D3_Water_SOW_100326.pdf

D3 WATER SYSTEM UPGRADES (CIM‐0305‐69F)

SIERRA VISTA RANGER DISTRICT

STATEMENT of WORK Coronado National Forest

February 26, 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 Sierra Vista Ranger District is listed below, by project site.

LAKEVIEW CAMPGROUND

PURPOSE OF PROJECT

The Parker Canyon Lake recreation area is located west of the Huachuca Mountains on the Sierra Vista Ranger District in Cochise County at Township 23 South, Range 19 East, Section 18. Access to the lake is provided by a paved two lane road that connects to State Highway 83 to the west. The recreation area includes a marina with paved parking, roadways, and boat launching area. The recreation area also includes Lakeview Campground which contains paved roadways and camping sites.

The current water source for the campground is an existing well located near to the edge of Parker Canyon Lake. While this well location currently meets ADEQ standards, a potential rise in the lake water surface from a year of heavy rainfall could put this compliance in jeopardy. This concern, coupled with a deteriorating supply water line that is well over a mile in length, indicates that a new well location would be advantageous to the system. If the new well is successful, this project will 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 Lakeview Campground water system includes:

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 10 feet 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 “Lakeview Campground – Well Improvements” figure and photo.

Install an outflow meter at the tank.

Install 6‐foot‐high chain link fence with 3‐strand 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 shed, and one 8‐foot double gate and one 3‐foot personnel gate at the well location. See attached details on sheet D‐1.

Abandon the old well that is near the lake. See Specifications for requirements.

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

CARR BARN ADMINSTRATIVE SITE

The Carr Barn is located east of the Huachuca Mountains at the intersection of State Highway 92 and Calle del Tecolote on the Sierra Vista Ranger District in Cochise County at Township 23 South, Range 21 East, Section 7. Access to the site is provided by the two‐ lane dirt road of Calle del Tecolote. The site is currently used to pasture Forest Service horse, store items from the various work groups on the District, provide trailer hookups for traveling road crews, maintain a pond for local threatened frog populations, and as a training site for off‐road‐vehicle and working‐dog law enforcement programs.

The current water source for the site is an existing well located within 50 feet of the barn structure. Potable water is attained by chlorinating water from the well and storing it in a small pressure tank. Both the chlorinator and the pressure tank are housed in a small store room located at the end of the barn. Non‐potable water is piped directly from the well to a 10,000 plastic storage tank located approximately 600 feet from the barn structure. From the tank, water is used to feed the frog pond and wildlife drinker located on the premises.

Given the age of the pump, and breaking and leaking issues with the current distribution system, it is proposed that the existing system be replaced, and new facilities added to accommodate the varied uses taking place on site.

Existing Potable Pressure Tank and Chlorinator in Utility Room of Carr Barn

Existing Wellhead at Carr Barn

Please see the attached Water System Improvements plans (Sheets C‐1, C‐4, D‐1, D‐2, D‐ 3, A‐1, and M‐1) and “Thrust Block” detail. The scope of work for the Carr Barn water system includes:

Potable Water System (serves 2 trailer pads and provides potable water for training programs and potable water for fire events):

o Install new chlorinator, pump, and meter o Provide a new water operations shed approximately 8 feet by 10 feet to house the chlorinator, fire pump, jet pump and pressure tank.

o Provide new hose bibs for potable water access.

o Replace existing distribution lines as necessary.

Non‐Potable Water System (serves wildlife drinker, frog pond, and horse corrals;

provides water for fire engines and tenders during fire events):

o Provide and install new 20,000 gallon tank.

o Install a new backflow prevention device.

o Provide top‐fill stand‐pipe for fire‐fighting vehicle use, as well as a standard 4‐1/2” hydrant at the same location.

o Install concrete pad to prevent access issues and allow for wash‐down of vehicles. Provide hose bib and hose wash rack.

o Provide automatic/timed shut‐off for well at the stand‐pipe.

o Install individual shut‐off valves at all trough, drinker, and tank locations.

o Install new 2” pipe from well to new tank. Provide new line from new tank to horse troughs.

o Install a new air‐release valve on the line from the existing tank to the wildlife pond.

o Replace all valves on the existing non‐potable system; add concrete valve boxes with steel lids to avoid damage by livestock; move existing valve downstream for drinker.

o Install new chain‐link fencing, as applicable.

CARR HOUSE ADMINISTRATIVE SITE

The Carr House is located east of the Huachuca Mountains along National Forest System Road (NFSR) 368 on the Sierra Vista Ranger District in Cochise County at Township 23 South, Range 20 East, Section 11. Access to the site is provided by the two‐lane dirt road NFSR 368. The site is currently used to as a base of operations for the Friends of the Huachuca Mountains, and as a staging point for fire and road crews. A permanent site host occupies a trailer pad adjacent to the House.

The current water source for the site is an existing well located approximately ¼ mile from the house. Potable water is attained by chlorinating water from the well and storing it in a small pressure tank at the well head. Both the chlorinator and the pressure tank are housed in a small well house.

The potable water is used to service the house, host trailer pad, and various outbuildings, including a small laundry facility. While the house itself has reasonable operating water pressures, the outlying buildings experience significant pressure drops, indicating that there are issues with the service lines. In addition, the supply line from the well to the house appears to be undersized for the amount of head loss experienced as the water is pushed uphill to the house. Finally, given the amount of use the site receives, it is desirable to increase the capacity of the potable water storage.

Existing Tank to be Removed at Carr House

Existing Wellhead, Pressure Tank, and Chlorinator at Carr House

Please see the attached Water System Improvements plans (Sheets C‐2, D‐1, D‐2 and M‐

2) and “Thrust Block” detail. The scope of work for the Carr House water system includes:

Install a new chlorinator, backflow prevention device, and pump at the well house. Install new meter. Increase size of pressure tank to increase storage capacity.

Replace supply line from pressure tank to house with 2” PVC. A portion of this line replacement may involve a harder‐than‐normal dig due to rocky terrain.

Replace distribution system to outlying facilities to resolve the pressure problem.

Remove existing steel storage tank near house.

CANELO ADMINISTRATIVE SITE

The Canelo station is located west of the Huachuca Mountains, approximately ½ mile north of the intersection of State Highway 83 and Membrillo Lane on the Sierra Vista Ranger District in Cochise County at Township 22 South, Range 18 East, Section 4. Access to the site is provided by the two‐lane dirt road Membrillo Lane. The site is currently used to pasture Forest Service horses, store items from the various work groups on the district, and provide trailer hookups for traveling road crews. The site also serves as a residence for Forest Service personnel, and a seasonal fire station.

The current water source for the site is an existing well located approximately 200 feet northwest of the main residence. Potable water is attained by chlorinating water from the well and then pumping the water uphill to the steel storage tank located at the top of the hill west of the residences. Both the chlorinator and the well head currently reside in a steel temporary building. Given the age of the pump, breaking and leaking issues with the current distribution system, and the need to provide water at the site for livestock and fire needs, it is proposed that the existing system be replaced and upgraded.

Existing Storage Tank at Canelo

Existing Wellhead and Chlorinator at Canelo

Please see the attached Water System Improvements plans (Sheets C‐3, C‐5, D‐1, D‐2, D‐ 3, A‐1, and M‐2) and “Thrust Block” detail. The scope of work for the Canelo water system includes:

Potable Water System: (serves 2 residences, 2‐3 trailer pads, a restroom in the office building, and provides potable water for fire events) o Install new chlorinator, meter, pressure tank and pump.

o Provide new structure to house chlorinator and pressure tank.

o Provide new hose bibs for potable water access at office building and barn.

o Replace existing distribution lines; install shut‐off valves at individual residences and trailer pads.

o Remove piping going to the residences at springbox (leave springbox intact) and fully abandon unused well near small house (see Specifications for abandonment requirements).

o Install new 10,000 gallon steel tank next to existing 10,000 steel tank. Care should be taken in placement of this new tank to avoid impacts to the active helipad located at the top of the hill, and to keep the water levels of the tanks equal.

o Install new backflow prevention device.

o Provide top‐fill stand‐pipe for fire‐fighting vehicle use at cleared turnaround / storage area by the trailer pad, as well as a standard 4‐ 1/2”hydrant at the same location.

o Install concrete pad to prevent access issues and allow for wash‐down of vehicles. Provide hose bib for wash‐down use.

o Provide automatic shut‐off for well at the stand‐pipe to prevent the well from continually running if it should be left unexpectedly.

o Install individual shut‐off valves at all trough and tank locations.

o Replace fire hydrant near office building with 4‐1/2” hydrant.

o Replace supply line from well to tanks.

o Install chain link security fence as needed.