the contract cost database using the most recent year of data. The Maryland General Assemblys Office of Legislative Audits operates a toll-free fraud hotline to receive allegations of fraud and/or abuse of State government resources. (a) Exception: US 250NW is 5 pounds short on "grab breaking load" for Sediment Filter Bags. Proven Product Track Record (Aggregate is widely accepted and approved)Wilson Quarry Products are recognized as the Industry Standard in the Monterey Bay Area, Product meets and is Certified for Army Corp Projects. The small-rock slope protection method consists of excavating and backfilling the footing trench, placing rock slope protection fabric as shown, and placing small rocks on the slope. BMP040 "rock slope protection (no fabric)" as applicable. Soil Stabilization Matting - Channel Application, Perm. The equilibrium soil-to-geotextile system that allows for adequate movement of a liquidin the plane of the geotextile over the service lifetime of the application. Shop Lowe's for solutions to control erosion on slopes, as well. Rock Channel Protection Paved Gutter 601.13 Basis of Payment 601.01 Description. Soil Stabilization Matting - Slope Application, Perm. Take care not to tear the filter fabric during installation. endobj Erosion Control Fabrics featured here have been used in a wide range of applications including slope stabilization, sediment containment, runoff filtration, home protection, and vegetative regrowth. Slope protection structures are to be used where concentrated water will cause excessive erosion on existing and/or recent cut and fill slopes. US 160NW resists ultraviolet and biological deterioration, rotting, naturally encountered basics and acids. To compensate for the lack of flexibility in the completed structure, ensure an adequate foundation lies below this type of protection. Chapter 4: Construction Details, Section 72: Slope Protection, Direction of flow and angle of impingement at various water stages, Capability of adjacent soil types to resist erosion from wash and eddy currents. item code description; 729012 rock slope protection fabric (class 10) 729011 rock slope protection fabric (class 8) 723220 concreted-rock slope protection (1/4 t, class v, method b) (ton) Fabric must be RSP fabric that complies with the class shown in the following table: Rock must be cobble, gravel, crushed gravel, crushed rock, or any combination of these. This information is to be used only as a guide. Mirafi 140N is a lightweight non woven geotextile that meets AASHTO M288 Class 3 geotextiles for separation and subsurface drainage. There are three material gra requirements based on required rock layer dation thicknesses. Mirafi 160N is a lightweight nonwoven geotextile that meet AASHTO M288 Class 2 geotextiles for separation and subsurface drainage. Review Section 4-90, Concrete, of this manual for details about concrete production. <>/Font<>>>/Fields[]>> 4 0 obj >> When specified, ensure coloring is added to the concrete. Broken-concrete slope protection consists of placing broken concrete from job site locations identified within the contract. For RSP Classes I thru VIII, use Class 8 RSP-fabric which has lower weight per unit area and it also has lower toughness (tensile x elongation, both at break) than Class 10 RSP-fabric. 6 0 obj Temporary structures shall be left in place until adequate vegetation and the permanent . To respond to the different problems associated with instability of rock faces, Geofabrics also has a broad range of independently verified rockfall mitigation systems. Woven Stabilization and Separation Geotextiles, - Dimensions & Weights for EcoTubes Geotextile Dewatering Tubes, - Dimensions & Weights for EnviroGrid Cellular Confinement, - Material Safety Data Sheet (MSDS) - Drainboard, - Material Safety Data Sheet (MSDS) - Stratagrid, - Material Safety Data Sheet (MSDS) - Envirogrid, - Product Advantages of EcoTubes Geotextile Dewatering Tube, - Product Benefits of EcoTubes Sludge Dewatering Tubes, - Product Benefits of US Fabrics' Foundation Drains, - Product Benefits of US Fabrics' Sheet Drains, Design/Installation Guidelines; Applications, - Comparing Old Style & New Style - Strata Geogrid, - French Drain Exterior Foundation Install, - Geogrid & Welded Wire Form Inside Corner Placement, - Installation Guideline for Separation Heavy Geotextile, - Installation Guideline for Separation Medium Geotextile, - Sheet Drain Exterior Foundation Install, - Theoretical Tube Volumes & Dewatering Capabilities, - Typical Cross Section - Vegetated Reinforced Soil Slope, - Equivalent Products for Composite Drains, - Volumes & Dewatering Capabilities for EcoTubes Geotextile Dewatering Tubes, - Geogrid Quality for Finished Product and Raw Materials, - Use Woven Geotextiles Instead of Geogrids, - Municipal Waste Water & Water Treatment w/ EcoTubes, - SRW (Segmental Retaining Wall) Drainage. These products can be used in areas where they meet the local agency requirements. uuid:bc193511-b4f2-4d99-b47d-5ec173dc2f21 Click on the product name for a data sheet. endobj AASHTO is typical mass of 4.1 sy/oz. At the start of gabion placement, require the contractor to verify the minimum unit weight of the gabions to ensure it meets specifications. cIP=L ?L-o'OfE;9'WgIBdysw>vOo#g 8L3f*7Mnd*3cdLy&v~;6s8;)9Q"SE8a+3/>svm^}+7Ea8IG01nY5y7mxJ]X9sGjv][ppYdv r=0EVPTO(Xam -j9 WYY5:F"l9o&l:dyg^0GXoZgm[\H2#RrlXpZd`CAlwE.Sz.BuTiqT;E@m3I~`km&yeF AASHTO is typical mass of 4.1 sy/oz.. 2. Where applicable, inspect the footing areas and foundations for evidence of instability or areas where hydrostatic pressures may develop. When slope protection is paid by weight, refer to the discussion of weighing and metering procedures in Section 3-902E, Weighing Equipment and Procedures, of this manual. Contact your local TenCate Geosynthetic representative for the proper use and specification of these products. RG12N Nonwoven Geotextile with a 300 lbs grab tensile strength and a flow rate of 65 gallons a minute per square foot. Your search for great running gear starts and ends with us. For measuring concrete or shotcrete, refer to Sections 4-90, Concrete, or 4-53, Shotcrete, of this manual. This handbook includes new and revised details for the various practices that are used in the development of erosion and sediment control plans. The samples will be crushed in the laboratory to sizes needed to perform tests. Use the size and composition of yarn that is recommended by the fabric manufacturer. If the rock layer is shown as 7 inches thick, comply with grading shown in the following table: If the rock layer is shown as 5 inches thick, comply with the grading shown in the following table: If the rock layer is shown as 4-inches thick, comply with grading shown in the following table: Granular material must contain at least 90 percent crushed particles when tested under California Test 205. endobj Note any changes that may have occurred between the preliminary design studies and the start of construction. Mirafi N-Series nonwoven polypropylene geotextiles are used for soil separation, drainage in Transportation, Building Site, and Water Infrastructure projects such as subsurface drainage, permanent erosion control and roadway separation applications. 0000004014 00000 n The heavier fabrics provide more strength and are less likely to tear when large class II or Class III boulders are placed on them. Mirafi 180N is a moderate weight nonwoven geotextile that meets AASHTO M288 Class 1 geotextiles for separation and subsurface drainage. Protection involves constructing a heavy mass of smaller rocks bound together by concrete. 1, METHOD B) (TON), ROCK SLOPE PROTECTION (NO. The Difference Mirafi N-Series Nonwoven Geotextiles Make: The placement of a flexible, porous geotextile between dissimilar materials so that the integrity and intended functions of both materials remain intact or are improved. (see Riprap Slope Protection Worksheet). Polypropylene is stable within a pH range of 2 to 13. The maximum height of the vertica l lower portions 3.5 feet. Also, ensure the contractor does not drop rock into place; otherwise, cracking or breaking may occur. If the rock contains an excess of fines or inadequate voids, the desired results may be impossible to obtain. In 2007, the FAA approved construction of a new center field taxiway (Taxiway Mike) to alleviate airfield congestion. Click on the to send the number to the 0000005681 00000 n Copies of these details are made available below in both Adobe Portable Document Format (PDF) and AUTOCAD Drawing (DWG) file formats. Geofabrics offers a range of engineered slope, embankment and retaining wall solutions of use in transport infrastructure projects. EZw5'dr=`j+2\8:U.|V,%)~h/X8ps Benchmark inspection of sampling and testing of rocks. If there are no prevailing agency specifications, it is recommended to follow AASHTO M288 for subsurface drainage applications. "QamV(Z3VL> Copies of these details are made available below in both Adobe Portable Document Format(PDF) and AUTOCAD Drawing (DWG) file formats. The Standard Specifications provide two methods of placement for this type of protection: Method A and Method B. 0000009704 00000 n %PDF-1.4 Flat or needle shaped rock must not be used unless the individual rock thickness is greater than 0.33 times the length. endobj << Class E Revetment Erosion Stone or Class E Revetment Erosion Stone or A A Engineering Fabric Ditch Bottom 2' 2' Anchor Slot W 6'' min. Stable rock sizes and flow depths for riprap-lined channels having gradients between 2 percent and 40 percent may The contract plans will designate the required rock layer thickness for each location. 0000002021 00000 n The bid item list and plans will specify which type of slope protection is to be performed. 0000015681 00000 n ), Geocomposite Wall Drain (w/ 6oz on 1 or 2 sides - Please specify.). This article studies the mechanical properties and stability of CC slope protection by comparing it with conventional material (shotcrete). There are three material gradation requirements based on required rock layer thicknesses. The best slope protection type for a given situation depends on the conditions where the installation is to be made, availability of protection material, cost of the various types, and protection desired. Ensure concrete is cured by one of the specified methods. The latest list of Item Codes is available from HQ Our TerraTex brand offers full-spectrum performance delivery - groundwater filtration and drainage, soil separation and reinforcement, geomembrane protection, sprayed liner substrate, oil-and-gas industry drilling pad and access-road enhancement, as well as pavement overlay and bond-breaker applications. concreted-rock slope protection (1/2 t, class vii, method b) (ton) 723215 concreted-rock slope protection (1/4 t, class v, method b) (cy) 723220 concreted-rock slope protection (1/4 t, class v, method b) (ton) 729011 rock slope protection fabric (class 8) 729012 rock slope protection fabric (class 10) 750020 rigid rail fall protection system Keep records up to date. For RSP Classes IX thru XI, use Class 10 RSP-fabric. When placing rocks, the contractor should ensure each placed rock is stable and not dependent on the one on top to hold it in place. Slope Protection consists of rock, concrete, or concreted rock or slope paving, ROCK SLOPE PROTECTION ROCK SHOULD DEMONSTRATE, THE PLACEMENT METHODS DESIGNATED BY CALTRANS, ADVANTAGES OF USING RIP RAP OR STONE PROTECTION FROM WILSON QUARRY (AROMAS), Make certain of the Product RequiredProject Service Requirements, Specifying Agency (Caltrans, Green Book, Army Corp or Other), Special Provisions addressing additional specifications, Certification Required (Submittals) Caltrans, Army Corps, other agency or engineer, Quantity Required (Specific GravityConversion Tons to Cubic Yards), Product Availability (Available when required, can handle Daily Shipping Requirements), The Reputation of your Supplier and their Products & Services, 100% Crushed Granite (Provides Superior Stability and Durability), Many different Rip Rap types available:All Caltrans Classes and Sizes, High Daily Production and Shipping Capacity (Can Handle Large & Small Jobs), Graniterock can provide delivery to your jobsite if desired. If your 20'x10' patio is to have a 6" base, then you should excavate a total area of 21' (20' +6" +6") by 11' (10' +6" +6"). Please enable scripts and reload this page. The plans will designate which type applies at each location. Any springs or water courses that might affect the stability of the design. For Type R, F, or Common stone riprap, provide Type 2 filter fabric when shown on the plans. Need quick pricing on Erosion Control Fabric? { , IMPLEMENTATION OF ROCK SLOPE PROTECTION (RSP) DESIGN. In making such a decision, observe the following: Take pictures to document existing conditions and verify that Form CEM-3101, Notice of Materials to Be Used, includes the materials for slope protection. The devices include ground covers and channel liners such as: 1. Decide whether modifications are necessary as a result of changed conditions. 0000005658 00000 n Products with a are available to meet BABA (Build America, Buy America) requirements. 0000007029 00000 n endobj Method B is not restrictive with respect to the placement of individual rocks. There are three material gradation requirements based on required rock layer thicknesses. endobj Links to important documents and pages can be found below the chart. 99 (30% off) Best Selling Saucony Flat Mask By mrhzid $8. Riprap is typically placed along graded ditch, channel, and shoreline banks over geotextile, which prevents erosional undercutting. Mirafi 1100N, 1120N and 1160N are heavy weight nonwoven geotextiles for more severe or extremely harsh conditions, such as rip-rap and revetment applications. It consists of a layer of very large stones interlocked together and acts as a barrier on slopes that are unstable because of seepage problems or in areas that are receiving a large concentrated flow. Testing must follow the frequencies shown in Section 6-1, Sample Types and Frequencies, of this manual. /OPM 1 Obtain rock samples for acceptance tests. Order corrective work when necessary. YOU MUST NOTIFY US FABRICS BEFORE RECEIVING PRICING. 3. Review the plans for the location and number of weep holes. Technical Support available for assistance. They are designed to protect against raveling-type rockfall that involves small-volume slope failures (up to about 7.6 m3 or 10 yd3) or blocks up to 1.5 m (5 ft), depending on the strength of the mesh used (Muhunthan et al. (b) Paving fabric specification requires a minimum mass of 4.1 sy/oz. FDM 10-10-3 If excess concrete remains on the surface, the finished product, when used in streams, will be too smooth and, along the protection, velocities will increase beyond those intended during design.
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