D1_D4_Water_SOW_100315.pdf

D1 AND D4 WATER SYSTEM UPGRADES (CIM‐0305‐69F)

DOUGLAS AND SAFFORD RANGER DISTRICTS

STATEMENT of WORK Coronado National Forest

March 15, 2010 dmollet@fs.fed.us and bpayne@fs.fed.us

Throughout the campgrounds and recreation areas of the Coronado National Forest, water systems have been constructed to serve the recreating public with safe, clean potable water. A list of regular and deferred maintenance items are associated with each of these water systems – this project seeks to bring the systems up‐to‐date, and fix deferred maintenance issues with the water distribution lines and tanks.

Regular and deferred maintenance items are also present for the water systems that serve Forest Service administrative sites through the National Forest. This project will address those issues as well. A detailed discussion of the projects located on the Douglas and Safford Ranger Districts is listed below, by project site.

COCHISE STRONGHOLD TANK

(Douglas Ranger District)

PURPOSE OF PROJECT

The Cochise Stronghold water tank is located on the east side of the Dragoon Mountains along National Forest System Road (NFSR) 84 on the Douglas Ranger District in Cochise County at Township 17 South, Range 23 East, Section 25. Access to the site is provided via the two‐lane unpaved NFSR 84.

The existing tank currently provides water to the Shaw House cabin, listed in the “Rooms with a View” program for the Coronado National Forest. The age and condition of the tank is such that recoating of the interior and exterior of the tank is necessary for continued potable water use. There is also an old water tank adjacent to the potable water tank that needs to be removed.

View of existing 12,000 Cochise Stronghold tank to be Recoated at Shaw House;

Tank to be Removed is at the Right Side of the Picture

PLANNED WORK

The internal and external coatings of the existing potable water tank at Cochise Stronghold is failing, leading to rusting / corrosion of the tank and reduced service life.

The Contractor shall recoat the existing tank to re‐establish both coatings – please see specifications for requirements. As an additional contract item, the old tank that is sitting next to the tank to be recoat shall be removed and disposed off Forest Service land (at an appropriate facility if lead‐based paint is present).

RIGG’S FLAT RECREATION AREA

(Safford Ranger District)

PURPOSE OF PROJECT

The Rigg’s Flat Recreation Area water system is located at Rigg’s Lake, atop the Pinaleno Mountains on the Safford Ranger District in Graham County, at Township 8 South, Range 23 East, Section 26. Access to the site is provided by the unpaved National Forest System Road (NFSR) 287, which branches off of the two‐lane unpaved NFSR 803 (Swift Trail).

These roads can be accessed via the two‐lane paved State Route 366.

The existing water system that serves the Rigg’s Lake area is not in operation at this time.

The source of water (an existing spring close to the campground) is unreliable ‐ yield is very low and not enough to keep up with the demands of the recreating public at the very popular campground. In order to bring the system back into operation, it is proposed that a well be drilled near to the campground to serve as a new, potable supply source. If the drilling is successful, this project seeks to fully develop this new water supply, and connect it to the existing water distribution system that serves the campground.

PLANNED WORK

The scope of work for the Rigg’s Flat Recreation Area water system includes:

Supply, haul and placement of 50 tons of aggregate base course material for use as spur access road base the well site. This work includes one day of on‐ site backhoe/loader operation to distribute the aggregate base course and work the spur access road.

Drill a vertical potable water well. Comply with all Arizona Department of Environmental Quality (ADEQ) regulations concerning wells for state regulated public potable water systems and wells, as well as Arizona Department of Water Resources (ADWR) requirements.

Determine the thickness and character of the subsurface formations (including depth to bedrock), the static ground water level, and capacity of the aquifer formation used. These determinations shall be made from information obtained during drilling operations and after construction of the well.

If well drilling operation indicates sufficient water yield (to be determined by Contracting Officer), complete well construction and perform pump test as indicated on Schedule of Items.

If well does not yield sufficient water, or in other functional ways fails to provide the quality or quantity of water required, the Contracting Officer may instruct the Contractor to abandon the uncased drilled hole to ADEQ/ADWR standards for abandonment, including submission and completion of abandonment paperwork.

IF WELL PROVIDES SUFFICIENT WATER YIELD, CONTRACTOR IS TO ALSO PERFORM

THE FOLLOWING:

Install a solar power source to run a new solar well pump. See “Water Operations Shed – Sheet 2” details.

Erect a new masonry water operations shed adjacent to the well site. Shed is approximately 8 feet by 8 feet square and will house a new chlorinator, meter, and pressure gauge. See “Water Operations Shed” Sheets 1 and 2.

Connect the well to the existing tank (tank is not a part of this contract), through the water operations shed, with a new 2” supply line. The supply line will be HDPE unless otherwise called out in the attached details. See “Rigg’s Flat Well/Tank Location” figure for general locations.

Install an outflow meter at the tank.

Install 6‐foot‐high chain link fence with barbed wire on top around the tank, water operations shed and well to prevent unauthorized access. Fencing shall include one 16‐foot double vehicle gate assembly and one 3‐foot personnel gate assembly at the tank, and one 8‐foot double gate and one 3‐foot personnel gate at the well/shed location. See attached “Fence Details.”

Remove the existing infrastructure (such as pipes and springbox) at the spring in order to allow it to return to its natural state. The springbox consists of a 3’ x 3’ square of mortared CMU blocks approximately 3’ deep. Remove all visible piping adjacent to the springbox.

Please see attached “Water Meter,” “Valve Box,” “Inline Valve,” “Fence Details,” “Waterline Trench,” and “Thrust Block” details. Note that galvanized steel pipe must be installed at each appurtenance as shown on the detail drawings.

ARCADIA CAMPGROUND

PURPOSE OF PROJECT

The Arcadia Campground water system is located at the lower elevations of the Pinaleno Mountains on the Safford Ranger District in Graham County, at Township 9 South, Range 25 East, Section 18. Access to the site is directly off of the two‐lane unpaved NFSR 803 (Swift Trail). This road can be reached via the two‐lane paved State Route 366.

The existing water system that serves Arcadia Campground is not in operation at this time. The source of water (an existing spring close to the campground) has been positively identified as having surface water influence, and thus cannot be used as a supply of water. In order to bring the system back into operation, it is proposed that a well be drilled near to the campground to serve as a new, groundwater‐derived potable supply source. If the drilling is successful, this project seeks to fully develop this new water supply, and connect it to the existing water distribution system that serves the campground.

PLANNED WORK

The scope of work for the Arcadia Campground water system includes:

Supply, haul and placement of 50 tons of aggregate base course material for use as spur access road base the well site. This work includes one day of on‐ site backhoe/loader operation to distribute the aggregate base course and work the spur access road.

Drill a vertical potable water well. Comply with all Arizona Department of Environmental Quality (ADEQ) regulations concerning wells for state regulated public potable water systems and wells, as well as Arizona Department of Water Resources (ADWR) requirements.

Determine the thickness and character of the subsurface formations (including depth to bedrock), the static ground water level, and capacity of the aquifer formation used. These determinations shall be made from information obtained during drilling operations and after construction of the well.

If well drilling operation indicates sufficient water yield (to be determined by Contracting Officer), complete well construction and perform pump test as indicated on Schedule of Items.

If well does not yield sufficient water, or in other functional ways fails to provide the quality or quantity of water required, the Contracting Officer may instruct the Contractor to abandon the uncased drilled hole to ADEQ/ADWR standards for abandonment, including submission and completion of abandonment paperwork.

IF WELL PROVIDES SUFFICIENT WATER YIELD, CONTRACTOR IS TO ALSO PERFORM

THE FOLLOWING:

Install a solar power source to run a new solar well pump. See “Water Operations Shed – Sheet 2” details.

Erect a new masonry water operations shed adjacent to the well site. Shed is approximately 8 feet by 8 feet square and will house a new chlorinator, meter, and pressure gauge. See “Water Operations Shed” Sheets 1 and 2.

Connect the well to the existing tank (tank is not a part of this contract), through the water operations shed, with a new 2” supply line. The supply line will be HDPE unless otherwise called out in the attached details. See “Arcadia Well/Tank Location” figure for general locations.

Install an outflow meter at the tank.

Install 6‐foot‐high chain link fence with barbed wire on top around the tank, water operations shed and well to prevent unauthorized access. Fencing shall include one 16‐foot double vehicle gate assembly and one 3‐foot personnel gate assembly at the tank, and one 8‐foot double gate and one 3‐foot personnel gate at the well/shed location. See attached “Fence Details.”

Please see attached “Water Meter,” “Valve Box,” “Inline Valve,” “Fence Details,” “Waterline Trench,” and “Thrust Block” details. Note that galvanized steel pipe must be installed at each appurtenance as shown on the detail drawings.

COLUMBINE ADMINISTRATIVE SITE

PURPOSE OF PROJECT

The Columbine Administrative Site water system is located atop the Pinaleno Mountains on the Safford Ranger District in Graham County, at Township 8 South, Range 24 East, Section 29. Access to the site is directly off of the two‐lane unpaved NFSR 803 (Swift Trail). This road can be accessed via the two‐lane paved State Route 366.

The Columbine Administrative Site receives its water from existing water tanks south and east of the Site. These tanks are fed from the Columbine Spring. Water travels from the tank cross‐country via an existing 1.5” PVC water distribution line and crosses NFSR 803 through a culvert just south of the turn‐off to Old Columbine. From there it travels through the administrative site to serve various buildings, and then crosses NFSR 803, again through a culvert, to head north to the Columbine corrals as a 1” PVC line.

The distribution line described above is in a constant state of disrepair. Each season, the District staff is called on to repair numerous breaks in the line between the Administrative Site and the tank, as well as the line that leads to the corrals. The frequency and severity of the breaks is such that line replacement is needed to resolve the issue.

PLANNED WORK

The proposed work for the Columbine Administrative Site water system includes removing and replacing approximately 3,100 feet of water distribution main along its existing alignment (beginning at the existing concrete and metal tanks). The pipe to be used is thick‐walled HDPE, sizes as called out on the attached “Columbine Administrative Site – Waterline Replacement” drawing, unless otherwise stated. Any and all appurtenances along the main line shall also be replaced in kind at their existing locations. These include stainless steel or brass ball valves, drain valve assemblies, and air release valves. Also, a new hose bib/yard hydrant shall be installed at the corrals.

Locations of connections to spur lines and branches have been approximated in the drawing based on anecdotal evidence – more connections may be present and unaccounted for; the Contractor shall assume that an additional 8 connections to existing branch lines will need to be made.

Please see attached “Air Release Valve,” “Drain Valve,” “Valve Box,” “Inline Valve,” “Yard Hydrant,” “Waterline Trench,” and “Thrust Block” details. Note that galvanized steel pipe must be installed at each appurtenance as shown on the detail drawings.