D # XXXX - New York State Department of Transportation
STORM WATER POLLUTION PREVENTION PLAN (SWPPP)
FOR NON-DOT PROJECTS
month year
PROJECT TITLE
MUNICIPALITY
COUNTY
Table of Contents
I. Introduction
1) Scope of the Project
2) Location of Project (Narrative)
3) Project Type and Size
4) Project Description
5) Cultural Resources
II. Project Maps and Plans
1) Location Map
2) Soil Maps
3) Erosion Control Plans
4) Existing and Proposed Subcatchment Maps
III. Project Soils
1) NRCS Soil Map @ project location
2) Soil Types
3) Discussion of Soil Characteristics and Soil Erosion Hazard Potential:
IV. Construction Phasing
1) Sequence of Construction Activities
2) Special Notes Covering Construction Sequence
V. Erosion and Sediment Control Measures
1) Erosion Control Plan
2) Permanent Erosion and Sediment Control Measures
3) Installation Sequence
4) Maintenance Schedule
5) SWPPP Implementation Responsibilities
VI. Existing Watershed Information
1) Table of Receiving Waterbodies
2) Existing Watershed(s) Table
VII. Green Infrastructure
1) Reduction of Impervious Cover
2) Runoff Reduction Techniques
VIII. Post Construction Stormwater Control Practices
1) Table of Post Construction Practices
2) Post Construction Practices Plan
3) Hydraulic Analysis of Stormwater Control Practices Including Pre-Development and Post-Development Conditions
4) Maintenance Table of Post-construction Stormwater Control Practices
IX. Appendix
(A) Location Map
(B) NRCS Soil Map w/ Area of Disturbance
(C) Erosion & Sediment Control Plans, Details, Notes
(D) Hydrologic Analysis
(E) Miscellaneous Forms
May include, but not limited to, the following:
a. Notice of Intent
b. SPDES Permit Certification Form
c. SWPPP Revision Form
d. SPDES Stormwater Inspection Report
e. Notice to Disturb Greater Than 5 Acres of Soil
f. Notice to Reduce Frequency of Site Inspections
(F) Cultural Resource Information
I. Introduction
(Boilerplate)
A stormwater management assessment has been conducted for the proposed project in order to protect the waters of the State of New York from the adverse impacts of stormwater runoff. This report presents an analysis of the project in accordance with the New York State Department of Environmental Conservation SPDES General Permit for Stormwater Discharges from Construction Activity Permit No. GP-0-10-001 (Double check permit # to be sure it is current) and the New York State Stormwater Management Design Manual. As required, the Stormwater Pollution Prevention Plan is designed, where appropriate, to incorporate green infrastructure techniques that preserve natural resources and utilize the existing hydrology of the site, provide runoff reduction practices, water quality treatment practices, apply volume and peak control practices for channel protection, overbank flood control, and extreme flood control as appropriate.
(Boilerplate, except insert area of disturbance and state whether the project is exempt from any of the post-construction stormwater controls – see HDM Chapter 8, Appendix B for discussion of these exemptions)
In accordance with Appendix B, Table 2 of the SPDES General Permit for Construction Activity, GP-0-10-001, road construction or reconstruction projects that involve a soil disturbance of one or more acres require the preparation of a full SWPPP that includes post-construction stormwater management practices. In total, approximately x.xx acres of soil disturbance is expected during the construction of this project. Therefore, this project requires the development of a full SWPPP, including erosion and sediment controls, green infrastructure site planning techniques, runoff reduction volume practices and post-construction stormwater management practices.
The general contractor and subcontractors performing any activity that involves soil
disturbance will be required to comply with the terms and conditions of the SWPPP for
the project identified as a condition of authorization to discharge stormwater. The
Contractor shall provide signed certifications (Form CONR 5) for itself and all applicable
subcontractors at the preconstruction meeting. These signed certifications shall be
included as part of the SWPPP. The SPDES General Permit and SWPPP must be kept
on file at the NYSDOT Project Field Office.
As required by the conditions described in the SPDES general permit, the SWPPP shall
be kept current and changes made to reflect changes in the design, construction, and
operation or in the maintenance of the project.
The complete set of construction drawings and specifications are provided as separate documents; however, they should be considered an integral component of the SWPPP and are referenced throughout this document.
1) Scope of the Project: The project will address safety and infrastructure problems along this section of Route 9P attributed to the deteriorating condition of the existing bridge.
2) Location of Project: The project extends from a point on the south approach just north of the Stewarts shop on the east side of Route 9P, across the lake to the intersection of Route 9P and Crescent Avenue, approximately 0.85 km to the north. The project straddles the border between the City of Saratoga Springs on the north side of the bridge and the Town of Saratoga on the south side of the bridge. Development patterns on each side of the lake are identical with a patchwork of commercial and residential uses blending together. Refer to the Location Map in Appendix A.
(Check to see if the project falls in either a TMDL watershed or discharges into a 303(d) listed waterbody)
This project is not located within a TMDL watershed and does not discharge into a 303(d) listed water.
Table 1 - Location Table
|Approximate Coordinate Position @ Center of Project |
|Latitude |73° 43’ 19”W |
|Longitude |43° 3’ 15”N |
3) Project Type and Size: The project is expected to progress as a Bridge Replacement Project and the project work area is approximately 1.89 acres.
4) Project Description: The proposed transportation project under consideration will address the reconstruction of the bridge carrying NYS Route 9P over the Saratoga Lake outlet, located in the Town of Saratoga and the City of Saratoga Springs in Saratoga County. The project begins on the south approach to the bridge, just north of the Stewarts on the east side of 9P and continues across the span, up the hill, to the intersection of NYS Route 9P and Crescent Avenue. The work consists of reconstruction of the north and south approaches and the bridge itself, construction of closed drainage on both sides of the bridge and expansion of an existing drainage swale on the north side of the bridge to provide water quality treatment for roadway runoff. During construction, traffic will be maintained via an offsite detour. The existing structure will be demolished and a new structure will be constructed at the original location.
(Discussion of Cultural Resource issues and process for the project)
5) Cultural Resources: New York State Historic Preservation Act (Section 14.09) - The existing bridge has been identified as a National Register Eligible (NRE) resource. A Cultural Resource Survey (CRS) has been completed and results have been received. The Historic American Engineering Record (HAER) has been completed. New York State has made an effect determination of "adverse effect". A Memorandum of Agreement (MOA) has been completed and approved by the New York State Historic Preservation Officer and the New York State Department of Transportation.
II. Project Maps and Plans
1) Location Map: See Appendix A
2) Soil Maps: See Appendix B
3) Erosion and Sediment Control Plans: See Appendix C
4) Existing and Proposed Subcatchment Maps: See Appendix D
III. Project Soils
(Soil information can be found using the NRCS Web Soil Survey at
1) NRCS Soil Map: See Appendix B
2) Soil Types: The following soil types and hydrologic groups are present within the project area of disturbance:
Table 2 – Soil Type
|Soil Symbol, Name, % Slope |Hydrologic Group |Texture |Character |Erosion Hazard |% within |
|Range |(HSG) | | |Potential |disturbed area |
|DeA, Deerfield complex, 3 |B |Loamy fine |Moderately well |*Slight |27.5% |
|to 8 percent slopes | |sand |drained | | |
|Ud, Udipsamments, dredged |A |Loamy sand or |Excessively drained |*Slight to |53.3% |
| | |sand | |moderate | |
|WnB, Windsor Complex, 3 to |A |Loamy sand |Excessively drained |*Slight |12.1% |
|8 percent slopes | | | | | |
|WnD, Windsor Complex, 15 to|A |Loamy sand |Excessively drained |*Severe |7.1% |
|25 percent slopes | | | | | |
(3) Discussion of Soil Characteristics and Soil Erosion Hazard Potential: There are three different soil series and two different hydrologic soil groups within the area of disturbance (AOD). The largest soil series within the project area is the Udipsamments soil, which is made up of material dredged from Saratoga Lake. It is typically loamy sand or sand with layers of silty material or gravel at varying depths. Depth to bedrock is greater than 60 inches and depth to seasonal groundwater is more than 6 feet. The Deerfield complex (DeA) makes up the next largest portion of the area of disturbance. It is a loamy fine sand formed on glacial outwash plains and terraces. It is very deep, moderately well drained and the topography within this series is generally undulating. Depth to bedrock is greater than 60 inches and depth to water table is between 1.5 and 3 feet. The Windsor complex contains the remaining two soil types, WnB and WnD with the first characterized by undulating terrain and the second hilly terrain. Both subseries are loamy sand, excessively drained and formed on glacial outwash plains, kames and terraces. Depth to bedrock is greater than 60 inches and depth to seasonal groundwater is more than 6 feet.
*(The erosion hazard indicated in the table above was originally a consideration for the forestry industry, and indicates the susceptibility of a particular soil to erode in a fully exposed condition. The Department is utilizing this information to indicate areas of the project which may be of critical concern to the contractor during storm events).
IV. Construction Phasing
1) Sequence of Construction Activities: The Contractor’s work schedule and methods shall be consistent with the SWPPP or amended SWPPP. Once approved, the progress schedule shall become a part of the SWPPP.
The following list is a suggested sequence of major construction activities for the project to meet the NYSDEC Phase II erosion control requirements:
1. Install erosion control measures at the beginning of construction.
2. Temporarily relocate Verizon and National Grid lines from the existing bridge to the lake bottom out of the way of construction operations. Permanently relocate the Saratoga County Sewer District’s force main from the existing bridge to the proposed location below the lake bottom. Remove existing underwater national grid electrical line from the lake bottom.
3. Prepare the existing boat launch parking area for temporary storage use.
4. Install temporary sheeting bulkheads in preparation for access from Route 9P to the lake. Set up construction barges and cranes as needed for demo of existing bridge and construction of new bridge.
5. Install permanent sheet piling at the existing boat launch dock. Clear and grub/remove trees from the existing approach embankments and build SPDES treatments, drainage, and sidewalks on the west side of the north approach. Install and maintain erosion control measures as needed.
6. After Labor Day holiday (September 6, 2010) implement detour route and close and demolish existing bridge superstructure and sub-structure. Bridge shall not be closed prior to September 7, 2010.
7. After bridge demo, install proposed piles and pier caps. Complete bridge abutments and miscellaneous sub-structure concrete work and closure pours as needed, temperature allowing.
8. Construct bridge approaches including precast modular wall units, all under drain and closed drainage, sidewalk/shoulder widening and utility conduits as needed.
9. Set steel beams and construct superstructure during winter time. Relocate utilities from their temporary location onto the new structure. Prepare for spring time deck and approach slab pours.
10. Pour concrete deck, approach and sidewalks and complete guide railing and any other miscellaneous approach work.
11. Complete sign installations and pavement markings prior to opening new bridge to traffic. New bridge shall be opened prior to May 27, 2011 for Memorial Day weekend.
12. Open bridge to traffic, remove temporary detour and complete landscaping.
13. When vegetation is established, remove silt fence and any other temporary erosion control measures that remain and clean out any sedimentation in the drainage pipes and swales. Reseed/repair any areas damaged during these activities.
V. Erosion and Sediment Control Measures
(Boilerplate)
1) Erosion Control Plan: An erosion control plan has been developed in accordance with the “New York Standards and Specifications for Erosion and Sediment Control”. The erosion control plan limits the amount of area exposed prior to stabilization, diverts drainage runoff from adjacent areas away from and around the construction site area, and employs various sediment control methods such as silt fence, vegetation protection barrier, check dams and turbidity curtains.
(Briefly describe all erosion control measures to be used)
Temporary Surface Stabilization: Areas within the project limits that may be disturbed more than once during the construction activities will be stabilized using temporary seed and mulch item or as directed by the Engineer. Area’s remaining unpaved for more than five (5) days during construction operations shall be stabilized temporarily. Other areas that might need to be stabilized temporarily will be at the discretion of the Engineer.
Check Dams: Check Dams will be installed in ditches/channels at various locations marked on the plans. The check dams in this project serve two functions: 1) Reduce erosion and limit sediment transport in a channel by reducing flow velocity in the channel and 2) Provide water quality treatment for roadway runoff. Proper inspection and maintenance of the check dams will be performed as specified.
Drainage Pipe Inlet/Outlet Stabilization: As part of the permanent erosion control measure, the inlet and outlet of the culvert pipes will be provided with either stone riprap apron or an apron consisting of erosion control product with vegetation to provide the required erosion control which blends in with the surrounding natural features and topography. The location and type of stabilization to be provided is shown on project plans.
Construction Entrance: If required, a stabilized construction entrance will be constructed to access the Contractors Staging/Storage Area. This entrance/area shall conform to the NYSDOT’s Standard Specifications and Standard Sheets.
Surface Stabilization: Stabilizing of the graded surfaces will be accomplished by using various seed mix for vegetation. The item for this work shall be progressed under Item 610.0203, Establishing Turf.
Dust Control: The contractor will be required to minimize dust generation during the construction activities. Provisions such as watering, the use of cover materials, and the application of calcium chloride have proven effective in dust control and can be approved by the Engineer for use in the affected areas.
Turbidity Curtain: Turbidity curtains will be placed as shown in the contract plans or as directed by the Engineer. The turbidity curtain shall be installed to meet the current water level conditions. The protection measure will remain in place during construction of the substructures and demolition of the existing bridge.
Tree/Vegetation Barrier: A protective fence will be erected as shown in the plans or around trees at the drip line to prevent during construction activities as ordered by the engineer.
Final Inspection: Prior to the project being finally accepted by the NYSDOT, it shall be inspected for any evidence of erosion or slope failure. If any such condition becomes apparent upon final inspection, temporary soil erosion and sediment controls shall be installed immediately as directed by the Engineer. The situation shall be corrected according to a schedule agreed to by the NYSDOT and the Contractor.
The Erosion Control Plans are included in Appendix C.
(List all permanent E&SC measures)
2) Permanent Erosion and Sediment Control Measures:
Table 3 – List of Permanent Erosion & Sediment Control Measures
|Permanent Feature |Converted Temporary Practice? |Location: ECP Plan #|Receiving Waterbody Protected( where |
| | | |applicable) |
|Dry swale w/ checkdams |No |ELP# 4 |Saratoga Lake |
(Boilerplate)
3) Installation Sequence: See the intended sequence of construction activites noted in Section IV above.
4) Maintenance Schedule: The Contractor is required to inspect and repair all E&SC devices once every seven (7) calendar days.
5) SWPPP Implementation Responsibilities: Implementation of all E&SC devices will be by the Contractor as indicated in the contract documents.
VI. Existing Watershed Information
1) Table of Receiving Waterbodies:
|Stormwater Structure |Receiving Waterbody |NYSDEC Regulated |
|Dry swale w/ checkdams |Saratoga Lake |Yes – Class A |
(Provide general description and characteristics of existing watersheds, including terrain/ slope, cover type(s), receiving waterbody, etc.)
2) Existing Watershed Information: The project straddles Saratoga Lake/Fish Creek which divides the project area into two separate drainage areas. The roadway pavement in the southern portion of the project area currently sheet flows off the roadway, down the embankment, to the relatively flat, adjacent land. On the east side of Route 9P, is a NYSDEC boat launch which consists of a large parking lot, surrounded by turf and intermittent tree plantings. On the west side of Route 9P, is the Point Breeze Marina which is also a mix of impervious pavement and areas of turf. Both of these areas sheet flow directly to Saratoga Lake. The area to the north of the bridge slopes up fairly steeply from the lake edge, with the area adjacent to the lake again a mix of impervious and turf with scattered mature trees. Moving away from the lake, the terrain steepens and the land use transitions to residential single family homes scattered within a largely forested area. The pavement in the northern portion of the project area drains to three separate drainage swales, which then drain to Saratoga Lake. Two of these drainage swales direct water to the east side of 9P while the third drains down the western side of 9P adjacent to the Bayshores and Tropic Hut properties. See the Existing Watershed Map in Appendix D for additional information.
The watershed area considered for this project is approximately 5.73 acres of which 3.89 acres are pervious and 1.84 acres are impervious.
VII. Green Infrastructure
(Include green infrastructure techniques to reduce the area of impervious cover)
1) Reduction of Impervious Cover:
|Reduction of Impervious Cover |
|Practice |Description |
|Travel lane width reduction |The travel lanes have been reduced to minimum width allowed, ____ft. |
|Shoulder width reduction |The shoulders have been reduced to minimum width allowed, ____ft. |
|Sidewalk width reduction |The sidewalks have been reduced to minimum width allowed, ____ft. Sidewalks have been |
| |limited to one side of the road. |
|Parking lot reduction |The parking lot has been reduced to ______ parking spaces, the minimum allowed for this type|
| |of facility. |
(Runoff reduction techniques include green infrastructure techniques to potentially reduce the contributing runoff area and volume)
2) Runoff Reduction Techniques:
100% of the Initial WQv is achieved thru Runoff Reduction (fill in Runoff Reduction Techniques table below)
Through the application of a combination of green infrastructure techniques and runoff reduction volume capable standard stormwater management practices, 100% of the Initial Water Quality volume has been reduced through the use of the following Runoff Reduction volume (RRv) techniques:
100% of the Initial WQv is not achieved thru Runoff Reduction (fill in Runoff Reduction Techniques table below):
Through the application of a combination of green infrastructure techniques and runoff reduction volume capable standard stormwater management practices, X% of the Initial Water Quality volume has been reduced through the use of the following Runoff Reduction volume (RRv) techniques:
|Reduction of Contributing Volume|Description |
|Practices | |
|Vegetated Swale |A _____ foot long vegetated swale on HSG ____, soils will provide a ___ % reduction in the |
| |Target WQv |
|Tree Planting / Tree Pits / | _____ acres of runoff drain by sheet flow from the developed area towards areas planted |
|Conservation of Existing Trees |with trees, resulting in ____ acres being subtracted from the target Water Quality Volume. |
| |_____ acres of runoff drain by sheet flow from the developed area towards an area of |
| |existing trees resulting in ____ acres being subtracted from the target Water Quality |
| |Volume. |
|Stormwater Planters |____ acre feet of runoff will be treated in rain gardens reducing the Water Quality Volume |
| |by ____acre feet. |
|Rain Gardens |____ acre feet of runoff will be treated in rain gardens reducing the Water Quality Volume |
| |by ____acre feet. |
|Infiltration Practice |____ acre feet of runoff will be infiltrated onsite, reducing the Water Quality Volume by |
| |____acre feet. |
VIII. Post Construction Stormwater Control Practices
1) Table of Post Construction Practices: See Table 3 above.
2) Post Construction Practices Plan: See Table 3 for location of Post Construction Practices and Appendix C for Dry Swale details.
3) Hydraulic Analysis of Stormwater Control Practices Including Pre-Development and Post-Development Conditions: The following table is a summary of the Watershed Physical Parameters for the proposed Stormwater Control Practices.
Table 4 - Stormwater Management Plan Summary
|Storm Event |Pre – Project runoff (cfs / m3/s) |Post – Project discharge from basin (cfs / |
| | |m3/s) |
|90% |0.54 / 0.0154 |0.06 / 0.0018 |
|1 |1.53 / 0.0432 |1.60 / 0.0454 |
|10 |2.81 / 0.0795 |3.86 / 0.1094 |
|100 |3.62 / 0.1024 |5.07 / 0.1437 |
|Area of disturbance |1.89 ac |
|**Water Quality Volume |0.0254 af / 1106 cf |
|**Water Quality Practice Volumes |Dry swale w/ checkdams: 0.0407 af / 1772 cf |
**See Appendix D for Water Quality Volume calculation.
4) Maintenance Schedule of Post-construction Stormwater Control Practices:
Table 5 – Maintenance Schedule of Post-Construction Stormwater Management Facilities
|Maintained by |Name of entity |Name of entity |
|Name, Address, Phone of Responsible Party | | |
|Facilities to be Maintained |Dry swale w/ checkdams | |
|Description of Maintenance |Mow annually. Remove sediment from behind | |
|Activity for each Facility and Frequency |checkdams as required. | |
|Description of Applicable Easements |n/a | |
|Description of funding source |NYSDOT maintenance or capital program funds| |
|Access and safety issues |NYSDOT maintenance forces have access to | |
| |all drainage facilities within the | |
| |right-of-way | |
|Testing and disposal of sediments |Responsibility of NYSDOT | |
|Local and non-local permits |n/a | |
|Legal agreements |n/a | |
APPENDIX A
Location Map
APPENDIX B
xxx County Soil Map
APPENDIX C
Erosion Control Plans
APPENDIX D
Hydrologic Analysis
APPENDIX E
Miscellaneous Forms
APPENDIX F
Cultural Resource Information
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