J- -14-03 STORMWATER MANAGEMENT REPORT-ANNAPOLIS
Updated
A PDF document (14.7 MB) attached to Base Operations Support Services For NSA Annapolis and US Naval Academy, Annapolis, Maryland, from the Department of the Navy.
File name: J-1604000-14-03 STORMWATER MANAGEMENT REPORT-ANNAPOLIS JANUARY 2017.pdf
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ATTACHMENT 1604000-14-03
STORMWATER MANAGEMENT REPORT-ANNAPOLIS JANUARY 2017
BMP ID#:
SWM-43
Name:
NEX Micro-Bioretention DA1-P
Type:
Micro-Bioretention
Location:
693 Kinkaid Road (Lat. 38.994613, Long. -76.467909)
TOPIC
General
Information
DETAIL
Year Installed
Drainage Area
Impervious Area
Total Area Treated
Treated Storm/Rainfall
Proposed Flow
Pollutants Treated
~2014
0.88 acres
0.20 acres (master spreadsheet)
0.26 acres (master spreadsheet)
Unknown
Unknown
Total Phosphorus, Metals, TKN, Total Suspended Solids,
Organics, Bacteria, Trash/Debris
Shape
Length, Width, Depth
Slope(s)
Capacity (Water Quality Volume)
Long oval shaped micro-bioretention
Micro-Bioretention: 132’ x 8’ x 4’
Pea gravel with side slopes 3:1
Unknown
No inflow pipe. Three (3) curb drainage outlets comprised of a riprap channel inlet to micro-bioretention (Class I d50=9.5”) 8’ wide, varying lengths. See details below.
NA, no forebay
NA, no forebay
Level spreader for overflow into bioretention basin
(SWM-54) – see detail below. 3:1 Slope to Bioretention
3” mulch layer, followed by 2.5’ of planting soil, 4” of pea gravel, and 18” of stone (#57) with a 4” perforated PVC underdrain system, over 12” of disked soil. Non-woven
geotextile on all sides
2” observation well connected to underdrain system, 6”
above mulch layer, located at northernmost end
Two (2) 8” ductile iron pipes at a 45’ angle. Clean outs located at both ends of underdrain system
Tussock sedge (Carex stricta), wild strawberry (Fragaria virginiana), daylily (Hemerocallis dumortieri), blue flags iris (Iris versicolor), soft rush (Juncus effuses), wild blue phlox (Phlox diviricata), stone crop (Sedum spurium
varieties)
4” diameter perforated 40 PVC or SDR 35, 3/8” @ 6” on
center (128 ft long), 4 holes per row, min. of 3” of gravel over pipe. Pipes placed inside gravel bedding at a min
slope of 0.5%
Underdrain outlet - 4” perforated PVC pipe underdrain
connects to 4” PVC which discharges to bioretention
SWM-54. Overflow goes over spill way to bioretention
SWM-54
Inflow Pipe Length/Diameter
Forebay Volume
Forebay Media Type/Thickness
Spillway
Bioretention Media Type/Thickness
Design Details
INFORMATION
Wellcap / Observation Well
Cleanout Details
Vegetative Cover Type / Landscaping
Underdrain Details
Outflow Pipe Length/Diameter
Bioretention, Micro-Bioretention, and Rain Gardens
BMP ID#:
SWM-43
Name:
NEX Micro-Bioretention DA1-P
Type:
Micro-Bioretention
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