01 57 13 Temporary Erosion and Sediment Control.pdf

Vaults 60, 87 & ET Structural Repair and Grating Replacement

3930 TEMPORARY EROSION AND SEDIMENT CONTROL

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SECTION 01 57 13

TEMPORARY EROSION AND SEDIMENT CONTROL

PART 1 - GENERAL

1.01 SUMMARY

A. Section Includes: General procedures and requirements for temporary erosion and sediment control (TESC) during construction.

B. Work shall consist of erosion prevention and sediment control on cut and fill operations, excavation, backfill, or other construction activities within limits of construction site, within temporary or permanent easements, and within borrow site used during period of construction. Protection of these sites shall continue throughout construction period.

C. Related Requirements:

1. Document 00 72 13, General Conditions – Construction Contract.

2. Document 00 73 13, Supplementary Conditions – Construction Contract.

1.02 SUBMITTALS

A. Informational Submittals:

1. When TESC Plan is included on Drawings, either adopt or modify TESC Plan. Provide schedule for TESC Plan implementation and incorporate it into Contractor’s progress schedule. Obtain Engineer’s approval of TESC Plan and schedule before the Work begins.

2. Modified TESC Plans shall meet requirements of applicable jurisdictions.

3. TESC Plan shall cover areas that may be affected inside and outside limits of the Project (including

Owner-provided sources, disposal sites, and haul roads, and nearby land, streams, and other bodies of water).

4. Allow at least 5 working days for Engineer to review original or revised TESC Plan. Failure to approve all or part of such Plan shall not make Owner liable to Contractor for Work delays.

1.03 GENERAL

A. During flood seasons, protect sites by diverting stormwater, sandbagging, pumping water, and other means appropriate to restrain flooding of Project Site and equipment.

B. Minimize erosion by phasing disturbances and/or by using straw, mulch, and other stabilizers where possible.

C. During dry weather, sprinkle sites with water, surfactants and/or other means to provide dust control.

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D. Ensure construction means and methods are performed in a manner that utilizes best management practices in conformance with applicable environmental laws, regulations, and approved permits, such as the NPDES Storm Water Construction Permit and the City of Knoxville Site Development Permit.

E. Contractor must be up to date with TDEC erosion and sediment control inspection forms submittals to Owner prior to submitting monthly Application for Payment. Owner may at Owners sole discretion suspend processing Application for Payment until up-to-date TDEC erosion and sediment control inspection forms submittals are correctly filled out and received by Owner.

PART 2 – PRODUCTS

2.01 TEMPORARY BERMS

A. Used temporarily at top or base of newly constructed slopes to prevent excessive erosion until permanent controls are installed or slopes stabilized.

2.02 TEMPORARY SLOPE DRAINS

A. Facility consisting of stone gutters, fiber mats, plastic sheets, concrete or asphalt gutters, half round pipe, metal pipe, plastic pipe, sod, or other material that may be used to carry water down slopes to reduce erosion.

2.03 SEDIMENT STRUCTURES

A. Sediment basins, ponds, and traps are prepared storage areas constructed to trap and store sediment from erodible areas to protect properties and stream channels below construction areas from excessive siltation.

2.04 CHECK DAMS

A. Barriers composed of large stones, sandbags, or other noncorrodible materials placed across or partially crossing a natural or constructed drainway.

2.05 TEMPORARY SEEDING AND MULCHING

A. Measures consisting of seeding, mulching, fertilizing, and matting used to reduce erosion. Cut and fill slopes including waste sites and borrow pits shall be seeded when and where necessary to eliminate erosion.

2.06 TEMPORARY SILT FENCES

A. Temporary sediment barriers consisting of filter fabric stretched across and attached to supporting posts and entrenched. Silt fence is constructed of synthetic filter fabric, posts, and depending upon strength of fabric used, wire fence for support. Filter barrier is constructed of stakes and burlap or synthetic filter fabric in accordance with TDEC Specifications SF-1 through SF-8.

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PART 3 – EXECUTION

3.01 PROJECT REVIEW

A. Follow the SWPPP developed by design engineer and approved by applicable regulatory agencies. If at any time Owner deems it necessary or if Contractor observes problems during Site inspections, Contractor shall provide additional erosion prevention and sediment control devices and mark changes on applicable SWPPP. The Site shall be provided with maximum protection from erosion at all times.

3.02 GENERAL

A. Coordinate temporary measures with permanent erosion prevention and sediment control features, to ensure economical, effective, and continuous erosion prevention and sediment control throughout construction and post-construction periods.

B. Installation, inspect, and maintain required erosion prevention and sediment control required as part of the Work.

C. For projects covered under TDEC’s General NPDES Permit for Discharges of Storm Water Associated with Construction Activities (such as, projects greater than one acre and/or part of the Pace 10 or Century II water programs), the following specific requirements apply:

1. Certification for sediment and erosion control inspectors must be included in onsite Storm Water Pollution Prevention Plan (SWPPP). Therefore, Contractor will include copies of certifications for sediment and erosion control inspectors in submittal package, in accordance with requirements in Section 2.5.8.1 of TDEC’s General NPDES Permit for Discharges of Storm Water Associated with Construction Activities.

2. Owner will provide copy of Project SWPPP or SWPPP as submitted for approval for Contractor to review. Contractor will review and sign on to Project’s Notice of Intent (NOI). Signature indicates that Contractor understands and will adhere to erosion prevention and sediment control requirements outlined in the SWPPP.

3. Contractor will be solely responsible for payment of fines or penalties from regulatory agency enforcement due to notice of noncompliance for storm water discharges.

4. Submit completed TDEC erosion and sediment control inspection forms to Owner.

5. Completed forms for given month must be submitted electronically by fifth day of following month.

Forms will be submitted by e-mail to ErosionControl@kub.org. Completed inspection forms shall be submitted in Adobe pdf format.

3.03 CONSTRUCTION REQUIREMENTS

A. In the event of conflict between these requirements and pollution control laws, rules, or regulations, or other Federal, State, or Local agencies, the more restrictive laws, rules, or regulations shall apply.

B. In streets and other paved areas, remove excavated material from the Site as construction progresses to prevent erosion of this material.

mailto:ErosionControl@kub.org

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C. In other areas, place excavated material so as not to block drainage areas. Replace excavated material in trench immediately after Work has been completed and approved by Owner.

D. Dispose of excavated materials that cannot be re-used in accordance with applicable laws and regulations and with Section 31 23 16, Excavation.

E. Retain natural vegetation whenever feasible.

F. Restore and cover exposed areas subject to erosion as quickly as possible by means of seeding and mulching. Where earth-disturbing activities have ceased permanently or will not be resumed for period exceeding 14 days, stabilization measures must be implemented as soon as possible, but in no case later than 14 days after earth-disturbing activities have ceased. Use diversion ditches or other methods to prevent storm water from running over exposed area until seeding is established as specified. Fiber matting or other stabilizing materials may be necessary as required by Owner.

G. Take particular care along streams and drainage ditches so that fallen trees, debris, and excavated material will not adversely affect streamflow. Exercise care to minimize destruction of streambanks.

Wherever streambanks are affected by construction, reduce slope of streambanks to provide suitable condition for vegetative protection. Minimize land exposure in terms of area and time.

H. Take care during placing of concrete and hauling of materials to keep vehicles from creating severe erosion problem. Proper scheduling of operations and prompt repair of ruts created during this operation is necessary.

I. When working in TDOT R.O.W., Contractor should notify TDOT of erosion prevention and sediment control intentions to eliminate watershed and sediment diversions onto roadway.

3.04 CONSTRUCTION OF STRUCTURES

A. Most up-to-date Best Management Practices (BMPs) from TDEC and City of Knoxville should be followed.

3.05 MAINTENANCE

A. Maintain TSEC features until no longer needed or permanent erosion prevention and sediment control methods are installed. Temporary erosion prevention and sediment control materials shall be moved and become property of Contractor.

3.06 EROSION PREVENTION AND SEDIMENT CONTROL OUTSIDE PROJECT AREA

A. Temporary pollution control shall include construction work outside Project area where such work is necessary because of construction such as borrow pit operations, haul roads, and equipment storage sites.

END OF SECTION