Chambers 75B Repair-SWP3.doc

CHAMBERS CREEK WATERSHED

SITE 75B FLOODWATER RETARDING STRUCTURE

STORM WATER POLLUTION PREVENTION PLAN

SITE DESCRIPTION

Project Name and Location:

Chambers Creek, Site No. 75B, is located approximately 5 miles southwest of Maypearl, Ellis County, Texas.

Latitude: 32o 15’ 45”

Longitude: 97o 02’ 54” Owner Name and Address: (Permanent)

Ellis –Prarie SWCD 1822 FM 66 , Suite 102 Waxahachie, Texas 75167 Owner Name and Address: (During Construction)

USDA, Natural Resources Conservation Service

101 South Main

Temple, Texas 76501

DESCRIPTION

This project will consist of repairing the embankment slopes of Chambers Creek, Site 75B floodwater detention dam built in 1972, and replacing it with compacted lime-treated earthfill material. An impact basin, crossing berm and a wave protection riprap berm will also be added. The existing structure consists of a 260 feet long 36” I.D. prestressed, concrete lined pipe principal spillway and 300’ wide auxiliary spillway. The dam is approximately 2,250 feet long and 40 feet high and controls runoff from approximately 9.6 sq. mi. of drainage area. The repair will involve excavating the downstream and upstream slopes from approximately stations 7+50 to 27+00 and building of rock riprap wave berm from approximate stations 11+50 to 22+00.

The repair will require the estimated quantities of 51,800 cubic yards of excavation; 2,200 tons of lime; 36,600 cubic yards of lime-treated earthfill; 5,200 cubic yards of compacted earthfill; 1,700 tons of R-150 riprap; 400 tons of R-300 riprap; 2,800 square yards of geotextile; 15,500 square yards of topsoil; 2,600 feet of sediment fence; and 7,900 linear feet of barbed wire fence.

Soil disturbing activities will include: clearing and grubbing; stripping the lime processing area and the embankment; constructing the access road; processing removed embankment soils with lime; placing lime-treated earthfill on the embankment; disposing of concrete and waste materials; and grading, shaping, and replacing topsoil on the lime processing area.

SITE AREA

The site’s work limits are approximately 42.6 acres of which 9.4 acres will be disturbed by construction activities and will require re-vegetating.

SEQUENCE OF MAJOR ACTIVITIES

The order of activities will be as follows:

1.

Construct access and construction campsite and remove fences.

2.

Construct surface water control measures 3.

Site preparation and stripping 4.

Embankment excavation 5.

Reconstruct wave berm with compacted earthfill

6.

Process the earth materials with lime

7.

Reconstruct embankment with the lime-treated earthfill

8.

Install pipe joints and impact basin 9.

Construct crossing berm

10.

Topsoil embankment and lime processing area

11.

Construct rock riprap berm

12.

Final shaping and grading including removal of water control measures 13.

Final scarification of disturbed areas 14.

Temporary vegetation

NAME OF RECEIVING WATERS

Site 75B is located on Valley Branch, a tributary of Chambers Creek. Valley Branch flows into the South Fork Chambers Creek approximately 2.5 miles from the dam. Approximately 5 miles downstream, South Fork Chambers Creek confluences with North Fork Chambers Creek and become the main Chambers Creek which flows into the upper portion of Richland-Chambers Reservoir.

There are no wetlands or other aquatic sites at or near the site that will be disturbed or which will receive discharges from disturbed areas of this project.

Data provided by the U.S. Fish and Wildlife Service indicates that there are no endangered species or critical habitat in the proximity of the construction site.

There are no properties listed or eligible for listing on the National Register of Historic Places in the vicinity of the work area.

CONTROLS

EROSION AND SEDIMENT CONTROL

STABILIZATION PRACTICES

Temporary Stabilization - The average annual rainfall in the area is approximately 36 inches. Sediment filters (filter fabric sediment fences) and diversions will be used as needed during construction to help stabilize disturbed areas. Sediment filters are to be provided along the downstream boundary of any area which is stripped of vegetation during any phase of construction. Sediment filters are also to be provided on the downstream side of any soil material which is stockpiled for more than 14 days. All disturbed areas shall be hay mulched after seeding of temporary vegetation. After borrow operations are completed or as soon as practicable after temporary activity has ceased in an area it will be scarified as required in the specifications. All excavated slopes within the limits of the borrow area shall be maintained to be no steeper than 1:1 except that the final side slopes of all borrow areas shall be dressed and be no steeper than 4:1. Excavated slopes where the existing stream channel(s) enter the borrow area shall be dressed to be no steeper than 10:1.

The construction ingress and egress will be stabilized with gravel or other stabilization materials to prevent the tracking of mud onto public streets by vehicles leaving the construction site.

All pollution control measures will be maintained in a functional condition as long as needed during the construction operation.

Permanent Stabilization - All slopes cut in soil, earthfill slopes and disturbed areas will be protected against riling and erosion by vegetation. Diversions will be constructed to direct the runoff away from the processing area. Topsoil will be placed on the embankment and the lime processing area to facilitate vegetation establishment.

Structural Practices – No structural measures are anticipated for erosion and sediment control.

STORM WATER MANAGEMENT

Storm water runoff from the construction area will be filtered with sediment fences or other measures as needed around the excavation areas, embankment, stockpiles, campsite and other disturbed areas as described above for EROSION AND SEDIMENT CONTROL. Where construction roads cross low areas subject to concentrated storm water flow, culverts will be installed.

OTHER CONTROLS

WASTE DISPOSAL

Waste Materials:

All organic materials from the site preparation and clearing and grubbing operations will be either chipped and used on site for mulch, burned onsite or disposed of offsite in accordance with all state and local regulations. If the materials are burned onsite, the residues will be buried in the waste areas. All inorganic materials from the site preparation will be disposed of by burying in the waste areas and covering with a minimum of 3 feet of soil. All trash and construction debris will be collected and disposed of offsite.

Hazardous Waste:

All chemical and hazardous waste materials will be disposed of offsite in accordance with local or state regulations or as recommended by the manufacturer.

Sanitary Waste:

All sanitary waste will be collected from portable units and disposed of in accordance with applicable regulations.

Dust Control:

Dust will be controlled on all haul roads and access roads by sprinkling with water.

CERTIFICATION OF COMPLIANCE WITH FEDERAL, STATE AND LOCAL REGULATIONS

All local and State regulations will be adhered to concerning the burning of organic materials or disposal of organic, chemical, and sanitary waste. The Texas Commission of Environmental Quality (TCEQ) has issued Texas Pollutant Discharge Elimination System (TPDES) permits for storm water discharges for construction activities under Section 402(p) of the CWA. There is no other applicable State or Federal requirements for sediment and erosion site plans or storm water site management site plans.

MAINTENANCE AND INSPECTION PROCEDURES

The Contractor, __________________________, will be responsible for intermittent review and inspection of the operation and maintenance of all pollution control measures throughout the life of the contract. Inspection of the conditions and the need for repair shall be made after each storm rainfall exceeding 0.5 inch. Daily inspections of the need for cleanup of chemical spills and sanitary facilities will be performed.

Routine inspection of disturbed areas, storage areas, stockpiled materials, traffic areas, and the silt fences shall be made every fourteen (14) days.

A maintenance inspection report will be made after each inspection. The report will be documented in the contractor's and the project engineer's daily job diary maintained on the job. The report will be prepared in accordance with Part III of the general permit.

The job diary will document the dates when major grading activities occur, the dates when construction activities temporarily or permanently cease on a portion of the site, and the dates when stabilization measures are initiated. Each report will be attached to the Storm Water Pollution Prevention Plan (SWP3) and remain with the SWP3 on site. Each report will be retained as part of the SWP3 for at least three (3) years from the date the site is finally stabilized.

The SWP3, a copy of the permit or permit language, and all inspection reports shall be available at a central location on site for the use of all those who have responsibilities under the SWP3.

NON-STORM WATER DISCHARGES

It is expected that the following non-storm water discharges may occur from the site during the construction period:

Water for dust control Water for adjustment of moisture in earthfill operations

Water for adjustment of moisture in lime-treated earthfill operations

INVENTORY FOR POLLUTION PREVENTION PLAN

The following list of materials or substances are expected to be present during construction:

Chemical Fertilizers

Concrete

Concrete Air-Entraining Admixtures

Concrete Water-Reducing and Set-Retarding Admixtures

Concrete Joint Sealer

Curing Compound for Concrete

Lime

Paint

Petroleum Based Products

Plastics

Portland Cement

Reinforced Steel

Wood and Lumber

SPILL PREVENTION

MATERIAL MANAGEMENT PRACTICES

The following are the Material Management Practices that will be used to reduce the risk of spills or other accidental exposure of materials and substances to storm water runoff:

GOOD HOUSEKEEPING

The following good housekeeping practices will be followed onsite during construction project.

An effort will be made to store only enough product required to do the job.

All materials stored onsite will be stored in a neat, orderly manner in their appropriate containers and, if possible, under a roof or other enclosure.

Products will be kept in their original containers with the original manufacturer's label.

Whenever possible, all of a product will be used up before disposing of the container.

Manufacturers' recommendations for proper use and disposal will be followed.

The Contractor's job superintendent will be responsible for the proper use, storage, and disposal of materials onsite.

HAZARDOUS PRODUCTS

These practices will be used to reduce the risks associated with hazardous materials.

Products will be kept in original containers unless they are not resealable.

Original labels and materials safety data will be retained.

If surplus product must be disposed of, manufacturers' or local and State recommended methods for proper disposal will be followed.

PRODUCT SPECIFIC PRACTICES

PETROLEUM PRODUCTS:

All onsite vehicles 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. The storage and dispensing of all petroleum products will be in accordance with part 1926.152 of the OSHA Construction Industry Safety and Health Standards. All spills of petroleum products will be cleaned up within 7 days. All contaminated soils will be removed from the site and disposed of in accordance with State and local regulations.

PAINTS:

All containers will be tightly sealed and stored when not required for use. Excess paint will not be disposed of onsite, but will be disposed of in accordance with manufacturers' instructions or State and local regulations.

CONCRETE TRUCKS:

Concrete trucks will discharge all surplus concrete at a designated location. After all concrete has been placed the surplus concrete will be buried in an approved site and covered with a minimum of 3 feet of soil. The wash water from the concrete trucks will be discharged into a lined pit. The pit will be emptied at the completion of construction and disposed of in accordance with State and local regulations. The pit will be filled and graded to match the adjacent ground surface.

SPILL CONTROL PRACTICES

In addition to the good housekeeping and material management practices discussed in the previous sections of this plan, the following practices will be followed for spill prevention and cleanup:

Manufacturers' recommended methods for spill cleanup will be followed.

All spills of hazardous materials will be cleaned up immediately after discovery.

Spills of toxic or hazardous materials will be reported to the appropriate State or local government agency.

Contractor, , will be responsible for spill prevention and cleanup.

STORM WATER POLLUTION PREVENTION PLAN CERTIFICATION

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 significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

DONALD W. GOHMERT

Date State Conservationist

USDA, Natural Resources Conservation Service

Temple, Texas

CONTRACTOR CERTIFICATION

I certify under penalty of law that I understand the terms and conditions of the general Texas Pollutant Discharge Elimination System (TPDES) permit that authorizes the storm water discharges associated with industrial activity from the construction site identified as part of this certification. I also understand that I am responsible for all on site requirements of the Storm Water Pollution Discharge Plan.

Name: _______________________

Date:

Title: ________________________ Firm: ________________________ Address: ______________________

Phone: _______________________

SUBCONTRACTOR CERTIFICATION

I certify under penalty of law that I understand the terms and conditions of the general Texas Pollutant Discharge Elimination System (TPDES) permit that authorizes the storm water discharges associated with industrial activity from the construction site identified as part of this certification.

Name: ______________________________ Date: ______________ Title: ______________________________ Firm: ______________________________

Address: ____________________________

Phone: ____________________________

Name: ______________________________ Date: ______________ Title: ______________________________

Firm: ______________________________ Address: ____________________________

Phone: ____________________________