4-City of Alamo DSR-5042-009 RFP-Appendix B Drawings.pdf

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COVER SHEET AND SITE DETAILS

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CULTURAL RESOURCES PROTECTION NOTES

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EMERGENCY WATERSHED PROTECTION PROGRAM

THE CITY OF ALAMO, GEORGIA - HURRICANE HELENE

DSR 13-08-24-5042-009

CLEARING & SNAGGING

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SHEET: 1 OF 9

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DWG: SITE:

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PROJ: DSR-5042-009

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DATE: 08 / 2025

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PRE-CONSTRUCTION CERTIFICATION:

THE CITY OF ALAMO STORM DEBRIS REMOVAL PROJECT WILL BE CONSTRUCTED IN ACCORDANCE WITH THE FOLLOWING DRAWINGS AND PRACTICE CODES 326, 484 AND 342. ALL ADDITIONS OR CHANGES HAVE BEEN APPROVED BY NRCS.

CITY SIGNATURE DATE

NRCS SIGNATURE DATE

AS-BUILT CERTIFICATION:

THE CITY OF ALAMO STORM DEBRIS REMOVAL PROJECT HAS BEEN CONSTRUCTED IN ACCORDANCE WITH THESE PLANS AND MEETS NRCS STANDARDS AND SPECIFICATIONS.

CITY SIGNATURE DATE

NRCS SIGNATURE DATE

08/2025

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CITY OF ALAMO, GEORGIA

DSR 13-08-24-5042-009

CLEARING & SNAGGING

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Text Box NO WORK SHALL OCCUR OUTSIDE OF THE BUFFER AREAS. BUFFER AREAS ARE WITHIN 25' OF EITHER SIDE OF STREAM.

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PROJECT NOTES:

1. ALL WORK MUST BE CONDUCTED IN ACCORDANCE WITH NRCS CONSERVATION PRACTICE STANDARDS 326 CLEARING AND SNAGGING, 484 MULCHING AND 342 CRITICAL AREA PLANTING.

2. METHODS TO REMOVE FLOW OBSTRUCTION INCLUDE SAWING, CABLING, WINCHING, LIFTING, OR DRAGGING. EQUIPMENT USED WILL GENERALLY INCLUDE HYDRAULIC EXCAVATORS EQUIPPED WITH MECHANICAL THUMB OR GRAPPLE ATTACHMENT, LOADERS, WINCHES MOUNTED ON TRACKED OR RUBBER-TIRED EQUIPMENT, PORTABLE WINCHES, AND CHAIN SAWS. NO EQUIPMENT WILL BE PERMITTED WITHIN THE STREAM. ALL EQUIPMENT WILL OPERATE FROM BEYOND THE TOP OF THE STREAM BANKS.HEAVY EQUIPMENT WORKING IN WETLANDS MUST BE PLACED ON MATS OR OTHER MEASURES MUST BE TAKEN TO MINIMIZE SOIL DISTURBANCE. MECHANIZED LAND CLEARING WILL NOT OCCUR WITHIN WETLANDS AT ANY TIME.

3. DO NOT REMOVE TREES FROM THE STREAM CHANNEL THAT WERE DEPOSITED PRIOR TO THE STORM EVENT AND ARE IN AN ADVANCE STAGE OF DECAY. ONLY TREE STUMPS COMPLETELY UPROOTED BY THE STORM EVENT ARE TO BE REMOVED. SNAGS ARE TO BE CUT OFF AT STUMP LEVEL AND REMOVED. STUMPS FROM SNAGS WILL REMAIN IN PLACE.

4. DEBRIS FROM PROJECT AREAS SHALL BE DISPOSED BY CONTRACTOR.

5. DAMAGE TO ADJACENT STREAM AREAS SHALL BE KEPT TO A MINIMUM DURING CLEARING AND SNAGGING OPERATIONS. ALL DAMAGED AREAS SHALL BE STABILIZED CONCURRENT WITH LAND DISTURBING ACTIVITIES.

6. BEST MANAGEMENT PRACTICES SHALL BE EMPLOYED DURING THE OPERATION TO AVOID STREAM BANK EROSION AND SEDIMENTATION RUN OFF INTO THE STREAM.

7. THE CLEARING AND SNAGGING OPERATIONS SHALL BE CONFINED TO 25 FEET FROM THE TOP OF BANK ON EACH SIDE OF THE STREAM (DISTANCE VARIES).

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TRIBUTARY AT OXFORD STREET

PLAN VIEW

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Text Box Site 1 (a) Tributary at Oxford Street 32.1522519, -82.779131

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BUFFER AREA FOR CLEARING & SNAGGING

(~25' on both sides of stream channel)

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SHEET: 2 OF 9

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PROJ: DSR-5042-009

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DATE: 08 / 2025

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CITY OF ALAMO, GEORGIA

DSR 13-08-24-5042-009

CLEARING & SNAGGING

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SITE ACCESS / CONSTRUCTION ENTRANCE

SITE ACCESS IS FROM STREAM CROSSING ON OXFORD STREET

ANY ADDITIONAL OR ALTERNATE SITE ACCESS POINT(S) WILL BE PROVIDED AT THE PRE-PROPOSAL CONFERENCE.

FINAL DRAWINGS CONTAINING ANY CHANGES OR CLARIFICATIONS TO THE SITE ACCESS POINT(S) WILL BE PROVIDED TO AWARDED CONTRACTOR.

BUFFER AREA FOR CLEARING & SNAGGING

THE BUFFER AREA FOR CLEARING AND SNAGGING IS 25 FEET ON EITHER SIDE OF THE STREAM CHANNEL. NO WORK SHALL OCCUR OUTSIDE OF THE BUFFER AREA.

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Text Box Site 2 (b) Tributary at Commerce Street 32.145288, -82.774175

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TRIBUTARY AT COMMERCE STREET

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SHEET: 3 OF 9

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Text Box DWG: 2 SITE: 2b

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PROJ: DSR-5042-009

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DATE: 08 / 2025

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CITY OF ALAMO, GEORGIA

DSR 13-08-24-5042-009

CLEARING & SNAGGING

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BUFFER AREA FOR CLEARING & SNAGGING

(~25' on both sides of stream channel)

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Text Box Commerce St

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Text Box Pine St

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SITE ACCESS / CONSTRUCTION ENTRANCE

SITE ACCESS IS FROM THE STREAM CROSSINGS ON COMMERCE STREET AND PINE STREET

FINAL DRAWINGS CONTAINING ANY CHANGES OR CLARIFICATIONS TO THE SITE ACCESS POINT(S) WILL BE PROVIDED TO AWARDED CONTRACTOR.

THE BUFFER AREA FOR CLEARING AND SNAGGING IS 25 FEET ON EITHER SIDE OF THE STREAM CHANNEL. NO WORK SHALL OCCUR OUTSIDE OF THE BUFFER AREA.

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TRIBUTARY AT 2ND AVENUE

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Text Box Site 3c Tributary at 2nd Avenue 32.147875, -82.774794

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SHEET: 4 OF 9

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PROJ: DSR-5042-009

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DATE: 08 / 2025

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BUFFER AREA FOR CLEARING & SNAGGING

(~25' on both sides of stream channel)

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CITY OF ALAMO, GEORGIA

DSR 13-08-24-5042-009

CLEARING & SNAGGING

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SITE ACCESS / CONSTRUCTION ENTRANCE

SITE ACCESS IS FROM THE STREAM CROSSING ON 2ND AVENUE.

FINAL DRAWINGS CONTAINING ANY CHANGES OR CLARIFICATIONS TO THE SITE ACCESS POINT(S) WILL BE PROVIDED TO AWARDED CONTRACTOR.

THE BUFFER AREA FOR CLEARING AND SNAGGING IS 25 FEET ON EITHER SIDE OF THE STREAM CHANNEL. NO WORK SHALL OCCUR OUTSIDE OF THE BUFFER AREA.

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TRIBUTARY AT US HWY 280

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Text Box Site 4d:

Tributary at US Hwy 280 32.149513, -82.776457

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SHEET: 5 OF 9

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Text Box DWG: 4 SITE: 4d

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PROJ: DSR-5042-009

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DATE: 08 / 2025

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CITY OF ALAMO, GEORGIA

DSR 13-08-24-5042-009

CLEARING & SNAGGING

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BUFFER AREA FOR CLEARING & SNAGGING

(~25' on both sides of stream channel)

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SITE ACCESS / CONSTRUCTION ENTRANCE

SITE ACCESS IS FROM THE STREAM CROSSING ON HWY 280

FINAL DRAWINGS CONTAINING ANY CHANGES OR CLARIFICATIONS TO THE SITE ACCESS POINT(S) WILL BE PROVIDED TO AWARDED CONTRACTOR.

THE BUFFER AREA FOR CLEARING AND SNAGGING IS 25 FEET ON EITHER SIDE OF THE STREAM CHANNEL. NO WORK SHALL OCCUR OUTSIDE OF THE BUFFER AREA.

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TRIBUTARY AT LITTLE ROCK ROAD

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Text Box Site 5e Tributary at Little Rock Road 32.148357, -82.787344

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SHEET: 6 OF 9

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Text Box DWG: 5 SITE: 5e

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PROJ: DSR-5042-009

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DATE: 08 / 2025

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CITY OF ALAMO, GEORGIA

DSR 13-08-24-5042-009

CLEARING & SNAGGING

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BUFFER AREA FOR CLEARING & SNAGGING

(~25' on both sides of stream channel)

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LITTLE ROCK RD

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TOWNS AVE

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STUBBS ST

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LIFT STATION #3

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SITE ACCESS / CONSTRUCTION ENTRANCE

SITE ACCESS IS FROM THE STREAM CROSSINGS ON LITTLE ROCK RD AND STUBBS ST PAST LIFT STATION #3.

FINAL DRAWINGS CONTAINING ANY CHANGES OR CLARIFICATIONS TO THE SITE ACCESS POINT(S) WILL BE PROVIDED TO AWARDED CONTRACTOR.

THE BUFFER AREA FOR CLEARING AND SNAGGING IS 25 FEET ON EITHER SIDE OF THE STREAM CHANNEL. NO WORK SHALL OCCUR OUTSIDE OF THE BUFFER AREA.

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CLEARING & SNAGGING & MULCHING DETAILS

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NRCS CONSERVATION PRACTICE STANDARDS

CLEARING & SNAGGING (CODE 326)

MULCHING (CODE 484)

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PLANS AND SPECIFICATIONS

Prepare plans and specifications for clearing and snagging that describe the requirements for applying the practice to achieve its intended purpose(s).

As a minimum, include, as applicable, the following items in the plans and specifications:

• Map of overall area including work limits and limits of clearing and snagging required.

• Location of ingress and egress to the site.

• Description of works of improvement, extent of removal, and manner of disposal.

• Location of disposal areas or location of areas off limits for disposal of debris.

• Requirements for stabilization and vegetation in disturbed areas.

• Location and description of trees or vegetation to be left undisturbed.

• Manner and sequence of construction operations so that impacts on the environment will be minimized.

• Hazardous material identification procedure.

• Erosion control measures, as applicable.

Carry out all operations in a safe and skillful manner. Observe all safety and health regulations and use appropriate safety measures.

OPERATION AND MAINTENANCE

Provide an operation and maintenance plan to the landowner/user to maintain stream capacity and vegetative cover. Items to include are—

• Assessing the area after each major storm event for downed trees and debris accumulation. Remove or relocate and anchor downed trees and debris accumulations that are causing bank erosion problems as soon as possible.

• Periodically inspecting the area for signs of streambank undermining or instability. Remove any debris accumulations that may contribute to the instability and closely monitor the area.

• Clearing any vegetation and/or debris that blocks side drainage structures and streams.

• Promptly repair eroded areas.

• Maintain companion conservation practices to NRCS specifications.

REFERENCES

USDA NRCS. 2007. National Engineering Handbook (Title 210), Part 654, Stream Restoration Design. Washington, D.C. https://directives.sc.egov.usda.gov/ USDA NRCS. 2009. National Biology Handbook (Title 190), Part 614.00, Stream Visual Assessment Protocol Version 2. Washington, D.C. https://directives.sc.egov.usda.gov/

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CONSERVATION PRACTICE STANDARD

CLEARING AND SNAGGING

CODE 326 (ft)

DEFINITION

Removal of specified vegetation along the bank (clearing) and selective removal of snags, drifts, or other obstructions (snagging) from natural or improved streams (includes channels).

PURPOSE

This practice is used to accomplish one or more of the following purposes:

• Restore flow capacity and direction to prevent and/or reduce ponding and flooding

• Prevent and or reduce excessive bank erosion

• Prevent and/or reduce sediment transported to surface water

• Prevent or reduce debris impacts to infrastructure CONDITIONS WHERE PRACTICE APPLIES: Any natural or improved stream where the removal of vegetation, trees, brush, and other obstructions is needed to accomplish one or more of the listed purposes.

CRITERIA

Site preparation Conduct a site investigation to identify any physical, chemical, or biological conditions that could affect the successful establishment of vegetation.

Clear areas to be planted of unwanted materials and smooth or shape, if needed, to meet planting purpose(s). Prepare a suitable seedbed for all seeded species. Rip compacted layers and re-firm the soil prior to seedbed preparation, as needed.

Location Include the work limits and flow area of the stream in the area to be cleared and snagged. Trees on the bank that are leaning over or other objects that may fall into the stream may be included. Clearing and snagging may also be used for other areas, such as temporary disposal areas or travelways, required for implementation of this practice.

Capacity Determine the capacity of the stream, both before and after modification as needed, using NRCS National Engineering Handbook (NEH) (Title 210), Part 654, Chapter 6, “Stream Hydraulics.” Select a value of Manning’s “n” roughness coefficient to determine stream capacity after modification that reflects the degree of natural changes and maintenance expected to occur in future years. Other capacity analysis may be performed at the discretion of the design engineer, area engineer, or state engineer.

Stability Clearing and snagging activities may affect stream stability. The effect on downstream and upstream reaches due to the removal of obstructions must be analyzed using appropriate stream geomorphologic procedures. Avoid or mitigate activities that negatively affect stability.

Debris disposal Remove cleared and snagged material from the floodplain or deposit in areas or in a manner that will not significantly affect the flow capacity of the floodplain. Designate proper locations to dispose of all debris including invasive species and where the debris will not remobilize during future flood events.

Hazardous materials Hazardous materials such as propane tanks and car bodies may be part of the debris that is to be removed. The contractor will investigate the debris in the work limit area prior to and during removal to ensure that all work is performed in a safe manner and hazardous debris is properly disposed of.

Vegetation Restore all areas denuded and/or disturbed during clearing and snag removal by planting vegetation, unless the disturbance is minimal and conditions are highly conducive for natural regeneration of vegetation. Use native vegetation where practical. Vegetation established as part of this practice should include ecologically suitable species obtained from local sources wherever practical. Take precautions to prevent introduction of invasive species. Minimize disturbance of wetlands, riparian areas, and fish and wildlife habitat sites, and avoid disturbance where possible. The establishment of vegetation on cleared and snagged areas will be in accordance with the criteria contained within NRCS Conservation Practice Standard (CPS) Critical Area Planting (Code 342).

CONSIDERATIONS

Debris in stream systems affects the physical characteristics of the stream as well as the diversity and abundance of its aquatic organisms. Fisheries and/or aquatic biologists can assist in evaluating and incorporating measures to improve aquatic and riparian-wetland habitat.

Incorporate enhancements for fish and wildlife values as needed and practical. Special attention should be given to landscape aesthetics and to protecting and maintaining key shade, food, and den trees. Use NRCS CPS Stream Habitat Improvement and Management (Code 395).

In addition to NRCS CPS Critical Area Planting (Code 342), for areas where it is difficult to establish vegetation consider NRCS CPSs Riparian Herbaceous Cover (Code 390), Riparian Forest Buffer (Code 391), Access Control (Code 472), Mulching (Code 484), Streambank and Shoreline Protection (Code 580), and Tree/Shrub Establishment (Code 612).

Retain habitat-forming elements that provide cover, food, pools, and water turbulence, to the extent possible.

Root balls of fallen trees that are securely anchored in the stream or naturally formed logjams may provide fish habitat and/or stability. The effects of these items should be included in the stream capacity hydraulic analysis. Existing root structure and stumps firmly within the soil should remain to help stabilize the soil and facilitate resprouting of woody vegetation. Erosion rates decline as a percentage of vegetative roots in a streambank increases. Selection of appropriate riparian vegetation will increase the streambank's ability to resist future erosion.

Clearing and snagging activity may re-suspend sediments in the flow. Consider techniques that promote beneficial sediment deposition and the filtering of sediment. During construction, woody materials may float downstream and cause additional snags and drifts. Incorporate measures as needed and practical to address this concern. Schedule in-stream work to avoid environmentally sensitive periods such as spawning and migration to the fullest extent possible. Incorporate measures and practices, as needed and practical, to address modified flow conditions that adversely affect resources such as—

• A lowered hydraulic gradient that may drain adjacent flood plains more quickly.

• Decreased ground water recharge in water-losing streams resulting from reduced residence time in the stream and adjacent floodplains.

Ground-disturbing activities associated with this practice have the potential to adversely affect protected plant species and may encourage the establishment of invasive plant species. Quickly revegetating disturbed areas can minimize the introduction of nonnative species.

Temporary erosion and sediment best management practices can be used to minimize the delivery of fine sediment to adjacent and downstream reaches.

Incorporate construction methods that enhance fish and wildlife values as needed and practical to include—

• Use of hand-operated equipment, water-based equipment, or small equipment to minimize soil, water, and other resource disturbances.

• Operation of heavy machinery from atop adjacent streambanks to the fullest extent possible.

• After the material has been removed from streambank locations, limiting machinery access to riparian areas to minimize damage to stream habitat.

No special considerations have been identified for this practice.

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SHEET 7 OF 9

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DWG: SITE:

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PROJ: DSR-5042-009

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DATE: 08 / 2025

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CITY OF ALAMO, GEORGIA

DSR 13-08-24-5042-009

CLEARING & SNAGGING

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ENTER BUFFER AT 90°ANGLES ONLY TO ACCESS STREAM CHANNEL

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ENTER BUFFER AT 90°ANGLES ONLY TO ACCESS STREAM CHANNEL

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CUT TREE AT ROOT BALL

ROOTBALL TO REMAIN

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25' BUFFER

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25' BUFFER

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Text Box STREAM CHANNEL (width varies)

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LIMITS OF OPERATION

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LIMITS OF OPERATION

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TOP OF BANK

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CUT TREE AT ROOT BALL

ROOTBALL TO REMAIN

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CLEAN CUT

(STUMP TO REMAIN)

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CLEAN CUT

(STUMP TO REMAIN)

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CENTERLINE

OF STREAM

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CONSERVATION PRACTICE STANDARD

MULCHING

CODE 484 (ac)

DEFINITION

Applying plant residues or other suitable materials to the land surface.

PURPOSE

This practice is applied to achieve the following purpose(s):

- Improve the efficiency of moisture management; Reduce irrigation energy used in farming/ranching practices and field operations; Improve the efficient use of irrigation water; Prevent excessive bank erosion from streams, shorelines, or water conveyance channels; Reduce concentrated flow erosion; Reduce sheet, rill, and wind erosion; Improve plant productivity and health; Maintain or increase organic matter content; Reduce emissions of particulate matter

CONDITIONS WHERE PRACTICE APPLIES

This practice applies to all lands where mulches are needed.

CRITERIA

General Criteria Applicable to All Purposes The selection of mulching materials will depend primarily on the purpose(s) for the mulch application, site conditions, and material availability. The mulch materials may consist of natural or synthetic materials of sufficient dimension (depth or thickness) and durability to achieve the intended purpose for the required time period. Prepare the soil surface to achieve the desired purpose. Apply the mulch material evenly. Use tackifiers, emulsions, pinning, netting, crimping, or other methods of anchoring, if needed, to hold the mulch in place for specified periods.

In cases where furrow erosion may occur due to concentrated flows from mulches(e.g., plastic mulches on beds), take appropriate measures to protect the furrows and the furrow outlets.

Apply manufactured mulches according to the manufacturer's specifications. Remove synthetic mulches from the field prior to the next crop. Do not incorporate (e.g. disk) synthetic mulches a into the soil. When mulching with wood products such as wood chips, bark, or shavings or other wood materials, apply a minimum 2-inch thickness of particles that remain in place during heavy rainfall or strong wind events, or both if applicable. The minimum size of mulching material consisting of gravel or other inorganic mulching is 0.75 inches and applied to a minimum depth of 2 inches. When mulching with cereal grain straw or grass hay, apply at a rate to achieve a minimum 70 percent ground cover. Determine the mulch rate using the current erosion prediction technology for the intended purpose. Do not apply plant-based mulch materials with a carbon (C) to nitrogen (N) ratio of less than 20:1 to watercourses.

Additional Criteria to Improve the Efficiency of Moisture Management, to Reduce Irrigation Energy Used in Farming/Ranching Practices, and Field Operations or to Improve the Efficient Use of Irrigation Water Apply mulch materials to cover at least 90 percent of the soil surface to reduce potential evaporation. Fine textured mulches (e.g., rice hulls) which allow less oxygen penetration than coarser materials should be no thicker than 2 inches Additional Criteria to Improve Plant Productivity and Health When establishing vegetative cover, apply mulch at a rate that achieves a minimum of 70 percent ground cover to provide protection from erosion and runoff and yet allow adequate light and air penetration to the seedbed to ensure proper germination and emergence.

Additional Criteria to Increase Organic Matter Content Use plant-based mulching materials of suitable quantity and quality to add organic matter, provide food and shelter for soil biota, and protect the soil surface from raindrop impact and crusting, while allowing for adequate soil aeration. An evaluation of the system using the current approved soil conditioning index (SCI) procedure results in zero or higher.

CONSIDERATIONS

Evaluate the effects of mulching on evaporation, infiltration, and runoff. Mulch material may affect microbial activity in the soil surface, increase infiltration, and decrease runoff, erosion, and evaporation. The temperature of the surface runoff may also be lowered.

Mulch materials with low permeability may adversely affect the water needs of plants.

Avoid excessively thick or tightly packed mulches that can result in soggy anaerobic conditions at the soil surface during wet weather, or prevent rainfall or overhead irrigation from reaching the soil during times of moisture deficit.

Organic materials with C:N ratios of less than 20:1 will release nitrate-nitrogen that can cause water quality impairments.

Finely divided plant residues (e.g., sawdust) and those rich in soluble carbohydrates (e.g., fresh green-chopped sorghum-sudangrass, corn, or other grasses) that have a C:N ratio greater than 30 can tie up soil N and necessitate supplemental N applications on crops. Coarser materials such as grain straw and chipped brush usually do not reduce crop-available soil N levels unless and until they are incorporated into the soil by tillage or cultivation.

Mulching may also provide habitat for beneficial organisms and provide pest suppression.

In attempting to provide habitat for ground beetles,spiders, and other predators of weed seeds and crop pests, use mulch of sufficient ground cover and suitable thickness and texture for the targets pecies. Avoid excessively thick or tightly packed mulches, which can interfere with the movement of ground beetles and other beneficial organisms, and may increase the incidence of crop pests and diseases. Consider mulching crops only if the selected mulching materials, and rates of application do not contribute to pest problems.

During the period when weed seed predation is desired and predators are most active, avoid pesticide applications or pesticide exposures that could adversely affect weed seed consumers.

Low permeability mulches (e.g., plastic) may increase concentrated flow and erosion on unmulched areas.

Light-reflecting mulches such as white or aluminized plastic film or bright straw can repel some pests.

Consider potential beneficial or detrimental effects of mulching materials on the biotic community surrounding the crop, including beneficial soil micro- and macro-organisms, as well as plant pathogens and plant pests. These effects are specific to site, mulch, and crop, and may include enhanced soil microbial activity, increased or reduced levels of crop diseases, and toxic (allelopathic) activity against the crop, weeds, or other beneficial or pest organisms.

Keep mulch 3 to 6 inches away from plant stems and crowns to prevent disease and pest problems. Additional weed control may be needed around the plant base area.

Deep mulch provides nesting habitat for ground-burrowing rodents that can chew extensively on tree trunks and tree roots. Light mulch applied after the first cold weather may prevent rodents from nesting.

Some mulch material may adversely affect aquatic environments through changes in water chemistry or as waterborne debris. Consider placing mulch in locations that minimizes these risks. Consider potential effects of soil physical, chemical and biological properties. Refer to soil survey data as a preliminary planning tool for assessment of areas. Consult a resource soil scientist or the Web Soil Survey at: http://websoilsurvey.nrcs.usda.gov/app/ to obtain soil properties and qualities information.

For all organic or transitioning to organic operations, follow all National Organic Program (NOP) rules.

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Text Box MULCHING CODE 484 (continued)

CONSIDERATIONS

Evaluate the effects of mulching on evaporation, infiltration, and runoff. Mulch material may affect microbial activity in the soil surface, increase infiltration, and decrease runoff, erosion, and evaporation. The temperature of the surface runoff may also be lowered.

Mulch materials with low permeability may adversely affect the water needs of plants.

Avoid excessively thick or tightly packed mulches that can result in soggy anaerobic conditions at the soil surface during wet weather, or prevent rainfall or overhead irrigation from reaching the soil during times of moisture deficit.

Organic materials with C:N ratios of less than 20:1 will release nitrate-nitrogen that can cause water quality impairments.

Finely divided plant residues (e.g., sawdust) and those rich in soluble carbohydrates (e.g., fresh green-chopped sorghum-sudangrass, corn, or other grasses) that have a C:N ratio greater than 30 can tie up soil N and necessitate supplemental N applications on crops. Coarser materials such as grain straw and chipped brush usually do not reduce crop-available soil N levels unless and until they are incorporated into the soil by tillage or cultivation.

Mulching may also provide habitat for beneficial organisms and provide pest suppression.

In attempting to provide habitat for ground beetles,spiders, and other predators of weed seeds and crop pests, use mulch of sufficient ground cover and suitable thickness and texture for the targets pecies. Avoid excessively thick or tightly packed mulches, which can interfere with the movement of ground beetles and other beneficial organisms, and may increase the incidence of crop pests and diseases. Consider mulching crops only if the selected mulching materials, and rates of application do not contribute to pest problems.

During the period when weed seed predation is desired and predators are most active, avoid pesticide applications or pesticide exposures that could adversely affect weed seed consumers.

Low permeability mulches (e.g., plastic) may increase concentrated flow and erosion on unmulched areas.

Light-reflecting mulches such as white or aluminized plastic film or bright straw can repel some pests.

Consider potential beneficial or detrimental effects of mulching materials on the biotic community surrounding the crop, including beneficial soil micro- and macro-organisms, as well as plant pathogens and plant pests. These effects are specific to site, mulch, and crop, and may include enhanced soil microbial activity, increased or reduced levels of crop diseases, and toxic (allelopathic) activity against the crop, weeds, or other beneficial or pest organisms.

Keep mulch 3 to 6 inches away from plant stems and crowns to prevent disease and pest problems. Additional weed control may be needed around the plant base area.

Deep mulch provides nesting habitat for ground-burrowing rodents that can chew extensively on tree trunks and tree roots. Light mulch applied after the first cold weather may prevent rodents from nesting.

Some mulch material may adversely affect aquatic environments through changes in water chemistry or as waterborne debris. Consider placing mulch in locations that minimizes these risks.

Consider potential effects of soil physical, chemical and biological properties. Refer to soil survey data as a preliminary planning tool for assessment of areas. Consult a resource soil scientist or the Web Soil Survey at: http://websoilsurvey.nrcs.usda.gov/app/ to obtain soil properties and qualities information.

For all organic or transitioning to organic operations, follow all National Organic Program (NOP) rules.

PLANS AND SPECIFICATIONS

Prepare specifications for each site and purpose on the approved implementation requirements documentation.

Documentation must include -- • Purpose of the mulch. • Type of mulch material used. • Percent cover or thickness of mulch material, as applicable. • Timing of application. • Site preparation. • Listing of netting, tackifiers, or method of anchoring. • Operations and maintenance.

OPERATION AND MAINTENANCE

Periodically inspect the mulched areas and reinstall mulch or repair as needed to accomplish the intended purpose.

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NOTE:

1. METHODS TO REMOVE FLOW OBSTRUCTION INCLUDE SAWING, CABLING, WINCHING, LIFTING, OR DRAGGING. EQUIPMENT USED WILL GENERALLY HYDRAULIC EXCAVATORS EQUIPPED WITH MECHANICAL THUMB OR GRAPPLE ATTACHMENT, LOADERS, WINCHES MOUNTED ON TRACKED OR RUBBER-TIRED EQUIPMENT, PORTABLE WINCHES, AND CHAINSAWS. NO EQUIPMENT WILL BE PERMITTED WITHIN THE STREAM. ALL EQUIPMENT WILL OPERATE FROM BEYOND THE TOP OF THE STREAM BANKS.HEAVY EQUIPMENT WORKING IN WETLANDS MUST BE PLACED ON MATS OR OTHER MEASURES MUST BE TAKEN TO MINIMIZE SOIL DISTURBANCE. MECHANIZED LAND CLEARING WILL NOT OCCUR WITHIN WETLANDS AT ANY TIME.

2. DO NOT REMOVE TREES FROM THE STREAM CHANNEL THAT WERE DEPOSITED PRIOR TO THE STORM EVENT AND ARE IN AN ADVANCE STAGE OF DECAY. ONLY TREE STUMPS COMPLETELY UPROOTED BY THE STORM EVENT ARE TO BE REMOVED. SNAGS ARE TO BE CUT OFF AT STUMP LEVEL AND REMOVED. STUMPS FROM SNAGS WILL REMAIN IN PLACE.

3. DEBRIS FROM PROJECT AREAS SHALL BE DISPOSED BY CONTRACTOR.

4. DAMAGE TO ADJACENT STREAM AREAS SHALL BE KEPT TO A MINIMUM DURING CLEARING AND SNAGGING OPERATIONS. ALL DAMAGED AREAS SHALL BE STABILIZED CONCURRENT WITH LAND DISTURBING ACTIVITIES.

5. BEST MANAGEMENT PRACTICES EMPLOYED DURING THE OPERATION TO AVOID STREAM BANK EROSION AND SEDIMENTATION RUN OFF INTO THE STREAM

6. THE CLEARING AND SNAGGING OPERATIONS SHALL BE CONFINED TO 25 FEET FROM THE TOP OF BANK ON EACH SIDE OF THE STREAM (DISTANCE VARIES).

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1. AVOID LOCATING ON STEEP SLOPES OR AT CURVES ON PUBLIC ROADS. AVOID LOCATING ON STEEP SLOPES OR AT CURVES ON PUBLIC ROADS.

2. REMOVE ALL VEGETATION AND OTHER UNSUITABLE MATERIAL FROM THE FOUNDATION AREA, GRADE, AND REMOVE ALL VEGETATION AND OTHER UNSUITABLE MATERIAL FROM THE FOUNDATION AREA, GRADE, AND CROWN FOR POSITIVE DRAINAGE.

3. AGGREGATE SIZE SHALL BE IN ACCORDANCE WITH NATIONAL STONE ASSOCIATION R-2 (1.5"-3.5" STONE). AGGREGATE SIZE SHALL BE IN ACCORDANCE WITH NATIONAL STONE ASSOCIATION R-2 (1.5"-3.5" STONE).

4. GRAVEL PAD SHALL HAVE A MINIMUM THICKNESS OF 6". GRAVEL PAD SHALL HAVE A MINIMUM THICKNESS OF 6".

5. PAD WIDTH SHALL BE EQUAL FULL WIDTH AT ALL POINTS OF VEHICULAR EGRESS, BUT NO LESS THAN 20'. PAD WIDTH SHALL BE EQUAL FULL WIDTH AT ALL POINTS OF VEHICULAR EGRESS, BUT NO LESS THAN 20'.

6. A DIVERSION RIDGE SHOULD BE CONSTRUCTED WHEN GRADE TOWARD PAVED AREA IS GREATER THAN 2%.. A DIVERSION RIDGE SHOULD BE CONSTRUCTED WHEN GRADE TOWARD PAVED AREA IS GREATER THAN 2%..

7. INSTALL PIPE UNDER THE ENTRANCE IF NEEDED TO MAINTAIN DRAINAGE DITCHES. INSTALL PIPE UNDER THE ENTRANCE IF NEEDED TO MAINTAIN DRAINAGE DITCHES.

8. WHEN WASHING IS REQUIRED, IT SHOULD BE DONE ON AN AREA STABILIZED WITH CRUSHED STONE THAT WHEN WASHING IS REQUIRED, IT SHOULD BE DONE ON AN AREA STABILIZED WITH CRUSHED STONE THAT DRAINS INTO AN APPROVED SEDIMENT TRAP OR SEDIMENT BASIN (DIVERT ALL SURFACE RUNOFF AND DRAINAGE FROM THE ENTRANCE TO A SEDIMENT CONTROL DEVICE).

9. WASHRACKS AND/OR TIRE WASHERS MAY BE REQUIRED DEPENDING ON SCALE AND CIRCUMSTANCE. IF WASHRACKS AND/OR TIRE WASHERS MAY BE REQUIRED DEPENDING ON SCALE AND CIRCUMSTANCE. IF NECESSARY, WASHRACK DESIGN MAY CONSIST OF ANY MATERIAL SUITABLE FOR TRUCK TRAFFIC THAT SUITABLE FOR TRUCK TRAFFIC THAT FOR TRUCK TRAFFIC THAT REMOVE MUD AND DIRT.

10. MAINTAIN AREA IN A WAY THAT PREVENTS TRACKING AND/OR FLOW OF MUD ONTO PUBLIC MAINTAIN AREA IN A WAY THAT PREVENTS TRACKING AND/OR FLOW OF MUD ONTO PUBLIC RIGHTS-OF-WAYS. THIS MAY REQUIRE TOP DRESSING, REPAIR AND/OR CLEANOUT OF ANY MEASURES USED TO TRAP SEDIMENT.

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GENERAL EROSION CONTROL NOTES .

IT SHALL BE THE CONTRACTOR'S RESPONSIBILITY TO PROVIDE EROSION CONTROL FOR ALL DRAINAGE PATTERNS CREATED AT ALL STAGES OF CONSTRUCTION. CONSTRUCTION OR LAND CLEARING SHALL BEGIN WITH THE INSTALLATION OF EROSION CONTROL MEASURES.

SEDIMENT CONTROL WILL BE ACHIEVED BY USE OF SILT FENCE AND CHECK DAMS. REMOVE ACCUMULATED SILT FROM SILT FENCE AND CHECK DAMS WHEN THEY REACH 1.5' IN DEPTH.

CONTRACTOR SHALL INSPECT EROSION CONTROL MEASURES DAILY AND AFTER ALL RAIN EVENTS. ANY DAMAGES SHOULD BE REPAIRED BY THE END OF THE DAY. SEDIMENT DISPOSAL SHALL BE ACCOMPLISHED BY SPREADING EVENLY OVER THE SITE. SEDIMENT FENCES SHALL REMAIN UNTIL THE AREA IS STABILIZED.

EROSION CONTROL MEASURES IN THE PLAN ARE THE MINIMUM REQUIRED. THE CONTRACTOR SHALL PROVIDE ADDITIONAL CONTROL MEASURES AS DETERMINED BY ACTUAL FIELD CONDITIONS.

ALL RIP-RAP SHALL BE INSTALLED FLUSH WITH CHANNEL BANKS AND BOTTOM.

NOTES REGARDING CRITICAL WORK ZONE

AT THE END OF EACH WORK DAY ALL SLOPES 2:1 OR STEEPER AND HIGHER THAN 5 FEET SHALL RECEIVE SURFACE ROUGHENING, POLYMERS, AND EROSION CONTROL MATTING, ADDITIONALLY, ALL FILL SLOPES SHALL RECEIVE A DIVERSION DIKE AND TEMPORARY DOWN DRAINS ALONG THE TOP OF THE SLOPE PREVENTING DRAINAGE SPILLING OVER THE EDGE AND DOWN THE FACE OF THE SLOPE. THE TEMPORARY DOWN DRAINS SHALL BE CONSTRUCTED WITH PERFORATED STAND PIPES AT THE TOP OF THE SLOPE AND RECONSTRUCTED EACH DAY AS THE SLOPE INCREASES IN HEIGHT.

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STORM DEBRIS REMOVAL - CLEARING & SNAGGING CONSTRUCTION NOTES

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DATE: 08 / 2025

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PROJ: DSR-5042-009

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DWG: SITE:

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CITY OF ALAMO, GEORGIA

DSR 13-08-24-5042-009

CLEARING & SNAGGING

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BEST MANAGEMENT PRACTICES (BMP)

HEAVY EQUIPMENT & EARTH-MOVING ACTIVITIES

HEAVY EQUIPMENT OPERATION PROBLEMS

SOIL EXCAVATION AND GRADING OPERATIONS OFTEN CONTRIBUTE TO RUNOFF POLLUTION. BY LOOSENING LARGE AMOUNTS OF SOIL AND SEDIMENT, EARTH-MOVING ACTIVITIES CAN CAUSE SEDIMENT TO FLOW INTO GUTTERS, STORM DRAINS, AND STREAMS. SEDIMENT IS THE MOST COMMON POLLUTANT WASHED FROM WORK SITES, CREATING MULTIPLE PROBLEMS WHEN IT ENTERS THE STREAM. SEDIMENT CLOGS THE GILLS OF FISH, BLOCKS THE TRANSMISSION OF LIGHT, AND INCREASES STREAM WATER TEMPERATURE, ALL OF WHICH HARM LIFE, DISTURBING THE FOOD CHAIN UPON WHICH BOTH FISH AND PEOPLE DEPEND UPON. SEDIMENT ALSO CARRIES WITH IT OTHER WORK SITE POLLUTANTS SUCH AS PESTICIDES, CLEANING SOLVENTS, CEMENT WASH, ASPHALT AND CAR FLUIDS LIKE MOTOR OIL, GREASE AND FUEL. THUS, POORLY MAINTAINED VEHICLES AND HEAVY EQUIPMENT LEAKING FUEL AND OIL AT THE CONSTRUCTION SITE, CONTRIBUTING TO POLLUTION.

SOLUTIONS BEST MANAGEMENT PRACTICES (BMP) SUCH AS HANDLING, STORING, AND DISPOSING OF MATERIALS PROPERLY CAN PREVENT POLLUTANTS FROM ENTERING THE STORM DRAINS.

GENERAL BUSINESS PRACTICES SCHEDULE EXCAVATION AND GRADING WORK FOR DRY WEATHER. USE AS LITTLE WATER AS POSSIBLE FOR DUST CONTROL.

CLEAN UP SPILLS NEVER HOSE DOWN "DIRTY" PAVEMENT OR IMPERMEABLE SURFACES WHERE FLUIDS HAVE SPILLED. USE DRY CLEANUP METHODS (SAWDUST OR RAGS) AND DISPOSE PROPERLY. SWEEP UP AND DRY SPILLED MATERIALS IMMEDIATELY. NEVER ATTEMPT TO BURY THEM OR WASH THEM AWAY WITH WATER. CLEAN UP SPILLS ON DIRT AREAS BY DIGGING UP AND DISPOSING OF CONTAMINATED SOILS. REPORT SIGNIFICANT SPILLS TO THE APPROPRIATE SPILL RESPONSE AGENCIES IMMEDIATELY.

VEHICLE AND EQUIPMENT MAINTENANCE MAINTAIN ALL VEHICLE AND HEAVY EQUIPMENT IN GOOD WORKING ORDER AND INSPECT FREQUENTLY FOR LEAKS. CONDUCT ALL VEHICLE/EQUIPMENT MAINTENANCE AND REFUELING AT ONE LOCATION THAT IS AWAY FROM STORM DRAINS. PERFORM MAJOR MAINTENANCE, REPAIR JOBS, AND VEHICLE/EQUIPMENT WASHING OFF-SITE. USE GRAVEL APPROACHES WHERE TRUCK TRAFFIC IS FREQUENT, TO REDUCE SOIL COMPACTION AND LIMIT THE TRACKING OF SEDIMENT INTO THE STREET. USE DRIP PANS OR DROP CLOTHS TO CATCH DRIPS AND SPILLS IF YOU DRAIN AND REPLACE MOTOR OIL, RADIATOR COOLANT, OR OTHER FLUIDS ON SITE. COLLECT ALL USED FLUIDS, STORE IN SEPARATE CONTAINERS, AND RECYCLE WHENEVER POSSIBLE. DO NOT USE DIESEL OIL TO LUBRICATE EQUIPMENT OR PARTS.

EROSION PREVENTION AFTER CLEARING, GRADING OR EXCAVATING, EXPOSED SOIL POSES A CLEAR AND IMMEDIATE DANGER FOR STORMWATER POLLUTION. REVEGETATION (TEMPORARY OR PERMANENT) IS AN EXCELLENT FORM OR EROSION CONTROL FOR ANY SITE. AVOID EXCAVATION AND GRADING ACTIVITIES DURING WET WEATHER. CONSTRUCT DIVERSION DIKES TO CHANNEL RUNOFF AROUND THE SITE. LINE CHANNELS WITH GRASS OR ROUGHENED PAVEMENT TO REDUCE RUNOFF VELOCITY. COVER STOCKPILES AND EXCAVATED SOIL WITH SECURED TARPS OR PLASTIC SHEETING. REMOVE EXISTING VEGETATION ONLY WHEN ABSOLUTELY NECESSARY. LARGE PROJECTS SHOULD BE CONDUCTED IN PHASES. CONSIDER PLANTING TEMPORARY VEGETATION FOR EROSION CONTROL ON SLOPES WHERE CONSTRUCTION IS NOT IMMEDIATELY PLANNED. PLANT PERMANENT VEGETATION AS SOON AS POSSIBLE, ONCE EXCAVATION AND GRADING ACTIVITIES ARE COMPLETE.

VEHICLE FUELING VEHICLE EQUIPMENT FUELING PROCEDURES AND PRACTICES ARE DESIGNED TO PREVENT FUEL SPILLS AND LEAKS, AND REDUCE OR ELIMINATE CONTAMINATION OF STORMWATER. THIS CAN BE ACCOMPLISHED BY USING OFFSITE FACILITIES, FUELING DESIGNATED AREAS ONLY, ENCLOSING OR COVERING STORED FUEL, IMPLEMENTING SPILL CONTROLS, AND TRAINING EMPLOYEES AND SUBCONTRACTORS IN PROPER FUELING PROCEDURES.

SUITABLE APPLICATIONS THESE PROCEDURES ARE SUITABLE ON ALL CONSTRUCTION SITES WHERE VEHICLE AND SITES WHERE VEHICLE AND EQUIPMENT FUELING TAKES PLACE. ONSITE VEHICLE AND EQUIPMENT FUELING SHOULD ONLY BE USED WHERE IT IS IMPRACTICAL TO SEND VEHICLES AND EQUIPMENT OFFSITE FOR FUELING. SENDING VEHICLES AND EQUIPMENT OFFSITE SHOULD BE DONE IN CONJUNCTION WITH CO, STABILIZED CONSTRUCTION ENTRANCE/EXIT.

IMPLEMENTATION USE OFFSITE FUELING STATIONS AS MUCH AS POSSIBLE. THESE BUSINESSES ARE BETTER EQUIPPED TO HANDLE FUEL SPILLS PROPERLY. PERFORMING THE WORK OFFSITE CAN ALSO BE ECONOMICAL BY ELIMINATING THE NEED FOR A SEPARATE AREA AT THE WORK SITE. DISCOURAGE "TOPPING OFF OF FUEL TANKS.

SPILL CONTINGENCY PLAN

A. CONTAIN THE SPILL

B. STOP THE SOURCE

C. CLEANUP PROCEDURES SHALL BE CLEARLY POSTED

D. CLEANUP MATERIALS SHALL BE READILY AVAILABLE

SPILL RESPONSE AGENCIES

GA EPD 912-264-7284

NRC 800-424-8802

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VEGETATIVE PLAN FOR DISTURBED AREAS

All bare areas resulting from construction operations will established to perennial vegetation as soon as possible after final grading is complete.

SEEDBED. Prepare seedbed to a depth of at least 4 inches on all areas where a good seedbed is not present. Remove rocks, roots, or other objects that will interfere with vegetation establishment or maintenance operations.

FERTILIZER. Apply agricultural lime at the rate of 1 tons per acre. Apply 1000 lbs. 15-15-15 fertilizer per acre. Spread lime and fertilizer uniformly over all areas immediately before final land preparation and mix thoroughly with the soil. Apply topdressing of 100 lbs. per acre of ammonium nitrate (or equivalent) when plants are 2 to 4 inches tall.

PLANTING. All areas shall be seed with the following:

SEPTEMBER-MARCH

Rye (Temporary Grassing)/Bermuda Mixture (Permanent Grassing) Rye @ 1/2 bushel (3.9 lbs.) per 1000 sqft Unhulled Bermuda @ 0.22 lbs. per 1000 sqft

MARCH-SEPTEMBER

Browntop Millet (Temporary Grassing)/Bermuda Mixture (Permanent Grassing) Browntop Millet @ 10 lbs. per acre Hulled Bermuda @ 10 lbs. per acre MULCHING. 2 Tons per acre of straw. Anchor mulch into ground. Mulch shall be approximately 1-2 inches thick.

MAINTENANCE. Apply 400 lbs. per acre or 10-10-10 fertilizer and topdress with 30 lbs. of ammonium nitrate per acre every year. Apply 1 ton of lime per 5 years.

PROVIDE VEGETATION AND MULCHING TO ALL DISTURBED AREAS IMMEDIATELY AFTER GRADING. LAND CLEARING SHALL BE KEPT TO A MINIMUM AND SHALL BE ACCOMPLISHED IN A WAY TO MINIMIZE EROSION. SCHEDULE LAND DISTURBING ACTIVITIES WITH REGARD TO WEATHER FORECAST TO LIMIT EXPOSURE OF UNPROTECTED LAND FROM WIND, RAIN AND OTHER EROSIVE FORCES.

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CONSTRUCTION NOTES:

1. REMOVE DOWNED AND SNAGGED MATERIAL FROM THE STREAM CHANNEL PLUS 25' ADJACENT TO THE TOP OF BOTH STREAM BANKS. ONLY STORM DEBRIS IN THE ADJACENT FLOOD PLAIN AREA (WITHIN 25 FEET) THAT COULD EASILY MIGRATE TO THE STREAM CHANNEL SHALL BE REMOVED.

2. REMOVE FALLEN TREES AND LEANING TREES THAT ARE AT AN ANGLE OF 30° OR LESS WITH THE GROUND. UNDERMINED OR STORM DAMAGED TREES WITHIN OR OUTSIDE THE BANKS WHICH ARE STILL STANDING BUT LIKELY TO FALL INTO THE STREAM SHOULD BE REMOVED. ROOT WADS ATTACHED TO THE BANK SHOULD BE LEFT IN PLACE WITH THE TREE SAWN OFF.

3. TREES AND DEBRIS LESS THAN 8" IN DIAMETER ARE NOT REQUIRED TO BE REMOVED. HOWEVER, IF IT CAN BLOCK THE DOWNSTREAM CULVERT OR BRIDGE DURING A FLOODING EVENT AND EASILY MIGRATE INTO THE STREAM CHANNEL, IT SHOULD BE REMOVED. ALL STORM EVENT RELATED FOREIGN DEBRIS, DOWN TREES (EXCEPT FOR INTACT STUMPS/ROOT WADS), BRUSH, LIMBS, TOPS, VINES, AND OTHER WASHED-IN WOODY VEGETATIVE MATERIALS LYING COMPLETELY OR PARTIALLY WITHIN THE STREAM BANKS SHOULD BE REMOVED. UNDER NO CIRCUMSTANCE SHALL OLD (PRE-STORM EVENT) DEBRIS BE REMOVED. ONLY STORM DEBRIS IN THE ADJACENT FLOOD PLAIN AREA (WITHIN 25 FEET) THAT COULD EASILY MIGRATE TO THE STREAM CHANNEL SHALL BE REMOVED.

4. MINIMIZE DISTURBANCE OF WETLANDS, RIPARIAN AREAS, AND FISH AND WILDLIFE HABITAT SITES, AND AVOID DISTURBANCE WHERE POSSIBLE.

5.. RETAIN HABITAT-FORMING ELEMENTS THAT PROVIDE COVER, FOOD, POOLS, AND WATER TURBULENCE, TO THE EXTENT POSSIBLE.

6. CONTRACTOR SHALL NOT REMOVE THE ROOTS, ROOT BALLS, OR STUMP OF ANY TREES OR VEGETATION.

7. CONTRACTOR SHALL REMOVE THE TREE FROM THE ROOT BALL OR STUMP USING SAWS OR OTHER HAND EQUIPMENT.

8. CONTRACTOR SHALL ENTER THE STREAM BUFFER AT RIGHT ANGLES TO THE STREAM.

9. CONTRACTOR SHALL NOT TURN ANY VEHICLE INSIDE THE 25' WIDE STREAM BUFFER.

10. DEBRIS MAY BE BURNED IF APPROPRIATE PERMITS ARE OBTAINED. ALSO, DEBRIS MAY BE MULCHED AND SPREAD ON SITE. DO NOT PLACE DEBRIS IN TRIBUTARIES, SIDE DITCHES, NOR OTHER DEFINED WATER ENTRANCES TO THE WATERCOURSE BEING CLEANED. NO DEBRIS WILL BE DISPOSED IN A WETLAND OR WITHIN THE 100-YEAR FLOODPLAIN.

11. ALL DISTURBED AREA ABOVE WATER LEVELS SHALL BE STABILIZED WITH EROSION CONTROL MATTING IF THE STUMP CANNOT BE REPLACED. MATTING IS NOT NECESSARY IN FLAT AREAS.

12. PERMITS THAT MAY BE REQUIRED FROM GDOT, EPD, OR USACE WILL BE OBTAINED BY ATKINSON COUNTY. PERMITS ARE NOT ANTICIPATED AT THIS TIME.

13. ATKINSON COUNTY WILL OBTAIN TEMPORARY EASEMENTS FROM AFFECTED PROPERTY OWNERS.

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CRITICAL AREA PLANTING DETAILS

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NRCS CONSERVATION PRACTICE STANDARD

CRITICAL AREA PLANTING (CODE 342)

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CONSERVATION PRACTICE STANDARD

CRITICAL AREA PLANTING

CODE 342

(ac)

DEFINITION

Establishing permanent vegetation on sites that have, or are expected to have, high erosion rates, and on sites that have physical, chemical, or biological conditions that prevent the establishment of vegetation with normal seeding/planting methods.

PURPOSE

This practice is used to accomplish one or more of the following purposes:

• Stabilize areas with existing or expected high rates of soil erosion by wind or water

• Stabilize stream and channel banks, pond and other shorelines, earthen features of structural conservation practices

• Stabilize areas such as sand dunes and riparian areas

CONDITIONS WHERE PRACTICE APPLIES

This practice applies to highly disturbed areas such as --

• Active or abandoned mined lands.

• Urban restoration sites.

• Construction areas.

• Conservation practice construction sites.

•Areas needing stabilization before or after natural disasters such as floods, hurricanes, tornados, and wildfires.

• Eroded banks of natural channels, banks of newly constructed channels, and lake shorelines. Other areas degraded by human activities or natural events.

CRITERIA: General Criteria Applicable to All Purposes Site preparation Conduct a site investigation to identify any physical, chemical, or biological conditions that could affect the successful establishment of vegetation.

Clear areas to be planted of unwanted materials and smooth or shape, if needed, to meet planting purpose(s).

Prepare a suitable seedbed for all seeded species. Rip compacted layers and re-firm the soil prior to seedbed preparation, as needed.

As site conditions dictate, when grading slopes, stockpile topsoil to be redistributed over area to be planted.

Species selection Select species for seeding or planting that are suited to local site conditions and intended uses, and common to the site or location.

Selected species will have the capacity to achieve adequate density and vigor to stabilize the site within an appropriate period.

Establishment of vegetation.

Plant seeds using the method or methods best suited to site and soil conditions.

Limit sod placement to areas that can naturally supply needed moisture or sites that can be irrigated during the establishment period. Place and anchor sod using techniques to ensure that it remains in place until established.

Specify species, rates of seeding or planting, legume inoculation, minimum quality of planting stock (e.g., pure live seed (PLS) or stem caliper), method of seedbed preparation, and method of establishment before application. Use only viable, high-quality seed or planting stock.

Seed or plant at a time and in a manner that best ensures establishment and growth of the selected species.

Plant during approved times for the species to be used.

Apply soil amendments (e.g., lime, fertilizer, compost) according to the requirements in the local Field Office Technical Guide.

Mulch or otherwise stabilize (e.g., polyacrylamide (PAM)) plantings as necessary to ensure successful establishment.

PLANS AND SPECIFICATIONS

Prepare plans and specifications for each field or management unit according to the criteria and operation and maintenance sections of this standard. Record practice specifications using approved Implementation Requirements document.

Address the following elements in the plan, as applicable, to meet the intended purpose(s):

• Practice purpose(s)

• Site preparation

• Topsoil requirements

• Fertilizer application

• Seedbed/planting area preparation

• Timing and method of seeding/planting

• Selection of species

• Seed/plant source

• Seed analysis/pure live seed (PLS)

• Seeding rate/plant spacing

• Mulching, PAM, or other stabilizing materials

• Supplemental water needed for establishment

• Protection of plantings

• Describe successful establishment (e.g., minimum percent ground/canopy cover, percent survival, stand density)

OPERATION AND MAINTENANCE

• Control access to the area to ensure the site remains stable.

• Protect plantings shall be protected from pests (e.g., weeds, insects, diseases, livestock, or wildlife) as necessary to ensure long-term survival.

• Inspections, reseeding or replanting, and fertilization may be needed to ensure that this practice functions as intended throughout its expected life.

• Observe establishment progress and success at regular intervals until the practice has met the criteria for successful establishment and implementation.

• Description of successful establishment (e.g., minimum percent ground/canopy cover, percent survival, stand density).

REFERENCES

Federal Interagency Stream Restoration Working Group. 1998. Stream corridor restoration: principles, processes, and practices. USDA NRCS National Engineering Handbook, Part 653.

USDA NRCS. 2007. National Engineering Handbook, Part 654. Stream restoration guide.

USDA NRCS. 2015. The PLANTS Database (http://plants.usda.gov, 8 December 2015). National Plant Data Team, Greensboro, NC.

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Additional Criteria to Stabilize Stream and Channel Banks, Pond and Other Shorelines, Earthen Features of…