Upper Brushy 29 Repair-SWP3.pdf

UPPER BRUSHY CREEK WATERSHED

SITE 29 FLOODWATER RETARDING STRUCTURE

STORM WATER POLLUTION PREVENTION PLAN

SITE DESCRIPTION

Project Name and Location:

Upper Brushy Creek, Site No. 29, is located approximately 1 mile south of Taylor, Williamson County, Texas.

Latitude: 30o 31’ 30” Longitude: 97o 25’ 48”

Owner Name and Address: (Permanent)

Brushy Creek Water Control and Improvement District No. 1B 2207 Gladnell Taylor, Texas 76574

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 Upper Brushy Creek, Site 29 floodwater detention dam built in 1974, and replacing it with compacted lime-treated earthfill material and rebuilding the wave berm. The existing structure consists of a 230 feet long 24” R/C pipe principal spillway and 150’ wide auxiliary spillway. The dam is approximately 2,500 feet long and 37 feet high and controls runoff from approximately

2.5 sq. mi. of drainage area. The repair will involve excavating the downstream and upstream slopes from approximately stations 11+50 to 28+00.

The repair will require the estimated quantities of 19,600 cubic yards of excavation; 1,170 tons of lime; 19,700 cubic yards of lime-treated earthfill; 40,400 square yards of topsoil;

3,600 feet of sediment fence; and 6,800 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 waste materials; and grading, shaping, and replacing topsoil on the lime processing area.

SITE AREA

The site’s work limits are approximately 25 acres of which 15 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. Topsoil embankment and lime processing area

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

10. Final scarification of disturbed areas

11. Vegetation

NAME OF RECEIVING WATERS

Site 29 is located on Battleground Creek and confluences with Brushy Creek approximately 6 miles downstream. Brushy Creek is a tributary of the San Gabriel River.

Data provided by the U.S. Fish and Wildlife Service indicates that Williamson County is listed to provide habitat for several endangered species. However, the general area of site 29 and its construction does not pose a danger to these species.

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:

Petroleum Based Products Paint Plastics Lime

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.

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: ____________________________