ENLOE HYDROELECTRIC PROJECT FERC PROJECT NO PUBLIC SAFETY PLAN. Final

Transcription

1 ENLOE HYDROELECTRIC PROJECT FERC PROJECT NO PUBLIC SAFETY PLAN Final November 18, 2013

2 Okanogan Public Utility District nd Ave N PO Box 912 Okanogan, WA ENLOE HYDROELECTRIC PROJECT FERC PROJECT NO PUBLIC SAFETY PLAN Final November 18, 2013 ii November 18, 2013

3 CONTENTS 1. INTRODUCTION GENERAL PROJECT DESCRIPTION SAFETY ISSUES General Project Setting Safety During Construction Safety During Operation Enloe Reservoir and Dam New Enloe Power Plant Old Enloe Power Plant Recreation Areas SAFETY DEVICES TABLES Table 3-1 Potential Safety Hazards and Protection Measures Table 4-1 and Safety Measures FIGURES Figure 3-1 Enloe Recreation Site Below Hydropower Facility Figure 3-2 Schematic Site Plan Enloe Recreation Site Figure 4-1 Project Safety Plan Overview Map Showing Safety Measures Figure 4-2 Detail Map Showing Safety Measures iii November 18, 2013

4 1. INTRODUCTION On July 9, 2013, the Federal Energy Regulatory Commission (FERC) issued a license effective July 1, 2013 to Okanogan Public Utility District No.1. The license authorizes the District to restore hydropower generation at Enloe Dam by constructing a new 9-MW hydroelectric power plant downstream of the dam that will replace the existing decommissioned 3.2 MW power plant. Enloe Dam is located on the Similkameen River at river mile 8.8 measured upstream of its confluence with the Okanogan River near the city of Oroville in Okanogan County, Washington. The dam and hydroelectric power plant commenced operation in 1923 and is presently 90 years old. The power plant was decommissioned in Pursuant to Article 307 of the FERC License, this presents an evaluation of public safety concerns and existing safety measures at Enloe Dam and recreation areas, and provides an assessment of the need for implementation of additional safety measures. 1-1 November 18, 2013

5 2. GENERAL PROJECT DESCRIPTION The licensed project is a 9-MW run-of river small hydroelectric project comprised of the following existing and new facilities: Enloe Dam - An existing 315-foot-long, 54-foot-high concrete gravity arch dam with an integrated 276-foot-long central overflow spillway; Three new 5-foot-high automated steel flap crest gates/flashboards to be installed on the existing spillway crest; Enloe Reservoir - An existing 76.6-acre reservoir (inundated narrow channel of the Similkameen River) with a storage capacity of 775 acre-feet at a surface elevation of 1,049.3 feet (OKPUD Datum); New 190-foot-long intake canal on the east abutment of the dam diverting flows into the new penstock intake structure; New 35-foot-long by 30-foot-wide reinforced concrete penstock intake structure; Two new above-ground 8.5-foot-diameter, 150-foot-long steel penstocks carrying flows from the intake to the powerhouse; New reinforced concrete powerhouse containing two vertical Kaplan turbine/generator units with a total installed capacity of 9.0 MW; New 180-foot-long tailrace channel, immediately downstream of Similkameen Falls; A 370-foot-long bypassed reach of river between Enloe Dam and the plunge pool downstream of Similkameen Falls; New substation adjacent to the powerhouse; New 100-foot-long, 13.2-kilovolt primary transmission line connecting the substation to an existing distribution line; ODIT Ditch Road; Enloe Dam Road; Appurtenant facilities. The project will normally be operated in a run-of-river mode whereby outflow from the reservoir to the Similkameen River via the power plant and spillway will be regulated to match natural inflow into the reservoir. To maintain flow in the river in the event of a power plant or transmission line outage, the crest gates on the spillway will open automatically to compensate for the decrease in outflow through the power plant. The power plant will operate 2-1 November 18, 2013

6 automatically and be remotely monitored from the District s control center. Periodic inspections will be made by operations and maintenance staff to monitor plant condition and safety. 2-2 November 18, 2013

7 3. SAFETY ISSUES 3.1 GENERAL This section presents information regarding potential public safety issues for the project. 3.2 PROJECT SETTING The project setting is a narrow river canyon which has steep rock bluffs surrounding a steep fast moving river that forms a series of rapids and pools. Enloe Dam is an existing 90 year old concrete dam that spans the river canyon with an overflow spillway that occupies most of the crest of the dam. Similkameen (Coyote) Falls is a 20 ft. (approx.) high waterfall located about 370 feet downstream of the dam. Due to the steep canyon topography, presence of the swift flowing river and presence of the existing dam and power facilities, there are existing public safety hazards as follows: access roads are narrow single lane gravel roads. The existing county access road to east of the dam has a very steep grade with a deeply rutted surface that has poor traction. The existing access road that follows the Oroville Tonasket Irrigation Ditch to the site from the north, has a low section that is subject to seasonal flooding during high flows. During winter the presence of ice and snow presents an additional driving hazard. The existing access roads converge in an informal parking area at the left abutment of Enloe Dam. A user-developed trail leads downstream past the site of the first original powerhouse at the falls, where it narrows and branches into multiple user-developed trails leading to the river s edge below the bypass reach and falls. These trails are used by casual visitors and fishers. There is rockfall on the trail from the steep cliffs above and some small slides along the edge. The trails are rough and rocky, and unsafe for visitors who are not agile. During medium and high flows, the river downstream of the project is unsafe for swimming, and is suitable to only experienced whitewater boaters. Care is required in walking on the rough trails, steep valley slopes and rock bluffs due to the fall hazard. Rockfall is an existing hazard due to the steep terrain, weathering of the conglomerate bedrock, and ongoing natural slope erosion processes. Wet ground surfaces near the river can be slippery. During winter there is snow and ice. Fishing, boating, swimming and recreational gold dredging occur at various locations in the river, primarily during low flows. These activities rarely occur on the reservoir. High water velocity, turbulence and rapids in the river when flows are elevated create a potential drowning hazard at all flows in the vicinity of Similkameen Falls, and 3-1 November 18, 2013

8 throughout the river at higher flows. The existing dam and spillway presents a hazard to boaters, swimmers and hikers. There are four large warning signs upstream of the dam and a safety cable with suspended grab ropes across the reservoir at a narrow point in the reservoir about 500 feet upstream of the dam. Occasional log jams at the Narrows area in the reservoir that form during the spring flood are an additional hazard for boaters. A takeout area for boats is provided on the east bank of the river just upstream of the Narrows. During mid-winter the reservoir is covered in ice, however the ice cover is usually not safe for walking. Other existing safety hazards include rattlesnakes and poison oak which require vigilance when walking in the project area. Enloe Dam is classified as a high hazard dam primarily due to its proximity to occupied flood plain lands on the Similkameen and Okanogan Rivers in Oroville. Dam safety and evacuation plans in case of an emergency are described in other project documentation. 3.3 SAFETY DURING CONSTRUCTION Public and construction worker safety standards for construction work are regulated by the Washington State Department of Labor and Industries per code: WAC. During construction of the Enloe Hydroelectric Project, the construction contractor will be primarily responsible for public safety in the project construction area. Prior to commencement of construction, the District will require the construction contractor to develop and implement a safety plan that addresses risks to both the construction work force and public during construction work. Construction safety plans typically address the following issues: Permits and procedures Emergency procedures Hazard communication/signage Fall protection Safety equipment Confined space entry Hazardous materials Fire Traffic control Fencing/barriers 3-2 November 18, 2013

9 Equipment operation Blasting Excavation/shoring Scaffolding/ladder use Lockout/tagout procedures Personnel protective equipment Noise/hearing protection Safety discipline Medical support Incident reporting For safety, it is recommended that the public be excluded from active work areas during the construction process due to the many safety risks involved. (This is addressed in PM&E Safety- 02). Construction exclusion will need to address both recreators accustomed to driving to the existing parking area above the dam, and those who may venture beyond the end of the existing trail on the west side of the river. During construction, public access will limited to areas upstream of the dam, outside of construction and staging areas. Access to the primitive put-in/take-out area in the riparian wooded area upstream of the dam will be available during most of the construction period. During periods when the put-in/take-out area is not available for use, a sign be placed upstream to alert boaters to use an alternate take out location. The area along the east bank of the river (extending approximately 250 feet above the dam and 550 feet below the dam), including all areas of active construction and materials stockpiling, will be off-limits to the public until major construction activities are completed. The off-limits area will be completely enclosed by a temporary chain link security fence. s will be erected at the entrance to main access road alerting visitors that construction activities are taking place and that portions of the site may be closed to public use. The District will continue regular site inspections and visitor contact during periods of active construction. Active work areas will include: 1. Enloe Dam and spillway 2. Construction staging area upstream of Enloe Dam 3. Intake and powerhouse construction site at Enloe Dam 4. Bypass reach area 5. Active spoil disposal areas There are three access roads from the Oroville-Loomis road into the site area. 1. Primary construction access will be via the existing road from the north which follows 3-3 November 18, 2013

10 the OTID canal. This road will be shared with the public. 2. The existing county road to the east will be closed to the public, and used as alternate construction access for smaller vehicles. 3. access to the west side of the river across the railroad bridge and along the old railroad grade will be shared with the public who use the recreation trail on the west side of the river. The contractor will be required to address access issues in the safety plan. Typical safety measures include warning signs, fencing, temporary barriers, and temporary closure of hazardous areas to public access. 3.4 SAFETY DURING OPERATION Potential public safety hazards and existing/planned protection measures during the operation phase of the project including Enloe Reservoir and Dam, New Enloe Power Plant, Old Enloe Power Plant and recreation facilities are listed on Table 3-1 and are summarized in the following sections Enloe Reservoir and Dam During operation of the new power plant, the existing reservoir and river downstream of the project will continue to be available to the public for recreation use. The existing hazard to water recreation in the vicinity of Enloe Dam due to the overflow spillway will continue so existing safety measures will be maintained. Addition of the intake channel to the new power plant will create an additional hazard for recreation use of the reservoir at the dam which will be addressed by additional warning signage and a new log boom (this is addressed in PM&E Safety-01). The existing take-out for boats that is about 600 feet upstream of Enloe Dam will be improved. large warning signs on the reservoir will be maintained. Due to the increase in normal reservoir water level, the existing take-out for boats at the upstream end of the reservoir will be supplemented by the development of improved access and take out at the BLM Miner s Flat take out New Enloe Power Plant The proposed new power plant at Enloe Dam will be an automatically controlled facility that will be remotely monitored by the District at their Okanogan Control Center. There will be regular visits by operation and maintenance personnel to monitor plant security, perform regular plant maintenance tasks and perform occasional major maintenance activities. The 370 feet long bypass reach of river between the dam and the pool downstream of 3-4 November 18, 2013

11 Similkameen Falls is dangerous for recreation use due to the danger of being swept over the Falls. A further potential hazard will arise with project operation the potential for rapid increase of river flow and water level. This change will occur when the new spillway gates open automatically to maintain flow in the river downstream of the project during a power plant outage. This hazard will be addressed by warning signs and warning devices comprised of a system of sound (air horn) and visual (strobe lights) devices to warn of imminent gate operation and increase of flow in this reach. Downstream of the project tailrace the planned net change in river flow due to operation of the spillway gates and power plant is low and is constrained by flow ramping requirements, however the addition of warning signs regarding potential changes in water level at downstream fishing or recreation sites is recommended Old Enloe Power Plant Safety hazards at old Enloe Power Plant are related to its dilapidated condition and the steep access trail from the railroad grade above the plant (this is addressed in PM&E Safety-03). Hazards include fall hazard, falling roof and structure debris, drowning hazard on the side that borders the river and sharp debris from vandalism of the structure. The future of the old Enloe Power Plant depends on public interest in preserving the facility as a historic resource. The District intends to solicit proposals from interested parties in taking over the facility as a historic site. Other options remain to be explored may include, but are not limited to, demolition and removal of the facility. The District, in consultation with BLM, has installed warning signs and security gates at the existing access trail to the old powerhouse. The District will coordinate with BLM and other land owners, as appropriate, to identify other options for preventing public access to the old powerhouse. For example, one option could be to install additional security fencing on the west bank of the river between the powerhouse and the old railroad grade Recreation Areas The District has prepared a Recreation Management Plan that identifies recreational facilities that will be improved or installed as part of the project (Figures 3-1 and 3-2). Key improvements that address safety include: REC-01: barricades and fencing will be installed to prevent unauthorized access beyond the proposed parking area. REC-02: trail improvements will address safety hazards associated with the existing, user-developed primitive trail described above. The trail will be graded and surfaced appropriately for casual foot traffic to a point below Enloe Dam. 3-5 November 18, 2013

12 REC-04: the existing informal boat ramp will be improved to accommodate changes in pool level and boat loading and unloading. The new boat launch ramp (which will also serve as a portage take-out for canoeists and kayakers) will be more than 300 from Enloe Dam and the intake channel. A log boom will be placed at the entrance to the intake channel to serve as a restraining barrier for any boaters or swimmers approaching the intake channel. REC-12: The District will place an information board in a highly visible location near the group parking area at the recreation site upstream of Enloe Dam. At a minimum, the information board will include a map showing recreational features in the Project Area, visitor rules, and safety information. The safety information will caution visitors about poisonous snakes, fireworks, unattended camp fires and swimming in the river. REC-17: The District will establish a snow plowing schedule for the access road to allow visitors winter access to project lands and waters. In addition road improvements will widen the access road from the north (which will become the only means of public road access to the site). Passing bays will be provided on the road, and it will be realigned to avoid the seasonally flooded low sections. On the west bank, the existing trail ends at an existing locked gate with signage that warns hikers not to trespass beyond that point. The District will continue to maintain the existing signs and system of safety cables and grab ropes above the dam. The existing system of safety cables and grab ropes is located more than 300 from Enloe Dam and the proposed intake channel. The cables and grab ropes serve as a means of restraint and escape for people approaching the spillway that were not able to exit the water at the boat launch as directed by instructional signs and warnings. The District will also install portage signs informing boaters and paddlers where to take out at the Enloe Dam recreation area. Portage signs will be large enough to direct boaters and paddlers to safe take-out locations. As is currently the case, information on the signs will be printed in English and Spanish. The size of lettering, and the signs themselves, will be of sufficient size that persons (even those with less than perfect eyesight) will not have to enter the danger zone to read the signs. Dam safety/warning signs will be designed so that when a boater is 300 feet away, the signs will be legible and easily noticed. Text on the signs will be worded to convey a message that clearly advises the reader of the real danger with statements such as: Danger - Dam Ahead, Danger of Drowning, or Stay Alive by Staying Out. International symbols indicating danger or hazard will be included on the signs to alert boaters who cannot read English or Spanish. 3-6 November 18, 2013

13 Location Road access from east Road access from north Road access from south overflow spillway Enloe Dam and abutments Plunge pool downstream of spillway New spillway crest gates Table 3-1 Potential Safety Hazards and Protection Measures Potential Safety Hazards Steep grade Rough surface Sharp bends Narrow single lane road Restricted passing zones Occasional flooding Old railroad bridge crossing Hazard to boaters or swimmers getting swept over spillway. Drowning hazard Fall hazard Fall hazard from abutments. ENLOE RESERVOIR AND DAM None Potential drowning hazard to hikers, fishers and swimmers due to high water velocity and turbulence during high flow. Operation of new spillway crest gates to maintain river flow during an unplanned power plant outage will cause rapid increase of flow over spillway and increase of water surface elevation, and water velocity in the bypass reach. None Protection Measures Additional Locked gate Restricted vehicle access Handrails and curbs on new bridge deck Four large warning signs Safety line with grab ropes, Boat takeout area Chain link fencing on east side None N/A Road closure Gates restricting access. Road realignment Passing bays age None Improvements to boat takeout area New chain link fencing Fencing on east side of river. Warning devices Warning devices NEW ENLOE POWER FACILITIES Intake channel Due to its proximity to the dam access N/A Fencing road, there is the potential for vehicles and pedestrians to enter channel. Potential fall/drowning hazard from Log boom Escape ladders banks of channel. Penstock intake Potential drowning hazard N/A Fencing structure Potential injury from automatic trash raking equipment and gate hoist equipment. Restricted access Warning signs Penstocks Potential fall hazard for public N/A Fencing climbing on penstock. Powerhouse Potential fall hazard from building N/A Fencing decks and roof. Mechanical and electrical equipment. Restricted access Tailrace Potential fall and drowning hazard N/A Fencing Escape ladder Substation Potential electric shock hazard. N/A Fencing 3-7 November 18, 2013

14 Protection Measures Location Potential Safety Hazards Additional Transmission line Potential electric shock hazard. N/A Elevation of conductors Access Penstocks Surge tanks Powerhouse Miners Flat take out Enloe Reservoir Bypass reach OLD ENLOE POWER FACILITIES Potential fall hazard on steep narrow access trail Steep rock bluffs above powerhouse Impassible during snowy conditions One existing woodstave penstock shell has been removed. The other penstock is deteriorating Potential climb/fall hazard. Possible entrapment. Climb/fall hazard Loose and falling building materials Sharp objects such as nails, glass, metal. Fall and potential drowning hazard on east (river) side of structure Locked chain link gate None None Gate on access trail RECREATION FACILITIES Road intersection None Steep grade to river See information for Enloe Dam & Reservoir See information for New Enloe Power Plant None Warning sign Possible removal Warning sign Possible removal Warning sign Possible adoption as historic site or removal Site information panel will include signage of alternative put in/take out locations. Access road and takeout will be improved. 3-8 November 18, 2013

15 Figure 3-1 Enloe Recreation Site Below Hydropower Facility 3-9 November 18, 2013

16 Figure 3-2 Schematic Site Plan Enloe Recreation Site 3-10 November 18, 2013

17 4. SAFETY DEVICES A list of existing and proposed safety measures for the Enloe Project is shown on Table 4-1. Locations of these safety measures are shown on the attached maps. Table 4-1 and Safety Measures No Type Status Location Description Language S24 - Construction Entrance to north access road Construction warning sign S25 - Construction Entrance to east access road Construction warning sign S26 - Construction OTID Road at project boundary Construction warning sign S27 - Construction Old railroad grade at project boundary Construction warning sign F01 Fence East abutment of Enloe Dam Chain link fence N/A F02 Fence Intake channel Chain link fence N/A F03 Fence Tailrace Chain link fence N/A F04 Fence Instream flow facilities Chain link fence N/A G02 Gate Intake structure G03 Gate Powerhouse entry gate G04 Gate Instream flow facilities G05 Fence Ellemham Draw Bridge Double gate in chain link fence Double gate in chain link fence Double gate in chain link fence Metal gate, Powder River type N/A N/A N/A N/A G06 Fence On trail to old Enloe powerhouse Chain link personnel access gate N/A O01 Other O02 Other O03 Other 1.5 miles upstream of Enloe Dam Boat take out N/A 600 feet upstream of Enloe Dam Boat take out N/A 500 feet upstream of Enloe Dam Safety line N/A O04 Other Miner's Flat takeout Boat take out N/A O05 Safety ladder Log boom Log boom across mouth of Intake channel N/A 4-1 November 18, 2013

18 No Type Status Location Description Language O06 Safety ladder Intake structure O07 Safety ladder Intake structure O08 Safety ladder Log Boom Safety ladder for escape from intake channel Safety ladder for escape from intake channel Safety ladder for escape from intake channel N/A N/A N/A O09 Escape ladder Powerhouse tailrace Escape ladder from tailrace on wall of powerhouse S03 East Bank of Enloe reservoir upstream of boat ramp/takeout Danger Ahead, Leave River Here S04 West bank of Enloe Reservoir upstream of boat ramp/takeout Danger Ahead, Leave River Here S05 West bank of reservoir at narrows adjacent to safety line across reservoir Danger, No Trespassing, Waterfall Ahead S06 East bank of reservoir at narrows adjacent to safety line across reservoir Danger, No Trespassing, Waterfall Ahead S07 East abutment of Enloe Dam on chain link fence Danger, No Trespassing S08 Crane structure adjacent to powerhouse Restricted Area, Unauthorized Persons Keep Out S09 Crane structure adjacent to powerhouse Restricted Area, Keep Out S10 Power pole between railroad and powerhouse/surge tanks Restricted Area, Unauthorized Persons, Keep Out S11 On 5 ft X 5 ft gate on trail to old powerhouse. Danger, Authorized Personnel Only S12 South portion of Concrete powerhouse foundation structure. Danger, Authorized Personnel Only S14 Tailrace Warning, Hazardous Area, Sudden Release of Water When Horn Sounds or Light Flashes 4-2 November 18, 2013

19 No Type Status Location Description Language S15 Tailrace S16 Tailrace area - east side S17 Instream flow facilities S18 Tailrace gate S19 Intake gate S20 Substation S21 Intake channel Warning, Hazardous Area, Sudden Release of Water When Horn Sounds or Light Flashes Warning, Hazardous Area, Sudden Release of Water When Horn Sounds or Light Flashes Restricted Area, Unauthorized Persons Keep Out Restricted Area, Unauthorized Persons Keep Out Restricted Area, Unauthorized Persons Keep Out Restricted Area, Unauthorized Persons Keep Out Restricted Area, Unauthorized Persons Keep Out S22 and Gate Old County road at Loomis Oroville Road Restricted Area, Unauthorized Persons Keep Out S23 and Gate Old County road at recreation site Restricted Area, Unauthorized Persons Keep Out 4-3 November 18, 2013

20 O01 N S24 Christensen Associates Inc. 11/19/2013 State Plane Washington North NAD 83 PSP- Figure 1 - Overview E:\OKPUD\Mapping\Enloe Map map O04 Public Safety Measures Legend No Type Status Description FERC Project Boundary F01 Fence Chain link fence S26 F02 Fence Chain Link Fence Gates F03 Fence Chain Link Fence Security Fence F04 Fence Chain Link Fence Access Road Realignment G02 Gate Double Gate in Chain Link Fence G03 Gate Double Gate in Chain Link Fence Spoil Disposal Area G04 Gate Double Gate in Chain Link Fence Construction Staging Area G05 Gate Metal Gate, Powder River type G06 Gate Chain Link Personnel Access Gate Construction Area O01 Boat Takeout Boat Take Out O02 Boat Takeout Boat Take Out O03 Safety Line Safety Line S04 S03 O04 Boat Takeout Boat Take Out O05 Safety Ladder Safety ladder for escape from intake channel O06 Safety Ladder Safety ladder for escape from intake channel O07 Safety Ladder Safety ladder for escape from intake channel O08 Safety Ladder Safety ladder for escape from intake channel O09 Safety Ladder Escape ladder from Tailrace S03 Danger Ahead, Leave River Here S22 S04 Danger Ahead, Leave River Here S05 Danger, No Trespassing, Waterfall Ahead S05 O02 S06 Danger, No Trespassing, Waterfall Ahead S07 Danger, No Trespassing S23 S08 Restricted Area, Unauthorized Persons Keep Out O03 S09 Restricted Area, Keep Out Figure 4-1 S10 Restricted Area, Unauthorized Persons, Keep Out O08 F01 S11 Danger, Authorized Personnel Only S21 S12 Danger, Authorized Personnel Only F04 S14 Warning, Hazardous Area, Sudden Release of Water When Horn Sounds or Light Flashes O07 F03 S15 Warning, Hazardous Area, Sudden Release of Water When Horn Sounds or Light Flashes G04 S16 Warning, Hazardous Area, Sudden Release of Water When Horn Sounds or Light Flashes G03 S17 Restricted Area, Unauthorized Persons Keep Out S17 S15 Enloe Hydroelectric Project S18 Restricted Area, Unauthorized Persons Keep Out S18 FERC Project No S19 Restricted Area, Unauthorized Persons Keep Out S09 S20 Restricted Area, Unauthorized Persons Keep Out S21 Restricted Area, Unauthorized Persons Keep Out G06 S22 Restricted Area, Unauthorized Persons Keep Out S12 S23 Restricted Area, Unauthorized Persons Keep Out S24 - Construction Construction warning - To be determined S08 S25 - Construction Construction warning - To be determined See Figure 2 Overview Map S26 - Construction Construction warning - To be determined S27 - Construction Construction warning - To be determined ft

21 N S22 S25 Christensen Associates Inc. 11/19/2013 State Plane Washington North NAD 83 PSP- Figure 2 - Detail E:\OKPUD\Mapping\Enloe Map map S05 O02 O03 S06 S23 S21 F02 Legend G02 O05 F01 FERC Project Boundary O06 Gates Public Safety Measures No F01 F02 F03 F04 G02 G03 G04 G05 G06 O02 O03 O05 O06 O07 O08 O09 S05 S06 S07 S08 S09 S10 S11 S12 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S25 S27 Type Fence Fence Fence Fence Gate Gate Gate Gate Gate Boat Takeout Safety Line Safety Ladder Safety Ladder Safety Ladder Safety Ladder Safety Ladder - Construction - Construction Status Description Chain link fence Chain Link Fence Chain Link Fence Chain Link Fence Double Gate in Chain Link Fence Double Gate in Chain Link Fence Double Gate in Chain Link Fence Metal Gate, Powder River type Chain Link Personnel Access Gate Boat Take Out Safety Line Safety ladder for escape from intake channel Safety ladder for escape from intake channel Safety ladder for escape from intake channel Safety ladder for escape from intake channel Escape ladder from Tailrace Danger, No Trespassing, Waterfall Ahead Danger, No Trespassing, Waterfall Ahead Danger, No Trespassing Restricted Area, Unauthorized Persons Keep Out Restricted Area, Keep Out Restricted Area, Unauthorized Persons, Keep Out Danger, Authorized Personnel Only Danger, Authorized Personnel Only Warning, Hazardous Area, Sudden Release of Water When Horn Sounds or Light Flashes Warning, Hazardous Area, Sudden Release of Water When Horn Sounds or Light Flashes Warning, Hazardous Area, Sudden Release of Water When Horn Sounds or Light Flashes Restricted Area, Unauthorized Persons Keep Out Restricted Area, Unauthorized Persons Keep Out Restricted Area, Unauthorized Persons Keep Out Restricted Area, Unauthorized Persons Keep Out Restricted Area, Unauthorized Persons Keep Out Restricted Area, Unauthorized Persons Keep Out Restricted Area, Unauthorized Persons Keep Out Construction warning - To be determined Construction warning - To be determined Security Fence S07 S14 F04 G04 Access Road Realignment Spoil Disposal Area S20 Construction Staging Area S15 O09 Construction Area F03 G05 S17 S18 G03 S16 Figure 4-2 S10 Enloe Hydroelectric Project FERC Project No S08 S12 S11 Detail Map G ft