20200349 Ver 2_04_Blue Ridge_CSR_HOUSECREEK_20200423

CSR BORDER STANDARD SIZENEWEST NON-FEMA
50yr.100yr.FREQUENCYPROPOSEDNATURALEXISTING10yr.PERFORMANCE TABLENCDOTFloodway
With
Floodway
Without
Floodway Established?
Normal Water Surface Elev.
RALEIGH, N. C.
DIVISION OF HIGHWAYS
Project No.
County
On Highway Between and
N. C. DEPARTMENT OF TRANSPORTATION
Recommended Structure
Skew
Bench Mark is
Elev.Datum:
Temporary Crossing
Channel Right O.B.
Hydraulic Design Method
Hydrological Method
FrequencyDischarge Elev.
Elev.
Elev.Frequency
I.D. No.Proj. Station
Obtained From
Flood Study / Status
Flood Study 100 yr. Discharge
Manning's n :Left O.B.
c.f.s.
c.f.s.;
CULVERT SURVEY & HYDRAULIC DESIGN REPORT
Stream
:
Date
Project Engineer
Designed by:
:
Frequency
Design
Base Flood Discharge
Discharge c.f.s.
c.f.s.
Recommended Width of Roadway
Natural Channel Velocity
Design Tailwater
Overtopping :
:
:
Stru. No.
Date Elev.Est. Freq.Source
Period of
Knowledge
Date Elev.Est. Freq.Source Knowledge
Period of
Outlet Velocity
Allowable HW Elev.
Assisted by:
Required Outlet Protection
HYDRAULICS UNIT
Reviewed by:
Recommended Location is (Up, At, Down) Stream from Existing Crossing.I.D. No.Project No.StreamStruc. Inv. No.PDF FileSITE DATA
Historical Flood Information:
DESIGN DATA
INFORMATION TO BE SHOWN ON PLANS
ADDITIONAL INFORMATION AND COMPUTATIONS
10
Q
25
Q
50
Q 100
Q
500
Qft.;ft.;ft.;ft.;ft.
)
10
(V )
10
(Vf.p.s.f.p.s.
yr.
yr.
yr.
ft.
ft.
ft.
100
ft.ft.
ft.
ft.
yr.
yr.
yrs.
yrs.
ft.ft.
WS Elev.:
ft.
Statewide Tier Regional Tier Sub-Regional Tier
Total Waterway Opening Waterway Opening Below 100yr. WS EL.s.f.s.f.
Data on Existing Structure
Character
Data on Structures Up and Down Stream
Stream Classification (Such as Trout, High Quality Water, etc.)
Gage Station No.Period of Records
Max. Discharge Date Frequencyc.f.s
Debris Potential:Low Moderate High
Drainage Area Source
River Basin
yrs.
Total Proposed Waterway Opening s.f.Is a Floodway Revision Required?
Latitude Longitude
WS EL. Taken @ Upstream Culvert Face
WSEL
Inlet Control
H.W.HW/D WSEL
Remarks
H.W.(cfs)
QFREQUENCY
10 YR
50 YR
100 YR
500 YR
1441
2082
2305
2864
OUTLET CONTROL
OUTLET CONTROL
OUTLET CONTROL
OUTLET CONTROL
SIZE & TYPE: 3 @8' X 11' RCBC
INV. IN EL.=215, INV. OUT EL.=214 (BURIED 1')223.5225.8226.4227.2227.3228.3228.5229.0@STATION 1129, APPROX. 8 FT. UPSTREAM OF CULVERTN/A(@ DUPLICATE EFFECTIVE SECTION 1089)@SECTION 1103, 8 FT. FROM US FACE OF CULVERT500yr.N/A221.225yr.N/A222.5222.6222.90.7
0.9
1.0
1.1
7.5
9.2
9.8
10.9
7.5
9.8
10.4
11.2
223.5
225.2
225.8
226.9
223.5
225.8
226.4
227.2
Outlet Control
@ SECTION 1089PERFORMANCE TABLEFEMA100yr.DUPLICATE EFFECTIVEREVISED230.9228.5226.4CORRECTED EFFECTIVE(@ DUPLICATE EFFECTIVE SECTION 1089)8 FT. FROM US FACE OF CULVERT@SECTION 1103107+00106+00(-)8.0000%(-)0.3871%15" C
MP
30" DIP
8" TC
30"
D
I
P8" TC
CONC SW
BSTBOLLARDSSCONC SW
4
8" MT
L
S 25°25'59" W2
41.54'42" RCPS
S
42"
R
C
P42" RCPCITY OF RALEIGHDB 13247 PG 2299PB 2008 PG 234718" CMP15" CMPSDMHTOP=256.57'INV IN=249.72'INV OUT=236.87'SDMHTOP=239.97'INV IN=233.12'INV OUT=232.94'FESIINV=232.02'CROSSWALK POST8" DIPPOSTCROSSWALK SIGNAL 15" RCP
WALKWAYSTONE S 21°06'02" E43.42'96" CMP96" CMPBOLLARDS48" MTL
18" RCPINV=239.62'CB-1302CB-1303DI-1301SSMH-1301CB-1304SSMH-1303SSMH-1302HOUSE CREEK GREENW
AYEXISTING R/
W EXISTING R/
W
40' CITY
O
F RALEI
G
H SA
NI
TA
RY SEW
ER EA
SEM
EN
T0.00883(LEFT)TOP OF BANK BANK (RIGHT)TOP OF EXISTING 2 @ 96" CMP(LEFT)TOP OF BANK (LEFT)TOP OF BANK CHANNEL LCCHANNEL LCEXISTING GROUNDRIP RAPCLASS IITOP OF BANK(BLUE RIDGE RD)-L- SR 1670VALLEY AVECRABTREE (DURALEIGH ROAD)SR 1664-G2--G2-0.026"6'GROUNDEXISTING18'2.5'10'THIS LINEGRADE TO 2'8"6"WALLRETAININGFENCEPEDESTRIAN1'-L- STA 104+95.00 TO 107+75.00 (RT)-L- STA 106+80.00 TO 110+00.00 (LT)MATCHLINE ROADWAY TYPGROUNDEXISTINGPOINTGRADEGROUNDEXISTING5'5'3'3'1:11:12:10.022'THIS LINEGRADETO6:18"-G2- STA 10+00.00 TO 22+26.002'3:1TYPICAL SECTION TYPICAL SECTION-G2- ALIGNMENT100-YR W.S.EL. = 226.4' W.S.EL. = 225.8'DESIGN (50-YR)100-YR W.S.EL. = 226.4' W.S.EL. = 225.8'DESIGN (50-YR) W.S.EL. = 225.8'DESIGN (50-YR)= 226.4'W.S.EL. 100-YR EXISTING GROUND= 216.3'NORMAL W.S.EL. (OBSERVED 02/26/18)(OBSERVED 02/26/18)= 216.3'NORMAL W.S.EL. 2 @ 96" CMPREMOVE EXISTING 2 @ 96" CMPEXISTING PROPOSED GRADEBRIDGEPROPOSED PEDESTRIAN RIP RAP (TYP)CLASS II HOUSE CREEK
135°C(BURIED 1')3 @ 8' X 11' RCBC SKEW = 135° GRADE POINT ELEV = 236.09'L STA 107+45.6 -L-STA 107+45.6-L-BURIED 1'3 @ 8' X 11' RCBCC135°STA 106+60.7 -L-1 @ 14' X 10' RCBCC1 @ 14' X 10' RCBC SKEW = 135° GRADE POINT ELEV = 240.71'L STA 106+60.7 -L-C= 223.2'INV AT L0.0037 ft/ft0.0093 ft/ft= 214.50'INV AT L(BURIED 1')3 @ 8' X 11' RCBC SKEW = 135° GRADE POINT ELEV = 236.09'L STA 107+45.6 -L-CBURIED 1'3 @ 8' X 11' RCBC C1 @ 14' X 10' RCBC SKEW = 135° GRADE POINT ELEV = 240.71'L STA 106+60.7 -L-INSET 2' 1' CONCRETE SILLINSET 2' 1' CONCRETE SILLBANKS ONLY (TYP.)KEYED-IN ON 12GEOTEXTILE (TYP.)1' SILL12TIE TO FILL SLOPERIP RAP CLASS II INSTALL 2.0' OF PEDESTRIAN1 @ 14' X 10' RCBC BRIDGEPEDESTRIAN PROPOSED INSET 2' 1' CONCRETE SILLS24"
JB W/ MH15" RCP-IV
18" RCP-IVOF 18" RCPREMOVE 35 L.F. RETAINJB W/ MHCB-GTO JB W/ MHCONVERT CB
RCP-IV18" JB W/ MH18" RCP-IV15" RCP-IVCB-GSYSTEMREMOVEFFFFFFCCCCCFCCCFFCCCFFCC15+00O OOO
1" = 10' V1" = 50' HSCALEUSGS STREAMSTATS
NEUSE
CLASS C; NSW
60 LF 2 @ 96" CMP
DS => 0.02 MI DOWNSTREAM AT CRABTREE VALLEY AVE., 2 @ 8' X 8' RCBC
US => 0.06 MI UPSTREAM AT I-440, 2 @ 8' X 10'
YESREVISED 3/31/2015
PRELIMINARY FIS #37183CV000C, DETAILED STUDY,
0.015-0.15
WAKE
(BLUE RIDGE ROAD)
SR 1670
CRABTREE VALLEY AVE
33' EOT TO EOT
BM10 -L- 112+77.96 642.74' LT (NAIL SET IN 13" POPLAR) N 759600 E 2095583
NOT REQUIRED
NAVD 88
(B18, S36)HOUSE CREEK N/A
N/A ES-2019-04
135°
-78.67739 35.83441
X
HOUSE CREEK (BASIN 18, STREAM 9)N/AN/AFEMA: DETAILED STUDY
BASIN: NEUSE
AGRICULTURAL, FUTURE DEVELOPMENT ANTICIPATED
USGS REGION 1, RESIDENTIAL, COMMERCIAL,
X
ES-2019-04230220210200240240230220210200240230220210250250240230220210107+00106+00109+00108+00110+0011+0012+0013+0014+0015+002102202302402502001" = 10' V1" = 50' HSCALE16+00105+00104+00103+00111+00112+0025024023022020019050050100150200250AMANDA DARROW, E.I.T
JENNIFER MURPHY, P.E
CHANGE IN SKEW
AT EXISTING LOCATION:
PEDESTRAIN CULVERT)
(106+60.7 -L- SOIL TYPE: SANDY LOAM SOILS WITH MODERATE DEBRIS POTENTIAL. BY PROPOSED STRUCTURE. NO STRUCTURES UPSTREAM OR DOWNSTREAM WILL BE AFFECTED(NOT TO SCALE)LOOKING DOWNSTREAMTYPICAL SECTION - INLET CHANNEL IMPROVEMENTSFIS
PRELIMINARY
0.015-0.15
2305 230.9 231.0 910000_2019_HOUSECREEK_SR1670.PDFN/A CULVERT PROFILE VIEW - HOUSE CREEK GREENWAY -G2-2.8 SQ. MI250200150100
PRELIMINARY FLOOD INSURANCE STUDY (FIS) #37183CV000C
6.0 N/A 8.9 9.2 9.8
240
PEDESTRIAN CULVERT
140 S.F. ADDITIONAL OPENING
3.6
CLASS II RIP RAP
2082
2305
50
JENNIFER MURPHY, P.E
Q500 = 2864 CFS
Q100 = 2305 CFS
Q50 = 2082 CFS
Q10 = 1441 CFS
PRELIMINARY FEMA DISCHARGES FROM MODEL
ENGINEER HAS BEEN CONTACTED, BUT THERE HAS BEEN NO RESPONSE AT THIS TIME.
HISTORICAL FLOOD INFORMATION: NO RESIDENTS WERE AVAILABLE AT TIME OF FIELD VISIT. DIVISION MAINTENANCE
SEE ADDITIONAL INFORMATION
7.5WALLRETAININGWALLRETAINING CULVERT PROFILE VIEW - BLUE RIDGE RD OVER HOUSE CREEKOVERTOPPING ELEV. 226.21AND MAY BE SUBJECT TO PERMIT CONDITIONS.
AT THE PROJECT SITE DURING CULVERT CONSTRUCTION. NATIVE MATERIAL IS SUBJECT TO APPROVAL BY THE ENGINEER
- NATIVE MATERIAL CONSISTS OF MATERIAL THAT IS EXCAVATED FROM THE STREAM BED OR FLOODPLAIN
- CULVERT BARRELS WITH SILLS SHOULD BE BACK FILLED WITH NATIVE MATERIAL TO SILL HEIGHT.
OF CULVERT, PERPENDICULAR TO CULVERT WALLS AND INSET 2.0' FROM ENDS OF CULVERT.
- SILLS SHOULD BE CONSTRUCTED IN THE BARRELS AT THE INLET AND OUTLET
110.5 SF 100.5 SF
N/A N/A
N/A
02/26/18
216.3 FT OBSERVED
0.048-0.065
N/A
HEC-RAS VERSION 5.0.5 (FILE: HOUSECREEK(B18,S3.PRJ)
100
YES
107+45.6 -L-;
I-440
107.5 LF 3 @ 8' X 11' RCBC BURIED 1' WITH 1' SILLS AND BEVELED INLET AT 107+45.6 -L-
AND 107.5 LF 1 @ 14' X 10' RCBC PEDESTRIAN CULVERT AT 106+60.7 -L-
229.04
2305 LEFT SHOULDER @ STA 111+00 -L- 226.21
Q500 = 2420 CFS = 2400 CFS
Q100 = 1920 CFS = 1900 CFS
Q50 = 1690 CFS = 1700 CFS
Q25 = 1470 CFS = 1500 CFS
Q10 = 1170 CFS = 1200 CFS
SIR 2014-5030, DA = 2.8 SQ.MI., % IMP = 20
USGS URBAN REGRESSION (100% HYDROLOGIC REGION 1)
PROVIDED IN THIS CSR AS WATER SURFACE ELEVATIONS WOULD BE LOWER THAN THE 10-YEAR.
EVENT HAS A LARGER PEAK FLOW THAN THE USGS 25-YEAR EVENT , THE DATA FOR THE USGS 25-YEAR IS NOT
HYDROLOGIC DATA FOR THE FEMA 25-YEAR EVENT WAS NOT PROVIDED. AS THE PRELIMINARY FEMA 10-YEAR
CALCULATED USGS FLOW RATES, AND THEY WERE USED AS THE DESIGN FLOWS FOR THIS ANALYSIS. THE
ON AN IMPERVIOUS PERCENTAGE OF 20%. THE PRELIMINARY FEMA FLOW RATES WERE HIGHER THAN THE
EQUATIONS (SIR 2014-5030) AND PRELIMINARY FEMA VALUES. THE USGS DISCHARGES WERE CALCULATED BASED
HYDROLOGIC DATA USED FOR THIS ANALYSIS WAS THE GREATER DISCHARGE BETWEEN THE USGS REGRESSION
MODEL FOR THE AREA RECEIVED FROM NCFMP AND IMPORTED TO HEC-RAS 5.0.7.
HEC-RAS 4.1.0 MODEL. THE HYDRAULIC ANALYSIS FOR THESE CULVERTS WAS BASED ON THE PRELIMINARY FEMA
THE WAKE COUNTY PRELIMINARY FIS REVISED MARCH 31, 2015. THE PRELIMINARY HYDRAULIC MODEL IS A
COUNTY, NC REVISED APRIL 16, 2013 (FIS #37183CV000). HOUSE CREEK IS ALSO A DETAILED STUDY STREAM IN
HOUSE CREEK IS A FEMA REGULATED DETAILED STUDY STREAM AS SHOWN IN THE EFFECTIVE FIS FOR WAKE
WITH 3 @ 8'X11' RCBC BURIED 1' WITH 1' SILLS IN ALL BARRELS AND A 1 @ 14'X10' RCBC PEDESTRIAN CULVERT.
THIS PROJECT PROPOSES THE REPLACEMENT OF THE 2 @ 96" CMP ALONG HOUSE CREEK UNDER SR 1670
FUTURE LOW-DENSITY RESIDENTIAL DEVELOPEMENT WITHIN THE DRAINAGE AREA.
MATCHING THE FUTURE LAND USE CLASSIFICATION. % IMP WAS ROUNDED UP TO 20% TO ACCOUNT FOR ADDITIONAL
THE CITY OF RALEIGH FUTURE LAND USE MAP. A MAJORITY OF THE DRAINAGE AREA IS ALREADY DEVELOPED
PERCENT IMPERVIOUS (% IMP) FOR USGS 2014-5030 WAS BASED COMPARING EXISTING % IMP FROM STREAMSTATS TO
*
*
228.5'FEMA 100-YR WSEL
CORRECTED EFFECTIVE
COMPARISON TO CORRECTED AND REVISED PLANS
REPORTED NATURAL CHANNEL VALUES ARE BASED ON USING FEMA FLOW RATES FOR MORE ACCURATE
SEE ADDITIONAL INFORMATION
225.8
226.4
-L-2 @ 96" CMPEXISTINGUPSTREAMNATURAL GROUNDDOWNSTREAMNATURAL GROUNDGROUNDEXISTINGQUANTITY ESTIMATE 50 CY CHANNEL 130 CY CULVERTEXCAVATION 145 TONSCLASS 'II' RIPRAP