Sheetflow Construction Erosion and Sediment Control

July 2, 2019

Biofence Specification

I am trying to get to 100% biodegradable, recycled, reusable, recyclable, low impact best management practices.  I have used burlap fabric fence several times, anytime it makes sense, really.  I use it whenever I can leave it in place to degrade, like on habitat or wetland work.  In one of the photos, plastic zip ties are used to attach the fabric to the wooden stakes; this is a mistake and has been changed to staples in the specification.

Biofence Specification

Materials
U. BIOFENCE
A. Biofence shall consist of 7 ounce or heavier uncoated burlap fabric at least 36 inches wide and 100 feet long. Wood stakes dimensions shall be a minimum 1 1/8 x 11/8 inches by 42 inches high.

Construction Requirements
18. Biofence
a. Stakes shall be driven into the ground a minimum of 12 inches and be spaced no more than 6 feet apart.
b. Fence ends shall be joined by wrapping ends together around a post 3 times and driven into the ground.
c. Burlap fabric shall be attached to the post in at least 3 places using staples or other method approved by the Engineer.
d. When used as a barrier fence, fabric shall not be trenched into the ground. When used as a silt fence, a minimum 8 inch flap shall be left at the bottom and held in place with straw wattles staked in as detailed in item 9 above.

Payment
C. Payment for “TESC – Biofence” will be made at the contract unit price per linear foot as stated in the Schedule of Unit Prices and shall be full compensation for furnishing all labor, equipment, materials and tools necessary to complete the installation of the biofence as detailed on the drawings or as directed by the Engineer and specified herein. The unit price shall include all maintenance, the removal of biofence, and restoration of the area at the completion of the work

April 2, 2019

Migratory Bird Treaty Act Nest Removal

A little something different this week: we are going to do some demolition next to the waterfront this spring. Starting in April or May, seagulls begin nesting on buildings around the waterfront. When seagulls nest, you can’t demolish the buildings until you apply for and get permission for a “Take” of a bird covered under the Migratory Bird Treaty Act. This takes time, holds up the contractor, everyone gets frustrated. In order to head this off, I wrote some contract specifications, which hopefully, will keep this from happening

NESTING BIRD WATCH AND CONTROL

  1. Owner shall provide bird watch services up until 30 days after Contract Execution, to ensure there are no nesting birds that may impact the Contractor’s ability to perform work. At 30 days after Contract Execution, the Contractor shall take over full responsibility for this work.
  2. Contractor shall be responsible for preventing migratory birds from nesting on the roofs of buildings to be demolished. 
  3. Prevention shall include, at a minimum, once daily roof inspections to determine whether migratory birds are conducting nest building activity. 
  4. Nests that do not contain eggs and that are not in the possession of migratory birds shall be destroyed.
  5. Nests that contain one or more eggs shall not be disturbed and shall be immediately reported to the Engineer.
  6. Nests that are complete and in the possession of a migratory bird, with or without eggs, shall not be disturbed and shall be immediately reported to the Engineer.
  7. All Project delays and associated costs due to nesting birds discovered after the Contractor assumes responsibility for bird watch/control shall be the full responsibility of the Contractor.

February 16, 2019

Vacuum Sweeper Maintenance

If I specify a vacuum sweeper on a construction project, I expect it to be operational.

I require all systems to be functional per manufacturers specifications.

If not, the sweeper goes away, maybe the job is shut down, until a working sweeper is brought to the site.

Specifications:
1) Power brooms shall not be utilized without prior approval by
the Engineer.

2) Contractor shall have sufficient working vacuum sweepers on
site at all times work is being performed.

3) All sweepers shall have on-board water spray systems that
shall be operating at all times.

4) systems shall function per manufacturer specifications
including, but not limited to, spray water systems, blowers,
vacuum nozzles, hoses, debris hopper, hydraulics and
electrical.

5) At no time shall debris hopper seals leak debris and liquids.

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