D2_Water_SOW_100323.pdf

D2 WATER SYSTEM UPGRADES (CIM‐0305‐69F)

NOGALES RANGER DISTRICT

STATEMENT of WORK Coronado National Forest

March 22, 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 Nogales Ranger District is listed below, by project site.

KENT SPRING CABIN

PURPOSE OF PROJECT

The Kent Spring water system is located in Madera Canyon of the Santa Rita Mountains on the Nogales Ranger District in Santa Cruz County at Township 20 South, Range 14 East, Section 1. Access to the site is provided by the two‐lane dirt National Forest System Road (NFSR) 4075. This road can be accessed via NFSR 70 (Madera Canyon Road).

The water system currently serves the Kent Spring cabin, a facility that is slated as part of the Forest Service cabin rental program. The water source for the site is an existing spring (Kent Spring). Water is piped from the spring to a storage tank, where it is chlorinated and then distributed to the cabin via a distribution line.

The existing tank has been identified as substandard during numerous inspections, and there is currently no sedimentation tank between the storage tank and the spring box to decrease sediment load in the line. This project seeks to remedy these issues.

Existing Tank and Shed at Kent Spring Cabin Kent Spring Cabin and Deck

PLANNED WORK

Please see the attached Kent Spring Cabin Water System Improvements plan (Sheets 1‐6) and Thrust Block detail. The proposed work for the Kent Spring water system includes:

Remove and replace the existing water tank with a new 1,000 gallon potable water tank. Tank shall be relocated to a site adjacent to the house, underneath the deck.

Remove and replace 400 feet of 2” and ¾” galvanized steel water main between the old tank location and the new tank site. New main is to be 2”

HDPE.

Remove the existing shed, and install a new enclosure which shall house a new chlorinator, pump, meter and pressure tank assemblies, including associated electric/automated controls. This enclosure shall also be located underneath the deck, adjacent to the house.

Fence the tank with 6 foot‐high chain‐link fence to prevent entry.

Connect to the existing supply line to the house – precise location of service entrance is unknown, but supply is located on the deck side of the house.

BOG SPRINGS

The Bog Springs water system is located in Madera Canyon of the Santa Rita Mountains on the Nogales Ranger District in Santa Cruz County at Township 19 South, Range 14 East, Sections 26, 35, and 36. Access to the system is provided by the two‐lane dirt National Forest System Road (NFSR) 70A. This road can be accessed via NFSR 70 (Madera Canyon Road).

The Bog Springs water system currently serves a majority of the recreating public in Madera Canyon. Its distribution system feeds hydrants at the Bog Springs Campground, Madera Trailhead Picnic Area, White House Picnic Area, and Proctor Trailhead Parking.

The current water source for the system is a springbox connected to Bog Springs.

Maintenance on the Bog Springs system has increased to a point that significant changes are needed to avoid continued issues. One of the two 20,000 gallon steel water tanks is in need of repair (the gaskets are leaking), and the existing shut‐off valves and pressure release valves on the system are old and ceasing to function, or are buried and not functioning properly. Additionally, fencing needs to be constructed to secure the sediment tank from unauthorized entry, and the chlorinator needs to be replaced.

Finally, the main distribution line was original installed in such a manner that it separates easily, and there is a known break in the line that leads to the Madera Picnic and Trailhead area – the most logical remedy for this issue is full line replacement.

Existing Tanks at Bog Springs

Existing Sediment Tank at Bog Springs – Fencing Required

Please see the attached Bog Springs figure, and attached Waterline Trench, Valve Box, Water Meter, Inline Valve, Drain Valve, Air Release Valve, and Pressure Reducing Valve detail sheets. The scope of work for the Bog Springs water system includes:

Repair the 20,000 gallon existing steel potable storage tank where it is leaking at the gaskets.

Replace approximately 1.4 miles of existing water distribution main, which is 2.5‐inch galvanized steel, with 2” thick‐walled HDPE. The main’s current alignment travels cross‐country, and can be reviewed in the attached map – the existing alignment shall be maintained with this project.

Replace approximately 500 feet of existing water distribution main in the Madera Picnic Area with 1” thick‐walled HDPE. The main’s current alignment is along‐side the circulation road through the Picnic Area.

Replace shut‐off valves, air release valves, and pressure reducing valves on the current system. Replace other in‐line appurtenances along the existing main as deemed appropriate.

Replace the existing chlorinator in‐situ.

Install 6‐foot‐high chain link fence with 3‐strand barbed wire on top around the sediment tank to prevent unauthorized access. Fencing shall include one 8‐foot double vehicle gate assembly. See attached details on Sheet 6 of the Kent Spring Improvement plans.

PENA BLANCA LAKE

The Pena Blanca water system is located at Pena Blanca Lake, which is located on the east side of the Tumacacori Mountains on the Nogales Ranger District in Santa Cruz County, at Township 23 South, Range 12 East, Section 23. Access to the site is provided by the two‐ lane unpaved National Forest System Roads (NFSRs) 289 and 4200. These roads can be accessed via the two‐lane unpaved State Highway 289 (Ruby Road).

As part of another ARRA project, the aged and rusting existing tanks at the site are being replaced with a single glass‐fused‐to‐steel bolted tank. The pump at the well is no longer mechanically functional, and is disconnected from its power source. Additionally, the supply line between the tanks and the pump is deteriorating, and needs replacement.

This project seeks to remedy these remaining issues.

Existing Well and Fencing at Pena Blanca Lake

Pena Blanca Lake ‐ Existing Power Supply (Overhead) Located Approximately 1/8 Mile from Well (Picture Taken at Well Site)

Pena Blanca Lake ‐ Existing Water Storage Tanks – View from Well Location

Please see the attached Pena Blanca Recreation Area Water System Improvements plan (Sheets 1‐10) and Thrust Block detail. The scope of work for the Pena Blanca water system includes:

Install 6‐foot‐high chain link fence with 3‐strand barbed wire on top around the water operations shed and tank to prevent unauthorized access. Fencing shall include one 16‐foot double vehicle gate assembly and one 3‐foot personnel gate assembly.

Replace 300 feet of 2” galvanized or PVC pipe that serves as the supply line from the well to the tank. The new supply line shall be 2” HDPE.

Replace the existing submersible well pump with a new 230‐volt, 2‐HP, 10 GPM submersible pump.

Re‐establish power from the overhead electric line located approximately 1/8th of a mile away from well. A pad‐mounted transformer shall be placed near the well, and primary electric line shall be trenched and placed underground across the fill material from the lake excavation.

Construct a new well operations shed next to the well to house the associated chlorinator, meter, etc.

Install a new water pedestal/hydrant near the lake, due east of the well approximately 300 feet and 1050 feet from the tanks. The service line from the tank to the hydrant shall be 2” HDPE.