SJ - Attachment 3 -Specifications.pdf

Connelly Creek Bridge Page 1 of 3 Supplemental Section 155 USDA Forest Service Project No. AG-4568-D-08-0017 May 21, 2009

Section 155.—SCHEDULES FOR CONSTRUCTION CONTRACTS

General: Add the following:

This project occurs within trout waters of North Carolina. No ground-disturbing work may occur within 25’ of the high water level of the creek between October 15 and April 15.

Disturbed areas within this stream buffer must be stabilized completely prior to October 15.

155.02. Add the following after the third paragraph:

155.02A Weather Delays.

(a) Weather Delay Definitions.

(1) Reasonably Predictable Weather. The number of workdays that can expected to be lost in any month due to rainfall based on 10-year historical weather data.

(2) Rain Day. A potentially lost workday on which rainfall is equal to or greater than

0.10 inches.

(3) Drying Day. A work day(s) immediately following a rainfall equal to or greater than

1.00 inch which is potentially lost because of wet ground conditions.

(4) Workday. A day not excluded from work by Section 108 of the Special Contract Requirements.

(5) Unusually Severe Weather. When the number of Actual Workdays Lost is greater than the calculated Total Lost Days for the month in question.

(b) Reasonably Predictable Weather. Determine Reasonably Predictable Weather for this contract by completing Table 155-1. Calculate data for Table 155-1 as follows:

(1) Using the last 10 years of historical weather data from the nearest NOAA weather data collection station, compute the average number of workdays lost (rain days plus drying days) for each month and the standard deviation from the average. Add the average number of workdays lost to the standard deviation.

(2) The Total number of Lost Days (Average Workdays Lost plus 1 Standard Deviation, rounded to whole days) will be considered normal for each month.

(3) Submit a completed Table 155-1 with the initial construction schedule.

(c) Unusually Severe Weather Under FAR Clause 52.249-10, Default (Fixed-Price Construction), the Contractor can request time for a delay due to Unusually Severe Weather.

Connelly Creek Bridge Page 2 of 3 Supplemental Section 155

The number of Actual Workdays Lost is calculated by first totaling the actual Rain Days plus the actual Drying Days occurring in the month in question. From this total, deduct any workdays meeting the following conditions:

(1) The Rain Day or Drying Day occurred on a non-work weekday such as a holiday.

(2) Rainfall occurred at a time when no weather dependent work was in progress or occurred during planned or unplanned shutdowns due to other circumstances such as equipment failure, strikes, material supplies, delays, etc.

(3) The Contractor was still working or able to work on weather dependent activities to the extent that less than 50 percent of the workday was lost due to weather.

If the net number of Actual Workdays Lost is greater than the Total Lost Days, then Unusually Severe Weather occurred during the month in question.

(d) Time Adjustments for Rain Delays. If the net number of Actual Workdays Lost to rain is less than the Total Lost Days for the month in question, no time adjustments will be made.

If the net number of Actual Workdays Lost is more, then an excusable time extension may be granted. The Contractor must submit a Weather Time Impact Analysis supporting any alleged delays due to Unusually Severe Weather.

(e) Delays Due To Other Weather Conditions. Delays due to other unusually severe weather conditions (snow, extreme cold or heat, high winds, etc.) must be supported with a Weather Time Impact Analysis using historical weather data.

155.02. Delete the last paragraph and substitute the following:

The Construction Contract Time shown on the construction schedule for contract completion or for any interim completion dates shall be the calendar dates established in the contract.

155.04. Add the following to the first paragraph:

For a computer-generated CPM, use Primavera software or software that is file-compatible with Primavera.

Add the following at the end of the Subsection:

TABLE 155-1

Project Number__________________________

Location of NOAA Data Collection Station__________________________

Data Years (10-year history): 19___ through 20___

Connelly Creek Bridge Page 3 of 3 Supplemental Section 155

REASONABLY PREDICTABLE WEATHER

MONTH AVERAGE WORKDAYS

LOST

STANDARD

DEVIATION

TOTAL LOST

DAYS

JANUARY

FEBRUARY

MARCH

APRIL

MAY

JUNE

JULY

AUGUST

SEPTEMBER

OCTOBER

NOVEMBER

DECEMBER