342 ALASKA 2020 SECTION 623
623-1.01 DESCRIPTION . Establish a perennial stand of grass or other specified living vegetative
cover, by sodding, in areas shown on the Plans. Maintain the cover for the term of the Contract.
623-2.01 Materials.
1.Sod. Use livi ng native plants and grasses that grow in the more fertile soils near the project. Preferred plants include willow, alder, fireweed, calamagrostis, bearberry, red top, and other natural species. Establish fertility by observing the quality and quantity of the plants and grasses in their natural location. Collect sod out of sight of the roadway and within the right -of-way if possible. Obtain authority to remove sod from areas outside the right -of-way. Obtain approval of the sod in its original position befor e cutting. Cut sod in blocks of at least 6 ft2. Obtain approval to use different dimensions. Include an intact root system with natural soil at least 4 inches thick.
2.Fertilizer . Use a 28- 8-4 mixture in 300- grain pellets, meeting the requirements of Section 725.
623-3.01 CONSTRUCTIO N REQUIREMENTS. Prepare the area to be sodded by removing
oversize rocks, logs, wood, soil clods, paper, and other debris. Dispose of debris out of sight of the roadway. Smooth any rivulets eroded into the face of the slope, by ta pering the edges into the depressions. Smooth the area enough to allow planting sod.
1.Keep sod moist at all times. Water sod if necessary prior to cutting. Keep as much soil as possible in the natural state around the roots during digging, hauling and plant ing.
2.Use approved mechanized methods wherever possible to obtain and place sod.
3.Place sod on the designated slopes without excavating holes and within 6 inches of the locations specified on the Plans. Place each piece tightly against adjoining pieces. On s lopes steeper than 3:1, peg sod pieces as directed.
4.Fill and pack voids with suitable soil from the sod source. Tamp or roll sod firmly in place, to eliminate air pockets provide a smooth plane, level with the adjacent slope.
5.Fertilize the sod using 2 pell ets per sod block. Water sod within one hour of placing. Continue watering sod blocks until project completion.
623-4.01 METHOD OF M EASUREMENT. See Section 109, measured on the slope of the ground
surface.
623-5.01 BASIS OF PA YMENT. Watering will be paid f or under item 618.0003.____.
The contract price includes all cutting, hauling, placing, slope preparation, fertilizing, and cleanup. Payment will be made under: PAY ITEM Item Number Item Description Unit 623.0001.____ Sodding SY 343 ALASKA 2020 SECTION 624 CALCIUM C HLORIDE FOR DUST CONTROL
624-1.01 DESCRIPTION . Furnish and apply calcium chloride on the subgrade, base, or
aggregate surface course to control dust during construction operations. Use calcium chloride at locations and times specified or directed.
624-2.01 MATERIALS. Use materials that conform to the following:
Calcium Chloride AASHTO M 144, Type S, Grade 3
624-3.01 CONSTRUCTIO N REQUIREMENTS. Moisten the surface as directed before and after
applying dry calcium chloride. Uniformly distribute and mix dry or liquid calcium chloride in the top 1- 1/2 inches of road surface. Spread first application of calcium chloride at a rate of 1 pound per square yard of dry form equivalent for the full width of roadway. Apply additional calcium chloride at a rate of 1/2 pound per square yard for the full width of previously treated roadway. Shape and compact the roadway surface to final grade as specified in Section 203. Keep traffic off of the treated surface for 2 hours after application, or as directed.
624-4.01 METHOD OF MEASUREMENT. See Section 109 and as follows:
Bulk. By weighing in dry form. Packaged. By manufacturer’s packed net weight.
624-5.01 BASIS OF PA YMENT. Payment will be made under:
PAY ITEM Item Number Item Description Unit 624.0001.____ Calcium Chloride TON
Source: Alaska Standard Specifications for Highway Construction, 2020 Edition. Pages 370–370 of 584.