Attachment 1: MMB Statement of Work 2197e

Statement of Work

MOD/MODE/US Bypass Canal Repairs

Statement of Work
Yuma Area Office – MOD/MODE/US Bypass
Canal Repairs

1. BACKGROUND

The MOD (Main Outlet Drain), MODE (Main Outlet Drain Extension), and US Bypass canals located in Yuma, Arizona convey agricultural drainage flows from farmland to the Cienega de Santa Clara in Mexico. The Bureau of Reclamation (BOR) is responsible for maintaining the integrity of the existing structures and conveyance system including inlets and diversions, gates, siphons, and linings. The existing system has been in continuous service and is showing signs of concrete deterioration and breakage along the canal at the concrete panels. Maintenance is required to prevent total failure of the canals.

2. LOCATION

Reclamation currently operates and maintains ground water drainage wells and associated water conveyance systems in and around Yuma County. Existing facilities impacted by the project are shown on the Canal Repairs Location Map, Drawing No. 423-303-60188.

3. SITE CONDITIONS

The weather in Yuma County is typical of the desert southwest. Annual highs and lows range from about 120 to 30 degrees Fahrenheit, with intraday variations of up to 50 degrees. Late fall and winter temperatures are generally mild with a slight possibility of freezing during the late winter months. Strong winds and dust storms are possible throughout the year but are generally experienced during the spring months. Thunderstorms and flash floods are also possible during the “monsoon” season which generally occurs during the late summer months (August and September). Rain is also possible during the late winter and early spring months. Average yearly rainfall for the Yuma area is approximately 3 inches. Reclamation’s MOD, MODE, and US Bypass canals are accessible from existing public roads and government maintained roads. Overhead and underground utilities may be present near to, parallel, or across existing reclamation drainage facilities. In addition to utilities, there are drainage wells, associated discharge lines, and miscellaneous farm equipment crossings. A portion of the work area is near the US/Mexico international border barrier wall. Coordination is needed to prevent any interference between projects.

4. OBJECTIVE

Establish a contract for the replacement and repair of concrete canal panels for the MOD, MODE, and US Bypass canals as specified in this Statement of Work and associated drawings. The proposed work will include, but not limited to, saw cutting, demolition, vegetation removal,