ATTACHMENT E - UPDATED_CA7-1785959-CG105.pdf
PDF 718 KB Posted
- Attached to
- NSA, CA-7 Secure Room and Restroom Addition
- Solicitation number
- N4008526R0232
About this file
This is a Naval Facilities Engineering Systems Command (NAVFAC) construction drawing for a grading and drainage plan. The drawing covers Building CA-7 Secure Room and Restroom Addition at Naval Station Norfolk, Norfolk, Virginia. The project is identified as OPTEVFOR with a NAVFAC Drawing Number CG105 and Project Number 1785959, with a revision date of 14 September 2023.
The grading and drainage plan details stormwater management infrastructure including two new manholes (MH-1 and MH-2), four new drop inlets (DI-1 through DI-4), and two new underdrain cleanouts (CO-1 and CO-2) with specified rim elevations and invert elevations. The plan incorporates dry swales for stormwater management and requires semi-annual inspection by the contractor during the first year of operation, with particular attention to spring maintenance activities including sediment removal, spot re-vegetation, and inlet stabilization. Subsequent inspections shall be adjusted based on observed sediment deposition. Maintenance inspection checklists must comply with Appendix C of Chapter 9 of the Virginia Stormwater Management Handbook (2010). Design professionals include S. Gilpin, R.A., and J. Miller, P.E., with approval by DAS & DMH.
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OPTEVFOR
5/28/26
S. GILPIN, R.A.
J. MILLER, P.E.
DAS & DMH
1785959
N/A
CG105
GENERAL SHEET NOTES
GRAPHIC SCALEGRAPHIC SCALE
N
GRADING AND DRAINAGE PLAN
KEYPLAN
KEYNOTES
1. NOT USED.
2. NOT USED.
3. NOT USED.
4. NOT USED.
5. NOT USED.
6. NOT USED.
7. NOT USED.
8. NOT USED.
9. NOT USED.
10. NOT USED.
11. NOT USED.
12. NOT USED.
PIPE AND STRUCTURE SCHEDULE
MH-1 NEW MANHOLE
RIM= 8.16'
INV IN= 3.68' (SE)
INV IN= 3.61 (NE)
INV OUT= 3.60 (NW)
MH-2 EXISTING MANHOLE
RIM= 7.52'
INV IN= 3.48' (NE)
INV OUT= 3.35' (N)
CO-1 NEW UNDERDRAIN
CLEANOUT
INV= 4.35'
DI-1 NEW DROP INLET (IN
EXISTING DROP INLET
LOCATION)
RIM=7.10'
INV IN= 3.35' (NE)
INV OUT=3.36' (NW)
EXISTING DROP INLET
RIM= 6.96'
INV= 3.86'(NW)
CO-2 NEW UNDERDRAIN
CLEANOUT
INV= 4.10'
DI-2
DI-3 NEW DROP INLET
RIM= 6.5'
INV IN= 3.83' (SE)
INV OUT= 3.82' (NE)
DI-4 NEW DROP INLET
RIM= 6.5'
INV IN= 3.90' (NE)
INV OUT= 3.89' (SE)
A. WHERE PROPOSED GRADES ARE NOT SHOWN, MATCH EXISTING GRADES.
B. THE DRY SWALES SHALL BE INSPECTED EVERY SIX MONTHS FOR THE FIRST
YEAR OF OPERATION BY THE CONTRACTOR, ESPECIALLY IN THE SPRING
TRIGGERING SUCH MAINTENANCE ACTIVITIES AS SEDIMENT REMOVAL, SPOT
RE-VEGETATION, INLET STABILIZATION, UNDERDRAINS AND OUTLETS. FOR
SUBSEQUENT YEARS, THE INSPECTION SHALL BE ADJUSTED BASED UPON
PREVIOUS OBSERVATION OF SEDIMENT DEPOSITION IN THE SYSTEM BY THE
ACTIVITY.
C. MAINTENANCE INSPECTION CHECKLISTS FOR THE DRY SWALES MUST BE IN
ACCORDANCE TO APPENDIX C OF CHAPTER 9 OF VIRGINIA STORMWATER
MANAGEMENT HANDBOOK (2010).
AutoCAD SHX Text M
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CA7
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GV
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GV
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CONC S/W
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GRASS
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MULCH
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GRAVEL
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GRASS
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ASPHALT
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DIVEN STREET
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DOWNSPOUT
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TREE
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AG PIPE
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MECH. EQUIP.
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LIMITS OF WORK
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LIMITS OF WORK
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LIMITS OF WORK
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LIMITS OF WORK
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SW
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GRADING AND DRAINAGE PLAN
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AS NOTED
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W. WITHAM, P.E.
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MATCH LINE - SHEET CG106
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AutoCAD SHX Text 0'
AutoCAD SHX Text 1"=10'
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MATCH LINE - SHEET CG107
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MATCH LINE - SHEET CS103
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SCALE: 1" = 10'-0"
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CG101
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CG102
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CG103
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CG104
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CG105
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CG106
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CG107
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CG108
virginia.perry Text Box
MAC CONTRACT
| Sheets and Views |
| CG105 |
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