IFS: 6024 – Wailuku River, Maui
Instream Flow Standard: Hydrologic Unit of ‘Īao (6024)
Instream Flow Standard
|
CFS
|
MGD
|
Location / Notes
|
|---|---|---|
| 15.47 | 10.0 | The IIFS just below the diversion operated by Wailuku Water Company on ‘Īao Stream (Wailuku River) above the ‘Īao-Waikapu and the ‘Īao-Maniania Ditches shall be 10 mgd. |
| <15.47 to 9.44 | < 10.0 to 6.1 | When the average daily flow measured at USGS stream-gauge station 16604500 on ‘Īao Stream is between 15 mgd and 10 mgd and has continued in that range for three consecutive days, the greater of one-third (1/3) of the stream flow or 3.9 mgd may be diverted for noninstream use until the flow returns to 15 mgd or above. |
| 10.21 or less | 6.6 or less | When the average flow for any day falls below 10 mgd, commencing the next day and continuing until the average daily flow returns to at least 10 mgd, 3.4 mgd may be diverted for noninstream use. |
Gaging
Events
- Petitions to Amend the Interim Instream Flow Standard for Waihee, North and South Waiehu, Iao, and Waikapu Streams and their tributaries
- CCH-MA06-01: Iao Ground Water Management Area High-Level Source Water Use Permit Applications and Petition to Amend Interim Instream Flow Standards of Waihee, Waiehu, Iao, & Waikapu Streams Contested Case Hearing
- Surface Water Management Area Designation of Waihee, Waiehu, Iao, and Waikapu Surface Water Hydrologic Units
- Surface Water Use Permits, Na Wai Eha, Maui
- CCH-MA13-02: Provisional Recognition of Appurtenant Rights, Na Wai Eha Surface Water Management Area, Waihee, Waiehu, Iao, Waikapu Streams, Maui, Hawaii
- CCH-MA15-01: Surface Water Use Permit Applications, Integration of Appurtenant Rights and Amendments to the Interim Instream Flow Standards, Na Wai Eha Surface Water Management Areas of Waihee, Waiehu, Iao and Waikapu Streams, Maui
References
- Commission on Water Resource Management Order Adopting: 1) Hearings Officer’s Recommendation on the Mediated Agreement Between the Parties; and 2) Stipulation re Mediator’s Report of Joint Proposed Findings of Fact, Conclusions of Law, Decision and Order; April 17, 2014
- Oki, D.S., Wolff, R.H., and Perreault, J.A., 2010, Effects of surface-water diversion on streamflow, recharge, physical habitat, and temperature, Nā Wai ‘Ehā, Maui, Hawai‘i: U.S. Geological Survey Scientific Investigations Report 2010-5011, 154 p. [https://pubs.usgs.gov/sir/2010/5011/]
- Gingerich, S.B., 2008, Ground-water availability in the Wailuku area, Maui, Hawai‘i: U.S. Geological Survey Scientific Investigations Report 2008-5236, 95 p. [https://pubs.usgs.gov/sir/2008/5236/]