19940379 Ver 1_COMPLETE FILE_19940503

State of North Carolina
Department of Environment,
Health and Natural Resources A715WA •
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
E H N
ry
A. Preston Howard, Jr., P.E., Director
May 3, 1994
Charlotte-Mecklenburg Schools
701 East 2nd Street
Charlotte, N.C. 28202
Dear Sirs:
Subject: Proposed fill in Wetlands or Waters
North elementary school
Mecklenburg County
DEM Project #94379
We have reviewed your request for 401 Water Quality Certification
to place fill material in 0.60 acres of wetlands or waters which are
tributary to Irwin Creek for new elementary school development located
at Hwy. 115 and SR 2519 in Mecklenburg County as described in your
submittal dated 29 April 1994. Based on this review, we have
determined that the proposed fill is covered by General Water Quality
Certification No. 2671. A copy of the General Certification is
attached. This Certification is necessary for coverage under Corps of
Engineers' Nationwide Permit No. 26. This action completes DEM's
review under Section 401 of the Clean Water Act.
If this Certification is unacceptable to you, you have the right
to an adjudicatory hearing upon written request within thirty (30)
days following receipt of this Certification. This request must be in
the form of a written petition conforming to Chapter 150B of the North
Carolina General Statutes and filed with the Office of Administrative
Hearings, P.O. Box 27447, Raleigh, N.C. 27611-7447. Unless such
demands are made, this Certification shall be final and binding.
1786.
If you have any questions, please contact John Dorney at 919-733-
Sincerely,
P.rLeston Howar Jr. P.E.
94379.1tr
Attachment
cc: Wilmington District Corps of Engineers
Corps of Engineers Asheville Field Office
Mooresville DEM Regional Office
Mr. John Dorney
Central Files
Frank Craig; W K Dickson & Company
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post-consumer paper
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W.K. DICKSON & COMPANY, INC.
1924 CLEVELAND AVENUE
CHARLOTTE, NC 28203
[phone] FAX: [phone]
TO:
IV , O? ?lVll/?Intn-?fL??
We are sending you: ? Attached
? Shop Drawings
? Copy of Letter
LETTER OF TRANSMITTAL
DATE: 4115 k JOB NO: a'?(?p, , a
ATTENTION: A Fvy r, 1
RE: No v,+(4 v-4-v., G Ow- f
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? Under separate cover via _
? Prints ? Plans
? Change Order ?
the following items:
? Samples ? Specifications
COPIES DATE NO. DESCRIPTION
-? 41-

• a - /Ldv Si ! S (d K,/T LLB

THESE ARE TRANSMITTED as checked below:
t9 For Approval ? Approved as submitted
? For your use ? Approved as noted
? As requested ? Returned for corrections
? For review and comment ?
? FOR BIDS DUE 19 ? PRINTS RETURNED AFTER LOAN TO US
REMARKS: T6 T )'k, a ; I I I
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26 °Yo ; c4- -k4 A 44 5; .,e.A 1, 2
COPY TO: SIGNED: Dirt-, J• ? ?
TR-L\S.?M4
? Resubmit eesfor approval
? Submit copies for distribution
? Return corrected prints
DEM ID: ACTION ID:
NATIONWIDE PERMIT REQUESTED (PROVIDE NATIONWIDE PERMIT 0):
JOINT FORM FOR
NATIONWIDE PERMITS THAT REQUIRE NOTIFICATION TO THE CORPS OF ENGINEERS
NATIONWIDE PERMITS THAT REQUIRE APPLICATION FOR SECTION 401 CERTIFICATION
WILMINGTON DISTRICT ENGINEER
CORPS OF ENGINEERS
DEPARTMENT OF THE ARMY
P.O. BOX 1890
WILMINGTON, NC 28402-1890
ATTN: CESAW-CO-E
Telephone [phone]
WATER QUALITY PLANNING
DIVISION OF ENVIRONMENTAL MANAGEMENT
NC DEPARTMENT OF ENVIRONMENT, HEALTH,
AND NATURAL RESOURCES
P.O. BOX 29535
RALEIGH, NC 27626-0535
ATTN: MR. JOHN DORNEY
Telephone [phone]
ONE (1) COPY OF THIS COMPLETED APPLICATION SHOULD BE SENT TO THE CORPS OF
ENGINEERS. SEVEN (7) COPIES SHOULD BE SENT TO THE N.C. DIVISION OF
ENVIRONMENTAL MANAGEMENT. PLEASE PRINT.
1. OWNERS NAME : t*1a4/60T"rG
2. OWNERS ADDRESS:
Z"A
4 2ND
3. OWNERS PHONE NUMBER (HOME):
4. IF APPLICABLE: AGENT'S NAMM7 OR RE PONSIBLE C
PHONE NUMBER: ?A -co ,??sEv ?M Cvn
?i3? I ? 'Q'i VG
5. LOCATION OF WORK (MUST A
NEAREST TOWN OR CITY:
SPE,CIF7C LOCATION (INCLU
J
(WORK): (10-4) 3I q --700c,
TE OFFICIAL, ADDRESS,
_ -j- .L. i
- 10(70 I
'AC r? P) . COUNTY: "d1
I??oG W-,-
ROAD
NUMB E
LANDMARKS ETC.):
4ooa ' t w- r 1vw ? ?4, -,.
1a s., ,4,A tAA,
6. NAME OF CLOSEST ??S11TREAM/RIVER:IM/??? ?il?•Cl?W
7. RIVER BASIN: L4&wbo.,
8. IS THIS PROJECT LOCATED IN A WATERSHED CLASSIFIED AS TROUT, SA, HQW, ORW,
WS I, OR WS II? YES ( j NO ()(J
9. HAVE ANY SECTION 404 PERMITS BEEN PREVIOUSLY REQUESTED FOR USE ON THIS
PROPERTY? YES ( J NO (XJ
IF YES, EXPLAIN.
10. ESTIMATED TOTAL NUMBER OF ACRES OF WATERS OF THE U.S., INCLUDING
WETLANDS, LOCATED ON PROJECT SITE: Z. ZR At, wt4;, o
6/10/92

-2-
11. NUMBER OF ACRES OF WATERS OF THE U.S., INCLUDING WETLANDS, IMPACTED BY
THE PROPOSED PROJECT: ,I--
FILLED: t5lo i
DRAINED: O
FLOODED: fI
EXCAVATED: O
TOTAL IMPACTED:
12. DE SCRI1R.TION OF PROPOSED WORK (ATTACH PLANS )
13.
+I
14. STATE REASONS WHY THE APPLICANT BELIEVES THAT THIS ACTIVITY MUST BE
CARRIED OUT IN WETLANDS. ALSO, NOTE MEASURES TAKEN TO MINIMIZE WETLA D
IMPACTS.
lltv_ .i C r? iVl bAkf f dt Si
G+ /Iik ?kdt +iJ WlaS CAVj??rd ri
15. YOU ARE REQUIRED TO CONTACT THE U.S. FISH AND WILDLIFE SERVICE
(USFWS) AND/OR NATIONAL MARINE FISHERIES SERVICE (NMFS) REGARDING THE PRESENCE
OR ANY FEDERALLY LISTED OR PROPOSED FOR LISTING ENDANGERED OR THREATENED
SPECIES-OR CRITICAL HABITAT IN THE PERMIT AREA THAT MAY BE AFFECTED BY THE
PROPOSED PROJECT. HAVE YOU DONE SO? YES ( ) NO (x)
RESPONSES FROM THE USFWS AND/OR NMFS SHOULD BE FORWARDED TO CORPS.
16. YOU ARE REQUIRED TO CONTACT THE STATE HISTORIC PRESERVATION OFFICER
(SHPO) REGARDING THE PRESENCE OF HISTORIC PROPERTIES IN THE PERMIT AREA WHICH
MAY BE AFFECTED BY THE PROPOSED PROJECT?
HAVE YOU DONE SO? YES ( ) NO (?)
RESPONSE FROM THE SHPO SHOULD BE FORWARDED TO CORPS.
17. ADDITIONAL INFORMATION REQUIRED BY DEM:
./A. WETLAND DELINEATION MAP SHOWING ALL WETLANDS, STREAMS, AND LAKES ON
THE PROPERTY.
B. IF AVAILABLE, REPRESENTATIVE PHOTOGRAPH OF WETLANDS TO BE IMPACTED BY
PROJECT.
C. IF DELINEATION WAS PERFORMED BY A CONSULTANT, INCLUDE ALL DATA SHEETS
RELEVANT TO THE PLACEMENT OF THE DELINEATION LINE.
D. IF A STORMWATER MANAGEMENT PLAN IS REQUIRED FOR THIS PROJECT, ATTACH
COPY.
E. WHAT IS LAND USE OF SURROUNDING PROPERTY? Cm, C!Gh 0
F. IF APPLI?jCABLE, WHAT IS PROPOSED METHOD OF SEWAGE DISPOSAL?
/A klvn h St?l -fD fiQ4 ht GM V R h-.
9
OWNER' SIGNATURE DA E
}
U.S. Fish & Wildlife
330 Ridgefield Court
Asheville, NC 28806
[phone]
Service U.S. Army Corps of Engineers
Regulatory Field Office
Room 75, Grove Arcade Building
37 Battery Park Ave.
Asheville, NC 28801-2714
[phone]
State Historic Preservation Office
NC Division of Archives & History
109 East Jones St
Raleigh, NC 27601
[phone]
Water Quality Planning
Division of Environmental Management
NC Dept. of,Environment, Health &
Natural Resources
PO Box 29535
Raleigh, NC 27626-0535
Attn: John Dorney
[phone]
Wildlife Resources Commission Fisheries Biologists
District 7 District 8 District 9
Joe Mickey Chris Goudreau Micky Clemmons
Rt 2 Box 278 Rt 6 Box 685 Rt 1 Box 624
State Road, NC 28676 Marion, NC 28752 Waynesville, NC
[phone] [phone] [phone]
Counties Counties Counties
Alleghany Avery Buncombe
Ashe Burke Cherokee
Stokes Caldwell Clay
Surry McDowell Graham
Watauga Mitchell Haywood
Wilkes Rutherford Henderson
Yancey Jackson
Macon
Madison
Polk
Swain
Transylvania
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W.K. DICKSON & COMPANY, INC.
1924 CLEVELAND AVENUE
CHARLOTTE, NC 28203
[phone] FAX: [phone]
TO:
1 CMvW)ftWj, I ,7?
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DATE: JOB NO: p, pp
ATTENTION:
RE: {? J NHI?k 644 re
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We are sending you: ? Attached ? Under separate cover via _
? Shop Drawings ? Prints ? Plans
? Copy of Letter ? Change Order ?
the following items:
? Samples ? Specifications
COPIES DATE NO. DESCRIPTION

1
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THESE ARE TRANSMITTED as checked below:
X For Approval ? Approved as submitted
? For your use ? Approved as noted
? As requested ? Returned for corrections
? For review and comment ?
? FOR BIDS DUE 19
? Resubmit copies for approval
? Submit copies for distribution
? Return corrected prints
? PRINTS RETURNED AFTER LOAN TO US
t
COPY TO: SIGNED:
TR.-1.\ S. P.%14

A 16
W. K. DICKSON & COMPANY, INC.
CONSULTING ENGINEERS
WKD#: Aktl? EtJ '7 a?(? COMPUTED BY. DATE:
DESCRIPTION: 2ti L ??'1cn1 CHECKED BY: DATE:
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CONSULTING ENGINEERS
WKD#: Not l ?Ptn+? '± / COMPUTED BY: Lei DATE: 4,16 'jf
DESCRIPTION: 1t brl y A'C! T? - 'on1 CHECKED BY. DATE:
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THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW
THE DEFINITIONS OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE.
THE DEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTRAN77 VERSION
NEW OPTIONS: DAMBREAK OUTFLOW SUBMERGENCE , SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY,
DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND AMPT INFILTRATION
KINEMATIC WAVE: NEW FINITE DIFFERENCE ALGORITHM
HEC-1 INPUT PAGE 1
LINE ID.. ..... 1... .... 2. ......3.. .....4... ....5..... ..6... ....7..... ..8 .......9......10
1 ID NORTH ELEMENTARY SCHOOL
2 ID 2 YEAR STORM STORMWATER DETENTION BASIN
3 ID PRE DEVELOPMENT
4 IT 2 0 0 288
5 IO 5 0 0
6 KK RUNOFF FROM AREA
7 PH 0 0 0.42 0.83 1.45 1. 76 1.95 2 .28
8 KM 0 0 0.59 1.27 2.38 2. 93 3.24 3 .76
9 KM 0 0 0.75 1.62 3.05 3. 78 4.20 4. 92
10 KM 0 0 0.83 1.78 3.34 4. 12 4.56 5. 34
11 BA 0.026
12 LS 0 58
13 UD 0.2
14 ZZ
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FLOOD HYDROGRAPH PACKAGE (HEC-1) • + DODSON AND ASSOCIATES, INC. `
BY THE COE IN FEBRUARY 1981 • * HYDROLOGIST AND CIVIL ENGINEERS
REVISED 02 AUG 88 • + 7015 W TIDWELL SUITE 107
HOUSTON, TEXAS 77092
RUN DATE 04/16/1994 TIME

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NORTH ELEMENTARY SCHOOL
2 YEAR STORM STORMWATER DETENTION BASIN
PRE DEVELOPMENT
5 IO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 2 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
y?
ITIME 0000
NQ 288
NDDATE 1 0
NDTIME 0934
ICENT 19
COMPUTATION INTERVAL
TOTAL TIME BASE
STARTING TIME
NUMBER OF HYDROGRAPH ORDINATES
ENDING DATE
ENDING TIME
CENTURY MARK
.03 HOURS
9.57 HOURS
ENGLISH UNITS
DRAINAGE AREA SQUARE MILES
PRECIPITATION DEPTH INCHES
LENGTH, ELEVATION FEET
FLOW CUBIC FEET PER SECOND
STORAGE VOLUME ACRE-FEET
SURFACE AREA ACRES
TEMPERATURE DEGREES FAHRENHEIT
RUNOFF SUMMARY
FLOW IN CUBIC FEET PER SECOND
TIME IN HOURS, AREA IN SQUARE MILES
PEAK TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD
OPERATION STATION FLOW PEAK 6-HOUR 24-HOUR 72-HOUR
HYDROGRAPH AT RUNOFF 1. 3.60 0. 0. 0.
•* NORMAL END OF HEC-1 ...
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FLOOD HYDROGRAPH PACKAGE (HEC-1) +
BY THE COE IN FEBRUARY 1981
REVISED 02 AUG 88 '
RUN DATE 04/16/1994 TIME 10:27:59
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X X XXXXXXX XXXXX X
X X X X X XX
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BASIN
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MAXIMUM TIME OF
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• HOUSTON, TEXAS 77092
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THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW.
THE DEFINITIONS OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE.
THE DEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTRAN77 VERSION

TIME IN HOURS, AREA IN SQUARE MILES
PEAK TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD BASIN MAXIMUM TIME OF
OPERATION STATION FLOW PEAK 6-HOUR 24-HOUR 72-HOUR AREA STAGE MAX STAGE
HYDROGRAPH AT RUNOFF 10. 3.33 2. 1. 1. .03
•• NORMAL END OF HEC-1 ++•
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FLOOD HYDROGRAPH PACKAGE (HEC-1)
BY THE COE IN FEBRUARY 1981
REVISED 02 AUG 88
RUN DATE 04/16/1994 TIME 10:31:08 +
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• DODSON AND ASSOCIATES, INC.
• HYDROLOGIST AND CIVIL ENGINEERS
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• HOUSTON, TEXAS 77092
• [phone]
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X X XXXXXXX XXXXX X
X X X X X XX
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THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW
THE DEFINITIONS OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE.
THE DEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTRAN77 VERSION
NEW OPTIONS: DAMBREAK OUTFLOW SUBMERGENCE , SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY,
DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND AMPT INFILTRATION
KINEMATIC WAVE: NEW FINITE DIFFERENCE ALGORITHM
HEC-1 INPUT
LINE ID. ...... 1.. ..... 2. ......3. ......4.......5.......6... ....7.......8.......9......10
1 ID NORTH ELEMENTARY SCHOOL
2 ID 10 YEAR STORM STORMWATER DETENTION BASIN
3 ID PRE DEVELOPMENT
4 IT 2 0 0 288
5 IO 5 0 0
6 KK RUNOFF FROM AREA
7 KM 0 0 0.42 0.83 1.45 1.76 1.95 2.28
8 PH 0 0 0.59 1.27 2.38 2.93 3.24 3.76
9 KM 0 0 0.75 1.62 3.05 3.78 4.20 4.92
10 KM 0 0 0.83 1.78 3.34 4.12 4.56 5.34
PAGE 1
6.
11 BA 0.026
12 LS 0 58
13 UD 0.2
14 ZZ
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FLOOD HYDROGRAPH PACKAGE (HEC-1)
BY THE COE IN FEBRUARY 1981 +
REVISED 02 AUG 88
RUN DATE 04/16/1994 TIME 10:31:08 '
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• DODSON AND ASSOCIATES, INC. +
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* 7015 W TIDWELL SUITE 107 +
• HOUSTON, TEXAS 77092 +
' [phone]
I +
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NORTH ELEMENTARY SCHOOL
10 YEAR STORM STORMWATER DETENTION BASIN
PRE DEVELOPMENT
5 IO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYCRCGRAPH TIME DATA
NMIN 2 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
ITIME 0000 STARTING TIME
NQ 288 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 1 0 ENDING DATE
NDTIME 0934 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .03 HOURS
TOTAL TIME BASE 9.57 HOURS
ENGLISH UNITS
DRAINAGE AREA SQUARE MILES
PRECIPITATION DEPTH INCHES
LENGTH, ELEVATION FEET
FLOW CUBIC FEET PER SECOND
STORAGE VOLUME ACRE-FEET
SURFACE AREA ACRES
TEMPERATURE DEGREES FAHRENHEIT
OPERATION STATION
HYDROGRAPH AT RUNOFF
RUNOFF SUMMARY
FLOW IN CUBIC FEET PER SECOND
TIME IN HOURS, AREA IN SQUARE MILES
PEAK TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD BASIN
FLOW PEAK 6-HOUR 24-HOUR 72-HOUR AREA
10. 3.33 2. 1. 1. .03
MAXIMUM TIME OF
STAGE MAX STAGE
NORMAL END OF HEC-1 ••.
W. K. DICKSON & COMPANY, INC.
CONSULTING ENGINEERS
WKD#: 4116,01 C I Syr , ,Aec._J COMPUTED BY: DATE: I6
DESCRIPTION: CHECKED BY. DATE:
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W. K. DICKSON & COMPANY, INC.
CONSULTING ENGINEERS
WKD#: V?%G C peon,! rAm COMPUTED BY. _ DATE: _ 4
DESCRIPTION: CHECKED BY: DATE:
SHEET OF
p eq. Obi -
Gay = ? ? (? Ca ? 2 l i - ?:?? I • ? -%'?,

ri, '1L - U (ri-:3I I VCpr 3

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IS¢S3
1?31? l8??3
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TWO ?I4R8
Z1 ? 38
Iqq?? ?=71?
?2! ?'? D?Zi?icG I? D 112
6?=
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4A 7
?zr
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OF RESERVOIR DEPTH STORAGE OUTFLOW OVER TOP MAX OUTFLOW FAILURE
PMF W.S.ELEV OVER DAM AC-FT CFS HOURS HOURS HOURS
1.00 769.04 .04 2. 4. 1.87 4.57 .00
*• NORMAL END OF HEC-1 •*•
+i4r444xaafi444ffif4faYYffifia?41?Iarflf?
FLOOD HYDROGRAPH PACKAGE (HEC-1)
BY THE COE IN FEBRUARY 1981
REVISED 02 AUG 88
RUN DATE 04/18/1994 TIME 08:37:56 `
.eiffa+a444 a ..11Yi444ffxxlr4a444rff xixi
a44f 4airrr4r444f raf si r•4ffraiYtffrrriYf
r f
DODSON AND ASSOCIATES, INC.
' HYDROLOGIST AND CIVIL ENGINEERS
• 7015 W TIDWELL SUITE 107
' HOUSTON, TEXAS 77092
• [phone] `
?:friiYf rfxaeYffff rxaaaaaatiakr?xrefair
X X XXXXXXX XXXXX X
X X X X X XX
X X X X X
XXXXXXX XXXX X XXXXX X
X X X X X
X X X X X X
X X XXXXXXX XXXXX XXX
THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW
THE DEFINITIONS OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE.
THE DEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTRAN77 VERSION
NEW OPTIONS: DAMBREAK OUTFLOW SUBMERGENCE , SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY,
DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND AMPT INFILTRATION
KINEMATIC WAVE: NEW FINITE DIFFERENCE ALGORITHM
HEC- 1 INPUT
LINE ID. ...... 1.. ..... 2. ......3 .......4. ......5.......6... ....7.. .....8.......9......10
1 ID NORTH ELEMENTARY SCHOOL
2 ID 2 YEAR STORM STORMWATER DETENTI ON BASIN
3 ID POST DEVELOPMENT
4 IT 2 0 0 288
S 10 5 0 0
6 KK RUNOFF FROM AREA
7 PH 0 0 0.42 0.83 1.45 1.76 1.95 2.28
8 K14 0 0 0.59 1.27 2.38 2.93 3.24 3.76
9 KM 0 0 0.75 1.62 3.05 3.78 4.20 4.92
10 KM 0 0 0.83 1.78 3.34 4.12 4.56 5.34
11 BA 0.026
12 LS 0 79
PAGE 1
/o
13 UD 0.13
14 KK SPILLWAY ROUTING
15 KM 4.5" ORIFICE
16 KO 0
17 RS 1 ELEV
18 SV 0 0.42
19 SE 762 764
20 SQ 0 0.77
21 SE 762 764
22 ST 769 80
23 ZZ
•.a.aa...arerrrrraarra•aarraaa•re:aarr.ra
FLOOD HYDROGRAPH PACKAGE (HEC-1)
BY THE COE IN FEBRUARY 1981
REVISED 02 AUG 88
RUN DATE 04/18/1994 TIME 08:37:56 +
ra aaaa aaaaaraaaaaar•raaaaaaaraaaaaaraaaa
15" ORIFICE
762
0.95 1.59
766 768
1.12 1.38
766 768
3 1.5
aarrrarraraarerarraaarar••r•a•r aaraaaaa
' DODSON AND ASSOCIATES, INC.
` HYDROLOGIST AND CIVIL ENGINEERS
• 7015 W TIDWELL SUITE 107 +
' HOUSTON, TEXAS 77092 +
* [phone] +
a ?
rrraaaa??aaraaaaararra aaraa•aaaaa ra aaaa
NORTH ELEMENTARY SCHOOL
2 YEAR STORM STORMWATER DETENTION BASIN
POST DEVELOPMENT
5 IO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 2 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
ITIME 0000 STARTING TIME
NQ 288 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 1 0 ENDING DATE
NDTIME 0934 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .03 HOURS
TOTAL TIME BASE 9.57 HOURS
ENGLISH UNITS
DRAINAGE AREA
PRECIPITATION DEPTH
LENGTH, ELEVATION
FLOW
STORAGE VOLUME
SURFACE AREA
TEMPERATURE
SQUARE MILES
INCHES
FEET
CUBIC FEET PER SECOND
ACRE-FEET
ACRES
DEGREES FAHRENHEIT
. aaa ar• aaa aaa aaa aa? aaa ?aa ara ara ?sa aar raa aa? ?aa aaa •as aaa ?aa aaa aaa aaa aa? aaa raa aa? aaa aaa •aa •.? ars aaa

Rffffiif1111t?
14 KK SPILL • WAY ROUTING
lffif aff+flf tf
16 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
RUNOFF SUMMARY
FLOW IN CUBIC FEET PER SECOND
TIME IN HOURS, AREA IN SQUARE MILES
PEAK TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD BASIN MAXIMUM TIME OF
OPERATION STATION FLOW PEAK 6-HOUR 24-HOUR 72-HOUR AREA STAGE MAX STAGE
HYDROGRAPH AT RUNOFF 19. 3.20 2. 1. 1. .03
ROUTED TO SPILL 1. 5.67 1. 1. 1. .03 765.17 5.90
SUMMARY OF DAM OVERTOPPING/BREACH ANALYSIS FOR STATION SPILL
PLAN 1 ............... INITIAL VALUE SPILLWAY CREST TOP OF DAM
ELEVATION 762.00 769.00 769.00
STORAGE 0. 2. 2.
OUTFLOW 0. 2. 2.
RATIO MAXIMUM MAXIMUM MAXIMUM MAXIMUM DURATION TIME OF TIME OF
OF RESERVOIR DEPTH STORAGE OUTFLOW OVER TOP MAX OUTFLOW FAILURE
PMF W.S.ELEV OVER DAM AC-FT CPS HOURS HOURS HOURS
1.00 765.17 .00 1. 1. .00 5.90 .00
NORMAL END OF HEC-1 "••
fkfiitt if rffllf ?tfffllf1f+111fftfflffitf
FLOOD HYDROGRAPH PACKAGE (HEC-1) '
BY THE COE IN FEBRUARY 1981
REVISED 02 AUG 88 '
RUN DATE 04/18/1994 TIME 08:37:56 '
.rtrtt if rafet: rf af.iifttrflltfr+lfatft,
X X XXXXXXX XXXXX X
X X X X X XX
X X X X X
XXXXXXX XXXX X XXXXX X
X X X X X
•r+txxaftaaia+ixtfrrrf tfaraaf+lser+lrar
' DODSON AND ASSOCIATES, INC.
* HYDROLOGIST AND CIVIL ENGINEERS '
' 7015 W TIDWELL SUITE 107
" HOUSTON, TEXAS 77092 '
' [phone]
f f
x,tffrfaktaf+tfatt+ara+l+at+taxfataflri
W. K. DICKSON & COMPANY, INC.
CONSULTING ENGINEERS
WKD#: Notfl i ?w1???TkiL? COMPUTED BY: DATE:
DESCRIPTION: CHECKED BY. DATE:
SHEET ?Z OF
11
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?f ?? CD CG?LU ??T Zl ?j ?O (deu-
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16 l,ti Z?-? II4 IZ, q
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OUTFLOW 0.
2. 2.
RATIO MAXIMUM MAXIMUM MAXIMUM MAXIMUM DURATION TIME OF TIME OF
OF RESERVOIR DEPTH STORAGE OUTFLOW OVER TOP MAX OUTFLOW FAILURE
PMF W.S.ELEV OVER DAM AC-FT CFS HOURS HOURS HOURS
1.00 765.17 .00 1. 1. .00 5.90 .00
•• NORMAL END OF HEC-1 +••
•fYtf kffftfYfifYtYlifflttifYRRlff #iiffRR?
FLOOD HYDROGRAPH PACKAGE (HEC-1)
BY THE COE IN FEBRUARY 1981
REVISED 02 AUG 88
RUN DATE 04/18/1994 TIME 08:42:46 '
fffflffltf lflf#Rfft1f 1f 1f lYf?tffYfYYf ff?
X X XXXXXXX XXXXX X
X X X X X XX
X X X X X
XXXXXXX XXXX X XXXXX X
X X X X X
X X X X X X
X X XXXXXXX XXXXX XXX
ffetf?f#tYltYtk##RR4YtfYYff####YklftYff
t #
' DODSON AND ASSOCIATES, INC. +
' HYDROLOGIST AND CIVIL ENGINEERS +
+ 7015 W TIDWELL SUITE 107 +
` HOUSTON, TEXAS 77092 +
+ [phone] '
#
?Yff#tif##1f tkltY#lf tfiflftiff##ftlt##f
THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW
THE DEFINITIONS OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE.
THE DEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTRAN77 VERSION
NEW OPTIONS: DAMBREAK OUTFLOW SUBMERGENCE , SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY,
DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND AMPT INFILTRATION
KINEMATIC WAVE: NEW FINITE DIFFERENCE ALGORITHM
HEC-1 INPUT PAGE 1
LINE ID. ...... 1.. ..... 2. ......3.......4.......5.......6.. .....7.......8.......9......10
1 NORTH ELEMENTARY SCHOOL
2 ID 10 YEAR STORM STORMWATER DETENTION BASIN
3 ID POST DEVELOPMENT
4 IT 2 0 0 288
5 IO 5 0 0
6 KK RUNOFF FROM AREA
7 KM 0 0 0.42 0.83 1.45 1.76 1.95 2.28
8 PH 0 0 0.59 1.27 2.38 2.93 3.24 3.76
/4-
9 KM 0 0 0.75 1.62 3.05 3.78 4.20 4.92
10 KM 0 0 0.83 1.78 3.34 4.12 4.56 5.34
11 BA 0.026
12 LS 0 79
13 UD 0.13
14 KK SPILLWAY ROUTING
15 KM 4.5" ORIFICE 15" ORIFICE
16 KO 0
17 RS 1 ELEV 762
18 SV 0 0.42 0.95 1.59
19 SE 762 764 766 768
20 SQ 0 0.5 0.8 1.0
21 SE 762 763 764 765
22 ST 769 80 3 1.5
23 ZZ
.ff lffrwwww?if rf tffffff+ffllwiffllwfwffff
FLOOD HYDROGRAPH PACKAGE (HEC-1)
BY THE COE IN FEBRUARY 1981
REVISED 02 AUG 88
RUN DATE 04/18/1994 TIME 08:42:46
.ffefrwwwf slrlr wff.f srwwfff if wefflfrwff
3.7 8.2 10.8 12.9
766 767 768 769
fflff if?Yifffflriwwwwiffflfff?itfffwf of
• DODSON AND ASSOCIATES, INC. '
' HYDROLOGIST AND CIVIL ENGINEERS
' 7015 W TIDWELL SUITE 107 +
' HOUSTON, TEXAS 77092 '
' [phone]
• f
?wlf rffffltw wf lffif ?f lff lff if lffffff?rf
• HEC-1 ERROR 1 •+• INVALID CARD IDENTIFICATION CODE OR CARD OUT OF SEQUENCE
CARD NO. 1 NORTH ELEMENTARY SCHOOL
10 YEAR STORM STORMWATER DETENTION BASIN
POST DEVELOPMENT
5 IO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 2 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
ITIME 0000 STARTING TIME
NQ 288 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 1 0 ENDING DATE
NDTIME 0934 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .03 HOURS
TOTAL TIME BASE 9.57 HOURS
ENGLISH UNITS
DRAINAGE AREA SQUARE MILES
PRECIPITATION DEPTH INCHES
LENGTH, ELEVATION FEET
FLOW CUBIC FEET PER SECOND
STORAGE VOLUME ACRE-FEET
SURFACE AREA ACRES
/L
f
TEMPERATURE DEGREES FAHRENHEIT
1f Rf• •RR iff fff f•f If4 f1? t1R fff fff •ff ?fR fff ?1f fRf f?L Rkf faR k4# fYR ?f? 1f4 R1R fff ?•f aaf fff Oaf 1fY Ywf 1fa f1R
1 1 R R 1 R f f 1 1 1 f f
f
14 KK SPILL + WAY ROUTING
R
?fiR4fwrf Yflw?
16 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
RUNOFF SUMMARY
FLOW IN CUBIC FEET PER SECOND
TIME IN HOURS, AREA IN SQUARE MILES
PEAK TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD BASIN
OPERATION STATION FLOW PEAK 6-HOUR 24-HOUR 72-HOUR AREA
HYDROGRAPH AT RUNOFF 47. 3.17 5. 3. 3. .03
ROUTED TO SPILL 9. 3.73 4. 2. 2. .03
SUMMARY OF DAM OVERTOPPING/BREACH ANALYSIS FOR STATION SPILL
PLAN 1 ............... INITIAL VALUE SPILLWAY CREST TOP OF DAM
ELEVATION 762.00 769.00 769.00
STORAGE 0. 2. 2.
OUTFLOW 0. 13. 13.
MAXIMUM TIME OF
STAGE MAX STAGE
767.42 3.73
RATIO MAXIMUM MAXIMUM MAXIMUM MAXIMUM DURATION TIME OF TIME OF
OF RESERVOIR DEPTH STORAGE OUTFLOW OVER TOP MAX OUTFLOW FAILURE
PMF W.S.ELEV OVER DAM AC-FT CPS HOURS HOURS HOURS
1.00 767.42 .00 1. 9. .00 3.73 .00
•• 1 ERROR(S) DETECTED BY HEC-1 •••
•ff#af4??ff4iaflR?1klflff•1•ffffiff?f if ff
FLOOD HYDROGRAPH PACKAGE (HEC-1)
BY THE COE IN FEBRUARY 1981
REVISED 02 AUG 86
RUN DATE 04/18/1994 TIME 08:42:46
••ff•fwffaaff?ff•ff:ffYf••ff•??#4fff•••
wr111rr1wf?1r4f#f4+fikffrfrr tf ifffrf lrr
' DODSON AND ASSOCIATES, INC. +
• HYDROLOGIST AND CIVIL ENGINEERS
• 7015 W TIDWELL SUITE 107 +
• HOUSTON, TEXAS 77092 '
' [phone] +
? ?
14aaff1rlrffff1R114aYrR wrfarffaaf aaYYYr
W. K. DICKSON & COMPANY, INC.
CONSULTING ENGINEERS
WKD#: Nolml1 CI Pt rt c?/ COMPUTED BY. DATE:
DESCRIPTION: CHECKED BY: DATE:
SHEET OF
?I 3 f X 3 I 5? v[+ocG t? hit Gtz?1r ?' 1 ? 7 ? _
3?L ?L
e, eo x(03.25
6? o ;-?<gs CZ ?? Q wGi2- Q
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ab?T = ?1 r,V-e, AT 5Lej
ov ?•
--

RUN DATE 04/18/1994 TIME 08:49:28 '
..••rr•••a•a•••rr••a•••aa•w••••••ra•••r•
X X XXXXXXX XXXXX X
X X X X X XX
X X X X X
XXXXXXX XXXX X XXXXX X
X X X X X
X X X X X X
X X XXXXXXX XXXXX XXX
' HOUSTON, TEXAS 77092 +
• [phone]
•w••awta•w •w+aae•wraa ••w•ra•a•••wrwar•r
THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW
THE DEFINITIONS OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE.
THE DEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTRAN77 VERSION
NEW OPTIONS: DAMBREAK OUTFLOW SUBMERGENCE , SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY,
DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND AMPT INFILTRATION
KINEMATIC WAVE: NEW FINITE DIFFERENCE ALGORITHM
HEC-1 INPUT
LINE ID....... 1....... 2....... 3....... 4....... 5....... 6....... 7....... 8....... 9...... 10
1 NORTH ELEMENTARY SCHOOL
2 ID 50 YEAR STORM STORMWATER DETENTION BASIN
3 ID POST DEVELOPMENT
4 IT 2 0 0 288
5 IO 5 0 0
6 KK RUNOFF FROM AREA
7 KM 0 0 0.42 0.83 1.45 1.76 1.95 2. 28
8 KM 0 0 0.59 1.27 2.38 2.93 3.24 3. 76
9 PH 0 0 0.75 1.62 3.05 3.78 4.20 4. 92
10 KM 0 0 0.83 1.78 3.34 4.12 4.56 5. 34
11 BA 0.026
12 LS 0 79
13 UD 0.13
14 KK SPILLWAY ROUTING
15 KM 4.5" ORIFICE 15" ORIFICE 3"X3"BOX 3 0"RCP
16 KO 0
17 RS 1 ELEV 762
18 SV 0 0.42 0.95 1.59
19 SE 762 764 766 768
20 SQ 0 0.5 0.8 1.0 3.7 8.2 23.5 74 .3
21 SE 762 763 764 765 766 767 768 7 69
22 ST 769 80 3 1.5
23 ZZ
PAGE 1
IB
FLOOD HYDROGRAPH PACKAGE (HEC-1)
BY THE COE IN FEBRUARY 1981
REVISED 02 AUG 88
RUN DATE 04/18/1994 TIME 08:49:28
feat aeeaa•a?ff•af fffaaf affff•:aaf ••f•ffa
' DODSON AND ASSOCIATES, INC.
' HYDROLOGIST AND CIVIL ENGINEERS
' 7015 W TIDWELL SUITE 107
' HOUSTON, TEXAS 77092
• [phone]
raraaaffraaff•raaffaffarrfaaaaf rarrfff?
•• HEC-1 ERROR 1 ••• INVALID CARD IDENTIFICATION CODE OR CARD OUT OF SEQUENCE
CARD NO. 1 NORTH ELEMENTARY SCHOOL
50 YEAR STORM STORMWATER DETENTION BASIN
POST DEVELOPMENT
5 IO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 2 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
ITIME 0000 STARTING TIME
NQ 288 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 1 0 ENDING DATE
NDTIME 0934 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .03 HOURS
TOTAL TIME BASE 9.57 HOURS
ENGLISH UNITS
DRAINAGE AREA
PRECIPITATION DEPTH
LENGTH, ELEVATION
FLOW
STORAGE VOLUME
SURFACE AREA
TEMPERATURE
SQUARE MILES
INCHES
FEET
CUBIC FEET PER SECOND
ACRE-FEET
ACRES
DEGREES FAHRENHEIT
rlffaf afffffr?
14 KK * SPILL ' WAY ROUTING
aff•a raa•aaaaa
:6 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
W. K. DICKSON & COMPANY, INC.
CONSULTING ENGINEERS
WKD#: IV AAA IY VV4k f6V - 4 ? COMPUTED BY FZP'L
DATE:
DESCRIPTION: fit{ CHECKED BY: DATE:
SHEET OF

RUNOFF SUMMARY
FLOW IN CUBIC FEET PER SECOND
TIME IN HOURS, AREA IN SQUARE MILES
PEAK TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD BASIN MAXIMUM TIME OF
OPERATION STATION FLOW PEAK 6-HOUR 24-HOUR 72-HOUR AREA STAGE MAX STAGE
HYDROGRAPH AT RUNOFF 71. 3.17 S. 5. 5. .03
ROUTED TO SPILL 37. 3.40 6. 4. 4. .03 768.26 3.40
SUMMARY OF DAM OVERTOPPING/BREACH ANALYSIS FOR STATION SPILL
PLAN 1 ............... INITIAL VALUE SPILLWAY CREST TOP OF DAM
ELEVATION 762.00 769.00 769.00
STORAGE 0. 2. 2.
OUTFLOW 0. 74. 74.
RATIO MAXIMUM MAXIMUM MAXIMUM MAXIMUM DURATION TIME OF TIME OF
OF RESERVOIR DEPTH STORAGE OUTFLOW OVER TOP MAX OUTFLOW FAILURE
PMF W.S.ELEV OVER DAM AC-FT CFS HOURS HOURS HOURS
1.00 768.26 .00 2. 37. .00 3.40 .00
" 1 ERROR(S) DETECTED BY HEC-1 •+.
1,
W. K. DICKSON & COMPANY, INC.
CONSULTING ENGINEERS
WKD#: Nzw IY U?Al L6w *0Ti?O?'( COMPUTED BY. V7'? DATE: IZ '?
DESCRIPTION: tlt Po& CHECKED BY. DATE:
SHEET OF
?tOtrit..
c Wit "W
175. Zoe `. - 4G!so
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