Amendment A00003 Sheet C-09-Revised 04MAR21.pdf
PDF 330 KB Posted
- Attached to
- W912DR21B0007 | Third High Reservoir Federal contract opportunity
- Solicitation number
- W912DR21B0007
About this file
This document is an amendment to construction drawings for improvements to the Third High Reservoir. It provides details for the installation of a 24-inch drain pipe with an air gap profile including pipe dimensions and materials, slope percentages, invert elevations, manholes, valves, and connections to existing infrastructure. The related federal contract opportunity is solicited by the Department of the Army Corps of Engineers Engineering District Baltimore for maintenance and improvements to the Third High Reservoir under solicitation number W912DR21B0007.
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Text version
EXISTING GRADE
EXISTING STORM
MANHOLE
3.67'x3.67'
RECEIVING
STRUCTURE
11+78.5
ELEV:378.4
10+02.5
ELEV:387.0
24" DIP
OVERFLOW
REGRADE AREA ONE (1)
FOOT ABOVE EXISTING
GRADE TO MATCH GRADE
TO TOP OF NEW MANHOLE
11+81.2
ELEV:386.3
CONCRETE THRUST
BLOCK, SEE DETAIL 4
ON SHEET C-13
20' RESTRAINED JOINT
24" DIA FLAP
GATE
24" 45° DI ELBOW MJ
WITH RESTRAINED
JOINTS
' O
F
.7
O
F
11+47.2
ELEV:378.7
OVERFLOW PIPE END SEE
DETAIL 5, SHEET C-13
RESTRAINED JOINT
(ALL PIPE LENGTH)
EXISTING 24" CI DRAIN PIPE
(INVERT TO FIELD VERIFY)
PROPOSED PRESSURIZED MANHOLE,
SEE DETAIL 1 SHEET C-11
CONNECT TO EXISTING MANHOLE
SEE DETAIL 6, SHEET C-13
ELEV:379.4
ELEV:378.4
PROPOSED AIR GAP
CHAMBER, SEE DETAIL 1
SHEET C-12
PROPOSED GRADE
PROPOSED 24"
DRAIN PIPE
PROPOSED 24"
DIP DRAIN PIPE
EXISTING 24"
STORM DRAIN
EXISTING 24"
BLOW-OFF DRAIN
EXISTING STORM
MANHOLE
24" 45° DI ELBOW
MJ (TYP F 2)
24" DIA FLAT
GATE
EXISTING STORM
MANHOLE
SEE DETAIL 5 ON
SHEET C-13
PROPOSED PRESSURIZED MH
STA: 10+00
RIM: 406
PROP 24" (W) INV=387
STR BOTTOM: 385
N: 468155.4
E: 1289854.8
TRUST BLOCK, SEE
SHEET C-13 DETAIL 4
SEE SHEET C-11
PERMANENT PLUG
TEMPORARY PLUG
UNTIL AIR-GAP IS
OPERATIONAL
DAVENPORT ST NW
B
E
L
T
R
D
N
W
APPROXIMATE LOCATION
OF EXISTING ELBOWS
TRAP (SEE NOTE 1)
PROPOSED AIR-GAP
STRUCTURE (SEE
SHEET C-12, DETAIL 1)
N: 468161.7
E: 1289671.2
N: 468161.6
E: 1289681.5
N: 468151.3
E: 1289681.4
N: 468151.3
E: 1289671.1
EXISTING LIGHT
POLE TO REMAIN
EXISTING STORM
MANHOLE
SEE STAIR PLAN
DETAIL 7, SHEET C-13
DRAWING NUMBER PLATE
SCALE:
DATE: SHEET:
WASHINGTON AQUEDUCT
THIRD HIGH RESERVOIR, WASHINGTON, DC
MAINTENANCE AND IMPROVEMENTS
NOVEMBER 2019
THIRD HIGH RESERVOIR
Nova Consulting
U.S. ARMY ENGINEER DISTRICT, BALTIMORE
CORPS OF ENGINEERS
BALTIMORE, MARYLAND
HAROLD V. AIKEN, PE
AS SHOWN
80.3-5.12 12
C-09
24" DRAIN W/ AIR-GAP PROFILE
SCALE: 1"=10'-0"
0 10 20
24" DRAIN PIPE (ENLARGED PLAN)
KEY PLAN
GENERAL SHEET NOTES
1. APPROXIMATE LOCATION OF TRAP IS PROVIDED BASED ON AS-BUILT PROVIDED
TO THE ENGINEER AND HAS NOT BEEN VERIFIED IN THE FIELD. IF DURING
CONSTRUCTION THE CONTRACTOR FIND THERE IS A CONFLICT BETWEEN THE
EXISTING TRAP AND THE NEW STRUCTURE, THE CONTRACTOR SHALL NOTIFY
THE ENGINEER IMMEDIATELY.
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DATE
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DESCRIPTION
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BY
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A/E PRINCIPAL
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SEAL:
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APPROVED:
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CIVIL
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24 INCH DRAIN PIPE PLAN AND PROFILE
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HORIZ SCALE : 1"=10'
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VERT SCALE : 1"=5'
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HORIZ SCALE : 1"=10'
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ADDENDA #1
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HVA
| Sheets and Views |
| C-09 |
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