Stormwater

Tolman Engineering has extensive experience with feasibility assessments, planning, design, permitting, construction and construction oversight of stormwater management systems. As part of our municipal engineering practice we have designed various drainage projects from very small to vary large. We have successfully completed drainage and other engineering projects for over a decade for a number of clients which exemplifies our competence and client driven focus. We have the experience, technical expertise, commitment to excellence and resources to provide outstanding and timely service. Provide below is a brief summary for a number of stormwater projects completed by Tolman Engineering staff.   

Village of Fredonia – University Drainage Project

Evaluation of S.U.N.Y. College at Fredonia’s existing storm drainage system capacity with EPA SWMM.  Evaluation of the feasibility of connecting a proposed drainage system to SUNY Fredonia’s existing drainage system.  Detailed investigation of the hydrologic and hydraulic components of the existing and proposed drainage systems.  Checked existing, proposed, and future SWMM stormwater model with Pondpack to verify results.  Creation of a report for review and approval of the proposed drainage project by SUNY Fredonia and NYS Dept. of State. Developed design drawings and contract documents for public bidding to contractors.  Completed construction contract administration including change orders, pay applications, submittal review, etc.  Provided construction oversight and supervision of contractor during construction.  Provide construction oversight and assistance to Village of Fredonia’s forces during construction.
 
Facilities designed included approximately 700 linear feet of 42” CPP storm main, 520 linear feet of 30” CPP storm main, 3,000 linear feet of 24” CPP storm main, 2,220 linear feet of 18” CPP storm main, and 1,040 linear feet of 12” CPP storm main. The total construction project is estimated to be over $1.2 million.  A portion of the project was constructed by a private contractor and a portion was completed by Village of Fredonia’s forces.   

Cummins Jamestown Engine Plant Site Improvements

Designed trailer parking area, parking lot expansion, new truck road, and stormwater management (drainage) facilities.  Design included a wet pond, micro-pool extended detention pond, new closed drainage system, and open channels.  Performed hydrologic and hydraulic analysis of existing site drainage system including modeling existing detention  ponds. Performed stormwater modeling for post construction stormwater management, including removal of existing ponds. Worked with subconsultant to perform wetland delineation and obtain Army Corps of Eng. jurisdictional determination.  Evaluated potential alternatives and refined selected design to minimized wetland disturbance.  Worked with subconsultant to develop Wetland Mitigation Plan and obtain Army Corps of Engineers Wetland Permit.  Completed a Stormwater Pollution Prevention Plan and obtained NYSDEC SPDES Permit for Stormwater Discharge.  Created construction drawings and details for use by Cummins in obtaining bids from private contractors.  Provided construction oversight and addressed contractors and owners questions during construction.  Provided weekly erosion and sediment control inspections and generated inspection reports for site log book.
 
Facilities designed included 272,000 gallon wet pond, 1.4 million gallon micro-pool extended detention pond, 120 linear feet of 48” CPP storm main, 380 linear feet of 42” CPP storm main, 270 linear feet of 30” storm main, 900 linear feet of 24” CPP storm main, 625 linear feet of 15” CPP storm main, 540 linear feet of 12” CPP storm main, 80 linear feet of 36” diameter road culvert, and approximately 880 linear feet of open channel. The total cost of the project is estimated to be over $2 million.  Construction contract administration was completed by Cummins, therefore actual cost is unknown.

Village of Lakewood – Chautauqua Avenue Reconstruction

Road reconstruction including relocating utilities, installation of a clock tower, retaining walls, traffic light and signage.  Designed new road, driveway entrances, sidewalks, parking areas, utilities, retaining walls, clock tower, and traffic light.  New utilities included underground electric, water main, bore under railroad tracks, and a closed drainage system.  Coordinated underground relocation of existing utilities with utility companies.  Worked with Architect and community to develop historic streetscape plan including a landscape plan.  Created cost estimates that were used to determine the funding needed to complete the project.  Completed an Engineering Report and obtained Department of Health Approval for the proposed water main.  Developed contract documents (drawings and specifications) for public bidding to private contractors.  Completed construction contract administration including change orders, pay applications, submittal review, etc.  Provided construction oversight and supervision of contractor during construction. 
 
Facilities designed included approximately 2,800 linear feet of road reconstruction, 2,337 linear feet of closed drainage system, 2,830 linear feet of 8-inch water main, 100 linear feet of cased road bore, 12,370 linear feet of underground electrical conduit, and 5,600 linear feet of underdrain.  The total cost of the project was approximately $2.3 million 

Warren County Chamber of Business & Industry – Brokenstraw Industrial Park

Designed a green field industrial park with an access drive, utilities, and stormwater management facilities (ready for development).  Coordinated a wetland delineation and jurisdiction determination (only PADEP regulated the project area wetland).  Met with PA Department of Environmental Protection who establish wetland detention policy based on project.  Completed Pennsylvania Natural Diversity Inventory (PNDI) Project Environmental Review.  Coordinated geotechnical investigation to classify on-site soils and infiltration rates.  Designed access drive and maximum impervious area for industrial lot development.  Designed drainage system including an infiltration basin and vegetated drainage swales.  Completed an Erosion and Sediment Control Plan and a Post Construction Stormwater Management Plan.  Obtained a National Pollutant Discharge Elimination System (NPDES) General Permit.  Obtained a Pennsylvania Department of Transportation Highway Occupancy Permit.  Obtained a PA Department of Environmental Protection Minor Road Crossing (GP-7) General Permit.  Developed design drawings, details, technical specifications, and probable cost estimate. 
 

Facilities designed on the 32 acre project site included approximately 500 linear feet of access drive, 1,060 linear feet of vegetative drainage swales, 340 linear feet of storm main, and a 1.03 million gallon infiltration basin.  The total cost is approximately $450,000.

R.W. Larson Architects – Community Eye Care Building & US Forest Service Office Building

Provided site design for new Community Eye Care building and new US Forest Service Office building in two phases.  Designed grading, pavement, sewerage system, drainage system and infiltration and detention (stormwater) basin.  The stormwater basin provides water quality treatment, provides groundwater recharge, and controls peak runoff rates.  Designed permanent erosion and sediment control measures on steep cut slope and pond inlets.  Created Post Construction Stormwater Management Plan and Erosion and Sediment Control Plan to PADEP requirements.  Coordinated geotechnical investigation to determine on-site soil types and infiltration rates.  Completed Pennsylvania Natural Diversity Inventory (PNDI) Project Environmental Review.  Obtained a National Pollutant Discharge Elimination System (NPDES) General Permit.  Obtained Pennsylvania Department of Transportation Driveway Permit.  Obtained approval of Conewango Township (i.e. design conformed to Township’s Stormwater Management Ordinance).  Performed hydrologic and hydraulic modeling of proposed drainage system to ensure adequate flow capacity.  Created construction drawings and details for use in obtaining bids from private contractors.   
 
Facilities designed on the 6.3 acre project site included 429,000 gallon infiltration/detention basin, approximately 1,320 linear feet of storm main ranging in size from 18-inch to 12-inch in diameter, and approximately 510 linear feet of grass drainage swale.  The work was completed as a subconsultant to an Architect, as such the actual construction cost is not known (most likely over $6 million dollars).

Special Metals Corporation – Site Stormwater Improvements

Performed on-site investigation of underground drainage system including coordination of video inspection. Developed Stormwater Pollution Prevention Plan for a project classified as “redevelopment”.   Designed stormwater drainage system including a Vortechs Model 2000 Stormwater Treatment System.  Obtained NYSDEC SPDES Permit for Stormwater Discharge from Construction Activity.  Completed presentation to NYSDEC, City of Dunkirk, Chautauqua County, and adjacent property owners.  Completed preliminary cost estimates of alternative designs for stormwater project selection by owner.  Designed two underground stormwater pumping stations and associated stormwater forcemain.  Performed hydrologic and hydraulic stormwater modeling of the existing and proposed drainage systems.  Developed a Stormwater Engineering Report that was submitted to and approved by the City of Dunkirk.  Obtained R.O.W. Occupancy Permit from Chautauqua County Department of Public Facilities.  Developed contract documents for bidding to private contractors and reviewed construction submittals.  Provided weekly erosion and sediment control inspection and construction duration inspection.
 
Facilities designed on the 8.3 acre project site included approximately 1,450 linear feet of gravity storm main, 700 linear feet of stormwater forcemain, 5,540 GPM stormwater pump station, and 2,080 GPM stormwater pump station.  The total cost is approximately $500,000. 

Flynn Battaglia Architects – SUNY Fredonia Community Daycare

Designed site grading, parking area, access drive, sidewalk, sanitary sewer, and stormwater management (drainage) facilities.  Performed stormwater modeling for existing conditions and proposed conditions stormwater runoff.  Coordinated geotechnical investigation to classify soil types and determine on-site infiltration rates.  Designed underground infiltration system including pre-treatment system to ensure long-term performance of infiltration.  Pre-treatment consists of an isolator filter row, floatables trap, deep sumps, vegetative swale, and vegetative filter strip.  Worked with Architect to obtain Leadership in Energy and Environmental Design (LEED) Certification for project.  Reviewed project area for registered state or national historic places and any potential impact by project.  Completed a Stormwater Pollution Prevention Plan and obtained NYSDEC SPDES Permit for Stormwater Discharge.  Created construction drawings, details, and technical specifications for use in obtaining bids from private contractors.  Designed was reviewed and approved by State University of New York, College at Fredonia.  Performed drafting services for the completion of a landscape plan drawing designed by a Landscape Architect.  Provided construction oversight, weekly erosion and sediment control inspections, and submittal review.
 
Approximately 14,000 SQFT building, 3.5 acre project site, 39,000 gallon underground infiltration system, 1,480 linear feet of storm main, and 365 linear feet of drainage swale.  The total cost of the daycare project is $4.0 million 

Town of Busti – Huntington Wood/Shadow Creek Subdivisions

Provided stormwater management design for Huntington Woods and Shadow Creek subdivision.  Created a map, plan, and report for the establishment of a drainage district for the project.  Performed field investigation to verify drainage patterns and watershed areas.  Performed stormwater modeling of the existing and proposed drainage system to comply with permit requirements.  Designed two off-line micro-pool extended detention ponds that work together to control peak stormwater runoff.  Designed relocated stream channel and obtained Nationwide Permit from Army Corps of Engineers.  Designed temporary diversion ditch and permanent cutoff ditch for phased construction.  Created a Stormwater Pollution Prevention Plan and obtained a SPDES General Permit from NYSDEC.  Designed stormwater plan and erosion and sediment control plan to account for four phased construction.  Created construction drawings, details, and technical specifications for use by developers contractor during construction.  Complete weekly erosion and sediment control inspections and generated required reports during construction of ponds.
 
Drainage area = 148 acres, total project site = 51 acres, Pond 1 = 252, 000 gallons, Pond 2 = 1,033,000 gallons, approximately 250 linear feet of relocated stream channel, approximately 400 linear feet of temporary diversion ditch, and approximately 1,661 linear feet of cutoff ditches.  The cost of the stormwater management facilities are estimated at $250,000.  

Town of Hanover – Rider Road Culvert Replacement

Performed a hydrologic analysis of the watershed using PondPack, a stormwater modeling software package.  Performed hydraulic analysis using the procedures in the Federal Hydraulic Design of Highway Culverts manual.  Evaluated potential alternative designs based on FEMA and SEMO requirements for funding.  Created engineering report for review and approval of culvert replacement project by FEMA and SEMO.  Completed a preliminary construction cost estimate to receive project funds from FEMA and SEMO.  Designed replacement culvert based on no increase to the 100-year flood water elevation.  Designed erosion and sediment control measures, access drive, retaining walls, and road closure plan.  Obtained permits from the U.S. Army Corps of Engineers and the NYS Department of Environmental Conservation.  Developed contract documents (drawings and specifications) for public bidding to contractors.  Completed construction contract administration including change orders, pay applications, submittal review, etc.  Insured compliance with FEMA and SEMO contract requirements during construction.  Provided construction oversight and supervision of contractor during construction.
 
Facilities designed included 168 linear feet of 84” diameter reinforced concrete pipe with approximately 25-feet of soil cover. Watershed (drainage) area is approximately 341 acres. The total cost of the project was approximately $450,000.00.

United Refinery Company – Truck Stacking and Site Improvements

Redeveloped existing residential and commercial property to provide new office space and truck staging area. Designed layout for new truck staging area, parking areas, access drives, driveways, and drainage system. Designed an underground oil/water separator and an up-stream stormwater by-pass chamber. Performed hydrologic and hydraulic modeling of proposed drainage system to select pipe size for 25-Yr 24-Hr storm.  Perform on-site investigation to obtain existing information vital to the proper design of the project.  Created an Erosion and Sediment Control Plan to comply with the PA Erosion and Sediment Pollution Control Manual.  Obtained Pennsylvania Department of Transportation Highway Occupancy Permit.  Obtained approval from the City of Warren to replace existing catch basin and remove existing parking area on street.  Created construction drawings and details for use by United Refining in obtaining bids from private contractors.

Facilities designed on the 4.7 acre project site included 3,000 GPM oil/water separator, approximately 430 linear feet of 30-inch CPP storm main, 400 linear feet of 24-inch storm main, 193 linear feet of 18-inch storm main, 216 linear feet of 15-inch storm main, and 926 linear feet of 12-inch storm main.  The total construction cost of the project is approximately $2.1 million.