ITEM 671 EROSION CONTROL MATS
671.01 Description. This work consists of furnishing, placing, and maintaining Types A through
I erosion control mats. This work also consists of furnishing, placing, and maintaining seeding and mulching when the seeding and mulching is to be held in place with erosion control mats.
671.02 Materials. Furnish materials conforming to:
Seed and Mulch..................................... 659 Lime and Fertilizer ................................ 659 Erosion Control Mats ....................... 712.11 If the mat type is not specifically itemized, furnish any mat type listed in 712.11. Furnish staples consisting of 12 inch (0.3 m) No. 11 gage steel wire bent into narrow U -shape with the ends of the staples approximately 1 inch (25 mm) apart producing a 6 inch staple or furnish pins conforming 18 inch (450 mm) long, 1/4 inch (4.5 mm) in d iameter, with attached 1 1/2 inch (38 mm) washer. Drive staples until the staple is flush with the ground surface. Drive pins until the attached washer is flush with the ground surface. For clay, shale, and other heavy soils, furnish 3 inch (75 mm) steel staples, No. 9 gage or thicker with points approximately 1 inch (25 mm) apart, as required by the Engineer.
671.03 Construction. Before placing any type of temporary erosion control mats, prepare the
surface, apply the fertilizer and lime if specified, and seed as specified in Item 659 or as shown on the plans. Place the temporary erosion control mat in the locations shown on the plans.
A.Types A, B, C, E, F, and I. Construct erosion control mat Types A, B, C, E, F, and I as follows:
1.Within 48 hours after seeding and before placing the mat, evenly place mulch over the specified area at the following rates:
a.For straw mulch, use 30 percent of the rate specified in 659.14.
b.For wood fiber mulch, use 30 percent of the rate specified in 659.15.
c.For compost, use the same rate as specified in 659.16.
d.Asphalt emulsion tack or tackifier is not required.
2.Immediately after mulching, lay the mat strips flat, loose, parallel to the flow of water, and with the mat contacting the ground at all points. For mats placed in ditches, start the construction at the downstream end.
3.Where more than one strip is required to cover the area, overlap the strips at least 4 inches (100 mm). Overlap the ends at least 6 inches (150 mm) with the upgrade strip on top.
4.Place upgrade slots at the upgrade end of each strip of mat by placing a tight fold of the mat at least 6 inches (150 mm) vertically into the soil. Firmly tamp the soil against the end and staple the mat. If directed by the Engineer , bury other edges exposed to more than normal flow in a similar manner.
5.Place end slots between the ends of strips by placing a tight fold of the mat at least 6 inches (150 mm) vertically into the soil. Firmly tamp the soil and staple the mat.
6.Place check slots by placing a tight fold of the mat at least 6 inches (150 mm) vertically into the soil. Firmly tamp the soil and staple the mat. Space check slots so that one check slot or an end slot occurs within each 50 feet (15 m) of slope for slopes 3 to 1 or steeper.
7.Bury the edges of the mat where the mat abuts catch basins and other structures.
8.Secure the mat in place with staples driven vertically into the soil. Do not stretch or draw the mat taut during the stapling operation. Install three rows of staples for each strip of mat, with one row along each edge and one row alternately spaced in t he middle. Space staples not more than 3 feet (1
m.apart in each row. Staple all upgrade slots, end slots and check slots across the width, with staples spaced not more than 6 inches (150 mm) apart.
9.After completing the mat installation, seed over top of the mat in areas that the Engineer identifies as disturbed. Use a seed mixture conforming to Item 659 at the rate of 1 pound per 1000 square feet (5 g/m2) or with a mixture or rate shown on the plans.
B.Type G. Construct erosion control mat Type G according to 671.03.A, with the following exceptions.
1.Do not use mulch under the mat.
2.Overlap edges and ends by 1 1/2 inches (40 mm).
3.Do not bury the upgrade end or top edge of each strip unless required by the Engineer due to special conditions in the field.
4.The Contractor may elect not to provide check slots. However upgrade slots and end slots will be furnished.
5.Place the mat in contact with the soil.
671.04 Maintenance. Maintain the specified areas until all work in the Contract has been
completed and the Engineer issues the final acceptance. Restore damaged areas to the condition and grade existing just before placing the mat. Relime, refertilize, and reseed restored areas according to 659. Replace all damaged mats.
671.05 Method of Measurement. The Department will measure Erosion Control Mat, Type ___
by the number of square yards (square meters) completed and accepted. The Department will determine the area based on the surface area covered by the erosion control mat.
671.06 Basis of Payment. The Department will not pay for maintenance as detailed in 671.04
that is required due to the Contractor’s negligence, carelessness, or failure to install erosion controls. If erosion control items in the Contract are properly placed according to the Contract Documents, the Department will pay for maintenance detailed in 671.04 or according to 109.05. The Department will pay for liming and fertilizing of areas covered by the mats under 659. The Department will not pay for the seeding and mulching performed under or over the mats. The Department will pay for accepted quantities at the contract prices as follows: Item Unit Description 671 Square Yard Erosion Control Mat, Type ___ (Square Meter) 671 Square Yard Erosion Control Mat (Square Meter) 700 MATERIAL DETAILS Spec No. Material Material only Inspection or Sampling Requirements Additional Instructions Embankment Assure 203.02 Q and R materials conform to the individual material requirements. Sample materials when requested by the Engineer. Follow S 1015 for acceptance. Soil Embankment: 50 lb (23 kg) Granular Embankment: 50 lb (23 kg)
258.02 Load Transfer
Retrofit Silicone Sealant– Obtain letter of certification stating that the material meets the requirements of Item 258. Material to be shipped from manufacturer not more than 9 months prior to use. Patching material - Verify brand name of material is on QPL at the time of use. Notify District Testing if rejecting material. If material non-performs or looks defective during use submit a 1 quart sample to OMM. 304 Aggregate Base Perform compaction conforming to S 1015 and 304.05 Products will be supplied by a S1069 Pre-Qualified Producer/Supplier. Document in AWP. Notify District Testing if rejecting material. If material non-performs or looks defective during use submit two 60 lb bag samples to OMM for testing. PC Concrete Pavement Base Make two 6"x6"x4' beams for every 7500 yd² (6500 m²) or fraction thereof daily. Field test beams for required load for the specification. Report results in AWP. Core samples taken every 2000 sq. yds by Contractor. Conform to S 1064. 407 Tack Coat If obtaining a sample, draw at least 1 gallon from the sampling valve or tap and discard prior to obtaining a 1 quart sample. Tag and ship sample to the District lab for OMM Asphalt section testing. Document in AWP. Notify District Testing if rejecting material. If material non-performs or looks defective during use submit a 1 quart sample to OMM. 409 Sawing and Sealing Asphalt Concrete Pavement Joints Inspect material for condition. Document in AWP. Follow joint seal material sections for sampling and acceptance requirements. Notify District Testing if rejecting material. If material non-performs or looks defective during use notify District Testing and OMM. Spec No. Material Material only Inspection or Sampling Requirements Additional Instructions 421 Microsurfacing Emulsion and Tack Coat CSS-1hM: Certified Material per
702.16 Type C. See 702.16 section
below. 421 Tack Coat per 421.09: At project sample per 421.12.A. Tag and ship sample to the District lab for OMM Asphalt section testing. Document in AWP. CSS-1hM: Certified material: Submit to OMM. Non-certified material: Submit to OMM. Do not use until approved. 421 Tack Coat per 421.09. Dilute per 421.09. Do not use non-certified material to dilute. 451, 452 PC Concrete Pavement Make 6"x6"x4' beams for every 7500 yd² (6500 m²) or fraction thereof daily. Make two beams if testing before 7 days. Field test beams for required load for the specification. Report results in AWP. Core samples taken every 2000 yd by Contractor. Conform to S 1064.
451.09 B Dowel Bond
Breaking Material Check new light form oil by labels on new cans. No sampling required 499 Various Concrete Items A sample for concrete strength testing consists of a set of three 4 × 8 inch cylinders when the maximum nominal aggregate is 1 inch or less. For concrete with maximum nominal aggregate sizes greater than 1 inch, a sample consists of a set of two 6 × 12 inch cylinders. Once initial set has occurred, but no more than 48 hours after sampling, ship cylinders to District Testing with required documentation.
499.02 Water Potable water is satisfactory.
If question about water quality, obtain 1 gallon sample. Document in AWP. Notify District Testing if water appears to contain sewage, oil, acid, or other matter. 503.08 Excavation for Structures- Backfill Material Sample only when requested by the Engineer per Item 203. Soil Embankment: 50 lb (23 kg) Granular Embankment: 50 lb (23 kg)
507.09 Bearing Piles
Steel Pile Points Only use points from suppliers on the Approved List on the Office of Materials Management website. Document bearing piles in AWP. Notify District Testing if material non-performs or looks defective during use. Notify the contractor with non-compliance issues.
509.08 Reinforcing Steel
- Plastic support chairs Assure plastic supports conform to 709.15. Maximum spacing of supports in slabs, beams and girders to be 4 feet or less to prevent substantial deflection. 511 Concrete for Structures NON QC/QA SPECIFICATIONS Once initial set has occurred, but no more than 48 hours Spec No. Material Material only Inspection or Sampling Requirements Additional Instructions Make one set of cylinders each 50 yd³ or less. Document in AWP . Field or Standard Cure according to ACI/ODOT specifications. QC/QA SPECIFICATIONS Follow requirements of Item 455 for quality assurance sampling and testing. Document in AWP. after sampling, ship cylinders to District Testing with required documentation. Once initial set has occurred, but no more than 48 hours after sampling, ship quality assurance cylinders to District Testing with required documentation. 515 Prestressed Concrete Bridge Members Assure products are supplied by a source on the Certified List for S 1079 maintained by OMM. Receive with DSR. Check dimension and condition Document in AWP. If rejecting material because material non-performs or looks defective during use, notify District Testing and OMM.
515.15 Prestressed
Concrete Bridge Members - Corrosion Inhibitors Verify company and brand name of material is on QPL at the time of use. Document in AWP. For precast beams delivered on DSR, verification performed by OMM. 526 Approach Slabs Make one set of cylinders for each day, each 200 yd³. Document in AWP. Field or Standard Cure according to ACI/ODOT specifications. QC/QA SPECIFICATIONS Follow requirements of Item 455 for quality assurance sampling and testing. Document in AWP. Once initial set has occurred, but no more than 48 hours after sampling, ship cylinders to District Testing with required documentation.
609.02 Curbing,
Concrete Medians, and Traffic Islands - Stone Curbs Contact District Testing and OMM to assure stone curb conforms to requirements of 609.02. 613 Low Strength Mortar Backfill Supplier to perform trial batches of 1 cy to ensure flowable consistency and yield. Refer to Item 613.05 for alternate mix design. Submit Alternate mix designs for approval 30 days prior to Notify District Testing if rejecting material. If material non-performs or looks defective during use notify District Testing and OMM. Spec No. Material Material only Inspection or Sampling Requirements Additional Instructions placement...When using foundry sand, obtain written permission from EPA ten days before use. 632.11 Loop Detector Sealant Verify manufacturer is on QPL. Inspect for condition, appearance and package markings. Document in AWP. Notify District Testing if rejecting material. If material non-performs or looks defective during use notify District Testing and OMM. 653.02 Topsoil Obtain one (1) pint sample of material from each source and/or stockpile of visually different material from same source. Use friction top, air tight metal container supplied by the Department. Submit to Office of Geotechnical Engineering Operations. Samples will include a TE-31 form or AWP print screen.
657.02 RipRap for Tree
Protection Confirm with OMM that the aggregate source has an acceptable performance history. Sources with poor performance require test data conforming to ASTM D5240.
658.02 Tree Root
Aeration - Aggregate Assure source is on the Certified List for S 1069 maintained by OMM. Assure aggregate meets soundness requirements. For sources with no soundness history, obtain a 100 lb (45 kg) sample.
659.03 Liming
Materials Only accept materials from suppliers licensed in Ohio. See OMM website for list of Ohio Department of Agriculture list of licensed suppliers. Document in AWP.
659.04 Commercial
Fertilizer Only accept materials from suppliers licensed in Ohio. See OMM website for list of Ohio Department of Agriculture list of licensed suppliers. Inspect material for certified analysis and condition. Licensing is required. Notify District Testing if rejecting material. If material non-performs or looks defective during use notify District Testing & OMM. Spec No. Material Material only Inspection or Sampling Requirements Additional Instructions Non-standard application rate requires approval prior to use. Document in AWP. 659.07 659.08 659.09 S1022 Seeds Legumes Native Grasses and Wildflowers Verify manufacturer is on Certified Supplier List maintained by OMM. Receive with DSR and description bill of lading. Document in AWP. Verify District approval of seed mixture. 659.14 659.15 659.16 Mulch Material should be reasonably free from foreign matter that would inhibit seed germination. Notify District Testing if rejecting material.
660.02 Sodding
Materials Verify company and brand name of material is on QPL at the time of use. Certification required for each shipment. Document in AWP. Notify District Testing if rejecting material. 661 Planting Trees Shrubs, Perennials and Vines Only accept materials from licensed nurseries. See OMM website for list of Ohio Department of Agriculture list of licensed suppliers. Inspect material for condition. Plant material should be sealed until used. Document in AWP . Final acceptance should take place after period of establishment. Notify District Testing if rejecting material. STANDARD MATERIALS SPECIFICATIONS
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Source: Construction and Material Specifications, 2023 (rev. 7/17/2026) Edition. Pages 649–655 of 892. View official source ↗