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0 50QO beet A fr '.'f e�z j"" Andover/North Andover, Massachusetts
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Athletics District Improvements
Merrimack College 3/4/2017
0 50 100 Feet Andover/North Andover, Massachusetts
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Closed-Drainage System Hydraulic Analysis
Proposed Conditions: Merrimack Athletic District Improvements,Andover/North Andover, MA
25-Year Storm Event
Upstream Inlet Upstream System CA Conc Time Intensity Pipe Size Manning's Slope Length Capacity(Full Flow Velocity Rim Hydraulic Rim Hydraulic Invert Invert
Start Node Stop Node ( } ) (min) (in/h) (in) Material n (ft/ft )( } [(Design) g ) (..Upper) f ) (Upper) ( )
Area acres Inlet C (acres min ) (ft) Flaw cfs (Average) Grade Lower GradeLower
DMH-109 DMH-111 (NIA) (N/A) 0.144 0 7.706 12 HDPE 0.011 0.009 26.4 - �4.09 1.12 4.44 242.8 237 242,65 236.66 236.55 �- 236.3
TD-C DMH-109 0.16 0,9 0.144 5 7.912 12 HDPE 0.011 0.011 127 4.42 1,15 4.73 242.5 239.75 242.8 238.25 239.3 237,9
DMH-111 DMH-108 2.36 0.87 2.197 5 7.661 30 HDPE 0,011 0.005 324,4 35,09 22.81 7.61 242.65 233.23 236.6 232,67 231.6 229,9
DMH-110 DMH-111 (N/A) (N/A) 0 0 7.931 15 HDPE 0.011 0.011 18,6 7.92 5.84 7.05 242.55 233.58 242.65 233.61 232.6 232.4
TURF 10-N" DMH-110 (N/A) (N/A) 0 0 7.931 15 HDPE 0.011 0.01 43.8 7.65 5.84 6.87 236.7 234.22 242.55 233.85 233.24 232.8
AD-101 CO-102 0.18 0.2 0,036 5 7.912 12 HDPE 0,011 0.005 74.6 3.08 0.29 2.46 236.5 234.22 237.53 233.85. 234 233.6
CO-102 CO-103 (N/A) (N/A) 0.036 0 7.68 12 HDPE 0.011 0.006 70 3.18 0.28 2,49 237.53 233.82 237.13 233,44 233.6 233.2
CO-103 AD-104 (N/A) (N/A) 0.036 0 7.464 12 HDPE 0,011 0.006 81 3.31 0.27 2.54 237.13 233.41 236.5 233.21 233.2 232.7
CO-113 DMH-119 0.09 0.9 0.081 5 7.912 8 HDPE 0,011 0.01 252.7 1.41 0.65 3.94 236.9 234.28 236 232.31 233.9 231.45
AD-116 DMH-119 0.03 0.9 0.237 5 7.716 12 HDPE 0,011 0.009 122.7 3.98 1.84 4.98 236.5 233.38 236.8 232.18 232.8 231,7
DMH-119 WQU-121 (N/A) (N/A) 0.525 0 7,188 18 HDPE 0.011 0.009 57.2 11.61 3.8 5.88 236.8 232.01 236.4 231.98 230.8 230.3
DMH-118 DMH-119 (NIA) (N/A) 0.081 0 7,421 8 HDPE 0,011 0.01 52.8 1.46 0.61 1.74 236 232.27 236.8 232.18 231.45 230.9
AD-117 DMH-119 0,12 0.9 0.108 5 7,912 8 HDPE 0.011 0.015 33.6 1.74 0.86 4.98 236.5 233.94 236.8 233,33 233.5 233
AD-120 DMH-119 0.11 0.9 0.099 5 7.912 8 HDPE 0,011 Q,014 36.3 1,68 0.79 4.73 236.5 233,92 236,8 233,32 233.5 233
TURF 10-S" DMH-112 (N/A) (N/A) 0 0 7.931 15 HDPE 0.011 0.011 52.7 7.87 5.84 7.02 236.7 233.94 236.8 233.47 232.96 232.4
DMH-112 DMH-108 (N/A) (N/A) 0 0 7.931 15 HDPE 0,011 0.017 11.7 10 5.84 8.46 236.9 233.18 236.6 232.8 232.2 232
DMH-107 DMH-108 (N/A) (N/A) 0.617 0 5,626 18 HDPE 0.011 0.008 60.7 11.27 3,5 1.98 236.43 232.72 236.6 232.67 230.4 229.9
DMH-108 DMH-122 (N/A) (N/A) 2,814 0 5.499 30 HDPE 0.011 0.004 70.4 28.88 27.28 6,69 236.6 232.08 235.1 231.91 229.8 229.55
AD-104 AD-105 0.07 0.2 0.05 5 7.219 12 HDPE 0.011 0,005 56.3 3.07 0.36 2.63 236.5 233.21 236.5 233.21 232.7 232.4
AD-114 AD-115 0.32 0.6 0.192 5 7.912 12 HDPE 0.011 0,008 65.6 3.68 1.53 4.46 236.5 234.32 236.5 233.92 233.8 233.3
AD-115 AD-116 0.02 0.9 0.21 5 7.8 12 HDPE 0.011 0.009 53.4 4.07 1.65 4.91 236.5 233.85 236.5 233.45 233.3 232.8
AD-105 DMH-106 0.11 0,41 0.095 5 7,055 12 HDPE 0.011 0.006 152.9 3,23 0.68 3.25 236.5 233.2 236.43 233.17 232,4 231.5
DMH-106 DMH-107 (N/A) (N/A) 0.347 0 6.694 18 HDPE 0.011 0.006 184.5 9.59 2.34 1.33 236.43 233.06 236.43 232.99 231.5 230.4
TD-B DMH-107 0.3 0.9 0.27 5 7,912 12 HDPE 0.011 0.013 52 4.89 2.15 6.03 236.25 233.83 236.43 232.97 233.2 232.5
TD-A DMH-106 0.28 0.9 0.252 5 7.912 12 HDPE 0.011 0.013 52 4.89 2.01 5.91 236.25 233.81 236.43 233.17 233.2 232.5
WQU-121 DMH-122 (N/A) (N/A) 0.525 0 7.113 18 HDPE 0.011 0.008 53.9 11.35 3.76 2.13 236.4 231.96 235.1 231.91 230 229.55
DMH-122 DMH-125 (N/A) (N/A) 3.457 0 5.457 30 HDPE 0.011 0,004 121.5 29.5 30.7 6.82 235.1 231.7 235.15 231.25 229,55 229.1
SCB-124 DMH-125 0.12 0.7 0.084 5 7.912 12 HDPE 0.011 0.01 10.3 4.15 0.67 3.88 233.2 231.25 235.15 231.25 230.6 230.5
CB-123 DMH-122. 0.59 0.2 0.118 5 7.912 12 HDPE 0.011 0.009 10.7 4.06 0.94 1.2 233 231.91 235.1 231.91 230 229.9
DMH-125 DP (N/A) (N/A) 3.541 0 5.385 30 0.013 0.008 179 37.55 30.9 8.54 235.15 230.99 230 229.33 229.1 227.6
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Draniny Title,
TRACK & FIELD
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1, Test Borings and Auger Probes were performed on March 17 & 18,2016 under the direction of JTC. Exploration locations should be considered approximate.
2. Refer to the Test Boring Logs and Summary of Auger Probes for the subsurface conditions encountered at each exploration location.
3, Basemap source(s); April 7,2016"Grading and Drainage Plan"prepared by Huntress Associates Inc.
4. Not to Scale.
Merrimack College Proposed Track & Field
315 Turnpike Street Merrimack College
North Andover, Massachusetts 01810 North Andover, Massachusetts
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PROPOSED TEST PIT (TP) LOCATIONS SHOWN ARE APPROXIMATE, TP-5 RELOCATED TO AVOID IMPACT TO PROPOSED BUILDING BORING LOCATION (PER CHANNEL) Athletics �
District Project
QA 0 30 60 Feet SOFTBALL FIELD AND SUPPLEMENT INFORMATION FOR Merrimack College 2/10/2017
FIELDHOUSE BUILDING. TP-4 WAS NOT PERFORMED, PROPOSED LIGHT POLE BORING LOCATION (PER HAI) North Andover, MA 3/3/2017 - R3
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Merrimack College - Athletics District Improvements, Andover/North Andover, Massachusetts
Long Term Best Management Practices - Maintenance/ Evaluation Checklist
(Vote: Annual reports of this maintenance%valuation shall be submitted to the Town of Andover Planning Division.
Best Date Cleaning/Repair Needed Date of
Management Inspection Frequency Inspected Inspector Minimum Maintenance and Key Items to Check ❑yes no {List Items) Cleaning/Repair
Performed by
Practice
In accordance with + Remove sediment from sediment storage facility (per manufacturer's ❑yes [:]no
Structural Water manufacturer's recommendations guidelines)
Quality Devices but no less than twice a year • Remove oil and floatables in the oil/inspection port(per manufacturer's
following installation and no less guidelines)
than once a year thereafter.
Deep Sump and
Hooded Catch basins, Four times per year Clean accumulated sand and sediment whenever the depth of deposits is ❑yeg Ono
Area Drains and greater than or equal to one half the depth from the bottom of the invert
Trench Drains for of the lowest pipe in the basin;
plazas and synthetic • Floatables
field drainage system.
Roof Drain Leaders 4x per year Remove roof debris, clean inlets ❑yes ❑no
Stormwater Control Manager
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Athletics District Improvements
Merrimack College April 6, 2017
0 40 80 Feet North Andover, Massachusetts
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