET NO.
ROADWAY DESIGN HYDRAULICS
ENGINEER ENGINEER
:e f Mattern & Craig
0,///�� CONSULiNG ENGiNEERS -S�HYErONS
y z eao�o sraeei
�828�Z5<�itOl�Rsdz�Bie1�25< 4562
so 2s o so ioo
SCALE
PERMIT DRAWING
SHEET 3 OF 3
POND BRANCH
(DWQ CLASS: C,Tr)
DETAIL A
SPECIAL CUT DITCH
( Not to Scale)
Front
�',��c� Ditch
Natural � �F�' Slope
Ground 2; � O
D
Min. D= 2Ft.
FROM -L- STA. 12 + 20 RT TO -L- STA. 12 + 65 RT
� , . . . . : �. . . . .
10+00 11+00 12+00
, , , , , , , , , , , , , , , , , , , , , , , , , , , , ,, , , , , , , , , , , , , , , ,, , , , , , , , , , , , , , ,�, , , , , , ,.. ., , , ,. . . :
. . . . . . _ . - . � �.
�,S�Q r BEGIN GRADE
STA. 11 + 65.00
EL = 1,789.88 u sra �z+isn -i-
. . . . . . . . . GP = i7AlM
. . . . . . . . - . !O 2.3-tx T-SNA/�/ BOX
. . . . . . . . � $K�NlS
. . . . . . . . . . . . . . . .. . . . ],HOQ BEGIN PROJECT
STA. 11 + 55.00
. . . . . - . . - � . PR�PDSEO
GRADE
BRIDGE HYDRAUUC DAT A
DESIGN DISCHARGE = 480 CFS
DESIGN FREOUENCY = 25 YRS
DESIGN M�Y ELEVATION = 17875 FT
BASE DISCHARGE = 700 CFS
BASE FREOUENCY = l00 YRS
BASE !-lyy ELEVATION = 1789J6 FT
OVERTOPPING DISCHARGE = T50 CFS
OVERTOPPING FREQUENCY = 100+ YRS
OVERTOPPIIyG ELEVATION = 1789.4 FT
= 4-20-10
_ 1782.6 FT
13+00 14+00 15+00 16-�00 17�-00 I
. . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .
END GRADE � $lO
STA. 12+65.00 „ ,
EL = 1.791.00
END PROJECT I . . . . . . . . . . . . . . . . . . . . ..� SOO. .. . . . . .. . . . . .. . . . . .. . . . . .I . .
$TA. 12 + 75.00 �
1,790, r+,�naez � 1,79Q ,
� BLEND
, , , , , , , , , , , , , � _ � � — � BLEND TD �xnn,y� cr+Aoe . �_ � ` , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,
_ . . - . -TO EXIST . . . \ . . . . . . . .
_ EXIST � . . . � . . . . . . . .
. . PflOP !00 YR . - - \
. . . . . . . . . . . . . . . . � � 7 � O .- . .. . _ . . . . �'SE. � i789JG � . . � . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . � . . . . . . . . . . . . . . . . . . . . . . .
PROP Z5 YR .� \ � \ . .� ��O .
.. �ysE • va�5 � r-oseiecr eecKFiu . .
,y�y5 • lT82b - � - � � � � �
- . - . bAre or suavEr 4-zo-ro - iNV = �a � . � . . . . ` . . . . .
� �
1,.77Q ],77Q ... . . . ... . . . . .
1,760 , ,1,760
10+00 11 +00 12+00 13+00 14+00 15+00 16+00 17+00

WETLAND PERMIT IMPACT SUMMARY
WETLAND IMPACTS SURFACE WATER IMPACTS
an Existing Existing
Permanent Temp. Excavation Mechanized Clearing Permanent Temp. Channel Channel Natural
Site Station Structure Fillln Fillln in Clearing in SW SW Impacts Impacts Stream
No. (From/To) Size / Type Wetlands Wetlands Wetlands in Wetlands Wetlands impacts impacts Permanent Temp. Design
(ac) (ac) (ac) (ac) (ac) (ac) (ac) (ft) (ft) (ft)
1 11+89±to 12+44± Culvert 0.0046 0.0010 38 7
2 11+89±to 12+44± Riprap Banks 0.0079 51
TOTALS: 0.0125 0.0010 132 7
Revised 3/37/05

��y��'�,�����, North Carolina Department of Transportation
4lC]C1lltL'fi#( !� Highway Stormwater Program
i �`� I
STORMWATER MANAGEMENT PLAN
(Version 2.06; Released June 2016) FOR NCDOT PROJECTS
WBS Element: 17BP.13.R.11 TIP No.: County(ies): Mcdowell Page 1 of 2
General Project Information
WBS Element: 176P.13.R.11 TIP Number: Project T pe: Bridge Replacement Date: 5/13/2013
NCDOT Contact: Paul F. Fisher, P.E. Contractor I Desi ner: Desi ner Dana Bolden - Mattern & Crai Consultin En ineers
Address: H draulics U�it Address: 12 Broad Street
1020 Birch Ridge Road Asheville, N.C. 28801
Ralei h, 27610
Phone: [phone] Phone: [phone]
Email: pfisher ncdot.gov Email: djbolden matternandcrai .com
City/Town: Spruce Pine County ies : Mcdowell
River Basin(s): Catawba CAMA County? No
Wetlands within Project Limits? No
Pro'ect Description
Project Length (lin. miles or feet): 120 Linear Feet Surrounding Land Use: Woods / Residential Area
Proposed Pro'ect Existin Site
Pro'ect Built-Upon Area ac. 0.1 ac. 0.1 ac.
Typical Cross Section Description: Two 10' Travel Lanes with 3' Grassed Shoulders (20' EP to EP) Two 9.6' Lanes without shoulder (19.2' EP to EP)
Annual Avg Daily Traffic (veh/hrlday): Design/Future: 600 Year: 2025 Existin : 300 Year: 2009
General Project Narrative: Project consists of replacing an old timber bridge ( McDowell County Structure # 126) with an aluminum box culvert. The existing bridge is 2@ 9'-3" timber bridge with vertical
(Description of Minimization of Water abutments. The proposed aluminum box culvert is 1@ 23'-4" x 7'-8" buried two feet with a 7' wide low flow channel. Roadway alignments and built upon areas are to remain
Quality Impacts) basicly the same. No structural Stormwater BMP's are associated with this project.
Waterbod Information
Surface Water Body (1): Pond Branch NCDWR Stream Index No.: 11-24-4
NCDWR Surtace Water Classification for Water Body Primary Classification: Class C
Supplemental Classification: Trout Waters Tr
Other Stream Classification: None
Impairments: None
Aquatic T&E Species? No Comments:
NRTR Stream ID: Buffer Rules in Effect: Catawba
Pro'ect Includes Brid e Spannin Water Bod ? No Deck Drains Dischar e Over Buffer? N/A Dissipator Pads Provided in Buffer? N/A
Deck Drains Dischar e Over Water Bod ? N/A (If yes, provide justification in the General Project Narrative) (If yes, describe in the General Project Narrative; if no, justify in the
(If yes, provide justification in the General Project Narrative) General Project Narrative)

1 1i�;1]1�`�11' North Carolina Department of Transportation
�!� )TilltVdfier }
� .� Highway Stormwater Program �.�.
STORMWATER MANAGEMENT PLAN '
(Version 2.06; Released June 2016) FOR NCDOT PROJECTS
WBS Element: 17BP.13.R.11 TIP No.: County(ies): Mcdowell Page 2 of 2
Bridge to Culvert Avoidance and Minimization
Proposed Structure Summary
Sheet No. & Station Sheet No.: 4 Station: 12+15.17 -L- Number of Barrels: 1
Drainage Area (ac or sq mi): 1.31 Sq. Miles Barrel Width/Diameter (ft): 23'-4"
Surface Water Bod : 1 Pond Branch Barrel Hei ht ft : 7'-8"
Culvert T e: Aluminum Box Culvert Culvert Length (ft) 38
Avoidance and Minimization Efforts: Culvert is designed to minimize stream impact by being the minimum length to provide an adequate roadway cross section and by placement at or
(Bridge to Culvert) near natural stream grade. Culvert will include sills and low flow channel to closely match existing stream bed.
Stream Slope Fish and/or Aquatic Life Passage
Existin Avera e Stream Slope %: 4.40 % Existing Low Flow Channel Dimensions The existing low flow channel is approiximately
Proposed Culvert Slope (%): 2.94 % in the Stream: 7 feet wide
Culvert Burial
Proposed Culvert Burial Depth (ft): 2
Ezisting Streambed Material: Cobbles and gravel with some coarse sand Proposed Low Flow Dimensions The low flow channel through the culvert will be
Through the Culvert: 7 feet wide at the base and 9 feet wide at the
Proposed Sills/Baffles: Culvert will include 1 foot sills at each end and at the top
mid-point Existing Low Flow Velocities in the
Stream (ft/s): 7�9 �QS�
ropose ow ow e ocities roug
the Culvert (ft/s): 7'9 �Q5�
Alternating Low Flow Sills/Baffles: The low flow sills will extend the width of the
culvert
Culvert/Stream Ali nment
Stream Patterns Upstream and Downstream The stream is of uniform slope immediately up and down stream of the culvert with no sharp bends
of the Culvert that Could Affect Fish
Passage and Bank Stability:
Bed Forms Impacted by Culvert (riffles, Stream is generally shallow and free flowing through project area; no signifigant bed forms will be impacted
pools, glides, etc.):
Low Flow Floodplain Bench Required? Yes Low flow channel was provided to match existing stream channel
(provide justification)
Sharp Bends at Inlet/Outlet? No
(describe culvert alignment with stream)
Stream Realignment Necessary? (provide No
justification)
Bank Stabilization: Streambanks to be stabilized with Class II rip rap for approximately 30 feet up and down sterem from culvert
Outlet Velocities
Natural Stream Channel 2-yr Velocity (ft/s): 8.0 (Q5) Natural Stream Channel 10-yr Velocity (ft/s): 8.8
Proposed Culvert 2-yr Outlet Velocity (ft/s): 7.9 (Q5) Proposed Culvert 10-yr Outlet Velocity (ft/s): 8.7
Roadway Geometric Considerations
Evaluate/Describe Roadway Geometric Constraints:
The proposed culvert has been designed to generally maintain the roadway alignment with slight improvement to the cross-section.