May 22, 2014 Mr. Andrew B. DeSantis, Chair

Transcription

Sullivan Engineering Group, LLC
Civil Engineers & Land Development Consultants
DRAINAGE REPORT
April 25, 2014
Owner:
770-778 Washington Avenue, LLC
1306 Lewis O. Gray Drive
Saugus, MA 01906
Applicant:
Dana Lopez
Wakefield Associates, Inc.
554 Salem Street
Wakefield, MA 01880
Project Address: 770-778 Washington Avenue, Revere, MA
Engineer:
John D. Sullivan III, PE
22 Mount Vernon Road
Boxford, MA 01921
978-352-7871
Items Included in Report:
1) Completed Checklist for Stormwater Report (Stamped & Signed)
2) Long-Term Pollution Prevention Plan (LTPPP)
3) Stormwater Prevention Pollution Plan (SWPPP)
4) Operation and Maintenance Plan
5) TSS Removal Worksheet
6) HydroCAD analysis detailing drain pipe sizing
Drainage Summary:
This site falls within a coastal floodplain and consists of urban fill, therefore efforts have been made to
improve water quality. The entire roof area of the proposed building will be collected via roof drains and
conveyed to an existing 6 inch clay drain which discharges to the Town Line Brook Canal. The proposed
pavement areas will sheet flow to deep sump catchbasins with gas hoods then flow through 12” drain lines via
drain manholes to a stormceptor. The stormceptor unit selected will function in submerged conditions. The
stormceptor will discharge to the existing 36” RCP Drain line in Washington Avenue.
________________________________________________________________________________________
Sullivan Engineering Group, LLC ● 22 Mount Vernon Road ● Boxford, Massachusetts 01921 ● (978) 352-7871
LONG-TERM POLLUTION PREVENTION PLAN
for
770-778 Washington Avenue
in
Revere, Massachusetts
April 25, 2014
Prepared For:
Wakefield Associates, Inc.
554 Salem Street
Wakefield, MA 01880
LTPPP Coordinator
The construction site LTPPP coordinator for the facility is Wakefield Associates, Inc. – c/o Dana Lopez
(phone number: (781)844-8282). The mailing address for Mr. Lopez is:
544 Salem Street, Wakefield, MA 01880.
LTPPP Content
This LTPPP includes the following:
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Good Housekeeping Practices
Provisions for storing materials and waste products inside or under cover
Vehicle Washing Controls
Requirements for routine inspections and maintenance of stormwater BMP’s
Spill Prevention and response plans
Provisions for maintenance of lawns, gardens, and other landscaped areas
Requirements for storage and use of fertilizers, herbicides, and pesticides
Provisions for Solid Waste management
Snow disposal and plowing plans relative to Wetland Resource Areas
Winter Road Salt and/or Sand Use and Storage restrictions
Street Sweeping schedules
Provisions for prevention of illicit discharges to the stormwater management system
Training for staff or personnel involved with implementing the LTPPP
List of Emergency Contacts
Good Housekeeping Practices
Activity
Best Management Practices
Pavement Sweeping
Roadway sweeping is required periodically (see Street
Sweeping schedule). Dispose of debris in the garbage
Litter Control
Pick-up litter and other wastes periodically from outside
areas including storm drain inlet grates and wetland resource
areas.
Waste Disposal
* Inspect dumpsters and other waste containers periodically.
* Repair or replace leaky dumpsters and containers.
* Cover dumpsters and other waster containers
* Never dispose of waster products in storm drain outlets
* Recycle wastes or dispose properly.
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Sulllivan Engineering Group, LLC ● 22 Mount Vernon Road ● Boxford, Massachusetts 01921 ● (978) 352-7871
Materials Storage
* Store materials such as grease, paints, detergents, metals, &
raw materials in appropriate, labeled containers
* Make sure all outdoor containers have lids, and that the lids are
are adequately closed.
* Store stockpiled materials inside a building, under a roof, or
covered with a tarp to prevent contact with rain
Training
* Train employees (including subcontractors) regularly on good
housekeeping practices.
* Assign a person to be responsible for effective implementation
of BMP’s
Equipment/Vehicle Cleaning
* Maintain equipment and vehicles regularly.
* Check for and fix leaks.
* Use drip pans to collect leaks or spills during
maintenance activities
* Wash equipment/vehicles in a designated and/or
covered area where the wash water is collected to be
recycled or discharged to the sanitary sewer.
Provisions for storing materials and waste products
See “Material Storage” in the Good Housekeeping Practices section.
Vehicle Washing Controls
See “Equipment/Vehicle Cleaning” in the Good Housekeeping Practices section
Requirements for routine inspection and maintenance of stormwater BMP’s
Wakefield Associates, Inc shall maintain the site in accordance with the following:
a. Parking Lot sweeping – Pavement and walkways shall be swept in the early spring immediately after
snow melt and at least twice other times annually. Paving and curbing – Paving and curbing shall be
maintained in good condition to channel surface runoff into the trench drains.
b. Roof drain inlets, downspouts, and roof drain pipes - All components of the roof drain collection
system and the trench grate system shall be inspected at least 3 times per year. Sediments and debris
shall be removed and disposed of in accordance with all applicable federal, state, and local laws. Any
components that become damaged shall be repaired or replaced immediately upon discovery to assure
proper conveyance of stormwater runoff into the subsurface infiltration system.
c. The stormceptor shall be inspected at least 3 times per year. Maintenance to the stormceptor unit shall
be in accordance with the manufacturer’s guidelines.
d. The catchbasin sumps shall be inspected at least 3 times per year and cleaned three times per year or
whenever the depth of deposits is greater than or equal to half the depth from bottom of structure to the
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lowest pipe. Sediments and debris shall be removed and disposed of in accordance with all applicable
federal, state, and local laws.
e. Vegetation shall be maintained in healthy condition to prevent erosion and sedimentation in the
drainage system and wetland resource areas.
Spill Prevention and Response Plan
All vehicles on site will be monitored for leaks and receive regular preventive maintenance to reduce
the chance of leakage.
Petroleum products will be stored in tightly sealed containers which are clearly labeled.
Spill kits will be included with all fueling sources and maintenance activities.
Any asphalt substances used onsite will be applied according to the manufacturer's recommendation.
All spills will be cleaned up immediately upon discovery. Spills large enough to reach the storm
system will be reported to the National Response Center at 1-800-424-8802.
Concrete trucks will not be allowed to wash out or discharge surplus concrete or drum wash water on
the site.
Sanitary waste will be collected from portable units a minimum of two times a week to avoid
overfilling.
A covered dumpster will be used for all waste materials.
All paint containers and curing compounds will be tightly sealed and stored when not required for use.
Excess paint will not be discharged to the storm system, but will be properly disposed according to the
manufacturer's instructions.
Materials and equipment necessary for spill cleanup will be kept in the temporary material storage
trailer onsite. Equipment will include, but not be limited to, brooms, dust pans, mops, rags, gloves,
goggles, kitty litter, sand, saw dust, and plastic and metal trash containers.
Provisions for maintenance of lawns, gardens, and other landscaped areas
Grassed, landscaped, and garden areas will require routine maintenance such as watering, cutting, pruning, etc.
Grass clippings, weeds, raked leaves, or tree branches should not be disposed of in wetland resource areas.
These items should be disposed in a dumpster, trash can, or contact the Revere DPW to see if the Town has a
designated disposal area.
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Requirements for storage and use of fertilizers, herbicides, and pesticides
Fertilizers, herbicides, and pesticides should be stored in a weather-tight enclosure and in accordance with
manufacturer’s requirements. The use of fertilizers, herbicides, and pesticides should be used in small
amounts and if possible, more environmentally sensitive alternatives would be preferred. Table 1 provides
common trade name materials and the storm water pollutants associated with these materials.
Table 1
Potential Construction Site Storm Water Pollutants
Trade Name Material
Pesticides (insecticides,
herbicides, rodenticides)
fungicides,
Chemical/Physical
Description (1)
Storm Water Pollutants(1)
Various colored to colorless liquid,
powder, pellets, or grains
Chlorinated hydrocarbons,
organophosphates, carbonates,
arsenic
Nitrogen, phosphorous
Calcium sulphate, calcium
carbonate, sulfuric acid
Perchloroethylene, methylene
chloride, trichloroethylene,
petroleum distillates
Oil, petroleum distillates
Limestone, sand
Polymers, epoxies
Metal oxides, stoddard solvent,
talc, calcium carbonate, arsenic
Naphtha
Soil, oil & grease, solids
Fertilizer
Plaster
Liquid or solid grains
White granules or powder
Cleaning solvents
Colorless,
liquid
Asphalt
Concrete
Glue, adhesives
Paints
Black solid
White solid
White or yellow liquid
Various colored liquid
Curing compounds
Wastewater from construction
equipment washing
Wood preservatives
Creamy white liquid
Water
Hydraulic oil/fluids
Gasoline
Brown oily petroleum hydrocarbon
Colorless, pale brown or pink
petroleum hydrocarbon
Clear, blue-green to yellow liquid
Diesel Fuel
Kerosene
blue,
or
yellow-green
Clear amber or dark brown liquid
Antifreeze/coolant
Pale yellow liquid petroleum
hydrocarbon
Clear green/yellow liquid
Erosion
Solid Particles
Stoddard solvent, petroleum
distillates,
arsenic,
copper,
chromium
Mineral oil
Benzene, ethyl benzene, toluene,
xylene, MTBE
Petroleum distillate, oil &
grease, naphthalene, xylenes
Coal oil, petroleum distillates
Ethylene
glycol,
propylene
glycol, heavy metals (copper,
lead, zinc)
Soil, Sediment
________________________________________________________________________________________
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Provisions for Solid Waste Management
All solid waste materials during construction will be collected and stored in a securely lidded metal dumpster.
All trash and construction debris from the site will be deposited in the dumpster. The dumpster will be
emptied as needed offsite. No construction materials will be buried on-site. All personnel will be instructed
regarding the correct procedure for waste disposal. All sanitary waste will be collected from the portable units
a minimum of two times per week. Good housekeeping and spill control practices will be followed during
construction to minimize storm water contamination from petroleum products, fertilizers, paints, and concrete.
Upon occupancy of the dwelling(s) and at the discretion of the Town curbside trash collection will be
provided for household solid waste.
Snow disposal and plowing plans relative to Wetland Resource Areas
Snow disposal and plowing will be the responsibility of the owner on private property only. Washington
Avenue and Brookdale Street are public ways and the Revere DPW provides plowing service to these ways.
Under no circumstance shall snow be disposed of in Town Line Brook Canal.
Winter Road salt and/or Sand use and storage restrictions
The owner may use winter road salt and/or sand for treatment of the driveway surfaces. The use of the sand
and/or salt shall be provided to the minimum extent to provide safety. Sand and/or winter salt shall be stored
off-site.
Street Sweeping Schedules
Pavement sweeping – Pavement areas shall be swept in the early spring immediately after snow melt and at
least twice other times annually. Since Washington Avenue and Brookdale Street are public ways the Town
of Revere may have a road sweeping program already in place. Wakefield Associates, Inc shall coordinate
with the Town to determine sweeping schedules.
Provisions for Prevention of Illicit Discharges to Stormwater Management System
Table 1 details numerous materials which should not be discharged to the Stormwater Management System.
If a “spill” occurs, please refer to the “Spill Prevention and Response” section of this report. The materials
listed in Table 1 should be stored in a weather-tight enclosure to reduce the risk of discharge to the stormwater
management system. In the event of a discharge to the Stormwater System, the catchbasins and drain
manholes should be pumped off contents by a licensed contractor.
Training for staff or personnel involved with implementing the LTPPP
Employees will be educated about the requirements of the LTPPP. This will include background on the
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components and goals of the LTPPP and hands-on-training in erosion controls, spill prevention and response,
good housekeeping, proper material handling, disposal and control of waste, equipment fueling, and proper
storage, washing, and inspection procedures. All employees will be trained prior to their first day on the site.
List of Emergency Contacts
Mr. Dana Lopez - phone number: (781-844-8282)
________________________________________________________________________________________
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Construction
Storm Water Pollution
Prevention Plan
770-778 Washington Avenue
Revere, MA
Mixed Use Development
April 25, 2014
TABLE OF CONTENTS
Page
INTRODUCTION
Background…………………………………………………………………………………………...
SWPPP Content………………………………………………………………………………………
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4
SWPPP COORDINATOR AND DUTIES………………………………………………………….
5
FACILITY DESCRIPTION
Site Location………………………………………………………………………………………….
Construction Type…………………………………………………………………………………….
Existing Site Conditions………………………………………………………………………………
Site Plan……………………………………………………………………………………………….
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6
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IDENTIFICATION OF POTENTIAL STORM WATER CONTAMINANTS
Significant Material Inventory……………………………………………………………………….
Potential Areas for Storm Water Contamination…………………………………………………….
A Summary of Available Storm Water Sampling Data……………………………………………...
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7
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STORM WATER MANAGEMENT CONTROLS
Temporary and Permanent Erosion Control Practices……………………………………………….
Construction Practices to Minimize Storm Water Contamination…………………………………...
Coordination of BMPs with Construction Activities…………………………………………………
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10-12
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MAINTENANCE INSPECTION PROCEDURES
Inspections……………………………………………………………………………………………
Employee Training……………………………………………………………………………………
Certification……………………………………………………………………………………………
Appendix A: INSPECTION LOGS
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14,15
LIST OF TABLES
1
2
Locations of Potential Sources of Storm Water Contamination
LIST OF FIGURES
* SEE APPROVED SITE PLAN FOR BMP’S & DRAINAGE AREAS
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1.0
INTRODUCTION
1.1
Background
In 1972, Congress passed the Federal Water Pollution Control Act (FWPCA), also known as the Clean Water Act (CWA), to
restore and maintain the quality of the nation's waterways. The ultimate goal was to make sure that rivers and streams were
fishable, swimmable, and drinkable. In 1987, the Water Quality Act (WQA) added provisions to the CWA that allowed the EPA to
govern storm water discharges from construction sites. On March 10, 2003, EPA published the final notice for General Permits for
Storm Water Discharges from Construction Activities Disturbing 1 Acre or Greater. The general permit includes provisions for
development of a Storm Water Pollution Prevention Plan (SWPPP) to maximize the potential benefits of pollution prevention and
sediment and erosion control measures at construction sites.
Development, implementation, and maintenance of the SWPPP will provide Wakefield Associates, Inc (general contractor) with
the framework for reducing soil erosion and minimizing pollutants in storm water during construction of the building.
The SWPPP will:
Define the characteristics of the site and the type of construction which will be occurring;
Describe the site plan for the facility to be constructed;
Describe the practices that will be implemented to control erosion and the release of pollutants in storm water;
Create an implementation schedule to ensure that the practices described in this SWPPP are in fact implemented and to
evaluate the plan’s effectiveness in reducing erosion, sediment, and pollutant levels in storm water discharged from the
site; and
Describe the final stabilization/termination design to minimize erosion and prevent storm water impacts after construction
is complete.
1.2
SWPPP Content
This SWPPP includes the following:
Identification of the SWPPP coordinator with a description of this person's duties;
Identification of the storm water pollution prevention team that will assist in implementation of the SWPPP during construction.
Description of the existing site conditions including existing land use for the site (i.e., wooded areas, open grassed areas,
pavement, buildings, etc.), soil types. at the site, as well as the location of surface waters which are located on or next to the site
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(wetlands, streams, rivers, lakes, ponds, etc.);
Identification of the body of water(s) which will receive runoff from the construction site, including the ultimate body of water that
receives the storm water;
Identification of drainage areas and potential storm water contaminants;
Description of storm water management controls and various Best Management Practices (BMPs) necessary to reduce erosion,
sediment and pollutants in storm water discharge;
Description of the facility monitoring plan and how controls will be coordinated with construction activities; and a
Description of the implementation schedule and provisions for amendment of the plan.
2.0
SWPPP COORDINATOR AND DUTIES
The construction site SWPPP coordinator for the facility is Mr. Dana Lopez (phone number: (781) 844-8282) with Wakefield
Associates, Inc., (general contractor). Mr. Lopez’s duties include the following:
Implement the SWPPP plan with the aid of the SWPPP team;
Oversee maintenance practices identified as BMPs in the SWPPP;
Implement and oversee employee training;
Conduct or provide for inspection and monitoring activities;
Identify other potential pollutant sources and make sure they are added to the plan;
Identify any deficiencies in the SWPPP and make sure they are corrected; and
Ensure that any changes in construction plans are addressed in the SWPPP.
3.0
FACILITY DESCRIPTION
3.1
Site Location
The construction site is located at 770-778 Washington Avenue, Revere. The site consists of 34,111 SF of land with site frontage
on Washington Avenue and Brookdale Street.
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3.2
Construction Type
The project will consist of a mixed use building constructed with wooden frames.
3.3
Existing Site Conditions
The present site consists of approximately 34,111 SF with existing buildings (to be razed) with the majority of the site being
previously disturbed. The topography of the site is relatively flat, sloping towards Town Line Brook Canal. Municipal water and
sewer service is available for the site.
3.4
Site Plan
The Site Plan by the PJF Associates shows property boundaries, the proposed location of the buildings, paved driveway locations,
BMP’s, and proposed site grading.
4.0
IDENTIFICATION OF POTENTIAL STORM WATER CONTAMINANTS
The purpose of this section is to identify pollutants that could impact storm water during construction of the facility.
4.1
Significant Material Inventory
Pollutants that result from clearing, grading, excavation, and building materials and have the potential to be present in storm water
runoff are listed in Table 1. This table includes information regarding material type, chemical and physical description, and the
specific regulated storm water pollutants associated with each material.
4.2
Potential Areas for Storm Water Contamination
The following potential source areas of storm water contamination were identified and evaluated:
Cleared and graded areas;
Building construction;
Construction site entrance and asphalt driveway construction;
All undisturbed areas.
Table 2 presents site specific information regarding storm water pollution potential from each of these areas.
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4.3
A Summary of Available Storm Water Sampling Data
No storm water sampling data is available for the site.
4.4
Waterbody Receiving Stormwater Discharge
Based on the most current USGS map for this area, the stormwater runoff for this site drains to the Town Line Brook Canal.
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Table 1
Trade Name Material
Chemical/Physical Description (1)
Storm Water Pollutants(1)
Pesticides (insecticides,fungicides,
herbicides, rodenticides)
Various colored to colorless liquid,
powder, pellets, or grains
Fertilizer
Plaster
Liquid or solid grains
White granules or powder
Cleaning solvents
Colorless,
liquid
Asphalt
Concrete
Glue, adhesives
Paints
Black solid
White solid
White or yellow liquid
Various colored liquid
Curing compounds
Wastewater from construction
equipment washing
Wood preservatives
Creamy white liquid
Water
Chlorinated hydrocarbons,
organophosphates, carbamates,
arsenic
Nitrogen, phosphorous
Calcium sulphate, calcium
carbonate, sulfuric acid
Perchloroethylene, methylene
chloride, trichloroethylene,
petroleum distillates
Oil, petroleum distillates
Limestone, sand
Polymers, epoxies
Metal oxides, stoddard solvent,
talc, calcium carbonate, arsenic
Naphtha
Soil, oil & grease, solids
Hydraulic oil/fluids
Gasoline
Brown oily petroleum hydrocarbon
Colorless, pale brown or pink
petroleum hydrocarbon
Clear, blue-green to yellow liquid
Diesel Fuel
Kerosene
blue,
or
yellow-green
Clear amber or dark brown liquid
Antifreeze/coolant
Pale yellow liquid petroleum
hydrocarbon
Clear green/yellow liquid
Erosion
Solid Particles
(1) Data obtained from MSDSs when available
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Stoddard solvent, petroleum
distillates,
arsenic,
copper,
chromium
Mineral oil
Benzene, ethyl benzene, toluene,
xylene, MTBE
Petroleum distillate, oil &
grease, naphthalene, xylenes
Coal oil, petroleum distillates
Ethylene
glycol,
propylene
glycol, heavy metals (copper,
lead, zinc)
Soil, Sediment
Table 2
Locations of Potential Sources of Storm Water Contamination
Drainage
Area
Potential Storm Water
Contamination Point
Potential Pollutants
Potential Problem
Building construction
Plaster, cleaning solvents, asphalt, concrete,
paints, hydraulic oil, gasoline, antifreeze,
soil erosion, fertilizer, pesticides, glue
adhesives, curing compounds, wood
preservatives, kerosene
Construction driveways
Asphalt, hydraulic oil, gasoline, antifreeze,
soil erosion, fertilizer, pesticides
Tree removal area
Soil erosion, fertilizer, pesticides
All undisturbed Areas
None
Accidental spills of paints and cleaning solvents,
leaking hydraulic oil and antifreeze from construction
equipment, gasoline and diesel fuel spills while
fueling construction equipment, erosion of exposed
and stockpiled soils, and degradation of scrap dry wall
can potentially contaminate storm water. Asphalt
chemicals can be released to storm water if a rain
event occurs before curing is complete.
Leaking hydraulic oil and antifreeze from clearing,
grading and asphalt application
construction equipment. Gasoline and diesel fuel
spills while fueling construction equipment, and
erosion of exposed and stockpiled soils. Asphalt
chemicals can be released to storm water if a rain
event occurs before curing is complete. Tracking of
soil into the road through the construction site
entrance.
Ruts caused by logging equipment can fill with water,
preventing complete re-vegetation.
No storm water related issues with this completely
vegetated area
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5.0
STORM WATER MANAGEMENT CONTROLS
The purpose of this section is to identify the types of temporary and permanent erosion and sediment controls that will be used
during construction activities. The controls will provide soil stabilization for disturbed areas and structural controls to divert runoff
and remove sediment. This section will also address control of other potential storm water pollutant sources such as construction
materials (paints, concrete dust, solvents, plaster), waste disposal, control of vehicle traffic, and sanitary waste disposal.
5.1
Temporary and Permanent Erosion Control Practices
A list of best management procedures (BMPs) has been developed and the locations of these BMPs are shown on the approved
Site Development plan. A number of the BMPs included in this plan have been developed to serve as post-construction storm
water controls.
Site Wide Control Measures
To prevent soil from washing into the undisturbed areas of the site, the following BMPs will be implemented:
Silt fencing will be placed along the perimeter of the entire site to be cleared and graded before any clearing or grading
takes place.
The existing catchbasins along Washington Avenue shall have a silt sack placed around the grate to allow water to flow to
the basin but prevent silt migration during construction activities.
Areas of the site which are to be paved will be temporarily stabilized by applying geotextile and stone sub-base until
asphalt is applied.
5.2
Construction Practices to Minimize Storm Water Contamination
All waste materials will be collected and stored in a securely lidded metal dumpster. All trash and construction debris from the
site will be deposited in the dumpster. The dumpster will be emptied as needed offsite. No construction materials will be buried
on-site. All personnel will be instructed regarding the correct procedure for waste disposal. All sanitary waste will be collected
from the portable units a minimum of two times per week. Good housekeeping and spill control practices will be followed during
construction to minimize storm water contamination from petroleum products, fertilizers, paints, and concrete. Good housekeeping
practices for each drainage area are list below.
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To prevent potential storm water contamination, the following BMPs will be implemented:
All vehicles on site will be monitored for leaks and receive regular preventive maintenance to reduce the chance of
leakage.
Petroleum products will be stored in tightly sealed containers which are clearly labeled.
Spill kits will be included with all fueling sources and maintenance activities.
All spills will be cleaned up immediately upon discovery. Spills large enough to reach the storm system will be reported
to the National Response Center at 1-800-424-8802.
Concrete trucks will not be allowed to wash out or discharge surplus concrete or drum wash water on the site.
Sanitary waste will be collected from portable units a minimum of two times a week to avoid overfilling.
A covered dumpster will be used for all waste materials.
All paint containers and curing compounds will be tightly sealed and stored when not required for use. Excess paint will
not be discharged to the storm system, but will be properly disposed according to the manufacturer's instructions.
Materials and equipment necessary for spill cleanup will be kept in the temporary material storage trailer onsite.
Equipment will include, but not be limited to, brooms, dust pans, mops, rags, gloves, goggles, kitty litter, sand, saw dust,
and plastic and metal trash containers.
Spray guns will be cleaned on a removable tarp.
5.3
Coordination of BMPs with Construction Activities
Structural BMPs will be coordinated with construction activities so the BMP is in place before construction begins. The following
BMPs will be coordinated with construction activities:
The temporary perimeter controls (silt fence) and the silt sacks in the catchbasins along Washington Avenue will be
installed before any clearing and grading begins.
Once construction activity ceases in an area, that area will be stabilized with permanent seed or other permanent
landscaping means.
The temporary perimeter controls (silt fencing) will not be removed until all construction activities at the site are
complete and soils have been stabilized.
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6.0
MAINTENANCE/INSPECTION PROCEDURES
6.1
Inspections
Visual inspections of all cleared and graded areas of the construction site will be performed daily and within 12 hours of the end of
a storm with rainfall amounts greater than 0.5 inches. The inspection will be conducted by the SWPPP coordinator or his
designated stormwater team members. The inspection will verify that the structural BMPs described in Section 5 of this SWPPP
are in good condition and are minimizing erosion. The inspection will also verify that the procedures used to prevent storm water
contamination from construction materials and petroleum products are effective.
The following inspection and maintenance practices will be used to maintain erosion and sediment controls:
Built up sediment will be removed from silt fencing when it has reached one third the height of the fence.
Silt fences will be inspected for depth of sediment, for tears, to see if the fabric is securely attached to the fence posts, and
to see that the fence posts are firmly in the ground.
Temporary and permanent seeding will be inspected for bare spots, washouts, and healthy growth.
The maintenance inspection report will be made after each inspection. A copy of the report form to be completed by the SWPPP
coordinator is provided in Appendix A of this SWPPP. Completed forms will be maintained on-site during the entire construction
project. Following construction, the completed forms will be retained at the general contractors office, Wakefield Associates, Inc,
for a minimum of 1 year.
If construction activities or design modifications are made to the site plan which could impact storm water, this SWPPP will be
amended appropriately. The amended SWPPP will have a description of the new activities that contribute to the increased
pollutant loading and the planned source control activities.
6.2
Employee Training
Employees will be educated about the requirements of the SWPPP. This will include background on the components and goals of
the SWPPP and hands-on-training in erosion controls, spill prevention and response, good housekeeping, proper material handling,
disposal and control of waste, equipment fueling, and proper storage, washing, and inspection procedures. All employees will be
trained prior to their first day on the site.
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6.3
Certification
Applicant Certification (Wakefield Associates, Inc. - Developer)
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted.
Based on my inquiry of the person or persons who manages the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that
there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing
violations.
_________________
Name
_________________
Title
_________________
Date
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Contractor Certification (Wakefield Associates, Inc - General Contractor)
I certify under penalty of law that I understand the terms and conditions of the general National Pollutant Discharge Elimination
System (NPDES) permit that authorizes the storm water discharges associated with industrial activity from the construction site
identified as part of this certification.
____________________
Name
____________________
Title
____________________
Date
14
Appendix A
Inspection Logs
15
770-778 Washington Avenue, Revere
Storm Water Pollution Prevention Plan
Inspection and Maintenance Report Form
To be completed every 7 days and within 24 hours of a rainfall event of 0.5 inches or more
Inspector: ______________________
Date:__________________
Inspector's Qualifications:
Days since last rainfall: ________________
Amount of last rainfall:
________
Stabilization Measures
Date Since
Date of
Drainage
Last
Next
Stabilized
Area
Disturbance
Disturbance
(Yes/No)
Stabilized With
Stabilization required:
To be performed by:_______________________
On or before:____________
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Condition
Driveway Entrance(s):
Does Much Sediment
Is the Gravel Clean or is it
Get Tracked on to
Filled with Sediment?
Road?
Maintenance required for driveway entrance(s):
____________________________________________________________________
To be performed by:_____________________
On or Before:______________________
17
Perimeter Structural Controls:
Date: ______________
Silt Fence
Drainage Area
Has Silt Reached
Is Fence Properly
Is There Evidence of
Perimeter
1/3 of Fence Height?
Secured?
Washout or Overtopping?
Maintenance required for silt fence:
To be performed by:_________________
On or before:________________
18
Changes required to the pollution prevention plan:
Reasons for changes:
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted.
Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that
there are signification penalties for submitting false information, including the possibility of fine and imprisonment for knowing
violations.
Signature:___________________________________
Date:________________________
19
Post-Construction
Stormwater Maintenance Plan
Beginning with the construction of the drainage system, and continuing in perpetuity thereafter, the owner(s)
of the site shall maintain in accordance with the following schedule:
a. Driveway sweeping and snow plowing – Pavement and walkways shall be swept in the early spring
immediately after snow melt and at least twice other times annually. Snow shall be plowed onto
grassed areas shown on the design plans to encourage infiltration during subsequent thawing periods.
Sediments shall be removed from grassed areas in the early spring.
b. Paving and stone pavers – Pavement and stone pavers shall be maintained in good condition.
c. Roof drain inlets, downspouts, and roof drain pipes - All components of the roof drain collection
system shall be inspected at least 3 times per year. Sediments and debris shall be removed and
disposed of in accordance with all applicable federal, state, and local laws. Any components that
become damaged shall be repaired or replaced immediately upon discovery to assure proper
conveyance of stormwater runoff into the subsurface infiltration system.
d. The stormceptor shall be inspected at least 3 times per year. Maintenance to the stormceptor unit shall
be in accordance with the manufacturer’s guidelines.
e. The catchbasin sumps shall be inspected at least 3 times per year. Sediments and debris shall be
removed and disposed of in accordance with all applicable federal, state and local laws.
f. Vegetation shall be maintained in healthy condition to prevent erosion and sedimentation in the
drainage system and wetland resource areas.
________________________________________________________________________________________
Sullivan Engineering Group, LLC ● 22 Mount Vernon Road ● Boxford, Massachusetts 01921 ● (978) 352-7871
3S
4S
1s
10R
13R
14R
2S
11R
9R
12R
7R
5S
8R
5R
6R
3R
1R
Subcat
Reach
Pond
Link
4R
2R
6S
7S
8S
Drainage Diagram for 770-778 Washington Ave, Revere
Prepared by Sullivan Engineering Group, LLC
4/28/2014
HydroCAD® 7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems
770-778 Washington Ave, Revere
Type III 24-hr 2 Year Storm Rainfall=3.10"
Page 2
4/28/2014
Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment 1s:
Runoff Area=1,593 sf Runoff Depth=2.68"
Tc=6.0 min CN=98 Runoff=0.11 cfs 0.008 af
Subcatchment 2S:
Subcatchment 3S:
Subcatchment 4S:
Subcatchment 5S:
Subcatchment 6S:
Subcatchment 7S:
Subcatchment 8S:
Reach 1R:
Peak Depth=0.41' Max Vel=3.5 fps Inflow=1.07 cfs 0.090 af
D=12.0" n=0.011 L=55.0' S=0.0051 '/' Capacity=3.00 cfs Outflow=1.06 cfs 0.090 af
Reach 2R:
Reach 3R:
Reach 4R:
Reach 5R:
Reach 6R:
Reach 7R:
Page 3
4/28/2014
Reach 8R:
Reach 9R:
Reach 10R:
Reach 11R:
Reach 12R:
Reach 13R:
Reach 14R:
Total Runoff Area = 0.404 ac Runoff Volume = 0.090 af Average Runoff Depth = 2.68"
Page 4
4/28/2014
Subcatchment 1s:
Runoff
=
0.11 cfs @ 12.09 hrs, Volume=
0.008 af, Depth= 2.68"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Area (sf)
1,593
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 1s:
Flow (cfs)
Hydrograph
0.12
0.115
0.11
0.105
0.1
0.095
0.09
0.085
0.08
0.075
0.07
0.065
0.06
0.055
0.05
0.045
0.04
0.035
0.03
0.025
0.02
0.015
0.01
0.005
0
0.11 cfs
5
6
7
8
9
10
11
Runoff
Type III 24-hr 2 Year Storm
Rainfall=3.10"
Runoff Area=1,593 sf
Runoff Volume=0.008 af
Runoff Depth=2.68"
Tc=6.0 min
CN=98
12
13
Time (hours)
14
15
16
17
18
19
20
Page 5
4/28/2014
Subcatchment 2S:
Runoff
=
0.008 af, Depth= 2.68"
Area (sf)
1,499
Tc Length
(min)
(feet)
0.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 2S:
Hydrograph
0.13
0.12 cfs
0.12
0.11
0.1
0.09
Flow (cfs)
0.08
0.07
0.06
0.05
Runoff
Rainfall=3.10"
Runoff Depth=2.68"
Tc=0.0 min
CN=98
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 6
4/28/2014
Subcatchment 3S:
Runoff
=
0.012 af, Depth= 2.68"
Area (sf)
2,410
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 3S:
Hydrograph
0.18
0.16 cfs
0.17
0.16
0.15
0.14
0.13
0.12
Flow (cfs)
0.11
0.1
0.09
0.08
0.07
Runoff
Rainfall=3.10"
Runoff Depth=2.68"
Tc=6.0 min
CN=98
0.06
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 7
4/28/2014
Subcatchment 4S:
Runoff
=
0.010 af, Depth= 2.68"
Area (sf)
1,866
Tc Length
(min)
(feet)
6.0
CN
98
Description
pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 4S:
Hydrograph
0.14
0.13 cfs
0.13
0.12
0.11
0.1
Flow (cfs)
0.09
0.08
0.07
0.06
0.05
Runoff
Rainfall=3.10"
Runoff Depth=2.68"
Tc=6.0 min
CN=98
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 8
4/28/2014
Subcatchment 5S:
Runoff
=
0.011 af, Depth= 2.68"
Area (sf)
2,092
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 5S:
Hydrograph
0.14 cfs
0.15
0.14
0.13
0.12
0.11
Flow (cfs)
0.1
0.09
0.08
0.07
0.06
Runoff
Rainfall=3.10"
Runoff Depth=2.68"
Tc=6.0 min
CN=98
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 9
4/28/2014
Subcatchment 6S:
Runoff
=
0.009 af, Depth= 2.68"
Area (sf)
1,682
CN
98
Description
Pavement
Subcatchment 6S:
Hydrograph
0.13 cfs
0.14
0.13
0.12
0.11
0.1
Flow (cfs)
0.09
0.08
0.07
0.06
Runoff
Rainfall=3.10"
Runoff Depth=2.68"
Tc=0.0 min
CN=98
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 10
4/28/2014
Subcatchment 7S:
Runoff
=
0.022 af, Depth= 2.68"
Area (sf)
4,380
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 7S:
Hydrograph
0.32
0.30 cfs
0.3
0.28
0.26
0.24
0.22
Flow (cfs)
0.2
0.18
0.16
0.14
0.12
Runoff
Rainfall=3.10"
Runoff Depth=2.68"
Tc=6.0 min
CN=98
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 11
4/28/2014
Subcatchment 8S:
Runoff
=
0.011 af, Depth= 2.68"
Area (sf)
2,070
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 8S:
Hydrograph
0.15
0.14 cfs
0.14
0.13
0.12
0.11
Flow (cfs)
0.1
0.09
0.08
0.07
0.06
Runoff
Rainfall=3.10"
Runoff Depth=2.68"
Tc=6.0 min
CN=98
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 12
4/28/2014
Reach 1R:
Inflow Area =
Inflow
=
Outflow
=
0.404 ac, Inflow Depth = 2.68" for 2 Year Storm event
0.090 af
0.090 af, Atten= 1%, Lag= 0.4 min
Routing by Stor-Ind+Trans method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Max. Velocity= 3.5 fps, Min. Travel Time= 0.3 min
Avg. Velocity = 1.4 fps, Avg. Travel Time= 0.7 min
Peak Depth= 0.41' @ 12.11 hrs
Capacity at bank full= 3.00 cfs
Inlet Invert= 1.28', Outlet Invert= 1.00'
12.0" Diameter Pipe n= 0.011 Length= 55.0' Slope= 0.0051 '/'
Reach 1R:
Hydrograph
Inflow
Outflow
1.07 cfs
1.06 cfs
Inflow Area=0.404 ac
Peak Depth=0.41'
Max Vel=3.5 fps
D=12.0"
n=0.011
L=55.0'
S=0.0051 '/'
Capacity=3.00 cfs
Flow (cfs)
1
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 13
4/28/2014
Reach 2R:
Inflow Area =
Inflow
=
Outflow
=
0.011 af
0.011 af, Atten= 2%, Lag= 0.9 min
Reach 2R:
Hydrograph
Inflow
Outflow
0.14 cfs
0.14 cfs
0.15
0.14
Peak Depth=0.15'
Max Vel=1.9 fps
D=12.0"
n=0.011
L=67.0'
S=0.0051 '/'
Capacity=3.00 cfs
0.13
0.12
0.11
Flow (cfs)
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 14
4/28/2014
Reach 3R:
Inflow Area =
Inflow
=
Outflow
=
0.080 af
0.079 af, Atten= 1%, Lag= 0.6 min
Reach 3R:
Hydrograph
Inflow
Outflow
0.94 cfs
0.93 cfs
Peak Depth=0.39'
Max Vel=3.3 fps
D=12.0"
n=0.011
L=81.0'
S=0.0049 '/'
Capacity=2.96 cfs
Flow (cfs)
1
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 15
4/28/2014
Reach 4R:
Inflow Area =
Inflow
=
Outflow
=
0.022 af
0.022 af, Atten= 1%, Lag= 0.3 min
Reach 4R:
Hydrograph
Inflow
Outflow
0.30 cfs
0.29 cfs
0.32
0.3
Peak Depth=0.21'
Max Vel=2.4 fps
D=12.0"
n=0.011
L=27.0'
S=0.0052 '/'
Capacity=3.03 cfs
0.28
0.26
0.24
0.22
Flow (cfs)
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 16
4/28/2014
Reach 5R:
Inflow Area =
Inflow
=
Outflow
=
0.057 af
0.057 af, Atten= 2%, Lag= 1.2 min
Reach 5R:
Hydrograph
Inflow
Outflow
0.66 cfs
0.65 cfs
0.7
Peak Depth=0.32'
Max Vel=3.0 fps
D=12.0"
n=0.011
L=132.0'
S=0.0050 '/'
Capacity=2.98 cfs
0.65
0.6
0.55
0.5
Flow (cfs)
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 17
4/28/2014
Reach 6R:
Inflow Area =
Inflow
=
Outflow
=
0.009 af
0.009 af, Atten= 2%, Lag= 0.3 min
Reach 6R:
Hydrograph
Inflow
Outflow
0.13 cfs
0.13 cfs
0.14
Peak Depth=0.14'
Max Vel=1.9 fps
D=12.0"
n=0.011
L=24.0'
S=0.0050 '/'
Capacity=2.98 cfs
0.13
0.12
0.11
0.1
Flow (cfs)
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 18
4/28/2014
Reach 7R:
Inflow Area =
Inflow
=
Outflow
=
0.048 af
0.048 af, Atten= 1%, Lag= 0.3 min
Reach 7R:
Hydrograph
Inflow
Outflow
0.59 cfs
0.59 cfs
0.65
0.6
Peak Depth=0.31'
Max Vel=2.9 fps
D=12.0"
n=0.011
L=29.0'
S=0.0048 '/'
Capacity=2.93 cfs
0.55
0.5
Flow (cfs)
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 19
4/28/2014
Reach 8R:
Inflow Area =
Inflow
=
Outflow
=
0.011 af
0.011 af, Atten= 1%, Lag= 0.5 min
Reach 8R:
Hydrograph
Inflow
Outflow
0.14 cfs
0.14 cfs
0.15
Peak Depth=0.15'
Max Vel=2.0 fps
D=12.0"
n=0.011
L=33.0'
S=0.0052 '/'
Capacity=3.02 cfs
0.14
0.13
0.12
0.11
Flow (cfs)
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 20
4/28/2014
Reach 9R:
Inflow Area =
Inflow
=
Outflow
=
0.016 af
0.016 af, Atten= 0%, Lag= 0.5 min
Reach 9R:
Flow (cfs)
Hydrograph
0.21
0.2
0.19
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
Inflow
Outflow
0.19 cfs
0.19 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Peak Depth=0.17'
Max Vel=2.1 fps
D=12.0"
n=0.011
L=38.0'
S=0.0050 '/'
Capacity=2.98 cfs
14
15
16
17
18
19
20
Page 21
4/28/2014
Reach 10R:
Inflow Area =
Inflow
=
Outflow
=
0.008 af
0.008 af, Atten= 2%, Lag= 0.7 min
Reach 10R:
Flow (cfs)
Hydrograph
0.12
0.115
0.11
0.105
0.1
0.095
0.09
0.085
0.08
0.075
0.07
0.065
0.06
0.055
0.05
0.045
0.04
0.035
0.03
0.025
0.02
0.015
0.01
0.005
0
Inflow
Outflow
0.11 cfs
0.11 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Peak Depth=0.13'
Max Vel=1.8 fps
D=12.0"
n=0.011
L=47.0'
S=0.0049 '/'
Capacity=2.95 cfs
14
15
16
17
18
19
20
Page 22
4/28/2014
Reach 11R:
Inflow Area =
Inflow
=
Outflow
=
0.008 af
0.008 af, Atten= 4%, Lag= 0.5 min
Reach 11R:
Hydrograph
Inflow
Outflow
0.12 cfs
0.11 cfs
0.13
0.12
Peak Depth=0.14'
Max Vel=1.8 fps
D=12.0"
n=0.011
L=42.0'
S=0.0050 '/'
Capacity=2.98 cfs
0.11
0.1
Flow (cfs)
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 23
4/28/2014
Reach 12R:
Inflow Area =
Inflow
=
Outflow
=
0.022 af
0.022 af, Atten= 1%, Lag= 0.5 min
Reach 12R:
Hydrograph
Inflow
Outflow
0.29 cfs
0.28 cfs
0.3
Peak Depth=0.20'
Max Vel=2.5 fps
D=12.0"
n=0.011
L=54.0'
S=0.0059 '/'
Capacity=3.24 cfs
0.28
0.26
0.24
0.22
Flow (cfs)
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 24
4/28/2014
Reach 13R:
Inflow Area =
Inflow
=
Outflow
=
0.012 af
0.012 af, Atten= 1%, Lag= 0.5 min
Reach 13R:
Hydrograph
Inflow
Outflow
0.16 cfs
0.16 cfs
0.18
0.17
Peak Depth=0.16'
Max Vel=2.0 fps
D=12.0"
n=0.011
L=33.0'
S=0.0048 '/'
Capacity=2.93 cfs
0.16
0.15
0.14
0.13
0.12
Flow (cfs)
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 25
4/28/2014
Reach 14R:
Inflow Area =
Inflow
=
Outflow
=
0.010 af
0.010 af, Atten= 1%, Lag= 0.5 min
Reach 14R:
Hydrograph
Inflow
Outflow
0.13 cfs
0.12 cfs
0.14
0.13
Peak Depth=0.14'
Max Vel=1.9 fps
D=12.0"
n=0.011
L=33.0'
S=0.0048 '/'
Capacity=2.93 cfs
0.12
0.11
0.1
Flow (cfs)
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 26
4/28/2014
Subcatchment 1s:
Subcatchment 2S:
Subcatchment 3S:
Subcatchment 4S:
Subcatchment 5S:
Subcatchment 6S:
Subcatchment 7S:
Subcatchment 8S:
Reach 1R:
Reach 2R:
Reach 3R:
Reach 4R:
Reach 5R:
Reach 6R:
Reach 7R:
Page 27
4/28/2014
Reach 8R:
Reach 9R:
Reach 10R:
Reach 11R:
Reach 12R:
Reach 13R:
Reach 14R:
Page 28
4/28/2014
Subcatchment 1s:
Runoff
=
0.012 af, Depth= 3.96"
Area (sf)
1,593
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 1s:
Hydrograph
0.17
0.16 cfs
0.16
0.15
0.14
0.13
0.12
Flow (cfs)
0.11
0.1
0.09
0.08
0.07
Runoff
Rainfall=4.50"
Runoff Depth=3.96"
Tc=6.0 min
CN=98
0.06
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 29
4/28/2014
Subcatchment 2S:
Runoff
=
0.011 af, Depth= 3.96"
Area (sf)
1,499
Tc Length
(min)
(feet)
0.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 2S:
Hydrograph
0.19
0.17 cfs
0.18
0.17
0.16
0.15
0.14
0.13
Flow (cfs)
0.12
0.11
0.1
0.09
0.08
Runoff
Rainfall=4.50"
Runoff Depth=3.96"
Tc=0.0 min
CN=98
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 30
4/28/2014
Subcatchment 3S:
Runoff
=
0.018 af, Depth= 3.96"
Area (sf)
2,410
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 3S:
Hydrograph
0.26
0.24 cfs
0.24
0.22
0.2
0.18
Flow (cfs)
0.16
0.14
0.12
Runoff
Rainfall=4.50"
Runoff Depth=3.96"
Tc=6.0 min
CN=98
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 31
4/28/2014
Subcatchment 4S:
Runoff
=
0.014 af, Depth= 3.96"
Area (sf)
1,866
Tc Length
(min)
(feet)
6.0
CN
98
Description
pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 4S:
Hydrograph
0.2
0.19
0.18 cfs
0.18
0.17
0.16
Flow (cfs)
0.15
0.14
0.13
0.12
0.11
0.1
0.09
0.08
0.07
Runoff
Rainfall=4.50"
Runoff Depth=3.96"
Tc=6.0 min
CN=98
0.06
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 32
4/28/2014
Subcatchment 5S:
Runoff
=
0.016 af, Depth= 3.96"
Area (sf)
2,092
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 5S:
Flow (cfs)
Hydrograph
0.23
0.22
0.21
0.2
0.19
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
0.21 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Runoff
Rainfall=4.50"
Runoff Depth=3.96"
Tc=6.0 min
CN=98
14
15
16
17
18
19
20
Page 33
4/28/2014
Subcatchment 6S:
Runoff
=
0.013 af, Depth= 3.96"
Area (sf)
1,682
CN
98
Description
Pavement
Subcatchment 6S:
Flow (cfs)
Hydrograph
0.21
0.2
0.19
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
0.19 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Runoff
Rainfall=4.50"
Runoff Depth=3.96"
Tc=0.0 min
CN=98
14
15
16
17
18
19
20
Page 34
4/28/2014
Subcatchment 7S:
Runoff
=
0.033 af, Depth= 3.96"
Area (sf)
4,380
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 7S:
Flow (cfs)
Hydrograph
0.48
0.46
0.44
0.42
0.4
0.38
0.36
0.34
0.32
0.3
0.28
0.26
0.24
0.22
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
0.43 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Runoff
Rainfall=4.50"
Runoff Depth=3.96"
Tc=6.0 min
CN=98
14
15
16
17
18
19
20
Page 35
4/28/2014
Subcatchment 8S:
Runoff
=
0.016 af, Depth= 3.96"
Area (sf)
2,070
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 8S:
Flow (cfs)
Hydrograph
0.22
0.21
0.2
0.19
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
0.20 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Runoff
Rainfall=4.50"
Runoff Depth=3.96"
Tc=6.0 min
CN=98
14
15
16
17
18
19
20
Page 36
4/28/2014
Reach 1R:
Inflow Area =
Inflow
=
Outflow
=
0.133 af
0.133 af, Atten= 1%, Lag= 0.4 min
Reach 1R:
Hydrograph
Inflow
Outflow
Flow (cfs)
1.57 cfs
1.56 cfs
Peak Depth=0.51'
Max Vel=3.9 fps
D=12.0"
n=0.011
L=55.0'
S=0.0051 '/'
Capacity=3.00 cfs
1
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 37
4/28/2014
Reach 2R:
Inflow Area =
Inflow
=
Outflow
=
0.016 af
0.016 af, Atten= 2%, Lag= 0.8 min
Reach 2R:
Flow (cfs)
Hydrograph
0.22
0.21
0.2
0.19
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
Inflow
Outflow
0.20 cfs
0.20 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Peak Depth=0.18'
Max Vel=2.2 fps
D=12.0"
n=0.011
L=67.0'
S=0.0051 '/'
Capacity=3.00 cfs
14
15
16
17
18
19
20
Page 38
4/28/2014
Reach 3R:
Inflow Area =
Inflow
=
Outflow
=
0.118 af
0.117 af, Atten= 1%, Lag= 0.6 min
Reach 3R:
Hydrograph
Inflow
Outflow
1.39 cfs
1.37 cfs
Peak Depth=0.48'
Max Vel=3.7 fps
D=12.0"
n=0.011
L=81.0'
S=0.0049 '/'
Capacity=2.96 cfs
Flow (cfs)
1
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 39
4/28/2014
Reach 4R:
Inflow Area =
Inflow
=
Outflow
=
0.033 af
0.033 af, Atten= 0%, Lag= 0.3 min
Reach 4R:
Flow (cfs)
Hydrograph
0.48
0.46
0.44
0.42
0.4
0.38
0.36
0.34
0.32
0.3
0.28
0.26
0.24
0.22
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
Inflow
Outflow
0.43 cfs
0.43 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Peak Depth=0.26'
Max Vel=2.7 fps
D=12.0"
n=0.011
L=27.0'
S=0.0052 '/'
Capacity=3.03 cfs
14
15
16
17
18
19
20
Page 40
4/28/2014
Reach 5R:
Inflow Area =
Inflow
=
Outflow
=
0.084 af
0.084 af, Atten= 1%, Lag= 1.1 min
Reach 5R:
Hydrograph
Inflow
Outflow
0.97 cfs
0.96 cfs
Peak Depth=0.39'
Max Vel=3.4 fps
D=12.0"
n=0.011
L=132.0'
S=0.0050 '/'
Capacity=2.98 cfs
Flow (cfs)
1
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 41
4/28/2014
Reach 6R:
Inflow Area =
Inflow
=
Outflow
=
0.013 af
0.013 af, Atten= 2%, Lag= 0.2 min
Reach 6R:
Flow (cfs)
Hydrograph
0.21
0.2
0.19
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
Inflow
Outflow
0.19 cfs
0.19 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Peak Depth=0.17'
Max Vel=2.1 fps
D=12.0"
n=0.011
L=24.0'
S=0.0050 '/'
Capacity=2.98 cfs
14
15
16
17
18
19
20
Page 42
4/28/2014
Reach 7R:
Inflow Area =
Inflow
=
Outflow
=
0.072 af
0.072 af, Atten= 0%, Lag= 0.2 min
Reach 7R:
Hydrograph
Inflow
Outflow
0.87 cfs
0.87 cfs
0.95
0.9
Peak Depth=0.37'
Max Vel=3.2 fps
D=12.0"
n=0.011
L=29.0'
S=0.0048 '/'
Capacity=2.93 cfs
0.85
0.8
0.75
0.7
Flow (cfs)
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 43
4/28/2014
Reach 8R:
Inflow Area =
Inflow
=
Outflow
=
0.016 af
0.016 af, Atten= 1%, Lag= 0.4 min
Reach 8R:
Flow (cfs)
Hydrograph
0.23
0.22
0.21
0.2
0.19
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
Inflow
Outflow
0.21 cfs
0.20 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Peak Depth=0.18'
Max Vel=2.2 fps
D=12.0"
n=0.011
L=33.0'
S=0.0052 '/'
Capacity=3.02 cfs
14
15
16
17
18
19
20
Page 44
4/28/2014
Reach 9R:
Inflow Area =
Inflow
=
Outflow
=
0.023 af
0.023 af, Atten= 0%, Lag= 0.5 min
Reach 9R:
Hydrograph
Inflow
Outflow
0.28 cfs
0.28 cfs
0.3
0.28
Peak Depth=0.21'
Max Vel=2.4 fps
D=12.0"
n=0.011
L=38.0'
S=0.0050 '/'
Capacity=2.98 cfs
0.26
0.24
0.22
Flow (cfs)
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 45
4/28/2014
Reach 10R:
Inflow Area =
Inflow
=
Outflow
=
0.012 af
0.012 af, Atten= 1%, Lag= 0.6 min
Reach 10R:
Hydrograph
Inflow
Outflow
0.16 cfs
0.15 cfs
0.17
0.16
Peak Depth=0.16'
Max Vel=2.0 fps
D=12.0"
n=0.011
L=47.0'
S=0.0049 '/'
Capacity=2.95 cfs
0.15
0.14
0.13
0.12
Flow (cfs)
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 46
4/28/2014
Reach 11R:
Inflow Area =
Inflow
=
Outflow
=
0.011 af
0.011 af, Atten= 3%, Lag= 0.5 min
Reach 11R:
Hydrograph
Inflow
Outflow
0.17 cfs
0.17 cfs
0.19
0.18
0.17
Peak Depth=0.16'
Max Vel=2.1 fps
D=12.0"
n=0.011
L=42.0'
S=0.0050 '/'
Capacity=2.98 cfs
0.16
0.15
0.14
Flow (cfs)
0.13
0.12
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 47
4/28/2014
Reach 12R:
Inflow Area =
Inflow
=
Outflow
=
0.032 af
0.032 af, Atten= 1%, Lag= 0.5 min
Reach 12R:
Flow (cfs)
Hydrograph
0.46
0.44
0.42
0.4
0.38
0.36
0.34
0.32
0.3
0.28
0.26
0.24
0.22
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
Inflow
Outflow
0.42 cfs
0.41 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Peak Depth=0.24'
Max Vel=2.8 fps
D=12.0"
n=0.011
L=54.0'
S=0.0059 '/'
Capacity=3.24 cfs
14
15
16
17
18
19
20
Page 48
4/28/2014
Reach 13R:
Inflow Area =
Inflow
=
Outflow
=
0.018 af
0.018 af, Atten= 1%, Lag= 0.4 min
Reach 13R:
Hydrograph
Inflow
Outflow
0.24 cfs
0.24 cfs
0.26
0.24
Peak Depth=0.19'
Max Vel=2.2 fps
D=12.0"
n=0.011
L=33.0'
S=0.0048 '/'
Capacity=2.93 cfs
0.22
0.2
Flow (cfs)
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 49
4/28/2014
Reach 14R:
Inflow Area =
Inflow
=
Outflow
=
0.014 af
0.014 af, Atten= 1%, Lag= 0.4 min
Reach 14R:
Flow (cfs)
Hydrograph
0.2
0.19
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
Inflow
Outflow
0.18 cfs
0.18 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Peak Depth=0.17'
Max Vel=2.1 fps
D=12.0"
n=0.011
L=33.0'
S=0.0048 '/'
Capacity=2.93 cfs
14
15
16
17
18
19
20
Page 50
4/28/2014
Subcatchment 1s:
Subcatchment 2S:
Subcatchment 3S:
Subcatchment 4S:
Subcatchment 5S:
Subcatchment 6S:
Subcatchment 7S:
Subcatchment 8S:
Reach 1R:
Reach 2R:
Reach 3R:
Reach 4R:
Reach 5R:
Reach 6R:
Reach 7R:
Page 51
4/28/2014
Reach 8R:
Reach 9R:
Reach 10R:
Reach 11R:
Reach 12R:
Reach 13R:
Reach 14R:
Page 52
4/28/2014
Subcatchment 1s:
Runoff
=
0.018 af, Depth= 5.87"
Area (sf)
1,593
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 1s:
Flow (cfs)
Hydrograph
0.25
0.24
0.23
0.22
0.21
0.2
0.19
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
0.23 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Runoff
Rainfall=6.60"
Runoff Depth=5.87"
Tc=6.0 min
CN=98
14
15
16
17
18
19
20
Page 53
4/28/2014
Subcatchment 2S:
Runoff
=
0.017 af, Depth= 5.87"
Area (sf)
1,499
Tc Length
(min)
(feet)
0.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 2S:
Hydrograph
0.28
0.25 cfs
0.26
0.24
0.22
0.2
Flow (cfs)
0.18
0.16
0.14
0.12
Runoff
Rainfall=6.60"
Runoff Depth=5.87"
Tc=0.0 min
CN=98
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 54
4/28/2014
Subcatchment 3S:
Runoff
=
0.027 af, Depth= 5.87"
Area (sf)
2,410
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 3S:
Hydrograph
0.38
0.35 cfs
0.36
0.34
0.32
0.3
0.28
0.26
Flow (cfs)
0.24
0.22
0.2
0.18
Runoff
Rainfall=6.60"
Runoff Depth=5.87"
Tc=6.0 min
CN=98
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 55
4/28/2014
Subcatchment 4S:
Runoff
=
0.021 af, Depth= 5.87"
Area (sf)
1,866
Tc Length
(min)
(feet)
6.0
CN
98
Description
pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 4S:
Hydrograph
0.3
0.27 cfs
0.28
0.26
0.24
0.22
Flow (cfs)
0.2
0.18
0.16
0.14
Runoff
Rainfall=6.60"
Runoff Depth=5.87"
Tc=6.0 min
CN=98
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 56
4/28/2014
Subcatchment 5S:
Runoff
=
0.024 af, Depth= 5.87"
Area (sf)
2,092
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 5S:
Hydrograph
0.30 cfs
0.32
0.3
0.28
0.26
0.24
Flow (cfs)
0.22
0.2
0.18
0.16
Runoff
Rainfall=6.60"
Runoff Depth=5.87"
Tc=6.0 min
CN=98
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 57
4/28/2014
Subcatchment 6S:
Runoff
=
0.019 af, Depth= 5.87"
Area (sf)
1,682
CN
98
Description
Pavement
Subcatchment 6S:
Hydrograph
0.32
0.29 cfs
0.3
0.28
0.26
0.24
0.22
Flow (cfs)
0.2
0.18
0.16
0.14
Runoff
Rainfall=6.60"
Runoff Depth=5.87"
Tc=0.0 min
CN=98
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 58
4/28/2014
Subcatchment 7S:
Runoff
=
0.049 af, Depth= 5.87"
Area (sf)
4,380
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 7S:
Hydrograph
0.7
0.64 cfs
0.65
0.6
0.55
0.5
Flow (cfs)
0.45
0.4
0.35
0.3
Runoff
Rainfall=6.60"
Runoff Depth=5.87"
Tc=6.0 min
CN=98
0.25
0.2
0.15
0.1
0.05
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 59
4/28/2014
Subcatchment 8S:
Runoff
=
0.023 af, Depth= 5.87"
Area (sf)
2,070
Tc Length
(min)
(feet)
6.0
CN
98
Description
Pavement
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
Direct Entry,
Subcatchment 8S:
Hydrograph
0.30 cfs
0.32
0.3
0.28
0.26
0.24
Flow (cfs)
0.22
0.2
0.18
0.16
0.14
Runoff
Rainfall=6.60"
Runoff Depth=5.87"
Tc=6.0 min
CN=98
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 60
4/28/2014
Reach 1R:
Inflow Area =
Inflow
=
Outflow
=
0.197 af
0.197 af, Atten= 1%, Lag= 0.4 min
Reach 1R:
Hydrograph
Inflow
Outflow
2.33 cfs
2.31 cfs
Peak Depth=0.66'
Max Vel=4.2 fps
D=12.0"
n=0.011
L=55.0'
S=0.0051 '/'
Capacity=3.00 cfs
Flow (cfs)
2
1
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 61
4/28/2014
Reach 2R:
Inflow Area =
Inflow
=
Outflow
=
0.023 af
0.023 af, Atten= 2%, Lag= 0.7 min
Reach 2R:
Hydrograph
Inflow
Outflow
0.30 cfs
0.30 cfs
0.32
0.3
Peak Depth=0.21'
Max Vel=2.4 fps
D=12.0"
n=0.011
L=67.0'
S=0.0051 '/'
Capacity=3.00 cfs
0.28
0.26
0.24
Flow (cfs)
0.22
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 62
4/28/2014
Reach 3R:
Inflow Area =
Inflow
=
Outflow
=
0.174 af
0.174 af, Atten= 1%, Lag= 0.6 min
Reach 3R:
Hydrograph
Inflow
Outflow
2.05 cfs
2.03 cfs
Peak Depth=0.61'
Max Vel=4.1 fps
D=12.0"
n=0.011
L=81.0'
S=0.0049 '/'
Capacity=2.96 cfs
Flow (cfs)
2
1
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 63
4/28/2014
Reach 4R:
Inflow Area =
Inflow
=
Outflow
=
0.049 af
0.049 af, Atten= 0%, Lag= 0.3 min
Reach 4R:
Hydrograph
Inflow
Outflow
0.64 cfs
0.63 cfs
0.7
0.65
Peak Depth=0.31'
Max Vel=3.0 fps
D=12.0"
n=0.011
L=27.0'
S=0.0052 '/'
Capacity=3.03 cfs
0.6
0.55
0.5
Flow (cfs)
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 64
4/28/2014
Reach 5R:
Inflow Area =
Inflow
=
Outflow
=
0.125 af
0.125 af, Atten= 1%, Lag= 1.0 min
Reach 5R:
Hydrograph
Inflow
Outflow
1.44 cfs
1.42 cfs
Peak Depth=0.49'
Max Vel=3.7 fps
D=12.0"
n=0.011
L=132.0'
S=0.0050 '/'
Capacity=2.98 cfs
Flow (cfs)
1
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 65
4/28/2014
Reach 6R:
Inflow Area =
Inflow
=
Outflow
=
0.019 af
0.019 af, Atten= 2%, Lag= 0.2 min
Reach 6R:
Hydrograph
Inflow
Outflow
0.29 cfs
0.28 cfs
0.32
0.3
Peak Depth=0.21'
Max Vel=2.4 fps
D=12.0"
n=0.011
L=24.0'
S=0.0050 '/'
Capacity=2.98 cfs
0.28
0.26
0.24
0.22
Flow (cfs)
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 66
4/28/2014
Reach 7R:
Inflow Area =
Inflow
=
Outflow
=
0.106 af
0.106 af, Atten= 0%, Lag= 0.2 min
Reach 7R:
Hydrograph
Inflow
Outflow
1.28 cfs
1.28 cfs
Peak Depth=0.46'
Max Vel=3.6 fps
D=12.0"
n=0.011
L=29.0'
S=0.0048 '/'
Capacity=2.93 cfs
Flow (cfs)
1
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 67
4/28/2014
Reach 8R:
Inflow Area =
Inflow
=
Outflow
=
0.024 af
0.023 af, Atten= 1%, Lag= 0.4 min
Reach 8R:
Hydrograph
Inflow
Outflow
0.30 cfs
0.30 cfs
0.32
Peak Depth=0.21'
Max Vel=2.5 fps
D=12.0"
n=0.011
L=33.0'
S=0.0052 '/'
Capacity=3.02 cfs
0.3
0.28
0.26
0.24
Flow (cfs)
0.22
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 68
4/28/2014
Reach 9R:
Inflow Area =
Inflow
=
Outflow
=
0.035 af
0.035 af, Atten= 0%, Lag= 0.5 min
Reach 9R:
Flow (cfs)
Hydrograph
0.44
0.42
0.4
0.38
0.36
0.34
0.32
0.3
0.28
0.26
0.24
0.22
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
Inflow
Outflow
0.41 cfs
0.41 cfs
5
6
7
8
9
10
11
12
13
Time (hours)
Peak Depth=0.25'
Max Vel=2.7 fps
D=12.0"
n=0.011
L=38.0'
S=0.0050 '/'
Capacity=2.98 cfs
14
15
16
17
18
19
20
Page 69
4/28/2014
Reach 10R:
Inflow Area =
Inflow
=
Outflow
=
0.018 af
0.018 af, Atten= 1%, Lag= 0.6 min
Reach 10R:
Hydrograph
Inflow
Outflow
0.23 cfs
0.23 cfs
0.24
Peak Depth=0.19'
Max Vel=2.2 fps
D=12.0"
n=0.011
L=47.0'
S=0.0049 '/'
Capacity=2.95 cfs
0.22
0.2
0.18
Flow (cfs)
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 70
4/28/2014
Reach 11R:
Inflow Area =
Inflow
=
Outflow
=
0.017 af
0.017 af, Atten= 3%, Lag= 0.4 min
Reach 11R:
Hydrograph
Inflow
Outflow
0.25 cfs
0.25 cfs
0.28
0.26
Peak Depth=0.20'
Max Vel=2.3 fps
D=12.0"
n=0.011
L=42.0'
S=0.0050 '/'
Capacity=2.98 cfs
0.24
0.22
0.2
Flow (cfs)
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 71
4/28/2014
Reach 12R:
Inflow Area =
Inflow
=
Outflow
=
0.048 af
0.048 af, Atten= 1%, Lag= 0.4 min
Reach 12R:
Hydrograph
Inflow
Outflow
0.62 cfs
0.61 cfs
0.65
Peak Depth=0.30'
Max Vel=3.2 fps
D=12.0"
n=0.011
L=54.0'
S=0.0059 '/'
Capacity=3.24 cfs
0.6
0.55
0.5
Flow (cfs)
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 72
4/28/2014
Reach 13R:
Inflow Area =
Inflow
=
Outflow
=
0.027 af
0.027 af, Atten= 1%, Lag= 0.4 min
Reach 13R:
Hydrograph
Inflow
Outflow
0.35 cfs
0.35 cfs
0.38
0.36
Peak Depth=0.23'
Max Vel=2.5 fps
D=12.0"
n=0.011
L=33.0'
S=0.0048 '/'
Capacity=2.93 cfs
0.34
0.32
0.3
0.28
Flow (cfs)
0.26
0.24
0.22
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20
Page 73
4/28/2014
Reach 14R:
Inflow Area =
Inflow
=
Outflow
=
0.021 af
0.021 af, Atten= 1%, Lag= 0.4 min
Reach 14R:
Hydrograph
Inflow
Outflow
0.27 cfs
0.27 cfs
0.3
0.28
Peak Depth=0.21'
Max Vel=2.3 fps
D=12.0"
n=0.011
L=33.0'
S=0.0048 '/'
Capacity=2.93 cfs
0.26
0.24
0.22
Flow (cfs)
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
5
6
7
8
9
10
11
12
13
Time (hours)
14
15
16
17
18
19
20

May 22, 2014 Mr. Andrew B. DeSantis, Chair

Transcription

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