NATIONAL SCENIC AREA LAND USE PERMIT 1-lood River County Planning & Building Services 601 State Street —iS —o Hood River, OR 97031 Phone: (541) 387-6840 Fax: (541) 387-6873 Fee (rC) Collected by CA- Date Submitted ( /i c (Please USC dark ink) Applicant(s) Riverside Inc. Township 3N Mailing Address 111 S. Roswell Blvd 5203 S. 11th East Range 10 E Parma, ID 83660 Idaho Falls, ID 83404 Section 36A Project Address 554 H 35 Tax Lot 100 Hood River, OR Acreage 63+!- Phone (daytime) (208) 589-6908 Zone G-OS, EP OMA/SMA GMA Owner(s) (ifdifferent) Hood River County Fire Dist Mailing Address 601 State Street Water Dist___________________ Hood River, OR 97031 Irrigation Dist______________ Phone (daytime) (541) 386-2616 (Dept. Public Works) Sanitation__________________ Access______________________ Existing Use of Parcel: Use of Adjacent Parcels: Hood River County acquired the Drogerty through the PacifiCorg North: Open Space Powerdale Dam decommissioning groiect. The groOerty is currently East: State Highway used as open space and is subject to a Conservation Easement South: Open Space that orotects habitat and allows minor recreational use. West: Open Space :1
Transcript
NATIONAL SCENIC AREA LAND USE PERMIT
1-lood River County Planning & Building Services601 State Street —iS —oHood River, OR 97031Phone: (541) 387-6840 Fax: (541) 387-6873 Fee (rC)
Collected by CA-
Date Submitted ( /i c
(Please USC dark ink)
Applicant(s) Riverside Inc. Township 3N
Mailing Address 111 S. Roswell Blvd 5203 S. 11th East Range 10 E
Parma, ID 83660 Idaho Falls, ID 83404 Section 36A
Project Address 554 H 35 Tax Lot 100
Hood River, OR Acreage 63+!-
Phone (daytime) (208) 589-6908 Zone G-OS, EP
OMA/SMA GMA
Owner(s) (ifdifferent) Hood River County Fire Dist
____________________
Mailing Address 601 State Street Water Dist___________________
Hood River, OR 97031 Irrigation Dist______________
Phone (daytime) (541) 386-2616 (Dept. Public Works) Sanitation__________________
Access______________________
Existing Use of Parcel: Use of Adjacent Parcels:
Hood River County acquired the Drogerty through the PacifiCorg North: Open Space
Powerdale Dam decommissioning groiect. The groOerty is currently East: State Highway
used as open space and is subject to a Conservation Easement South: Open Space
that orotects habitat and allows minor recreational use. West: Open Space
:1
PROJECT DESCRIPTION
Detailed Description of Proposed Use and/or Development: The proposed project is to remove
approximately 750 linear feet of 100 dia. steel flume pipe that was left in place after the PacifiCorp
Powerdale Dam was decommissioned. A similar section of pipe was previously removed directly
upstream from the current pipe location. No improvements or structures are to be installed as part of
this project. The pipe has been declared surplus material by the owner who has elected to have it
removed. Removing the pipe will help reduce graffiti and bring the land closer to its original state. The
pipe is currently at-grade.
Footprint Size of’ Proposed Structure(s): This project has no proposed structures or buildings.
Total Square Footage of Proposed Structure(s): This project has no prooosed structures or buildings.
Building Height(s) and Number of Stories: This project has no proposed structures or buildings.
Exterior Siding Color(s): None
Exterior Trim Color(s): None
Exterior Roof Color(s): None
Other Exterior Color(s): None
(please submit samples of all proposed exterior colors)
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Proposed Exterior Building Materials: None
Length, Width, and Type or Road(s): This project has no proposed roads.
Percent Slope of Proposed Development Site(s): This project does not include any major site grading
or slopes. Site grading will be limited to filling voids created by the pipe’s removal which will match
existing grade. The pipe is on relatively level ground and any oradin should be less than 10% slope
and a maximum of 10 feet wide.
Cubic Yards of Grading Activities For All Proposed Structures, Including Buildings, Roads, Ditches, etc.
(L x W x H + 27 cubic yd): Fill material will be brought in to fill voids created by the pipe’s
removal. On average, the pipe is half-buried so the amount of fill will be approximately half the volume
of the pipe; i.e. Fill = 1/2 * L * A = 750 CY +1-.
Amount and Type of Vegetation to be Removed or Planted: Please see the attached re-vegetation
plane to be used in the disturbed area, once the re-grading is complete. There is no existing
vegetation to be removed.
NOTE: In the Rural Residential Zone of the GMA, “Accessory buildings” larger than 200 sq. ft. in area
or taller than 10 feet in height have the following limitations:
C 24” height limit; and,
C The combined footprints for all detached accessory buildings on a single parcel shall not exceed
1,500 square feet in area. This combined size limit refers to all accessory buildings on a parcel,
Including buildings allowed without review, existing building and proposed buildings.
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APPLJcA TION CHECKLIST
Unless otherwise indicated, the following information is required as part of all National ScenicArea applications:
ci Completed Application Formci Scaled Site Planci Scaled Elevation Drawingsci Key Viewing Area Checklistci Appl icantlProperty Owner Signaturesci Filing Feeci Staked and Flagged Project Areasci Grading Plan (freqnired
ci Landscape Details (ifnew landscaping proposed, especiallyJbr screeningpurposes)ci Additional Information, as deemed necessary by the County Planning Department
Only applications with the above required information can be accepted. Pursuant to Article75, Section 100 of the Flood Rive County Zoning Ordinance, this department has 14 clays toreview the application for completeness and notify the applicant of any deficiencies.
SIGNATURES
Signature of the property owner(s) indicates that the property owner(s) is/are aware that anapplication is being made on the subject property. Signature of the property owner(s) alsoauthorizes County planning staff reasonable access to the site in order to evaluate the application.
By signing below, I acknowledge that the information provided iii this application is accurate tothe best of my knowledge.
Applicant(s) ig alu e Dale:
L Date:
Property Owner(s)Signature (iFdiflrent from applicant): Date:
___________
Date:
,U /iL Th . ,D ,9_
3C2c1- --i )S//
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POWERDALE DAM (HISTORIC DISTRICT), WATER CONVEYANCE SYSTEM(POWERDALE CANAL)(POWERDALE FLUME)
has remained unchanged with one exception. In I 980, steel-plate turning veins/vanes apparently wereinstalled in sand-settling basin bays numbers 1 through 4 to increase the velocity of water passing throughthe basin.48
Box Flume
The original box flume was built of wood; the current flume, erected in 1991, is built of steel plate. Therectangular box of the flume is 12’-O” wide and 8’-4” deep and supported on wooden trestles constructedof heavy timber uprights, cross-braced with dimension boards. The flume connects the downstream end ofthe sand-settling basin and the upstream end of the transition structure.
Transition Structure
The transition structure is a poured-in-place reinforced concrete structure that provides a transitionbetween the box flume and the flowline. The concrete structure was built at the same time as the dam andretains its original form. Several design elements have been modified. including the removal of a wood-frame building that sheltered hoist equipment for the intake trash gate. According to historic photographs,the small building was similar in form and cladding to that of the canal gate-operating house and was cladwith wood shingles and fenestrated with four-over-four double-hung windows. The house has since beenremoved and replaced with a trash rake that is controlled from within the roller-gate house. whichcontains a water-level sensor that initiates the raising and lowering of the head gate and trash rake asneeded.49
This project involves removing 750 LF of weldedFlowline Pipe steel pipe, which is not original construction.
The flowline conveys water from the intake system to the powerhouse, approximately 4,300 feetnortheast. The flowline consists of alternating sections of wood stave, riveted steel, and welded steel pipethat vary in diameter from 8’-4” to 10’-O”. The original wood staves were constructed o green oruntreated Douglas fir. In later years, replacement staves of treated wood were purchased The stave pipeis fabricated from long pieces of wood jointed together, beveled along the edges to fit wi h adjoiningpieces (referred to as “Ke1say joints, according to a construction photo from 1923), and eld in place byround iron bands. The bands are threaded on one end; the threaded end passes through a ationary clampfixture and tension is maintained by tightening a nut on the threads. The riveted and welded steel pipeindicates the pipes age.
The flowline is supported above ground by concrete saddles. which are formed in pairs. A saddle, shapedlike a broad-based Y with a semicircular notch, is 9-0 wide at the base, approximately 12’-8” wide at
48 R. A. L, communication. February 28, 1980, PDX023274. Powerdale Sandtrap Studies, 1979/1980, box 1/1,sections 23. PacifiCorp. The spelling is inconsistent in the document.
Tom Becker. conversation with Heather Lee Miller, August 9, 2006.
POWERDALE DAM (HISTORIC DISTRICT), WATER CONVEYANCE SYSTEM(POWERDALE CANAL)
______________
(POWERDALE FLUME)(POWERDALE SAND-SETTLING BASIN)
\ (POWERDALE FLOWLINE)
\ (POWERDALE WOOD STAVE PIPELINE)
\ (POWERDALE STEEL PIPELINE)
\ (POWERDALE STEEL FLOWLINE BRIDGE)
\ (POWERDALE SURGE TANK)
\ (POWERDALE PENSTOCK)
\ OR — SHPO Case No. 07-552—3(Page 22)
the top of the Y, and the saddles are pitioned I 2’-O” apart on center. In cross-section, the base andfoundation of a saddle are approximatel’\1 ‘-0” thick and the radius of the notch is approximately 5’-5”.
The wood stave portions of the flowline re prone to expansion and splitting caused by exposure tosummer sun and freezing in the winter. In Idition, the loosening of metal retention bands allowedvegetation to insinuate itself into the pipe’s çterior. Until a yearly maintenance program of bandtightening and stave patching and replacemen\ was implemented in the 1930s, loss of water pressure andsubsequently power from leakage was high. S’eral methods were used to repair fault in staves. PP&Lemployees secured leak holes with cedar plugs,\atched larger faults with aluminum sheeting fastened tothe pipe with lag bolts, and in later years, lined tl interior of the pipe with metal sheeting and laterpolyethylene.°
Pipeline Bridge
The pipeline bridge is a steel Warren truss bridge that conveys the flowline across the Hood River at whatis known as Johnson’s Point. Plans for the bridge dating to as early as 1913 have been found, but it isunknown whether those plans correspond to the bridge that washed out in 1923, how long that bridge wasin use across the Hood River, or if it is the one still extant.52 The pipeline bridge is a riveted steel trussbridge similar in form to a railroad trestle. The pipeline bridge is 120’-O” long, 12’-O” high and 11 ‘-0”wide. Two reinforced concrete piers support the bridge on either side of the river.
Pens tock
The riveted steel penstock is 74’-O” long and 8’-4” in diameter. The penstock functions to help control thewater flow and connect the lower end of wood stave flowline to the surge tank. The penstock is original
50 Derived from photos, drawings, miscellaneous memos and records on file with PacifiCorp. See also Luttrell.“Powerdale Dam,” 7:4.‘ p. A. Tennis, communication, February 13, 1978, PDX007949, box 1/1, sections 2/3, PacifiCorp.
2 See P.L. & P. Co., Pipeline Bridge, Hood River, Ore., April 2, 1913, PD-2751, Powerdale Flowline Rebuild. PDX007920, Hydro-Powerdale, Betterment Projects, 1/1, 1/3 (Front), PacifiCorp. Russ and Dave thought that it had beenreplaced or rebuilt after 1964 flood, but no documents have been found to support this.
Indicates that anywelded steel pipehas likely beeninstalled since1977; i.e. less than50 years old.
In 1977, after over 50 years of battling split and buckling staves, leaks, and loose retention bands. PP&Limplemented their “10 Year Replacement Plan,” which would focus on the replacement of all remainingwood stave portions of the flowline with prefabricated steel pipe. This plan was aimed at saving both timeand material costs. A 1977 memo reciting a litany of problems that the replacement of wood stave pipewith prefabricated steel pipe would alleviate, simply states that “steel is less expensive than wood.”’Presently, some portions of the wood stave flowline have been replaced with prefabricated steel pipe butmuch of the wooden pipe is still in service. Documents indicate that none of the original wood stave piperemains.
POWERDALE DAM (HISTORIC DISTRICT). WATER CONVEYANCE SYSTEM(POWERDALE CANAL)(POWERDALE FLUME)
CONSTRUCTION AND MAINTAINANCE OF POWERDALE WATER CONVEYANCE SYSTEM
1913- Temporary bridge for flowline at Johnson’s Point
1922- 1923— Construction completed and project dedicated
1950- 195— Wood flume rebuild
1964- Highest runoff on record for Hood River and project sustained heavy damage- Modification of support leg of surge tank and painting of surge tank
1975, 1976, 1977— Major flowline repairs
1979-1980— Modifications to sand-settling basin
1981— Replacement of “Flat Top” section of flowline with steel pipe resting on concrete footers
1982— Replacement of “Cedar Creek section of flowline with steel pipe resting on concrete footers
1985— Cabin” section of flovline rebuild. plus bridge built to a manhole. (This was apparently the last sectionof original wood pipe to be replaced.) Concrete foundations were also repaired in many places where soilerosion had undermined footers.
1990— Flowline catwalk replaced (wooden planks replaced with steel walkway)
POWERDALE HYDROELECTRIC PROJECTOR — SHPO Case No. 07-552
(Page 126)
steel, 1976iconst.” This is the
rtion to be removed.
Figure 110. Hood River, Oregon, Powerdale Development, Canal Flume & Pipe from Dam toPowerhoiLse Configuration and Alignment,” February 17, 1984, Pacific Power & Light Co., PD-37492,Sheet I of 1, HCF-3-CA, Powerdale History II, Runner Maint. Hist., PDX 026971, Hood River Project—Powerdale Plant—Material Storage and Maintenance Shop Building—1965, Box 1/I, Section 2/3,PacifiCorp.
Revegetation PlanHood River Pipe Project
Revegetation PlanHood River Pipe Project
Version: May 2015
General
Lands that will be disturbed by project will include:
A 750 ft long by approximately 15 ft wide pipeline construction corridor (- 0.26 acres total)
All disturbed areas will be revegetated after pipe removal and final grading. The goal of this Plan is to
specif’ the actions that will be taken to restore the areas disturbed by the project to a condition that
provides wildlife forage and prevents weed incursion.
Disturbance Area
Figure 1 shows a site plan of existing project facilities showing where the pipeline removal will occur.
The total amount of revegetation area in Figure 1 comprises about 0.26 acres. Revegetation practices will
not be implemented along the existing access road or graveled parking areas. These areas are to remain
undisturbed.
Plant Species Mix
Table 1 lists the seed mix and planting density proposed for reseeding of all disturbed areas. The seed
mixture would be certified weed-free.
Table 1. Proposed seed mixture and planting density.
____________________________ ________
Plant Planting density
Crested wheatgrass or Native Red Fescue 1 lbs/acre
Planting Requirements
Grasses will be planted as soon as possible after construction. Planting could occur from early summer
(after spring thaw) to late fall (before ground freezes). No irrigation or fertilization is required.
Monitoring Program
The licensee will conduct annual surveys of the revegetated areas for 3 years following the beginning of
project operations. Monitoring will be performed at the peak of growing season (mid-summer) by means
of photo surveys. The site will be visited annually, at the same time each year. to obtain photographs of
the area. During photo monitoring, general plant species and abundance information will be collected.
In the event that the monitoring program shows that reseeding has been unsuccessful in any areas, the
following corrective measures will be taken:
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Revegetation PlanHood River Pipe Project
1) Eliminate invasive noxiotis weeds in disturbed zones by localized use of approved herbicide
2) Reseed area with approved seed mixture
Implementation Schedule
Baseline monitoring surveys will be performed immediately following initial revegetation. Follow up
monitoring surveys will be performed mid-summer for the next three years.
Summary of Mitigation Measures
I) Ground disturbance will be minimized by using existing roads for access to the site.
2) All construction equipment will be washed to remove weed seeds prior to entering the
construction areas and will not leave the corridor until construction is completed; if equipment
leaves construction areas it will need to be re-washed prior to re-entering.
3) All ground disturbances of existing vegetated areas due to project construction will be subject to
revegetation tinder this Plan using a weed-free seed mixture as specified in Table 1.
4) The licensee will conduct surveys of revegetated areas for 3 years following completion of
