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UNITED STATES ENVIRONMENTAL PROTECTION AGENCYREGION 8

1595 Wynkoop StreetDENVER, CO 80202-1129

Phone 800-227·8917http://INww.epa.gov/region08

February 8, 2012

Riverton City, Utah - Water Pump Station Project

Categorical Exclusion forSpecial Appropriation Act Grant

For categories of projects that are so minor in scope that they may be determined by EPA not toneed a full environmental review. EPA makes the detennination if a project will qualify for aCategorical Exclusion based on information provided by the grantee.

I Project Description:

[Infonnation from the Epic Engineering, Trevor Andra, email to Dana Allen, 10/1 Oil 1]

Riverton City, Utah is proposing to install a secondary water pump station to correct pressuredeficiencies in the city's secondary water system. The secondary water system is used forwatering lawns and gardens, and it serves all residential and commercial lots within the cityboundaries. The secondary watcr system reduces the amount of potable drinking watcr neededfor the city. The city's current secondary water system was constructed between 1999 and 2008through a design build contract. The proposed Utah Lake Distribution Canal (ULDC) pumpstation capacity is 2,000 gallons per minute which is less than 10% ofthc city's existingsecondary water system which has a capacity of over 20,000 gallons per minute. The source ofadditional secondary water is the Utah Lake DistTibuting Canal which delivers water from UtahLake to its shareholders in the Salt Lake Valley. Riverton City owns water rights to water in theUtah Lake Distribution Canal.

Project location:

The proposed ULDC Pump Station will be located along 11800 South at Midas Creek Park(3300 West) in Riverton City.

Purpose and Need:

The purpose and need for the pump station is to increase existing pressure deficiencies in Zone 2(sec attachcd Figure "Pressure Zones") of the city's secondary water system during the peakwatering demand periods of May through October. The majority of the secondary watcr sourcesand storage systems arc located on the south side of the city which results in lower waterprcssurc in the north end of the system. The new pump station will provide a secondary watersource in the north end of Zone 2 thereby increasing water pressures during peak demand andreducing the amount of water being supplied from sources on thc south cnd of the system. Thenew pump station will provide a watcr source dircctly into the north end of Zone 2 which willincrease pressures during peak demands and reduce the amount of water being supplied fromsources that are on the south end of the system.

The system is split into 5 pressure zones (see auached Figure "Pressure Zones") which arcdelineated by several canals and the Jordan River which run north to south through the city. Thecurrent system has over 20,000 gallons per minute of source capacity that is supplied through acombination of canal diversions and shallow ground water wells and pump stations. The systemhas several open storage reservoirs and approximately 120 miles of underground pipe ranging insize from 4 to 24 inches in diametcr. The majority of the water sources and storage systems forthe existing secondary water system are located on the south side of the City. The current systemis inadequate to provide pressurized water to the north end of the system.

ICross-Cutters:

Cross-Cutters still apply to all Special Appropriations Act Project (SAAP) projects even if theyare granted a categorical exclusion from the NEPA. The entire list of Cross-Cutters can be foundin the SAAP Guidance memorandums. For additional information on potential Cross-Cutters secEPA's "Environmental Review Guide for Special Appropriations Grant," Appendix C@http://www.cpa.govIcompi iance/resources! poIicies/nepalenvi ronmental- review-guide-grant5-

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Typical Cross-Cutters that might appl}' to a Special Appropriations Act Project

Historic, Archaeological or Cultural Sale Source Aquifer-mainly MissoulaResources in Ree.ion 8Air Conformity -- Is the Project in a Near a Wild and Scenic River?

INonattainment Area?Any wetlands or waters of the U. S. Within a Floodplain?crossings?Environmental Justice On Prime Farmland?Threatcned and Endangered Species Special Wildlife Habitat, Wildlife

corridor

[lnfonnation from the Epic Engineering, Trevor Andra, email to Robert Edgar, 12/13/11]

No Cross·Cutters issues are anticipated for this project since the construction will be on thcnortheast comer of Midas Creek Park in Riverton City. This location borders 11800 S and the

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Utah Lake Distribution Canal. The following Cross·Cutters have been considered anddetennined not to be of concern in this project:

o Threatened and Endangered Species: The proposed project will not involve anyfederally listed threatened or endangered species or their habitats.

o Historic, Archaeological or Cultural Resources: No cultural resources were identifiedwithin the project area. Epic Engineering searched for properties on the NationalRegistry and none where found within a mile of the proposed project location.

o Within a Floodplain: No flood hazards were identified that are associated with theproposed project. A recenl FEMA Floodplain Map (See Figure 7) showing theproposed location of the pump station indicated a 0.2 percent annual chance of being ina flood hazard area. The benn where the pump station would be located isapproximately 10 feet higher than the surrounding park land.

o Prime Fannland: The project will have no effect on prime or important farmland.o Wetlands: No previously inventoried wetlands or plants or soils characteristic of

wetlands were found within the project area.

CATEGORICAL EXCLUSION CRJTERJA (40 CFR 6.204(a)(I)(ii))

J. NO known or expected potentially significant environmental impacts on public Yes ~health or the environment either individually or cumulatively over time. No 0

2. ]s the project for minor upgrade or minor expansion of system capacity? Yes ~This includes, but is not limited to: minor extensions of sanitary sewers or force mains or No 0

drinking water extensions to primarily serve existing development; stonnwater detentionpond and retention pond cleaning and dredging or minor storage increase or culvertupgrades to serve existing development.

3. Is the project for rehabilitation of existing facilities'! Yes 0

This includes, but is not limited to: functional replacement of existing systems and No ~

components, infiltration and inOow corrections in the existing wastewater collectionsystem or equipment rehabilitation at the existing wastewater plant, pumping, or storagefacilities; drinking water system equipment replacement or modifications at an existingwater plant, or pumping and storage facilities; stormwater culvert and outletrehabilitation and repair.

4. Is the project for new minor ancillary facilities adjacent to or on the same Yes 0

property as existing facilities? No ~

This includes, but is not limited to: new wastewater facilities and equipment for sludgehandling, screening, flow equalization, disinfection, or laboratory facilities; new drinkingwator facilities such as alum sludge handling, filtration, flow equalization, chemicalstorage, chlorination, or laboratory facilities; facilities at existing stonnwater controllocations, such as sedimentation basins, infiltration trenches, detention pond to retentionpond retrofits, or oil and grit separators.

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If the answer to 1 is yes and at least one of answers to 2 through 4 arc yes; then proceed to the nextsection: Excluding Factors.Conversely. if the answer to I is no, or ifall answers to 2 through 4 are no then the project does notqualify for a categorical exclusion.

Excluding Factors (40 CFR 6.204(b)

(I) Project will have disproportionate impacts on any conununity: EJ, minority, etc. Yes 0

No Il!I(I) Project will involve new or relocated discharges to surface or ground water Yes 0

No Il!I(2) Project will result in substantial increases in the volume of discharge or the loadings Yes 0

of pollutant to the receiving water o Il!I

(3) Project will provide capacity to serve a population 30 percent greater than the Yes 0

existing population. No 00The new pump slation capacify is 2000 gallons per minule. The exisling syslem has over20, 000 gallons per minll1e capacily. Therefore, Ihe new pump stalion will increase IhecavacilV oflhe cilv 's currenl secondarv waler svslem bv less Ihan 10 oercenl.(4) Project will be in conflict with state or other regional growth plan or strategy Yes 0

No Il!I(5) Project will directly or indirectly relate to upgrading or extending infrastructure Yes 0

systems primarily for the purposes of future development 000

ICategorical Exclusion Finding:

Upon review of the application materials and NEPA regulations pertaining to the granting ofacategorical exclusion detennination, the EPA Region 8 finds that the City of Riverton's ProposedULDC Pump Station Special Appropriation ACl Project Grant has met the criteria to becategorically excluded from further EPA review.

Prepared by: Robert Edgar, Environmental Specialist8EPR-N(303)312-6669 W'"6ft.... o;./or;.c/;J...,

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U T A H DI S

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POPLAR CREEK CT

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12075 S

3700

W

3200

W

3740

WFIGURE 7

FEMA FLOODPLAIN MAPPROPOSED ULDC

PUMP STATIONRIVERTON CITY, UTAH

0 1,000500 Feet

1 INCH = 500 FEETµ

NOVEMBER 2011

Legend

Municipal Boundary

Riverton

South Jordan

HerrimanUV71

UV154UV68UV154

ProjectLocation

2700

WES

T

11800 SOUTH

Parcel Boundary

"/ Proposed Pump StationCanal / Creek

Floodway0.2 Pct Annual Chance Flood HazardAENWI Wetland

Aerial Photo 2009

13000 SOUTH

12200 SOUTH

44

00

WES

T

40

00

WES

T

12600 SOUTH

13400 SOUTH

48

00

WES

T

56

00

WES

T

13800 SOUTH

13

00

WES

T

17

00

WES

T

22

00

WES

T

32

00

WES

T

27

00

WES

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(RED

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RO

AD

)

36

00

WES

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Herriman

South Jordan

Bluffdale

Draper

11800 SOUTH

1 1

RIVERTON CITY2